CN102084065A

CN102084065A - Guardrail safety system for dissipating energy to decelerate the impacting vehicle

Info

Publication number: CN102084065A
Application number: CN2009801261792A
Authority: CN
Inventors: 阿卡姆·Y·阿布-欧戴施; 迪安·C·奥博森; 罗杰·P·比利格; D·兰斯·小布拉德; 尤金·C·布什
Original assignee: Texas A&M University System
Current assignee: Texas A&M University System
Priority date: 2008-05-05
Filing date: 2009-05-05
Publication date: 2011-06-01
Anticipated expiration: 2029-05-05
Also published as: MX361970B; IL209183A0; HK1191073A1; EP2313560A1; MX339695B; IL209183A; IL231529A0; CA2725225C; CL2009001078A1; NO2313560T3; PL2313560T3; CA2725225A1; AU2015249112A1; CN103526705B; CA2940944A1; IL231529A; AU2009244438A1; DK2313560T3; AU2009244438B2; CA2940944C

Abstract

In accordance with a particular embodiment of the present invention, an end treatment of a guardrail safety system includes a terminal portion of a guardrail beam that has a downstream end and an upstream end. The terminal portion of the guardrail beam slopes from a first vertical height appropriate for redirecting an errant vehicle to a second vertical height proximate the surface of the ground at an upstream end of the terminal portion of the guardrail beam. A flattening portion forms a channel through which the terminal portion of the guardrail beam is disposed. A vertical dimension of the channel is greater at a downstream end of the flattening portion than at an upstream end of the flattening portion. An impact plate is connected to the flattening portion for engaging an impacting vehicle at an end of said guardrail beam. During an end-on impact, the impact plate and the flattening portion are advanced longitudinally along the guardrail in a downstream direction by the vehicle. The advancement of the impact plate and flattening portion dissipate energy to decelerate the impacting vehicle. As downstream portions of the guardrail beam are forced into the flattening portion, the guardrail is flattened vertically. In accordance with a particular embodiment of the present invention, a terminal portion of a guardrail safety system includes a terminal portion of a guardrail beam having a downstream end and upstream end. The terminal portion of the guardrail beam slopes from a height appropriate for redirecting an errant vehicle to a height proximate the surface of the ground at an upstream end of the terminal portion.

Description

Be used for dissipation energy so that the guardrail security system that vehicle impact is slowed down

Technical field

The present invention relates generally to the safety measure (treatment) that is used for W beam guardrail (W-beam guardrail); Relate in particular to the guardrail terminal of tensioning, this terminal is used at correct (end-on) or break-in (re-directive) bump the Impact energy with the automobile of the end collision of W beam guardrail being dissipated.

Background technology

All have some harm along most of speedways, if automobile leaves speedway, these harm may have very big danger for the driver.In order to reduce the seriousness of leaving the accident that speedway causes owing to vehicle, be provided with guardrail.Guardrail is installed into makes the beam element be in tensioning state (in tension) to offer help in the bump of break-in type.But, guardrail north permitted to be installed into make these guardrails, do not become harm towards that end of the magnitude of traffic flow.Early stage guardrail does not have suitable terminal endways, and the vehicle of bump stings on the guardrail, causes violent deceleration of vehicle and grievous injury occupant's situation unrare.In the case of some reports, guardrail directly stings among the crew department through vehicle, and the occupant is caused mortal injury.

After the problem of recognizing suitable guardrail terminal, developed the guardrail design of using box beam and W beam, the end that these beams allow guardrails is in landing ground and be tapered (taper).The effect of any lance formula has been eliminated in these designs.Although the danger that vehicle is pierced has successfully been eliminated in these terminal measures in central collision, but find that these terminal measures are with the mode work that is similar to the inclined-plane, and may cause that vehicle is dished out, and make it the very big segment distance of flight, may cause and topple.

In the process of seeking better terminal measure, developed the terminal measure of energy absorption of the improvement that is used for W beam guardrail element.For example developed extruder (extruder) terminal, this terminal generally includes bending structure, and this structure is squeezed guardrail become dull and stereotyped, then it is bent around circular arc, and described circular arc is back to vehicle impact.The ET 2000 that is provided by TrinityHighway Products is provided exemplary extruder end product ^TMAnd ET-PLUS ^TMOther extruder end product comprises the Systems by Road, the SKT 350 that Inc. provides ^TMWith FLEAT 350 ^TM

These all energy absorber systems all use cable that the one w beam guardrail section is connected to first pillar in the system.Cable provides tension force in guardrail beam element, be used for colliding along the break-in that the part of guardrail Len req is carried out.Many cable slack pillars have been developed to be used in these terminals.These cable slack pillars are intended to: when pillar when positive (correct bump) or reverse side direction are subjected to clashing into, make cable anchor (anchor) lax, thereby and the tension recovery in the system got off.In the knockout process of enemy's bump and reverse type, these systems can not remain in tensioning state.

Summary of the invention

The invention provides and be used for freeway guardrail, new and improved terminal measure.

According to a particular embodiment of the invention, a kind of terminal measure of guardrail security system comprises the terminal part of guardrail beam, and this part comprises upstream extremity and downstream.At the upstream extremity place of the terminal part of guardrail beam, the terminal part of guardrail beam is not from the first vertical high inclination that is suitable for the drift vehicle is redirected to subaerial second vertically highly.Planarization partly forms raceway groove, and the terminal part of guardrail beam passes described raceway groove and arranges.The vertical size of raceway groove is bigger at planarization upstream end portion place at the downstream end ratio of planarization part.Crash panel is connected to the planarization part, is used for engaging with vehicle impact in the end of guardrail beam.In correct knockout process, vehicle makes crash panel and planarization part longitudinally advance on downstream direction along guardrail.This advancing of crash panel and planarization part dissipated energy so that the vehicle impact deceleration.Along with the downstream part of guardrail beam is forced in the planarization part, the guardrail in the vertical direction is flattened.

The technological merit of specific embodiments of the invention comprises: the terminal measure of guardrail dissipates Impact energy by the compression of W beam guardrail element.Therefore, an advantage can be that the terminal measure of this guardrail is an energy-absorbing.Another advantage can be, this end measure forces W beam guardrail element through plat structure, and this plat structure squeezes comparatively smooth plate with guardrail.Particularly, the terminal measure of this guardrail can be by making a part of planarization of guardrail, the Impact energy of the terminal collision of vehicle and guardrail that dissipates.

Another advantage can be that the end of W beam guardrail element passes plat structure and extends, and attenuates to landing ground.W beam guardrail element can be fastened to ground with tensioning state.Provide the system element that tensioning is connected between guardrail beam and the terminal supporting strut can make the guardrail beam after enemy or break-in bump, keep fastening.Like this, this system can all keep tensioning in two types knockout process.But another advantage can be that when system was subjected to oppositely clashing near terminal, this tensioning state can unclamp.The tensioning state that unclamps the guardrail element for reverse bump has prevented vehicle unstability and excessively deceleration.

According to a particular embodiment of the invention, a kind of terminal part of guardrail security system comprises the terminal part of guardrail beam, and the terminal part of guardrail beam comprises upstream extremity and downstream.At the upstream extremity place of terminal part, the terminal part of guardrail beam is highly vertical to subaerial second from the first vertical high inclination that is suitable for the drift vehicle is redirected.Supporting strut is installed with the contiguous highway of the mode that is spaced apart from each other, and is connected to the terminal part of guardrail beam.The terminal supporting strut is at the contiguous highway in upstream extremity place of the most last terminal and install.The terminal supporting strut is by upstream extremity resistant, that connected mode tensioning is connected to the terminal part of guardrail beam, and described connected mode resistant, tensioning is kept tensioning state in the terminal part of guardrail beam.In enemy that vehicle carries out bump or break-in knockout process, being kept resistant, being connected of tensioning between terminal supporting strut and the guardrail beam.But in reverse knockout process, being connected of resistant, the tensioning between terminal supporting strut and the guardrail beam is released.

Those skilled in the art understand the other technologies advantage easily from following accompanying drawing, manual and claim.In addition, although above enumerated multiple concrete advantage, various embodiment can comprise in these cited advantages whole, partly or not comprise.

Description of drawings

Fig. 1 illustrates the vertical view of the exemplary guardrail security system that comprises some aspect of the present invention;

Fig. 2 illustrates the lateral view of the terminal part of the fence sytsem that comprises some aspect of the present invention;

Fig. 3 illustrates according to a particular embodiment of the invention, the lateral view of the exemplary embodiment of terminal measure in the terminal part of fence sytsem;

Fig. 4 A and Fig. 4 B illustrate the lateral view and the outline drawing of the modified guardrail beam that comprises some aspect of the present invention respectively;

Fig. 5 A-5C illustrates according to a particular embodiment of the invention, is suitable for being used in the exemplary reduction supporting strut in the guardrail security system;

Fig. 6 A-6C illustrates according to a particular embodiment of the invention, is suitable for being used in the another kind of exemplary reduction supporting strut in the guardrail security system;

Fig. 7 A-7C illustrates according to a particular embodiment of the invention, is suitable for being used in the exemplary unmodified supporting strut in the guardrail security system;

Fig. 8 A and Fig. 8 B illustrate according to a particular embodiment of the invention, are suitable for being used in the exemplary embodiment of the terminal supporting strut in the guardrail security system;

Fig. 9 A-9C illustrates according to a particular embodiment of the invention, is used for the guardrail beam is connected to the various elements of the resistant tensioning connected mode of terminal supporting strut;

Figure 10 A and Figure 10 B illustrate according to a particular embodiment of the invention, are used for the guardrail beam is connected to the exemplary resistant tensioning connected mode of terminal supporting strut;

Figure 11 A and Figure 11 B illustrate according to a particular embodiment of the invention, are suitable for being used in the exemplary pole in the guardrail security system;

Figure 12 illustrates according to a particular embodiment of the invention, is used for the guardrail beam is connected to the alternative embodiment of the resistant tensioning connected mode of terminal supporting strut.

The specific embodiment

It is unsafe that the terminal measure of existing guardrail has been proved to be for some impact conditions that takes place on the speedway, comparatively responsive for details is installed, and/or very expensive.But terminal measure described below is the safety measure at W beam guardrail end, and it provides higher performance level in wider impact conditions, has reduced terminal measure cost and the injures and deaths number relevant with guardrail terminal accident.In the process of enemy's bump and break-in types of impacts, described system all keeps tension force in guardrail beam element.But when this system near terminal when oppositely being subjected to clashing into.Grappling (anchorage) system can relax, to prevent the vehicle unstability or excessively to slow down.

Fig. 1 illustrates the guardrail security system 100 that comprises some aspect of the present invention.Fence sytsem 100 is avoided various impairments and harm with protection vehicle, driver and passenger near can being installed in highway, and prevents that vehicle from leaving highway in traffic accident or other harm conditioning processes.The fence sytsem that comprises these aspects of the present invention can be used for isolation strip or curb in speedway, highway maybe may face any paths of vehicular traffic.

Fence sytsem 100 comprises guardrail beam 102 and supporting strut 104, and these supporting struts are on the throne with 102 grapplings of guardrail beam along highway.In specific embodiment, guardrail beam 102 can comprise a plurality of No. 12 (12-gauge) W beam hurdle elements, and the length of this element is in about 12.5 feet or 25 feet magnitudes.These guardrail parts can be installed in the height of about 27 to 31 inches magnitudes, the middle span place of the fastener of beam between supporting strut 14.Particularly, the terminal of guardrail beam 102 and guardrail beam 102 illustrates in Fig. 4 A, Fig. 4 B in more detail, and describes hereinafter.

Guardrail beam 102 is attached to supporting strut 104 by connector, and these connectors can comprise the sunk screw of fluting in specific embodiment, and for example 16mm (5/8 inch) diameter multiply by the machine screw of rising as high as the banks of 38mm (1 and 1/2 inch) length.Can use larger sized guardrail nut at the back side of supporting strut 104.Supporting strut can embed in the ground, in the cement ground or in the metal slot.Supporting strut 104 can be made by any combination of timber, metal, plastics, composite material or these or other suitable material.Can expect that also each supporting strut 104 in the fence sytsem 100 not necessarily will or comprise identical architectural feature by the identical materials manufacturing.In addition, the cross section of supporting strut 104 can be to be designed to be suitable for the arbitrary shape that guardrail beam 102 supported in the mode that can relax.These cross sectional shapes can include but not limited to square, rectangle, circle, ellipse, trapezoidal, solid, hollow, closed or open wide.

Fence sytsem 100 is used for preventing that the vehicle of drift (errant) from leaving highway during bump or other harm states.In many cases, guardrail 100 is installed between speedway and the remarkable harm (for example another highway, bridge, cliff etc.) for vehicle.Therefore, fence sytsem 100 should be designed to tolerate the remarkable bump that comes from the direction vertical with the highway cardinal principle and lose efficacy hardly.This intensity makes the fence sytsem 100 can withstand shock, and still vehicle is redirected, and makes it once more substantially along the highway direction running.

But test and experiment show constantly: in fact fence sytsem may introduce other harm for highway and peripheral region.Especially true for following situation: near the terminal part of fence sytsem, along striking fence sytsem with the substantially parallel direction of highway.For example, if fence sytsem is rigidly fixed to the position in impact event, then may vehicle, its driver and the passenger of drift be caused serious injury and destroy.Therefore, having made many trials makes this additional risk as far as possible little.These methods comprise substantially uses following terminal part: these terminal parts upwards are tapered from ground, so that the bump of central collision reduces effectively, and produce the effect that is similar to the inclined-plane so that vehicle flies out in impact event.Additive method comprises U.S. Patent No. 6,398, disclosed disengaged cable terminations (BCT), vehicle decay terminal (VAT), the terminal measure of SENTRE, disengaged end (BET) and disengaged supporting strut in 192 (" ' 192 patents ").The terminal of many these classes, support member, terminal measure etc. can have been bought from different tissues.The HBA pillar that is provided by Exodyne Technologies and Trinity Industries is provided its example, and with ' 192 patent in the pillar described structurally similarly break away from the number supporting strut.

With reference to figure 1 and Fig. 2, fence sytsem 100 comprises a terminal pillar 106 and seven supporting struts 104 again.This structure has together formed the terminal part 108 of fence sytsem 100.As shown in the figure, terminal part 108 is used as the end that is used for conventional guard rail assembly 100 in a kind of preferred embodiment.

Although Fig. 1 illustrates some sizes and shows a kind of exemplary embodiment, should be understood that these sizes of fence sytsem 100 can change according to the character of the roadside harm that will block.As shown in the figure, each terminal part 108 has the length of about 35 feet magnitudes.But the size of terminal part 108 can change as required.In addition, the Len req of this system part can have the desired any convenient length of Highway Conditions.

Illustrate best as Fig. 1, terminal part 108 can be parallel to highway and install, and perhaps departs from certain angle and installs from highway.In addition, although the terminal part 108 of an end of this guardrail security system can abduction, in certain embodiments, the guardrail part 108 at this system opposite ends place is abduction not.For example, in the embodiment shown in fig. 1, upstream end part 108 is abductions, and downstream terminal part 108 abduction not.Particularly, from the highway abduction, and downstream terminal part 108 keeps being parallel to substantially highway to upstream end part 108 in linear substantially mode.In other embodiments, two terminal parts 108 can be in a similar manner all abduction or abduction not.It will also be appreciated that in addition other are configured to terminal part 108.For example, the one or both in the terminal part 108 can be mounted in the parabola mode from the highway abduction.The parabola abduction can realize by following manner: along with terminal part upstream advances, the skew of each supporting strut increases in the mode of parabola progression substantially.Comprising under the situation of this feature, one or more terminal parts 108 are positioned to the mode that departs from from highway abduction or inclination, can allow terminal part 108 execution control functions by being convenient to make the vehicle that bump takes place when advancing, move to opposite that side of this guardrail with highway.

In the specific embodiment of terminal part 108 with the linear mode abduction, terminal part 108 can go back from the nonterminal part abduction of guardrail with the angle of about 6 to 7 degree.In a kind of specific embodiment, when the supporting strut 104 of terminal part 108 was opened with about 75 inches intervals, the downstream pillar 104 of terminal part 108 can be from about 9 inches of the tangent offset of the nonterminal part of guardrail.In this embodiment, advance towards the upstream termination of terminal part 108, next four continuous supporting struts 104 can be from 19,29.25,39 and 48 inches of the tangent offsets of the nonterminal part of guardrail.In described this embodiment, terminal pillar 106 can be under the guardrail beam 102, can be from about 47 inches of the tangent offset of the nonterminal of guardrail part.

Illustrate better as Fig. 2, terminal part 108 comprises terminal measure 110.Terminal measure 110 comprises planarization chute (chute) 112 and preceding shock plate 114.Particularly, terminal measure 110 and planarization chute 112 are installed on first pillar 104 by securing member (for example screw).The purpose of terminal measure 110 is that the Impact energy of vehicle is dissipated, and does not produce unsafe conditions, and these unsafe conditionss for example cause vehicle to topple or make guardrail 102 can sting the crew department of vehicle or vehicle as lance.

Guardrail beam element 102 downstream at planarization chute 112 flow in the inlet 116.Guardrail beam element 102 is arranged in the planarization chute 112, and the length of planarization chute 112 is extended.Guardrail beam element 102 upstream extremities at planarization chute 112 leave outlet 118.As hereinafter describing in detail with reference to figure 3, the size of planarization chute 112 makes the terminal part of guardrail beam 102 be tapered earthward.That part of in the vertical direction that guardrail beam element 102 leaves outlet 118 is subjected to planarization, makes the terminal part of guardrail beam element 102 be similar to piling up of four flat boards.

Terminal pillar 106 is fastened to ground with the terminal of guardrail beam element 102, and makes guardrail beam element 102 be in tensioning state.Fig. 8 A, Fig. 8 B and Figure 10 A, Figure 10 B describe in more detail below with reference to, guardrail beam element 102 is connected to terminal pillar 106 makes guardrail beam element 102 to keep being fastened to terminal pillar 106 with tensioning state after enemy's bump or break-in bump of the vehicle that leaves highway.But, to the influential parts of the connection of this tensioning mode make when this system near terminal when oppositely being subjected to clashing into, the tension force in the guardrail beam element 102 can be relaxed.Make the tension recovery in the guardrail element prevent vehicle unstability and excessively deceleration for reverse bump.

Fig. 3 illustrates the exemplary embodiment of terminal measure 110 in more detail.As mentioned above, terminal measure 110 comprises planarization chute 112 and preceding shock plate 114.Planarization chute 112 and preceding shock plate 114 are connected to extruder 120.Extruder 120 surrounds the upstream portion of guardrail beam parts 102, and is made up of the U-shaped raceway groove parts 122 on top and the U-shaped raceway groove parts 124 of bottom, and these parts are tightened together in the mode that is spaced apart from each other by bar band plate 126.

Vertical distance between the channel floor 122 and 124 is suitable distance, is adapted such that guardrail beam 102 is inserted in the raceway groove that is produced by extruder 120.For example, in specific embodiment, comprise that at guardrail beam 102 distance between the bottom of the top of raceway groove parts 122 and raceway groove 124 can be about 14 inches under the situation of No. 12 W beam hurdle elements with about 12.25 inches vertical sizes.

Preceding shock plate 114 is fastened to the extruder 120 of terminal measure 110 by welding.In specific embodiment, preceding shock plate 114 can in the vertical direction be elongated.Like this, preceding shock plate 114 can all extend in extruder 120 above and belows, so that preceding shock plate 114 can either easily engage (engage) with the higher bumper of truck, SUV and other tall vehicle in the bump of positive mode, can engage with lower position bumper again than car.Before shock plate 114 also be oriented to engage with vehicle frame or rocker (rocker panel), vehicle charges into situation when striking the upstream extremity of terminal measure 110 to reduce vehicle in the side mode.

In specific embodiment, the planarization part 112 that is installed to extruder 120 can be made of four metal sheets.These four metal sheets can be cut and/or bend, and weld together then to form required structure.Perhaps, planarization part 112 also can perhaps be formed by a slice metal that is cut and is bent into required structure by forming more than four.When planarization part 112 was assembled, planarization part 112 can form enclosed construction, and this structure has been held the terminal part of guardrail 102.

In an illustrated embodiment, planarization part 112 comprises three sections.The downstream part of planarization part 112 comprises throat 128.The vertical size of throat 128 is bigger in downstream, and along with it reduces near the upstream extremity of terminal measure 110.For example, in specific embodiment, the vertical size of throat 128 can be in downstream about 14 inches wide and at upstream extremity about 4.5 inches wide.The horizontal length of throat 128 can be in about 11 to 13 inches scopes.

In specific embodiment, the gradient of lower limb 132 can be greater than top edge 130.Make the gradient increase of lower limb 132 can in knockout process, help to make 102 planarizations of guardrail beam.For example, in specific embodiment, top edge 130 can with respect to the horizontal plane be inclined upwardly with about 11 angles of spending, and lower limb 132 can be with respect to the horizontal plane downward-sloping with the angles of about 13 degree.In other embodiment, the gradient of top edge 130 and lower limb 132 can be identical substantially.Like this, in specific embodiment, top edge 130 and lower limb 132 can the mirror images of each other symmetries.In other embodiments, one in top edge 130 and the lower limb 132 can be aimed at (parallel with highway substantially) with horizontal plane, and another person in top edge 130 and the lower limb 132 tilts respectively up or down.

Mid portion 134 extends from the upstream extremity of throat 128, and towards ground inclination.Particularly, mid portion 134 is configured to guardrail beam element 102 is carried out the transition to subaerial height from the height (being 31 inches a kind of specific embodiment) that is suitable for vehicle impact is redirected, be above the ground level level.Like this, the vertical distance that is associated with throat 128 from downstream end of mid portion 134 extends to roughly ground level of upstream extremity.In specific embodiment, be about at the horizontal length of mid portion 134 under 18.75 inches the situation, mid portion can be with respect to the horizontal plane tilts with the angles of 38 degree roughly.

Mid portion 134 also provides raceway groove, and the terminal part of guardrail element 102 is arranged through this raceway groove.In specific embodiment, the vertical size of the raceway groove in the mid portion 134 can be about 4.5 inches (being similar to the width of throat 128 at the upstream extremity place).The size of the raceway groove in the mid portion 134 can keep constant substantially, makes that the vertical size of the raceway groove of vertical size in downstream end and mid portion 134 of the raceway groove in the mid portion 134 is basic identical at the upstream extremity place.

The third part of planarization part 112 comprises exit portion 136.Exit portion 136 is extended from the upstream extremity of middle part 134.Exit portion 136 is arranged near the ground, and aims at substantially with ground.Exit portion 136 also forms raceway groove, and the terminal of guardrail beam element 102 is left planarization chute 112 through this raceway groove.In specific embodiment, the vertical size of the raceway groove in the exit portion 136 can be about 4.5 inches (similar with the vertical size of raceway groove in the mid portion 134).The size of the raceway groove in the exit portion 136 can keep constant substantially, makes that the vertical size of upstream extremity place raceway groove of the vertical size of downstream end raceway groove of exit portion 136 and exit portion 136 is basic identical.In specific embodiment, the horizontal length of exit portion 136 can be about the 5-7 inch.

Described in conjunction with Fig. 2 as mentioned, guardrail beam parts 102 are arranged in the planarization part 112 and through its whole length and extend.Particularly, guardrail beam parts are sent in the inlet 116 in the downstream end of planarization chute 112.Guardrail beam element 112 is crossed over the length of planarization chutes 112, and leaves outlet 118 at the upstream extremity place of planarization chute 112.Like this, the terminal of W beam guardrail element is extended through this plat structure.Mid portion 134 the slope of updrift side towards ground make guardrail beam element 112 on the length of planarization part 112 gradually to the landing ground transition.After leaving outlet 118, guardrail beam element 102 is secured to the terminal pillar 106 that is in ground level.

In the head on collision or inclination head on collision process of vehicle and preceding shock plate 114, terminal measure 110 can be shifted at downstream direction, and the downstream part of guardrail beam element 102 can be forced in the terminal measure 110 that displacement takes place.In such collision process, extruder 120 is directed to guardrail beam element in the planarization part 112 as guide.Extruder 120 comprises guide 138, and these guides 138 have prevented in the collision process along with extruder 120 moves and by the terminal scraping W beam guardrail element 102 of extruder 120 along the length of guardrail beam element 102.These guides 138 can adapt to any irregular place or the bulge in the guardrail beam element 102, to guarantee that guardrail beam element 102 is sent in the planarization part 112 rightly.

Along with terminal measure 110 is moved and the downstream part of guardrail beam element 102 is forced into planarization part 112 along guardrail beam element 102, guardrail beam element 102 is flattened at vertical direction.Various piece guardrail beam element 102, that leave from the outlet 118 of planarization part 112 is flattened, and to become the plate that looks like four vertical stackings such.For example, be about under the situation that 12.25 inches, the throat 134 of planarization part 112 are about 4.5 inches in the vertical size of guardrail beam element 102, the vertical size of the planarization part of guardrail beam element 102 can be less than about 4.5 inches.Along with the generation of this planarization process, lot of energy is dissipated, and the vehicle that bump takes place is slowed down.

In order to help guardrail beam element 102 original flatization to be connected to terminal supporting strut 106, the terminal of guardrail beam element 102 can be modified.Fig. 4 A and Fig. 4 B illustrate the guardrail beam element of revising according to a kind of embodiment 200.Shown in Fig. 4 A, guardrail beam element 200 comprises slot area 202 at the upstream extremity of the terminal part of guardrail beam element 200.In specific embodiment, slot area 202 comprises series of grooves, and these grooves are longitudinally arranged in guardrail beam element 200.In the guardrail test model of constructing similarly with guardrail security system 100, proved that it is effective using three grooves.

Slot area 202 can start from terminal 203 places of guardrail beam element 200, and extends required distance downstream.The horizontal length of slot area 202 can change according to the horizontal length of terminal measure 110.May wish that slot area 202 comprises that part of guardrail beam element 200 that is connected to terminal pillar 106 and that part of guardrail beam element 200 that crosses planarization part 112.Substantially, slot area 202 can extend to certain distance between first, second supporting strut 104 from the upstream end of guardrail beam element 200.For example under the size and the similar situation of size shown in Figure 1 of the terminal part 108 of fence sytsem 100, slot area 202 can be extended about 80-85 inch from the terminal of guardrail beam element 200.

With reference to the cross section of typical W beam guardrail 200 shown in the figure 4B, can understand layout better according to groove in the slot area 202 of specific embodiment.Low ebb 204 and is formed at the intersection of inclination wet end 208 between peak 206 up and down.Edge member 210 is positioned at outside each peak 206 in the horizontal.For these grooves, layout very preferably is to press close to each peak 206 and low ebb 204.Like this, in the embodiment shown in Fig. 4 A, first and second grooves 212 are arranged in first and second peaks 206.Three-flute 214 is arranged in the low ebb 204.

The ability that groove 212 and 214 size should be enough to make the terminal of guardrail beam element 200 to be flattened is strengthened.In a kind of preferred embodiment, the whole vertical size of each peak 204 and low ebb 204 can be removed.Have been found that the effective size in the vertical direction for groove 212 is about 0.5 inch.Have been found that the effective size in the vertical direction for groove 214 is about 0.75 inch.Like this, in specific embodiment, groove 212 can have the width of 0.5 inch magnitude and extend about 81-82 inch, groove 214 and can have the width of 0.75 inch magnitude more and extend about 81-82 inch.But these sizes that provided only are the example purposes.Use virtually any sizes can for

groove

212 and 214, the ability that makes guardrail beam 200 in the whole terminal of guardrail beam element 200 be flattened to the plate of four vertical stackings is strengthened.

Although guardrail beam 102 can comprise W beam hurdle element, can expect usually that shown guardrail beam 102 only is the example of operable beam in the fence sytsem.Other structure members that the various piece of guardrail beam 102 or guardrail beam 102 can comprise traditional W beam guardrail, three ripple guardrails, box-girder, cable wire or be suitable for when bumping the vehicle that drifts about being redirected.It will also be appreciated that the structure and the size of any said elements in the fence sytsem 100 can change as required.

Get back to Fig. 1 and Fig. 2, after vehicle and terminal measure 110 initial enemy's bump and the initial displacement of terminal measure 110 on downstream direction, the vehicle of bump and terminal measure 110 may be joined with one or more supporting struts 104.Being included in the supporting strut 104 that is clashed under the situation of ground place's surrender that be modified, steel (yielding) supporting strut at these supporting struts 104 can unclamp guardrail beam element 102 when being subjected to bump and bending earthward.Like this, in certain embodiments, the supporting strut 104 that is clashed in collision process can be shifted, and makes them can not work the mischief to the vehicle that bump takes place.Although guardrail beam 102 can unclamp from the supporting strut 104 that is clashed into, guardrail beam element 102 parts that downstream, bump place takes place can keep its initial position substantially with respect to ground.In addition, because guardrail beam 102 remains connected to terminal pillar 106 in enemy's bump or break-in knockout process, so guardrail beam 102 remains in tensioning state.This has enlarged the guardrail security system and has had the scope of acceptable energy.

When fence sytsem 100 was subjected to the break-in bump in the Len req part at fence sytsem 100, the tension force in the guardrail beam 102 also can keep in this way.For example, when the vehicle impact of parallel direction running is left highway and is clashed into fence sytsem 100 substantially along the downstream direction with fence sytsem 100, the any supporting strut 104 that is subjected to Vehicular impact can work when being subjected to clashing into, and guardrail beam element 102 is unclamped.The supporting strut of revising 104 can bend earthward, makes this supporting strut be shifted, and the vehicle that clashes into is not worked the mischief.Owing to kept tension force in the fence sytsem 102, so even at one or more supporting struts after guardrail beam element 102 unclamps, guardrail beam element 102 also continues to work so that vehicle is redirected back on the highway.

Fig. 5 A-5C, 6A-6C and 7A-7C illustrate the exemplary embodiment of the supporting strut that can be used in combination with the fence sytsem 100 of Fig. 1.Particularly, Fig. 5 A-5C illustrates exemplary reduction supporting strut, and this pillar can be used as first supporting strut 500 (after terminal supporting strut 106) in the terminal part 108 of guardrail security system 100.Fig. 6 A-6C illustrates exemplary reduction supporting strut 600, and this pillar can use in the whole terminal part 108 of guardrail security system 100 and other parts.Fig. 7 A-7C illustrates standard circuit pillar 700, and this pillar can use in some part of guardrail security system 100.Although Fig. 5 is A-5C, 6A-6C and 7A-7C illustrate three kinds of distinguishing embodiment respectively, adopted identical label to identify public parts among these three kinds of embodiment.

As shown in the figure, supporting strut 500,600 and 700 comprises elongated continuous structure parts, and is respectively the flange configuration of normal width.Each supporting strut comprises two flanges 502, and these flanges are parallel substantially each other, and relative to each other spaced apart.Junction plate (web) 504 forms connection between flange 502.In a preferred embodiment, flange 502 comprises identical substantially screw 506 and excision district 508 structures therein.

For the wide flange shape as the guardrail pillar, the cross section is formed the shape that is similar to letter " H " usually.This cross section has two major axis and is used for bending." weak " axis is often referred to and passes junction plate and extend and vertical with these flanges central axis." by force " axis be often referred to perpendicular to junction plate and with the parallel plane central axis of flange.For the conventional mounting facility of guardrail, weak axis is lateral connecting line and extending substantially.Strong axis extends along road substantially.

In the embodiment shown in Fig. 5 A-5C, 6A-6C and the 7A-7C, wide flange is the W6 of standard * 8.5, and it is common to the supporting strut manufacturing of guardrail installation.It is dark that the wide flange in the W6 of standard * 8.5 can have six inches of nominal, and every foot weight is eight and half.In fact, an advantage of the invention is existing standard device to be used for again making, to revise and installation supporting strut 500, and mustn't revise significantly equipment.Those skilled in the art can expect, can use the wide flanged beam of many different sizes.For example, also can use six inches dark, per inch to weigh nine and half this wide flange of wide flange and be called the wide flange in W6 * 9.But the wide flange of wide flange in W6 * 9 and W6 * 8.5 is considered to be equal in transaction.The meaning of term " the wide flange in W6 * 8.5 " and " the wide flange in W6 * 9 " is meant that those skilled in the art can be called the overall dimension and the structure of the guardrail pillar of " W6 * 9 ".In addition, it will be understood by those skilled in the art that other titles that are used for wide flange include but not limited to " I beam ", " H beam ", " W beam ", " S beam ", " M beam ", that is, can replace " beam " with term " shape ".

In specific embodiment, supporting strut 500,600 and 700 has the length in about 72 to 73 and 3/8 inches scopes, and comprises top 510 and bottom 512.Middle part 514 couples together top 510 and bottom 512.Top 510 comprises two screws 506, and they are suitable for holding connector so that guardrail beam (for example the guardrail beam 102) is installed on this supporting strut.Bottom 512 is suitable for being installed in below the slope, road (grade), as the part of guardrail support system.

Screw 506 comprises standard construction, and this structure can be installed in widely used guardrail beam on the corresponding supporting strut.Substantially, the centrally aligned of screw 506 and guardrail beam, and the center of guardrail beam maintained more than the ground about 30 inches.But within the scope of the invention, the number of screw 506, size, position and structure can be made amendment to a great extent.

Supporting

strut

500 and 600 is modified separately to comprise " weak " the axis W and the axis S of " by force ".Supporting

strut

500 and 600 is under normal circumstances installed along road, make weak axis W substantially perpendicular to magnitude of traffic flow direction, and strong axis S is parallel to magnitude of traffic flow direction substantially.Therefore, supporting

strut

500 and 600 can tolerate remarkable bump for strong axis S (for example with the automobile of running at high speed bump) usually and can obviously not lose efficacy.But supporting

strut

500 and 600 is designed so that wittingly in response to for the bump of weak axis W and more easily lost efficacy.In other words, supporting

strut

500 and 600 shows enough intensity in the horizontal, and shows enough low intensity in the vertical.Therefore, if vehicle strikes terminal measure 110 in " end " mode, then supporting

strut

500 and 600 is area failures (for example warpage), make simultaneously vehicle can along with its to the bump of follow-up supporting strut and slow down.But if vehicle also impacts fence sytsem 100 along the surface of guardrail beam 102 with it angledly, then supporting

strut

500 and 600 will provide enough resistances (intensity), and vehicle is redirected to along the path parallel substantially with guardrail beam 102.

Supporting

strut

500 and 600 mid portion 514 comprise two excision districts 508, and these excision districts are constructed such that supporting strut further weakens about weak axis W, thereby more easily owing to vehicle bump in the direction lost efficacy.Excision district 508 is positioned at mid portion 514, so that supporting strut is about the contiguous weak axis W reduction in (when being mounted) and ground.The supporting strut that can adapt to so roughly at the place, ground lost efficacy, make supporting

strut

500 and 600 can make progress from failpoint " folding " go back.Because bottom 512 is at below ground, so in knockout process, expect that the bottom 512 of ground or supporting strut can be obviously not crooked.

In an illustrated embodiment, because excision district 508 is created in roughly place, ground wittingly, the center of screw 506 is created in 30 inches places more than the ground wittingly, so screw 506 results from 30 inches places, 508 tops, excision district.It will be understood by those skilled in the art that within the scope of the invention size, structure, position and number and their relations each other in screw, excision district can be revised to a great extent.Within the scope of the invention, overall length these supporting struts and their top, bottom and mid portions separately also can be revised to a great extent.For example, in other embodiments, excision district 508 can result from below ground or the top.The degree of depth in excision district 508 below ground should be no more than following amount: described amount can hinder supporting strut and lose efficacy near the position in position of excising district 508 or excision district 508.At certain degree of depth place below ground, soil on every side (or other) material can be enhanced to the bottom 512 of supporting strut the degree that can not allow that this inefficacy takes place.

Excision district 508 height of side on the ground should not surpass following point: at described some place, supporting strut will lose efficacy at 508 places, excision district, and the side stays " broken end " on the ground, and this " broken end " may tangle vehicle and otherwise cause excessive injury and/or excessive destruction.For the redirected effect of the fence sytsem at supporting strut work place, this broken end may be harmful to.

The vertical size in excision district 508 is to limit according to the horizontal dimension of excising district 508.For example, the ratio of the vertical size in any specific excision district can be equal to or less than three times of horizontal dimension.Perhaps, this ratio can be limited in the twice of horizontal dimension.In an illustrated embodiment, this ratio is 1: 1, because excision district 508 is the circular open in the supporting strut substantially.The vertical size in excision district is more little, and the designer just can get over and accurately stipulate the vertical length of failpoint along supporting

strut

500 and 600.

According to instruction of the present invention, for the designer of supporting

strut

500 and 600, the structure in various excisions district 508 can be arranged.For example, excision district 508 can not be a circular open, but comprises square, rectangle, triangle, oval west, rhombus or in fact any other geometrical construction, and still obtains the part or all of advantage described in the application.

Within the scope of the invention, the horizontal direction of excision district 508 in flange 502 also can change significantly.In the embodiment shown in Fig. 5 A-5C and Fig. 6 A-6C, about one inch away from center line of flange 508 of the position of center line in excision district 508 be.But in alternative embodiment, the position in excision district 508 can be nearer from these edges, and is perhaps farther from these edges.In one embodiment, excision 508 can be constructed such that they extend to the edge of flange always, disconnects thereby exist the material that begins from the edge.Like this, can adopt traditional drift to form to extend to the semicircle opening of flange edge in edge.

Perhaps, also can adopt from the outward flange of flange and begin and the sawing mode that extends internally forms excision district 508.Like this, sawing mode will form the starting point of possibility failpoint along the weak axis of supporting strut.Except sawing, similarly structure also can comprise groove, and the longest yardstick in the groove passes through flange and horizontal-extending.Such groove can begin or end at the edge of flange, perhaps otherwise is arranged in the flange material fully.

As mentioned above, Fig. 5 A-5C specifically illustrates the guardrail supporting strut 500 that can be used as first supporting strut (after terminal supporting strut 106) in fence sytsem 100.After terminal measure (for example terminal measure 110) was covered guardrail security system 100, supporting strut can be modified with support tip measure 110.Particularly, supporting strut 500 comprises

additional screw

520 and 522, is used for terminal measure 110 is connected to supporting strut 500.In concrete illustrated embodiment,

screw

520 and 522 is slightly less than screw 506 and excision district 508.But should be understood that the screw 520 that provided and 522 size are the example purpose, and can change as required so that terminal measure 110 is connected to supporting strut 500.Therefore different with supporting strut 500, supporting

strut

600 and 700 does not comprise

screw

520 and 522, is more suitable for being used in the part that terminal measure 110 is not directly supported of fence sytsem 100.

Although above describe and in the manual illustrated the wide flanges in W6 * 8.5, it will be appreciated by those skilled in the art that, can be as mentioned above the guardrail supporting strut of virtually any size be in fact weakened.The Several Factors that will consider when the size of supporting strut, weight and structure are just determined to excise the correct position in district is allowing when strong axis is kept sufficient intensity along weak axis surrender with permission, thereby the vehicle that clashes into is being redirected.In addition, comprise the supporting strut (for

example supporting strut

500 and 600 of Fig. 5 A-5C) of reduction although may wish at least a portion of these supporting struts in the guardrail security system 100, but supporting strut also can comprise the supporting strut of traditional unmodified, other structure members that perhaps are suitable for the guardrail beam is supported.Fig. 7 A-7C illustrates the supporting strut of such unmodified.Supporting strut 700 does not comprise excision district 508, and can comprise the linear pillar (for example W6 of unmodified * 8.5 pillars) of standard or have any other supporting strut of suitable dimension, weight and structure.

Although when some supporting strut can be formed at Vehicular impact guardrail beam element is unclamped, after enemy's bump or break-in bump, also remain connected to the guardrail beam even may wish the terminal supporting strut.Fig. 8 A and Fig. 8 B illustrate the exemplary embodiment of the terminal supporting strut 800 that can use in conjunction with the fence sytsem 100 of Fig. 1.With reference to figure 1, terminal supporting strut 800 is the first terminal supporting struts at terminal part 108 upstream extremity places.Fig. 8 A is the lateral view of terminal supporting strut 800, and Fig. 8 B is the elevation of same terminal supporting strut 800.

In specific embodiment, terminal supporting strut 800 is releasably attachable to guardrail beam 102 (for example the guardrail beam 102), and actual grappling is provided for guardrail beam 102, so that the tensile load on the guardrail beam 102 is reacted, be redirected along the length direction of guardrail beam 102 vehicle to horizontal bump.Used various elements to realize guardrail beam 102 is connected to terminal pillar 800, made that guardrail beam 102 remains connected to terminal supporting strut 800 when fence sytsem 100 is subjected to impact that vehicle impact carries out with enemy bump or break-in types of impacts.Like this, even guardrail beam element also keeps being supported with tensioning state after such bump.But when fence sytsem 100 was subjected to vehicle impact along reciprocal impact, the tensioning connected mode of guardrail beam 102 will be unclamped from terminal supporting strut 800, to prevent vehicle unstability and excessive vehicle deceleration.

In an illustrated embodiment, terminal supporting strut 800 comprises the structure member 802 of I beam construction.Structure member 802 comprises the pair of flanges 804 that is connected by center connecting plate 806.In presently preferred embodiment, beam parts 802 comprise W6 * 15 steel strut parts.A pair of rectangular side panels 808 is fixed to the two opposite sides of structure member 802.Preferably, side plate 808 is fastened to each flange 804 by welding.

Connector assembly is used to structure member 802 is connected to guardrail beam element.Keep being connected between the terminal part of this structure member and guardrail beam in enemy that connector assembly is constructed such that at vehicle bump or the break-in knockout process.But this connector assembly is formed at and unclamps this connection in the reverse knockout process.In specific embodiment, connector assembly comprises a plurality of rectangular slabs that pile up, and these rectangular slabs are by the terminal part of degree standard with the admittance fence sytsem.For example, connector assembly can comprise piling up of three plates: flange plate 810, retainer plate 816 and washer plate 824.

Flange plate 810 is fastened between the side plate 808.Flange plate 810 is preferably integrally formed, is fastened to structure member 802 and each side plate 808 by welding manner.Flange plate 810 (illustrated best as Fig. 9 A) comprises rectangular slab, and this rectangular slab has V-arrangement excision district 812 in the center of the top edge 813 of flange plate 810.In an illustrated embodiment, flange plate 810 has about 5 inches length and about 6 inches width.The thickness of flange plate 810 (illustrated best as Fig. 8 B) can be about 1 inch.

The center of V-shaped groove 812 is along the horizontal width of flange plate 810, and vertically length is about 1 inch, about 1 and 3/4 inch of horizontal width.But, described and shown in flange plate 810 sizes only be for the example purpose.Although it is suitable that shown size may comprise under the situation of W6 * 15 steel strut parts at structure member 802, the size of flange plate 810 can change, and can depend on the size and the scale of structure member 802.

Get back to Fig. 8 B, it is adjacent with flange plate 810 that retainer plate 816 is arranged to.Similar with flange plate 810, retainer plate 816 is preferably integrally formed.Illustrated best as Fig. 9 B, retainer plate 816 comprises the rectangular slab with circular open 818, the top edge 820 of the contiguous retainer plate 816 of this opening.In an illustrated embodiment, retainer plate 816 has about 3 not only 1/8 inch vertical length and about 5 but also 3/8 inches horizontal widths.The center of opening 818 is along the horizontal width of retainer plate 816, and the center is from the top edge of retainer plate 816 820 about 7/8 inch.U-shaped opening 818 can have about 1 and 1/4 inch diameter.But, described and shown in retainer plate 816 sizes only be for the example purpose.Although it is suitable that shown size may comprise under the situation of W6 * 15 steel strut parts at structure member 802, the size of retainer plate 816 can change, and can depend on the size and the scale of structure member 802 and flange plate 810.

Get back to Fig. 8 B, it is adjacent with retainer plate 816 that washer plate 824 is arranged to.Similar with flange plate 810 and retainer plate 816, washer plate 824 is preferably integrally formed.Illustrated best as Fig. 9 C, washer plate 824 comprises the rectangular slab with U-lag 826, and this U-lag is in the center of the top edge 828 of washer plate 824.In an illustrated embodiment, washer plate 824 has about 4 not only 1/8 inch vertical length and about 5 but also 1/2 inches horizontal widths.Illustrated best as Fig. 8 B, the thickness of washer plate 824 can be about 1/2 inch.

The center of U-lag 826 is along the horizontal width of washer plate 824, and has about 1 not only 1/4 inch vertical length and about 1 but also 1/8 inch horizontal width.The groove 826 that the bottom is fillet has about 1 and 1/4 inch diameter.But, described and shown in washer plate 824 sizes only be for the example purpose.Although it is suitable that shown size may comprise under the situation of W6 * 15 steel strut parts at structure member 802, the size of washer plate 824 can change, and can depend on the size and the scale of structure member 802.

Flange plate 810, retainer plate 816 and washer plate 824 comprise a pair of screw 830 separately.In an illustrated embodiment, the diameter of screw 830 is about 3/8 inch.When being assembled together, flange plate 810, retainer plate 816 and washer plate 824 screw 830 separately is aligned with each other substantially.Pair of screws 832 can be passed screw 830 and be fastening, thereby flange plate 810, retainer plate 816 and washer plate 824 are tightened together.Packing ring 834 can be screwed to the end of each screw 832 with engage thread, thereby these plates relative to each other are clamped together.

As mentioned above, the purpose of terminal supporting strut 800 is that guardrail beam 108 is fastened on tensioning state.Figure 10 A and Figure 10 B illustrate exemplarily guardrail beam 1000 are connected to terminal supporting strut (for example terminal supporting strut 800 shown in Fig. 8 A and the 8B) with tensioning state.Particularly, the fluting guardrail beam 1000 of pressurized is connected to junction plate 1002, and guardrail beam 1000 is similar to above in conjunction with Fig. 1, Fig. 2 and described those guardrail beams of Fig. 4 A-4B.

In an illustrated embodiment, junction plate 1002 comprises a pair of screw 1004, and these screws can be aimed at a pair of similar screw (not shown) that pressurized is slotted in the terminal of guardrail beam 1000.Pair of screws 1006 can be passed the similar size screw (not shown) of aiming at screw 1004 in screw 1004 and the guardrail beam 1000 and is screwed into.The screw 1006 that nut 1008 can guarantee to pass junction plate 1002 and guardrail beam 1000 being connected separately.In specific embodiment, the diameter that the screw in screw 1004 and the guardrail beam 1000 can have about 7/8 inch magnitude.In such embodiments, screw 1006 can comprise 2 and 1/2 * 3/4 " the GR.5 screw.But be understood that these sizes only provide as example.Can use the screw and the screw of any suitable dimension that guardrail beam 1000 is fastened to junction plate 1002.

Junction plate 1002 is connected to threaded rod 1010.In specific embodiment, threaded rod 1010 can be soldered to junction plate 1002.Illustrate best as Fig. 8 B, threaded rod 1010 passes the U-shaped excision district 826 of the circular open 818 of V-arrangement excision district 814, retainer plate 816 of flange plate 810 and washer plate 824 and is screwed into.Nut 836 is screwed onto the end of threaded rod 1010, so that guardrail beam 1000 is fastened to terminal supporting strut 800 with tensioning state.

The existence of nut 836 has prevented cable 1010 from the opening withdrawal, and these openings are to distinguish 826 by the U-shaped excision of the V-arrangement excision district 814 of flange plate 810 and washer plate 824 to form.Because the opening of retainer plate 816 comprises the excision district of opening wide in the edge of the circular open 818 of sealing rather than retainer plate 816, so that retainer plate 816 has been guaranteed threaded rod 1010 is on the throne suitably.Retainer plate 816 is returned threaded rod 1010 connects increase to the tensioning state of terminal pillar 800 intensity.Washer plate 824 has also increased intensity to this connection as the packing ring between screw 834 and the retainer plate 816.

In enemy's bump that the fence sytsem that comprises above-mentioned feature is carried out or break-in knockout process, Fig. 8 A-8B, Fig. 9 A-9C make guardrail beam 1010 be connected and can be kept perfectly with the tensioning of terminal supporting strut 800 with the described assembly of Figure 10 A-10B.Because guardrail beam 1010 remains on tensioning state, so guardrail beam 1010 can be redirected vehicle impact.Can eliminate the post warpage of this system, and the vehicle of eccentric bump can be stayed in moderating process in this system longer.

On the contrary, when this fence sytsem was oppositely clashed in the vehicle edge, the tensioning connection status of guardrail beam 1010 can be released.For example, oppositely bump can make top edge 820 directly over the circular open 818, retainer plate 816 be subjected to shearing (shear).Like this, threaded rod 1010 breaks away from from the opening that is formed by V-arrangement excision district 812, U-shaped excision district 826 and circular open 818.Because the tensioning connection status of guardrail beam 1000 is released, thus guardrail beam 1000 can disintegrate with controlled manner, to prevent the vehicle unstability or excessively to slow down.

For oppositely further helping to unclamp this tensioning connection status in the knockout process, can the terminal supporting strut be connected to the first adjacent supporting strut with the pole (strut) of revising.Such pole is represented by label 140 in Fig. 2, and is illustrated in more detail in Figure 11 A and Figure 11 B.In an illustrated embodiment, pole 140 comprises longitudinal beam parts 1112, and these parts are modified to comprise pole plate 1114.Longitudinal beam parts 1112 can comprise any suitable cross sectional shape.The length of longitudinal beam parts 1112 is suitable for terminal supporting strut 106 is connected with adjacent next supporting strut 104.In specific embodiment, longitudinal beam parts 1112 can comprise C raceway groove parts, and these C raceway groove parts have the width of about 6 inches magnitudes and the degree of depth of about 2 inches magnitudes.

Illustrated best as Figure 11 B, pole plate 1114 is preferably integrally formed, is fastened to longitudinal beam parts 1112 by welding manner.Pole plate 1114 comprises rectangular slab, and this rectangular slab has U-shaped excision district 1116 in the center of the top edge 1118 of pole plate 1114.In an illustrated embodiment, pole plate 1114 has about 10 inches horizontal dimension and about 8 inches vertical size.The thickness of pole plate 1114 can be about 1/4 inch.The center of U-lag 1116 is along the vertical direction of pole plate 1114, and vertically size is about 1 and 1/2 inch, and horizontal dimension is about 5 and 1/2 inches.The fillet bottom 1120 of U-lag 1116 has about 1 and 1/2 inch diameter.But described and shown in the size of pole plate 1114 only provide for the example purpose.The size of pole plate 1114 and longitudinal beam parts 1112 can change.

When vehicle during along direction bump guardrail girder system system, pole 1112 and pole plate 1114 can be so that unclamp tensioning connection status between guardrail beam and the terminal supporting strut.The port of export of the contiguous planarization part 112 in the position of pole plate 1114.Pole plate 1114 is as the slope, so that be connected to the threaded rod of guardrail beam from the V-arrangement excision district 814 of flange plate 810, the opening 818 of retainer plate 816 and U-shaped excision district's 826 liftings of washer plate 824.Owing to unclamped the tensioning connection status in the guardrail beam 1000, pole 1112 and pole plate 1114 have prevented the unstability of vehicle impact or have excessively slowed down.

As mentioned above, Figure 10 A illustrates the guardrail beam with Figure 10 B and is connected situation with the exemplary tensioning of threaded rod.Figure 12 illustrates and can be used for the alternative embodiment of situation that the tensioning that the guardrail beam is connected to the terminal pillar is connected.In an illustrated embodiment, the guardrail beam 1200 of fluting can be revised similarly with the guardrail beam 200 of Fig. 4 A.The guardrail beam 1200 of fluting is modified at terminal 1202 places, and is connected to cable bar 1204.In specific embodiment, the guardrail beam 1200 of fluting can be connected to a pair of cable bar 1204.

Cable bar 1204 can cross planarization part 1206.Planarization part 1206 can be similar to the planarization part 110 of Fig. 1-Fig. 3.Therefore, at least a portion of cable bar 1204 can be crossed the length of planarization part 1206, and leaves opening 1206 at the upstream extremity place of planarization part 1206.After leaving opening 1206, cable bar 1204 can be used and above combine Fig. 8 A-8B, Fig. 9 A-9C and the described kindred organization of Figure 10 A-10B, and the place is fastened to terminal pillar 106 on ground.

The technological merit of specific embodiments of the invention comprises the terminal measure of guardrail beam, the compression of this end measure by the W beam guardrail element Impact energy that dissipated.Particularly, by making the required a part of guardrail planarization of vehicle impact deceleration, the terminal measure of guardrail can dissipate the Impact energy with the terminal vehicle that collides of guardrail.Another advantage can be that this end measure forces W beam guardrail element to pass plat structure, and this boundary is so squeeze comparatively smooth plate with guardrail.Different with system before this, this W beam guardrail element can be flattened at vertical direction rather than horizontal direction.

Additional advantage can be: be connected to the terminal supporting strut for the end with W beam guardrail element, tensioning, resistant connected mode can be provided.Can make the guardrail beam after enemy's bump or break-in bump, can keep fastening with the system element that the terminal supporting strut provides tensioning to be connected for the guardrail beam.Like this, this system can remain on tensioning state in this knockout process of two types.But another advantage can be: when system was subjected to oppositely clashing near terminal, tensioning state can be released.The tensioning state that unclamps the guardrail element for reverse bump has prevented vehicle unstability and excessively deceleration.

Although describe the present invention, it may occur to persons skilled in the art that the variations and modifications form by several embodiment.Will be understood that the present invention contained these variations and the modification that drops in the current claims scope.For example, feature mentioned above can be used with being bonded to each other individually and/or, perhaps is used in combination with other Change In Design forms.

Claims

1. the terminal measure of a guardrail security system comprises:

The terminal part of guardrail beam comprises upstream extremity and downstream, and at the upstream extremity place of the terminal part of described guardrail beam, the terminal part of described guardrail beam is not from the first vertical high inclination that is suitable for the drift vehicle is redirected to subaerial second vertically highly;

The planarization part, it forms raceway groove, and the terminal part of described guardrail beam passes described raceway groove and arranges, and the vertical size of described raceway groove is bigger at described planarization upstream end portion place at the downstream end ratio of described planarization part; With

Crash panel, it is connected to described planarization part, and described crash panel is used for engaging with vehicle impact in the end of described guardrail beam; And

Wherein, in correct knockout process, vehicle makes described crash panel and described planarization part longitudinally advance on downstream direction along described guardrail, described crash panel and described planarization part this advances and dissipated energy so that described vehicle impact is slowed down, and makes downstream part along with described guardrail beam be forced into to make the planarization of described guardrail in the vertical direction in the described planarization part.

2. terminal measure according to claim 1, wherein, described planarization partly comprises:

Throat, it holds the terminal part of described guardrail beam, than bigger at the upstream extremity place, described throat applies power to the opposite two edges of described guardrail beam to the vertical size of described raceway groove in described throat, so that the terminal part in the vertical direction planarization of described guardrail beam in downstream end;

Mid portion, it extends from described throat on updrift side, and described mid portion is configured to the terminal part of described guardrail beam is vertically highly carried out the transition to described second vertically highly from described first; And

Exit portion, it extends from described mid portion on updrift side, and the terminal part of described guardrail beam leaves described exit portion at the upstream extremity of described exit portion.

3. terminal measure according to claim 1 also comprises the extruder part, the raceway groove that described extruder passes when partly forming at least a portion of arranging the guardrail beam, and described crash panel is connected to described extruder part.

4. terminal measure according to claim 1, also comprise the terminal supporting strut, described terminal supporting strut is configured to form being connected of resistant, tensioning with the terminal part of the described guardrail beam that leaves described exit portion, in correct knockout process, being kept described resistant, being connected of tensioning between described terminal supporting strut and the described guardrail beam.

5. terminal measure according to claim 4, wherein, the upstream extremity of described guardrail beam parts is connected to threaded rod, and described threaded rod is connected to described terminal supporting strut.

6. terminal measure according to claim 1, wherein, the terminal part of described guardrail beam is arranged essentially parallel to highway.

7. terminal measure according to claim 1, wherein, the terminal part of described guardrail beam at the upstream extremity place of described guardrail beam from the highway abduction.

8. terminal measure according to claim 7, wherein, described abduction is the parabola mode substantially.

9. terminal measure according to claim 7, wherein, described abduction is linear substantially.

10. terminal measure according to claim 1, wherein, the terminal part of described guardrail beam parts comprises the W beam that has ripple in the vertical, the low ebb about described W beam has between peak and these peaks.

11. terminal measure according to claim 10, wherein, the terminal part of described guardrail beam parts is modified to comprise slot area, described slot area comprises one group of three groove, longitudinally extend in the low ebb of these grooves between described up and down peak and these peaks each, described slot area has increased the ability that the terminal part of described guardrail beam parts is flattened in correct knockout process.

12. terminal measure according to claim 11 wherein, makes the process of described guardrail in the vertical direction planarization comprise the plate that makes described guardrail be planarized into four vertical stackings.

13. terminal measure according to claim 1 wherein, makes the process of described guardrail in the vertical direction planarization comprise the plate that makes described guardrail be planarized into a plurality of vertical stackings.

14. a guardrail security system comprises:

The guardrail beam, it comprises upstream extremity and downstream, the terminal part of described guardrail beam is highly vertical to subaerial second from the first vertical high inclination that is suitable for the drift vehicle is redirected;

A plurality of supporting struts, it is installed with the contiguous highway of the mode that is spaced apart from each other, and described a plurality of supporting struts are connected to described guardrail beam; With

Terminal measure, it is releasably attachable in described a plurality of supporting strut at least one, and described terminal measure comprises:

Wherein, in correct knockout process, vehicle makes described terminal measure longitudinally advance on downstream direction along described guardrail, described terminal measure this advances and dissipated energy so that described vehicle impact is slowed down, and makes downstream part along with described guardrail beam be forced into to make the planarization of described guardrail in the vertical direction in the described planarization part.

15. guardrail security system according to claim 14, wherein, described planarization partly comprises:

16. according to the described guardrail security system of claim 41, also comprise the extruder part, the raceway groove that described extruder passes when partly forming at least a portion of arranging the guardrail beam, described crash panel is connected to described extruder part.

17. guardrail security system according to claim 14, also comprise the terminal supporting strut, described terminal supporting strut is configured to form being connected of resistant, tensioning with the terminal part of the described guardrail beam that leaves described exit portion, in correct knockout process, being kept described resistant, being connected of tensioning between described terminal supporting strut and the described guardrail beam.

18. terminal measure according to claim 17, wherein, the upstream extremity of described guardrail beam parts is connected to threaded rod, and described threaded rod is connected to described terminal supporting strut.

19. terminal measure according to claim 14, wherein, the terminal part of described guardrail beam is arranged essentially parallel to highway.

20. terminal measure according to claim 14, wherein, the terminal part of described guardrail beam at the upstream extremity place of described guardrail beam from the highway abduction.

21. terminal measure according to claim 20, wherein, described abduction is the parabola mode substantially.

22. terminal measure according to claim 20, wherein, described abduction is linear substantially.

23. terminal measure according to claim 14, wherein, the terminal part of described guardrail beam parts comprises the W beam that has ripple in the vertical, the low ebb about described W beam has between peak and these peaks.

24. terminal measure according to claim 23, wherein, the terminal part of described guardrail beam parts is modified to comprise slot area, described slot area comprises one group of three groove, longitudinally extend in the low ebb of these grooves between described up and down peak and these peaks each, described slot area has increased the ability that the terminal part of described guardrail beam parts is flattened in correct knockout process.

25. terminal measure according to claim 23 wherein, makes the process of described guardrail in the vertical direction planarization comprise the plate that makes described guardrail be planarized into a plurality of vertical stackings.

26. a guardrail security system comprises:

The guardrail beam, it comprises upstream extremity and downstream, at least a portion of described guardrail beam is positioned at first vertically highly with respect to ground, is used for the drift vehicle is redirected;

Terminal measure, it is releasably attachable in described a plurality of supporting strut at least one, the raceway groove that passes when described terminal measure forms the terminal part of arranging described guardrail beam, the vertical size of described raceway groove is bigger at the upstream extremity place of described raceway groove at the downstream end ratio of described raceway groove; And

Wherein, in correct knockout process, vehicle makes described terminal measure longitudinally advance on downstream direction along described guardrail, described terminal measure this advances and dissipated energy so that vehicle impact is slowed down, and makes the downstream part along with described guardrail beam be forced into the planarization part and make the planarization of described guardrail in the vertical direction.

27. guardrail security system according to claim 26, wherein, described terminal measure comprises:

Mid portion, it extends from described throat on updrift side, and described mid portion is configured to the terminal part of described guardrail beam is vertically highly carried out the transition to second vertically highly from first; And

28. guardrail security system according to claim 26, also comprise the terminal supporting strut, described terminal supporting strut is configured to form being connected of resistant, tensioning with the terminal part of the described guardrail beam that leaves described exit portion, in correct knockout process, being kept described resistant, being connected of tensioning between described terminal supporting strut and the described guardrail beam.

29. guardrail security system according to claim 26, wherein, the terminal part of described guardrail beam at the upstream extremity place of described guardrail beam from the highway abduction.

30. terminal measure according to claim 26, wherein, the terminal part of described guardrail beam parts comprises the W beam that has ripple in the vertical, the low ebb about described W beam has between peak and these peaks; And

The terminal part of described guardrail beam parts is modified to comprise slot area, and described slot area comprises one group of three groove, longitudinally extends in each in the low ebb of these grooves between described peak up and down and these peaks.

31. terminal measure according to claim 30 wherein, makes the process of described guardrail in the vertical direction planarization comprise the plate that makes described guardrail be planarized into a plurality of vertical stackings.

32. the terminal part of a guardrail security system comprises:

The terminal part of guardrail beam comprises upstream extremity and downstream, and at the upstream extremity place of described terminal part, the terminal part of described guardrail beam is highly vertical to subaerial second from the first vertical high inclination that is suitable for the drift vehicle is redirected;

A plurality of supporting struts, it is installed with the contiguous highway of the mode that is spaced apart from each other, and described a plurality of supporting struts are connected to the terminal part of described guardrail beam; With

The terminal supporting strut, it is installed at the upstream extremity place of the most last terminal described highway of vicinity, described terminal supporting strut is by resistant, the connected mode of tensioning and be connected to the upstream extremity of the terminal part of described guardrail beam, described resistant, the connected mode of tensioning is kept tensioning state in the terminal part of described guardrail beam, in the enemy's bump or break-in knockout process that vehicle carries out, described resistant between described terminal supporting strut and the described guardrail beam, the connection of tensioning is kept, and in reverse knockout process, described resistant between described terminal supporting strut and the described guardrail beam, the connection of tensioning is released.

33. terminal part according to claim 32, wherein, the terminal part of described guardrail beam is arranged essentially parallel to highway.

34. terminal part according to claim 32, wherein, the terminal part of described guardrail beam at the upstream extremity place of described guardrail beam from the highway abduction.

35. terminal part according to claim 34, wherein, described abduction is the parabola mode substantially.

36. terminal part according to claim 34, wherein, described abduction is linear substantially.

37. terminal part according to claim 32, wherein, described guardrail beam parts comprise the W beam that has ripple in the vertical, the low ebb about described W beam has between peak and these peaks.

38. according to the described terminal part of claim 37, wherein, the terminal part of described guardrail beam parts is modified to comprise slot area, described slot area comprises one group of three groove, longitudinally extend in the low ebb of these grooves between described up and down peak and these peaks each, described slot area has increased the ability that the terminal part of described guardrail beam parts is flattened.

39. according to the described terminal part of claim 38, wherein, the upstream extremity of described guardrail beam parts is flattened to the plate of four vertical stackings.

40. terminal part according to claim 32, wherein, the upstream extremity of described guardrail beam parts is connected to threaded rod, when described vehicle carried out enemy's bump or break-in bump, described threaded rod and described connected mode resistant, tensioning were cooperated to keep tensioning state in the terminal part of described guardrail beam.

41. terminal part according to claim 32, also comprise the bump head, described bump head is connected to first support member that is arranged in described terminal supporting strut downstream, and described bump head can flatly be shifted with the dissipation Impact energy on downstream direction in the head on collision process.

42. terminal part according to claim 32, wherein, at least one in described a plurality of supporting struts comprises modified supporting strut, and described modified supporting strut comprises:

The bottom, it is used to be installed in below the adjacent slope, road of described highway;

The middle part, it is adjacent basically with slope, described road, described middle part comprises weakening part, and described weakening part can make described supporting strut weaken about first axle, and do not change basically described supporting strut about with the behavior of vertical substantially second axis of described first axle; With

Top, it is releasably attachable to the terminal part of described guardrail beam.

43. the terminal part of a guardrail security system comprises:

The terminal part of guardrail beam;

The terminal supporting strut, it is connected to the upstream extremity of the terminal part of described guardrail beam, and described terminal supporting strut comprises:

Structure member with longitudinal axis, described structure member are used to be installed in below the adjacent slope, road of highway;

Connector assembly, it is connected to described structure member with the terminal part of described guardrail beam with respect to the longitudinal axis of described structure member with acutangulating, described connector assembly comprises opening, and the upstream extremity of the terminal part of described guardrail beam passes described opening and arranges;

Wherein, the vehicle that is connected between the terminal part of described structure member and described guardrail beam carries out being kept in enemy's bump or the break-in knockout process, and released in reverse knockout process.

44. according to the described terminal measure of claim 43, wherein, described structure member comprises the pair of flanges by the center connecting plate interconnection.

45. according to the described terminal measure of claim 43, wherein, described connector assembly comprises a plurality of plates, these plates pile up adjacent to each other and arrange with acute angle with respect to the longitudinal axis of described structure member, in described a plurality of plate at least one is fixed to the end of described structure member, and each in described a plurality of plates comprises opening.

46. according to the described terminal measure of claim 44, wherein, described a plurality of plates comprise:

First plate, it comprises the rectangular slab that has V-arrangement excision district, described V-arrangement excision district is at the top edge of described rectangular slab;

Second plate, it comprises the rectangular slab that has circular open; With

The 3rd plate, it comprises the rectangular slab that has U-shaped excision district, described U-shaped excision district is at the top edge of described the 3rd plate; And

Wherein, when described first plate, described second plate and described the 3rd plate were piled up adjacent to each other, described V-arrangement excision district, described circular open and described U-shaped excision district were aligned with each other.

47. according to the described terminal measure of claim 43, also comprise a plurality of supporting struts, these supporting struts are installed with the contiguous highway of the mode that is spaced apart from each other, described a plurality of supporting struts are connected to the terminal part of described guardrail beam.

48. according to the described terminal measure of claim 47, wherein, the terminal part of described guardrail beam is arranged essentially parallel to described highway.

49. according to the described terminal part of claim 47, wherein, the terminal part of described guardrail beam at the upstream extremity place of described guardrail beam from the highway abduction.

50. according to the described terminal part of claim 49, wherein, described abduction is the parabola mode substantially.

51. according to the described terminal part of claim 49, wherein, described abduction is linear substantially.

52. according to the described terminal part of claim 43, wherein, described guardrail beam parts comprise the W beam that has ripple in the vertical, the low ebb about described W beam has between peak and these peaks.

53. according to the described terminal part of claim 52, wherein, the terminal part of described guardrail beam parts is modified to comprise slot area, described slot area comprises one group of three groove, longitudinally extend in the low ebb of these grooves between described up and down peak and these peaks each, described slot area has increased the ability that the terminal part of described guardrail beam parts is flattened.

54. according to the described terminal part of claim 52, wherein, the upstream extremity of described guardrail beam parts is flattened to the plate of four vertical stackings.

55. according to the described terminal part of claim 43, wherein, the upstream extremity of described guardrail beam parts is connected to threaded rod, described threaded rod is passed opening in the described connector assembly and is fastening.

56. the terminal part of a guardrail security system comprises:

Structure member with longitudinal axis, described structure member are used to be installed in below the adjacent slope, road of described highway;

Connector assembly, it is connected to described structure member with the terminal part of described guardrail beam with respect to the longitudinal axis of described structure member with acutangulating;

57. terminal part according to claim 25, wherein, the terminal part of described guardrail beam is arranged essentially parallel to described highway.

58. terminal part according to claim 25, wherein, the terminal part of described guardrail beam at the upstream extremity place of described guardrail beam from the highway abduction.

59. terminal part according to claim 27, wherein, described abduction is the parabola mode substantially.

60. terminal part according to claim 27, wherein, described abduction is linear substantially.

61. according to the described terminal part of claim 56, wherein, described guardrail beam parts comprise the W beam that has ripple in the vertical, the low ebb about described W beam has between peak and these peaks.

62. according to the described terminal part of claim 61, wherein, the terminal part of described guardrail beam parts is modified to comprise slot area, described slot area comprises one group of three groove, longitudinally extend in the low ebb of these grooves between described up and down peak and these peaks each, described slot area has increased the ability that the terminal part of described guardrail beam parts is flattened.

63. according to the described terminal part of claim 61, wherein, the upstream extremity of described guardrail beam parts is flattened to the plate of four vertical stackings.

64. according to the described terminal part of claim 56, wherein, the upstream extremity of described guardrail beam parts is connected to threaded rod, and when described vehicle carried out enemy's bump or break-in bump, described threaded rod and the cooperation of described connector assembly were to keep tensioning state in the terminal part of described guardrail beam.

65. according to the described terminal part of claim 56, also comprise the bump head, described bump head is connected to first support member that is arranged in described terminal supporting strut downstream, and described bump head can flatly be shifted with the dissipation Impact energy on downstream direction in the head on collision process.

66. according to the described terminal part of claim 56, wherein, at least one in described a plurality of supporting struts comprises modified supporting strut, described modified supporting strut comprises: