CN107202877A - A kind of bridge asphalt pavement bulge forms lab simulation experimental rig and method - Google Patents

Abstract

Lab simulation experimental rig and method are formed the invention discloses a kind of bridge asphalt pavement bulge, purpose is, record bridge deck pavement bulge form changes with time feature, obtain bulge characteristic feature parameter vertical deflection, unsticking radius, the influence factor for analyzing bulge formation, evaluate different pave-load layer resistance bulge abilities, and as follow-up finite element modelling certificate parameter, the technical scheme used for：Experimental rig mainly includes the components such as support frame, environmental cabinet, test specimen fixed mount and MTI 3D malformation measuring systems.Experimentation includes the steps such as test material preparation, test specimen installation, experimental enviroment setting and bulge whole audience displacement measurement.Can speeding-up simulation different type bridge deck pavement material bulge disease generating process in construction and operation using the present invention, overall process records bulge development form, bulge is obtained in the displacement of the different phase whole audience and strain characteristics, for probing into the major influence factors of bulge formation and to disclose bulge formation mechenism significant.

Description

A kind of bridge asphalt pavement bulge forms lab simulation experimental rig and method

Technical field

The invention belongs to bridge asphalt pavement disease prevention techniques field, and in particular to a kind of bridge asphalt pavement bulge shape Into simulation laboratory test device and method.

Background technology

Expressway construction is to mountain development in recent years, and bridge proportion in route is continuously increased, to deck paving The prevention of disease also becomes more important with processing.With application of the new materials such as epoxy asphalt mixture in deck paving, Crack and permanent deformation disease are gradually decreased, and bulge is but increasingly becoming the topmost Damage Types of deck paving, causes people Extensive concern.Deck paving generally includes water-proof tack coat on floorings, mat formation lower floor and upper strata of mating formation.Mixed between each layer Enter after air or moisture, the heated volumetric expansion of the gas being enclosed in summer high temperature in pave-load layer forms huge expansive force, by Pave-load layer jack-up is gradually formed into bulge phenomenon.Bridge floor is during operation between pave-load layer and waterproof layer, or waterproof layer and bridge It is likely to form bulge disease between panel, and bulge disease is with the most normal between waterproof layer and floorings in work progress See.

When bulge disease occurs in deck paving, layers of material is bent and stretching action during heaving, and is held very much Microcrack is also easy to produce, further under the repeated action of dynamic vehicle load and weather, layer surface of mating formation will produce substantial amounts of purt mud Whiting slurry phenomenon, just loses bridge floor cohesive force, is gradually crushed under Driving Loading, most after deck paving is heaved in addition Cause pave-load layer to collapse eventually, and cause extensive damage.More seriously, bulge is produced behind crack, and moisture can be by splitting Seam is directly contacted with floorings, accelerates the corrosion or corrosion to bridge, this has not only had a strong impact on making for deck installation structure With life-span and the globality and flatness of deck paving, potential safety hazard is more the increase in, is unfavorable for the security of driving and comfortable Property.

So currently urgently needing observing to bulge forming process, its morphological feature parameter is obtained, with clear and definite Influence factor and failure mode that bulge is formed, so as to propose effectively to prevent the related measure that bulge disease is produced, for referring to Lead deck installation structure, design of material and construction..From this, being sent out using the method for Site Detection or test simulation bulge Exhibition process morphological feature is observed, and the ability that different pavement materials resist bulge formation under different operating modes is evaluated, as one The problem of individual urgent need to resolve.But live bridge floor bulge disease, the often comprehensive function of each side factor, directly carry out scene Detection is difficult to carry out with analysis, there is larger difficulty, while bridge floor bulge is a process slowly developed, its starting stage becomes Shape is smaller, belongs to and is difficult to observe by implicit type disease.Based on this, carry out lab simulation to the forming process of bulge and just seem very must Will.

Current China is in bridge deck pavement material bulge disease simulation test device and test method field also in blank, state Although the outer forming process for bridge floor or ground surface material bulge develops some analogy methods, these experimental provisions and experiment Method all there are some problems：Load formation bulge is manually set to simulate the effect of pavement material internal gas, but it is this Its loading mode of the mechanical load of manual control acts on excessively single simplification, contraction of gas expansion week compared to actual gas expansion The present experimental provision of the effect of being acted upon by temperature changes is difficult to simulate simultaneously for phase and material property, the destruction of material bulge Form is to have very large deviation with actual conditions in the case where medium is pressurizeed or axle is loaded；Above all current mechanical load method will drum The suffered artificial load of effect of bag forming process, and in actual conditions pave-load layer internal moisture number, floorings dry and wet shape Condition, pavement material voidage may produce material impact to actual loading, and the influence of these key factors is directly closed Arrive and design, the guidance of work progress, but current mechanical load analogy method are difficult to be related to.Can so needing one kind badly Simulate bridge deck pavement material bulge forming process to greatest extent, the experimental method of true reflection bulge internal gas expansion and Device.

The content of the invention

In order to solve the problems of the prior art, the present invention proposes that one kind is able to record that bridge deck pavement bulge evolution Morphological change characteristics, can be used in analyzing the influence factor that bulge is formed, and can evaluate different paving structure layer resistance bulge energy The bridge asphalt pavement bulge of power forms lab simulation experimental rig and method.

In order to realize the above object the technical solution adopted in the present invention is：

A kind of bridge asphalt pavement bulge is formed to be fixedly installed on lab simulation experimental rig, including support frame, support frame Have and be provided with the test specimen fixed mount being provided with environmental cabinet, environmental cabinet for placing test specimen, environmental cabinet for adjusting humiture The humiture of environment produces controller, the environmental cabinet upper end is provided with camera, and the camera is being located at test specimen fixed mount just Upper end, camera is connected to MTI-3D malformation measuring systems；Test specimen include set gradually from bottom to top cement concrete slab, Water-proof tack coat and asphalt mixture paving course, the centre position of the cement concrete slab are provided with cavity, cavity upper end by Water-proof tack coat is sealed, and lower end is sealed by epoxy resin, and experiment space-time intracavitary is dry air or aqueous air.

The environmental cabinet includes bottom plate, top plate and four blocks of side plates, and bottom plate is fixedly connected with support frame, and top plate uses high printing opacity Safety glass, the camera is located at the upper end of top plate.

Seal groove is offered on the bottom plate, the side plate is connected by seal groove and bottom plate.

Chamber door is offered on the side plate of the front end.

The test specimen fixed mount includes being provided with for pressing in the fix bar being fixedly connected with the bottom plate of environmental cabinet, fix bar Pressing plate on test specimen, the centre of the pressing plate sets circular hollow, and circular hollow exposes test specimen, and circular hollow and empty cavity position are just Right, the camera is just to circular hollow.

Temperature and moisture sensors are provided with the environmental cabinet, temperature and moisture sensors are connected to humiture and produce control Device processed.

The camera is set to two, and LED is provided with camera.

The cavity is that support instrument tool is provided with cylindrical hole, cavity.

A kind of bridge asphalt pavement bulge forms lab simulation test method, comprises the following steps：

1) test material preparation：The cement plate of center band cavity is prepared first, then water-proof tack coat is set on cement plate upper berth, is prevented The upper end of water tack coat sealing cavity, secondly lays asphalt mixture paving course on water-proof tack coat, finally utilizes asphalt mixtures modified by epoxy resin The lower end of fat sealing cavity, cavity interior sealing air or distilled water；

2) sprayed in test specimen upper surface after white dumb light paint, then spray black matte paint, then the speckle of fabrication region area will Test specimen is fixed on test specimen fixed mount, and sealed environment case；

3) position and the angle of camera are adjusted, MTI-3D malformation measuring systems is opened, rower is entered using scaling board It is fixed, 4~6 surface of test piece profile photographs are then continuously shot, error compensation is carried out；

4) temperature and humidity in set environment case, camera shoots surface of test piece profile photograph and sends MTI-3D structures to Deformation measuring system, MTI-3D malformations measuring system is analyzed surface of test piece profile photograph, selectes particular picture Specific region obtains the deformation data of surface of test piece each point, and plurality of pictures specified point position is analyzed, and obtains surface of test piece position Shifting, strain data complete experiment with the changing rule of test period.

The step 1) in cavity set support instrument have, support instrument tool include interconnection disk and bar, disk Interleaving agent is smeared in upper surface, when setting water-proof tack coat on cement plate upper berth, the disk upper surface and cement plate for having support instrument Upper surface flush；During epoxy resin sealing cavity, the sealing height of disk regulation epoxy resin is moved up and down.

Compared with prior art, apparatus of the present invention produce controller using humiture and improve environment the temperature inside the box, test specimen drum The load of bag is acted on from deck paving system internal gas expanded by heating, and source module is carried out with deck paving bulge actual loading It is identical, overcome in the past by artificially setting mechanical load loading to be difficult to the shortcoming of the accurate simulation atmospheric pressure mode of action.Test specimen Bulge process is a dynamic process, and after bulge volume becomes big, its interior air pressure is reduced naturally, and bulge extension stops therewith, with Temperature continues to raise, and air pressure increases therewith in bulge, and bulge continues to develop, and above procedure is a homeostasis process, with reality Border bridge floor bulge forming process is identical, but conventional artificial setting mechanical load method is difficult to the complicated loading of the above Bulge is a process quickly formed in journey, and mechanical load test method, is not inconsistent with actual conditions.Temperature in environmental cabinet Function is set with humidity, the temperature and humidity situation of actual environment can be fully simulated, temperature is two to the influence of bulge Aspect：On the one hand influence bulge forms the source of load, i.e., the size of air pressure is directly related with temperature in Deck pavement；It is another Aspect deck paving system material is temperature-sensitive material, and temperature directly affects the mechanical property of material, that is, influences it to resist The ability of bulge, changes the temperature set in environmental cabinet, and two aspects are influenceed simultaneously on more than, and this was formed with live bridge floor bulge It is consistent that journey, which is affected by temperature effect, and conventional mechanical load analogy method is difficult to.It is air to test space-time intracavitary Or water vapour, can fully simulate floorings dry and wet condition, bridge deck pavement material voidage etc. may influence air pressure size because The influence that element is formed to bulge, this point is even more that mechanical load analogue means and method are difficult to.The present invention can be abundant Simulate in the deck paving system construction stage, different type water-proof tack coat bulge forming process, record bridge deck pavement bulge Evolution morphological change characteristics, i.e. vertical deflection and unsticking radius, comparative evaluation difference water-proof tack coat resistance bulge disease Ability, while different paving structure bulge forming processes, comparative evaluation in deck paving system operation stage can be simulated fully Different pavement material resistance bulge disease abilities.The present invention is based on MTI-3D malformation measuring systems, complete using noncontact The problem of sensor produces interference when field displacement measurement system can be overcome in the past to surface of test piece displacement measurement, realizes simultaneously Each point displacement changes over time process in the range of monitoring test specimen bulge, overcomes the shortcoming of conventional spot measurement.Present invention experiment Device repeatability is good, and multiplicating experiment, and device movement easy to disassemble can be carried out to bulge forming process under same operating, It can quickly assemble and use in different experiments room, it is easy to promote.

Further, top plate uses high printing opacity safety glass, and camera is located at safety glass upper end, improves the transmission of light Rate, becomes apparent from the surface of test piece profile photograph that camera is gathered, improves the reliability of test structure.

Further, seal groove is set on bottom plate, side plate is connected by seal groove and bottom plate, makes whole environmental cabinet sealing It is good, it is to avoid interference of the external environment to experiment, further promote the accuracy of experiment.

Further, test specimen is fixed using pressing plate, fixed is more firm, exposes test specimen using circular hollow, it is circular empty The heart is just right with empty cavity position, makes the influence of the position of bulge not compression plate, and camera can be good at collecting the region position of deformation Put.

Further, LED provides certain brightness for test specimen upper surface, using two cameras, adjusts camera position and angle Degree, can be such that the picture of shooting clearly overlaps, the analysis for MTI-3D malformation measuring systems provides reliable deformation of cylindrical Foundation.

The inventive method includes test material preparation, test specimen installation, experimental enviroment setting and bulge whole audience displacement measurement step, energy Enough speeding-up simulation different type bridge deck pavement material bulge disease generating processes in construction and operation, overall process record bulge hair Spread state, obtains bulge in the displacement of the different phase whole audience and strain characteristics, has for the major influence factors for probing into bulge formation It is significant.

Further, during water-proof tack coat is layed in cement plate surface, support instrument tool is played a supporting role, to ensure The water-proof binding layer material that laying early strength is not formed is an entirety at cement plate cavity, treats that water-proof tack coat cools down shape Into after intensity, slowly support instrument tool is removed outside hole, because interleaving agent, support instrument tool and waterproof had been smeared in support instrument tool surface Tack coat is easily disengaged from without influenceing the globality of water-proof tack coat, so as to be prepared into water-proof tack coat and there is circular hole area The cement plate test specimen in domain, there to be the region of non-adherent defect between construction simulation process floorings and water-proof tack coat；Epoxy The effect of resin is to close cavity, it is ensured that be difficult to escape when air heats expand in cavity, so as to be produced to pavement material The effect of heaving, the effect of support instrument tool is to ensure that epoxy resin condenses in hole at different height, can adjust epoxy resin Sealing height.

Brief description of the drawings

Fig. 1 is the front schematic view of apparatus of the present invention；

Fig. 2 is the schematic top plan view of apparatus of the present invention；

Fig. 3 is the structural representation of pressing plate；

Fig. 4 is the structural representation that support instrument has；

Fig. 5 is the structural representation of test specimen；

Wherein, 1- support frames, 2- environmental cabinets, 3- test specimens fixed mount, 4-MTI-3D malformations measuring system, 5- test specimens, 5-1- cement concrete slabs, 5-2- water-proof tack coats, 5-3- asphalt mixture paving courses, 5-4- cavitys, 5-5- epoxy resin, 5- 6- support instruments tool, 6- cameras, 7- bolts, 8- bottom plates, 9- side plates, 10- top plates, 11- humitures produce controller, 12- fix bars, 13- tightening nuts, 14- pressing plates, 15- circular holes, 16- circular hollows, 17- chamber doors.

Embodiment

The present invention is further explained with reference to specific embodiment and Figure of description.

Referring to Fig. 1 and Fig. 2, apparatus of the present invention include support frame 1, environmental cabinet 2, test specimen fixed mount 3 and MTI-3D structures and become Shape measuring system 4.Support frame 1 is positioned in ground grading, and effect is the upper element for supporting whole device, and support includes environment Case 2, test specimen fixed mount 3, the camera frame of test specimen 5 and camera 6.Support frame 1 is made up of four rigid cylinders, cylinder top End is provided with thread groove, and the bottom plate 8 for realizing support frame 1 and environmental cabinet 2 by the connection function of bolt 7 and thread groove is fixed, and then Realize supporting role of the support frame 1 to upper element.

Environmental cabinet 2 is square framework, and its main function is to provide the temperature and humidity under certain condition in process of the test Environment, to simulate warm and humid environmental change on actual bridge floor.The bottom plate 8 of environmental cabinet 2 is connected with support frame 1 by bolt 7, plays examination Test the effect of operating desk and enclosed environment case 2.Seal groove is provided with bottom plate 8, the side plate 9 of the steel of environmental cabinet 2 passes through sealing Groove and bottom plate 8 are closely coupled.Top plate 10 is the safety glass of high projection, is that camera 6 provides a window that can be shot.Camera 6 During shooting directly over environmental cabinet 2, camera lens is just to test specimen 5.The front side of environmental cabinet 2 is provided with chamber door 17, and test specimen 5, ring are placed to facilitate The chamber door 17 of border case 2 is connected by hinge with the side plate in the left side of environmental cabinet 2.Environmental cabinet 2 is internally provided with temperature and humidity sensing Device, the side wall of environmental cabinet 2 is provided with humiture and produces controller 11.The effect of temperature setting is gas in the cavity 5-4 for make test specimen Body produces huge expansive force when heated, and then pavement material is gradually heaved.The effect of humidity set is to make sky in environmental cabinet 2 Gas has certain humidity, to simulate actual bridge floor air ambient humidity conditions.

Test specimen fixed mount 3 act as ensureing that test specimen is fixed in process of the test, camera 6 can steady shot to test specimen The change procedure of pavement material surface bulge, without being influenceed by the overall rigid body displacement of test specimen 5.Test specimen fixed mount 3 is solid by four The pressing plate 14 of fixed pole 12, eight tightening nuts 13 and one piece of steel is constituted.Pass through four fix bars 12 and the bottom plate 8 of environmental cabinet 2 It is connected, fix bar 12 can be inserted vertically into hole prefabricated on the bottom plate 8 of environmental cabinet 2；Referring to Fig. 3, the corner of pressing plate 14 is set There is circular hole 15, pressing plate 14 can be connected by circular hole with fix bar 12, the middle part of pressing plate 14 is circular hollow 16, and pressing plate 14 lies against examination On part 5, realize that pressing plate 14 fixes test specimen 5 by the tightening nut 13 of the upper and lower ends of fix bar 12.

MTI-3D malformations measuring system is used to shooting, handle, test specimen pavement material surface bulge in analysis environments case Deformation, the equipment is based on digital image correlation technique and carries out non-cpntact measurement to surface of test piece bulge displacement, public by Belgian MTI Department's production, main accessories include high-power LED lamp lighting device, industrial camera 6 and computer control system.Camera 6 During shooting directly over environmental cabinet 2, camera lens is just to the surface of test specimen 5, filming frequency automatically setting, can reach and per second at least shoots Frequency once.

The inventive method, comprises the following steps：

1. the preparation of test specimen

(1) cement concrete for first mixing certain mass, by groups such as cement, coarse aggregate, fine sand, water, additives Into, it is fitted into the rut die trial that length, width and height are respectively 30cm*30cm*5cm, the rut plate equipped with material is put on a vibration table, it is lasting 3~5min is vibrated, is molded during the board-like test specimen of cement concrete, vibratory concrete, is inserted vertically into concrete middle position A diameter of 1cm, be highly 6cm steel solid cylinder, at the end of the concrete initial set time, by steel solid cylinder from mixed It is slowly withdrawn in concrete board, then an a diameter of 1cm vertical circular hole is obtained in cement plate center, then by code requirement to band Hole cement concrete slab carries out health 28d, to simulate cement concrete floorings；

(2) cement concrete slab is put into drier 48h, to simulate cement concrete slab completely dried state, obtain as Cement concrete slab 5-1 shown in Fig. 5；

(3) support instrument tool 5-6 as shown in Figure 4 is made, support instrument is had into the cylinder that 5-6 is put into cement concrete slab 5-1 In shape hole, it is ensured that support instrument tool 5-6 top disc and cement concrete slab 5-1 upper surface maintain an equal level, and have 5-6 in support instrument Bituminous Isolation Agent, the mixed solution of such as talcum powder and glycerine are smeared on the disk at top；

(4) method smeared using resistant to elevated temperatures liquid spray gun or application will spray class water-proof binding layer material, such as rubber Pitch, SBS modified pitch etc., by default dose requirements, such as 1.5kg/m², cement concrete plate surface is uniformly sprayed onto, or Directly by coiled material class water-proof binding layer material, such as APA waterproof rolls heating is laid on cement concrete plate surface., all kinds of waterproofs During tack coat is layed in cement concrete slab 5-1 surfaces, support instrument tool 5-6 plays a supporting role, to ensure laying just The water-proof binding layer material that phase intensity is not formed is an entirety in cement plate central hole, treats that water-proof tack coat 5-2 cools down shape Into after intensity, slowly support instrument tool is removed outside hole, because interleaving agent, support instrument tool and waterproof had been smeared in support instrument tool surface Tack coat can be easily disengaged from without influenceing the globality of water-proof tack coat, so that what is be prepared into carries water-proof tack coat and there is circle The cement plate test specimen of bore region, there to be non-adherent defect area between construction simulation process floorings and water-proof tack coat；

(5) laying water-proof tack coat in cement plate upper surface is cooled into after intensity, is further laid thereon and is compacted bridge Face asphalt, such as AC classes asphalt, casting type asphaltic mixture, SMA asphalts and bituminous epoxy mixing Material etc., support instrument tool is played a supporting role in pavement material process of deployment, the water-proof binding layer material not formed with proof strength In cement plate central hole it is an entirety with asphalt, after material intensity of cooling to be mixed is formed, slowly has support instrument Remove outside cylindrical hole, because interleaving agent had been smeared on support instrument tool surface, support instrument tool is mixed with water-proof tack coat, pitch Material can be easily disengaged from without influenceing the globality of upper layer of material, and as shown in Figure 5 water-proof tack coat, pitch are carried so as to be prepared into Pave-load layer and the cement plate test specimen that there is circular hole region, are non-fully bonded with simulating operation process floorings with Deck pavement presence The test specimen prepared in the region of defect, step (4), (5) is that type two kinds big is represented, and is arranged side by side in the absence of sequencing；

(6) test specimen in (4) and (5) is overturn and kept flat, make cement plate bottom surface upward, by support instrument used in above step Have and be put into the cylindrical hole of cement plate, and it is fair with hole middle height at the top of tool to shift branch, and stream is then poured into hole The poor epoxy resin 5-5 of dynamic property, the effect of epoxy resin is to close hole, it is ensured that be difficult to when air heats expand in hole from Hole is escaped, so as to produce the effect of heaving to pavement material, the effect of support instrument tool is to ensure that epoxy resin is highly located to coagulate in hole 1/2 Knot, forms about one closing, is highly 2.5cm cylindrical spaces, the air closed in hole as shown in Figure 5 is with the scene of simulating Air in adhesive free region is enclosed between Deck pavement and floorings；

(7) the test specimen upset in (4) and (5) is kept flat, makes cement plate bottom surface upward, then noted by syringe into hole Penetrate quantitative distilled water, such as 1mL~3mL then with support instrument tool is put into cement plate hole step 6 Suo Shi, and pours into epoxy Resin, forms cement plate center and is closed in about one closing, the highly cylindrical space for 2.5cm, hole as shown in Figure 5 Air and water be enclosed in air and water in the adhesive free region between Deck pavement and floorings, step to the scene of simulating (6), the test specimen prepared in (7) is that type two kinds big is represented, that is, is completely dried and has water, be arranged side by side in the absence of sequencing 's；

2. test specimen is fixed

(1) centered on cylindrical hole position, white dumb light paint is sprayed in surface of test piece, black matte paint is then sprayed again, The speckle of certain area area is manufactured, the setting of speckle is the basis using MTI-3D malformation measuring systems, be its foundation Coordinate system carries out the steps necessary of whole audience displacement measurement；

(2) test specimen with speckle is lain against on environmental cabinet bottom plate, the fix bar of fixed mount is then inserted into bottom plate Hole in, secondly the hole of pressing plate corner is aligned with fix bar, lie against on test specimen, finally by fix bar upper and lower ends spiral shell Bolt is tightened, and fixes test specimen；

3. preparation

(1) LED is opened, certain brightness is provided for surface of test piece, and adjusts camera position and angle, makes two cameras The picture of shooting try one's best it is clear overlap；

(2) MTI-3D malformation measuring systems, the scaling board carried using MTI-3D malformation measuring systems) are opened Demarcated, then continuous paving shoots 4~6 surface of test piece pictures, and error compensation is carried out by measuring system software；

4. actual environment is simulated

Environmental cabinet is heated, while setting humidity in device set environment case by humidity, and passes through Temperature and Humidity Control Device records temperature and humidity versus time curve, and temperature, humidity ensure constant when reaching setting value, while in an experiment In cycle, according to settable different temperature change cycle and humidity period of change inside experiment purpose environmental cabinet；

5. bulge morphological data is gathered and analysis

While environmental cabinet is started working, the shooting software of MTI-3D malformation measuring systems is opened, in an experiment Surface of test piece profile is shot by every 10 seconds speed once in cycle, the picture automatic storage collected is in computer；

Using the analysis software of MTI-3D malformation measuring systems, the specific region of selected particular picture can obtain test specimen The deformation data of surface each point, further can also be analyzed plurality of pictures specified point position, obtain its displacement, strain data with The changing rule of test period.

The present invention mainly has advantages below：

1. the load of test specimen bulge is acted on from deck paving system internal gas expanded by heating in the present invention, with bridge floor It is identical that bulge actual loading of mating formation carrys out source module, overcomes in the past by the external loads such as artificially set coated by dielectric or axle to load It is difficult to the shortcoming of the accurate simulation atmospheric pressure mode of action.

2. test specimen bulge process is a dynamic process in the present invention, after bulge volume becomes big, its interior air pressure is reduced naturally, Bulge extension stops therewith, and as temperature continues to raise, air pressure increases therewith in bulge, and bulge continues to develop, and above procedure is One homeostasis process is identical with actual bridge floor bulge forming process.But conventional artificial setting mechanical load method is difficult to Complicated loading procedure more than realizing, and bulge is a process quickly formed in mechanical load test method, with actual feelings Condition is not inconsistent.

3. setting function by the temperature and humidity in environmental cabinet, the temperature and humidity shape of actual environment can be fully simulated Condition.Temperature is both sides to the influence of bulge：On the one hand influence bulge forms the source of load, i.e. gas in Deck pavement The size of pressure is directly related with temperature；Another aspect deck paving system material is temperature-sensitive material, and temperature is directly affected The mechanical property of material, that is, the ability for influenceing it to resist bulge.Change the temperature set in environmental cabinet in the present invention, can be to the above Two aspects influence simultaneously, and it is consistent, and conventional simulation side that this, which is affected by temperature with live bridge floor bulge forming process and acted on, Method is difficult to.

Air pressure may be influenceed big 4. the present invention can fully simulate floorings dry and wet condition, bridge deck pavement material voidage etc. The influence that small factor is formed to bulge, and conventional analogue means and method is difficult to.

5. the present invention can fully simulate different type water-proof tack coat bulge in the deck paving system construction stage and be formed Process, can be with the different water-proof tack coat resistance bulge disease abilities of comparative evaluation.It can fully simulate deck paving system simultaneously Different paving structure bulge forming processes in operation stage, can resist bulge disease energy with the different pavement material of comparative evaluation Power.

6. the present invention is based on MTI-3D noncontact whole audience displacement measurement systems, it can overcome and surface of test piece displacement was surveyed in the past The problem of sensor produces interference during amount, while can also realize that each point displacement was changed over time in the range of monitoring test specimen bulge Journey, overcomes the shortcoming of conventional spot measurement.

7. present invention experiment repeatability is good, it can carry out multiplicating experiment to bulge forming process under same operating.

8. experimental rig movement easy to disassemble in the present invention, can quickly assemble in different experiments room and use, it is easy to promote.

Claims (9)

1. a kind of bridge asphalt pavement bulge forms lab simulation experimental rig, it is characterised in that including support frame (1), support The test specimen fixed mount (3) being provided with environmental cabinet (2), environmental cabinet (2) for placing test specimen (5), ring are fixedly installed on frame (1) The humiture for adjusting humiture environment is provided with border case (2) and produces controller (11), environmental cabinet (2) upper end is set There is camera (6), the camera (6) is located at the positive upper end of test specimen fixed mount (3), and camera (6) is connected to MTI-3D malformations survey Amount system (4)；Test specimen (5) includes the cement concrete slab (5-1), water-proof tack coat (5-2) and drip set gradually from bottom to top Blue or green compound pave-load layer (5-3), the centre position of the cement concrete slab (5-1) is provided with cavity (5-4), cavity (5-4) Upper end is sealed by water-proof tack coat (5-2), and lower end is sealed by epoxy resin (5-5), and it is dry air that cavity (5-4) is interior during experiment Or aqueous air.

2. a kind of bridge asphalt pavement bulge according to claim 1 forms lab simulation experimental rig, it is characterised in that The environmental cabinet (2) includes bottom plate (8), top plate (10) and four pieces of side plates (9), and bottom plate (8) is fixedly connected with support frame (1), pushes up Plate (10) uses high printing opacity safety glass, and the camera (6) is located at the upper end of top plate (10).

3. a kind of bridge asphalt pavement bulge according to claim 2 forms lab simulation experimental rig, it is characterised in that Seal groove is offered on the bottom plate (8), the side plate (9) is connected by seal groove and bottom plate (8).

4. a kind of bridge asphalt pavement bulge according to claim 3 forms lab simulation experimental rig, it is characterised in that Chamber door (17) is offered on the side plate (9) of the front end.

5. a kind of bridge asphalt pavement bulge according to claim 4 forms lab simulation experimental rig, it is characterised in that The test specimen fixed mount (3) includes the fix bar (12) being fixedly connected with the bottom plate (8) of environmental cabinet (2), and fix bar is set on (12) The pressing plate (14) for being pressed on test specimen (5) is equipped with, the centre of the pressing plate (14) is circular hollow (16), circular hollow (16) Expose test specimen (5), circular hollow (16) and cavity (5-4) position are just right, and the camera (6) is just to circular hollow (16).

6. a kind of bridge asphalt pavement bulge according to claim 1 forms lab simulation experimental rig, it is characterised in that Temperature and moisture sensors are provided with the environmental cabinet (2), temperature and moisture sensors are connected to humiture and produce controller (11)。

7. a kind of bridge asphalt pavement bulge according to claim 1 forms lab simulation experimental rig, it is characterised in that The cavity (5-4) is that support instrument tool (5-6) is provided with cylindrical hole, cavity (5-4).

8. a kind of bridge asphalt pavement bulge forms lab simulation test method, it is characterised in that comprise the following steps：

1) test material preparation：Center band cavity (5-4) cement plate (5-1) is prepared first, is then set up defences on cement plate (5-1) upper berth Water tack coat (5-2), the upper end of water-proof tack coat (5-2) sealing cavity (5-4) is secondly laid on water-proof tack coat (5-2) Asphalt mixture paving course (5-3), it is close in cavity (5-4) finally using the lower end of epoxy resin (5-5) sealing cavity (5-4) Seal dry air or aqueous air；

2) sprayed in test specimen upper surface after white dumb light paint, then spray black matte paint, the speckle of fabrication region area, then by test specimen (5) it is fixed on test specimen fixed mount (3), and sealed environment case (2)；

3) position and the angle of camera (6) are adjusted, MTI-3D malformations measuring system (4) is opened, is carried out using scaling board Then demarcation is continuously shot 4~6 surface of test piece profile photographs to build space coordinates, carries out error compensation；

4) temperature and humidity in set environment case (2), camera (6) shoots surface of test piece profile photograph and sends MTI-3D knots to Structure deformation measuring system (4), MTI-3D malformations measuring system (4) is analyzed surface of test piece profile photograph, selectes figure The specific region of piece obtains the deformation data of surface of test piece each point, and plurality of pictures specified point position is analyzed, test specimen table is obtained Face displacement, strain data complete experiment with the changing rule of test period.

9. a kind of bridge asphalt pavement bulge according to claim 8 forms lab simulation test method, it is characterised in that The step 1) in set support instrument to have (5-6) in the cavity (5-4), support instrument tool (5-6) include the disk being connected with each other and Bar, disk upper surface smears interleaving agent, when setting water-proof tack coat (5-2) on cement plate (5-1) upper berth, support instrument is had (5-6) Disk upper surface and cement plate (5-1) upper surface flush；During epoxy resin (5-5) sealing cavity (5-4), circle is moved up and down The sealing height of disk regulation epoxy resin (5-5).