CN206090275U - Assembled rectangular concrete -filled steel tube makes up truss bridge - Google Patents

Abstract

The utility model discloses an assembled rectangular concrete -filled steel tube makes up truss bridge, including bridge lower part bearing structure, assembled girder and the prefabricated decking is connected through shear connector and assembled girder, just it is assembled by a plurality of vertical trusss and forms the assembled girder for rectangular concrete -filled steel tube composite truss, and vertically the truss comprises upper chord, lower chord and web member, all is provided with directly over every girder lower part bearing structure to intersect horizontal bridge that the bracing laid constitutes to bearing structure by twice, upper chord and lower chord form by the festival section concatenation of a plurality of chord members, and all chord members festivals of lieing in the hogging moment district in all chord members festival sections in the upper chord and the lower chord section are the PBL type chord member of putting more energy into. The utility model has the advantages of simple structure and reasonable design and the construction is simple and convenient, the advantage that can the full play steel concrete material combines, and the atress performance is good, has increased substantially the construction speed of bridge, reduces the bridge cost, can realize standardization, the mass production of bridge girder and decking.

Description

Assembled concrete-filled rectangular steel tube combines truss bridge

Technical field

This utility model belongs to technical field of bridge construction, combines more particularly, to a kind of assembled concrete-filled rectangular steel tube Truss bridge.

Background technology

In traditional steel and concrete structure bridge work progress, there is costly transport of materials, long construction period, on-site concrete The shortcomings of pouring quality is difficult to ensure, the bridge using effect of construction molding is poor, while also there is bridge frame in work progress If speed is slow, low construction efficiency, work progress easily by the problems such as environmental constraints are larger, being also unfavorable for should in road rapid repair etc. Fast erecting construction bridges in the case of urgency.Therefore, one kind is designed using concrete-filled steel tube truss combinative structure as bridge bearing Structure is conducted oneself with dignity with reducing transport of materials cost and mitigating bridge, while by being simplified and being adjusted simultaneously energy to bridge construction technique Reduce site operation difficulty, the bridges scheme saved the duration, reduce construction cost, it appears be even more important.

Utility model content

Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, there is provided a kind of assembling Formula concrete-filled rectangular steel tube combines truss bridge, and its simple structure, reasonable in design and easy construction can give full play to steel and concrete The advantage that material is combined, stress performance are good, and the speed of application of bridge is greatly improved, and reduce bridge cost, are capable of achieving bridge The standardization of girder and floorings, mass production.

To solve above-mentioned technical problem, the technical solution adopted in the utility model is：A kind of assembled rectangular steel pipe coagulation Truss bridge closes in local soil type, it is characterised in that：Including bridge bottom bracing structure, the dress being supported on the bridge bottom bracing structure Prefabricated bridge with formula girder and on the assembled girder, the bridge bottom bracing structure include that multiple edges are indulged Bridge to the girder bottom bracing structure laid from front to back, the assembled girder be concrete-filled rectangular steel tube composite roof truss and its It is attached by shear connector between prefabricated bridge；The concrete-filled rectangular steel tube composite roof truss is from the vertical bridge in multiple edges to cloth If longitudiual truss it is assembled, multiple longitudiual truss are laid from left to right side by side along direction across bridge, each described longitudinal purlin Frame is constituted by top boom, the lower boom being laid in below top boom and the web member being connected between top boom and lower boom, institute Top boom and lower boom are stated in horizontal layout and the two vertical bridge in edge is to laying；Each described girder bottom bracing structure is just Top is provided with the direction across bridge supporting construction for intersecting that by twice the diagonal brace laid is constituted, and the diagonal brace is supported in top boom with Between chord member；The concrete-filled rectangular steel tube composite roof truss is from the vertical bridge in edge to the multiple truss sections assemblings laid from front to back It is spliced into, the top boom and lower boom from front to back by multiple chord member sections, all chord members in the top boom All chord member sections in sections and the lower boom positioned at hogging moment area are PBL and put more energy into type chord member, and the PBL puts more energy into type string Bar includes concrete filled steel tube and along vertical bridge to the PBL stiffeners being laid in the concrete filled steel tube, and the PBL adds Strength plate is strip open pore steel plate.

Above-mentioned assembled concrete-filled rectangular steel tube combines truss bridge, it is characterized in that：Except the PBL puts more energy in the lower boom All chord member sections outside type chord member are sky steel pipe.

Above-mentioned assembled concrete-filled rectangular steel tube combines truss bridge, it is characterized in that：Each described longitudiual truss is in perpendicular The straight plane girder to laying, each described longitudiual truss include that the top boom is located at immediately below top boom with together with together Lower boom, be attached by web member described in string between the top boom and the lower boom immediately below which, each column The web member indulges bridge to the web member laid from front to back including many edges.

Above-mentioned assembled concrete-filled rectangular steel tube combines truss bridge, it is characterized in that：The concrete-filled rectangular steel tube combines purlin Connected to the upper connecting rod laid from front to back along vertical bridge by multiple tracks between top boom described in the adjacent twice in left and right in frame Connect, in the concrete-filled rectangular steel tube composite roof truss described in the adjacent twice in left and right between lower boom by multiple tracks along vertical bridge to from The lower connecting rod that A-P is laid is attached；The upper connecting rod and lower connecting rod are I-steel；

It is supported in the bridge bottom bracing structure below the concrete-filled rectangular steel tube composite roof truss rear and front end Girder bottom bracing structure be end support structure, the institute in the bridge bottom bracing structure in addition to the end support structure There is girder bottom bracing structure to be medial support structures, positioned at the centre in the concrete-filled rectangular steel tube composite roof truss Region above support structure is the hogging moment area.

Above-mentioned assembled concrete-filled rectangular steel tube combines truss bridge, it is characterized in that：The concrete filled steel tube includes square Shape steel pipe is welded with the pipe inner concrete structure in the rectangular steel pipe, the PBL stiffeners that the PBL puts more energy in type chord member is poured It is connected on the inwall of the rectangular steel pipe；The PBL in the top boom puts more energy into type chord member and puts more energy into type top boom for PBL, institute State the PBL in lower boom and put more energy into type chord member and put more energy into type lower boom for PBL, the PBL puts more energy into rectangle described in type top boom On the inwall of both sides up and down of steel pipe, equal vertical runs have a PBL stiffeners described in multiple tracks, and the PBL puts more energy into square described in type lower boom On the inwall of shape steel pipe, equal vertical runs have PBL stiffeners；

All chord member sections in the lower boom in addition to the PBL puts more energy into type chord member are rectangle sky steel pipe.

Above-mentioned assembled concrete-filled rectangular steel tube combines truss bridge, it is characterized in that：The PBL puts more energy into many in type top boom In uniform laying, the PBL puts more energy into PBL stiffeners described in road PBL stiffeners in symmetrical laying；The PBL put more energy into rectangular steel pipe described in type lower boom four medial walls in the middle part of it is vertical It is laid with a PBL stiffener.

Above-mentioned assembled concrete-filled rectangular steel tube combines truss bridge, it is characterized in that：In the prefabricated bridge along vertical bridge to Multiple tracks transverse prestressed reinforcing steel bar is provided with from front to back, and described in multiple tracks, transverse prestressed reinforcing steel bar is laid in same level； The prefabricated bridge is assembled from front to back by multiple prefabricated bridge sections, in front and back the two neighboring prefabricated bridge It is attached by the wet seam of direction across bridge between sections, the wet seam of the direction across bridge is the wet seam of cast-in-place concrete；It is described prefabricated The vertical bridge in multigroup edge is provided with to laying on the multiple described prefabricated bridge sections of same hogging moment area in floorings Longitudinal prestressing reinforcing bar, multigroup longitudinal prestressing reinforcing bar are laid in same level；A left side for top boom described in per pass One group described in longitudinal prestressing reinforcing bar is symmetrically laid with above right both sides, per group of longitudinal prestressing reinforcing bar includes multiple tracks The longitudinal prestressing reinforcing bar being laid in along direction across bridge from left to right in same level.

Above-mentioned assembled concrete-filled rectangular steel tube combines truss bridge, it is characterized in that：On top boom described in per pass by it is front extremely After be provided with multigroup shear connector, be provided with each described prefabricated bridge sections for shear connector install reserving hole, institute State cast-in-place concrete structure of the shear connector by pouring in the reserving hole to be fastenedly connected with the prefabricated bridge sections It is integrated.

Above-mentioned assembled concrete-filled rectangular steel tube combines truss bridge, it is characterized in that：It is empty that the web member and diagonal brace are rectangle Steel pipe, the diagonal brace is in vertically to laying.

Above-mentioned assembled concrete-filled rectangular steel tube combines truss bridge, it is characterized in that：The across footpath of the assembled girder is 50m ～80m.

This utility model has advantages below compared with prior art：

1st, simple structure, site operation are easy and input construction cost is relatively low.

2nd, from being assembled to multiple truss sections are divided into from front to back along vertical bridge, each truss sections shifts to an earlier date in precasting yard Prefabricated to process, simple processing, high in machining efficiency and crudy are easy to ensure.

3rd, the prefabricated bridge for being adopted is assembled from front to back by multiple prefabricated bridge sections, each prefabricated bridge Sections precasting yard shift to an earlier date it is prefabricated process, simple processing, high in machining efficiency and crudy be easy to ensure.

4th, each component connection is reliable and easy to assembly, is difficult by artificial destruction, long service life.

5th, using effect is good, good mechanical performance and practical value is high, with advantages below：Firstth, rectangular steel pipe coagulation The mechanical property of native composite roof truss is good and structure is lighter, and hogging moment area is located in all chord member sections and lower boom in top boom All chord member sections be PBL and put more energy into type chord member, all chord member sections in lower boom in addition to PBL puts more energy into type chord member are Empty steel pipe, upper connecting rod and lower connecting rod are I-steel；Web member and diagonal brace are rectangle sky steel pipe；Secondth, in top boom PBL stiffeners are provided with all chord member sections of hogging moment area in all chord member sections and lower boom, are adopted PBL stiffeners can effectively strengthen the local compression stability of rectangular steel pipe, and substantially improve the interface-bonding of steel pipe and concrete Slip property, while each ingredient of whole concrete filled steel tube is closely linked to be entirety.Set PBL stiffeners are not The comprcssive strength of concrete filled steel tube is improve only, the local compression stability of tube wall is enhanced；PBL stiffeners act as cutting simultaneously The effect of power part, makes steel pipe be linked to be entirety with concrete, improves the compound action of steel and concrete.

6th, it is attached by shear connector between assembled girder and prefabricated bridge, prefabricated processing is carried out to truss sections When, shear connector is directly anchored on top boom, erected on site only needs the wet seam of cast-in-place direction across bridge and shear connector reserved when constructing Hole slot, not only easy construction, fast, and construction quality is easy to ensure, can effectively improve assembled girder with prefabricated bridge Connection reliability between panel, is made assembled girder be fastenedly connected with prefabricated bridge and is integrated, and globality is very good.

7th, prefabricated bridge reasonable in design, easy construction and the construction quality for being adopted is easy to guarantee, prefabricated bridge floor The vertical bridge in multigroup edge is provided with to the longitudinal prestressing reinforcing bar laid on the prefabricated bridge sections of hogging moment area in plate, each One group of longitudinal prestressing reinforcing bar is symmetrically laid with above the left and right sides of top boom, can effectively strengthen the decking in the negative moment region Cracking resistance and globality.

8. the construction method that adopted is simple, reasonable in design and easy construction, efficiency of construction are high, using effect is good, can have Effect reduces the labor intensity in bridge construction process, in advance concrete-filled rectangular steel tube composite roof truss and prefabricated bridge is carried out pre- System processing, the cast-in-place concrete structure that scene need to only be assembled and the wet seam of direction across bridge of constructing and shear connector are fixed, assembling Speed is fast, and construction quality is easy to ensure.Also, form of construction work is flexibly, under conditions of not limited by place, can be hung using whole hole Dress or segment lifting mode；When construction place has railway, highway to pass through, incremental launching construction can be adopted；When across V-type mountain valley or river During stream, cantilever construction or incremental launching construction can be adopted.As shown in the above, this utility model is capable of achieving the standardization of bridge, criticizes Quantify production, increase substantially bridge construction speed, reduce bridge cost, using effect is good, is easy to promote the use of.

In sum, this utility model simple structure, reasonable in design and easy construction, can give full play to steel and concrete material The advantage that material is combined, stress performance are good, and the speed of application of bridge is greatly improved, and reduce bridge cost, are capable of achieving bridge main Beam and standardization, the mass production of floorings, are easy to promote the use of.

Below by drawings and Examples, the technical solution of the utility model is described in further detail.

Description of the drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is vertical bridge of the present utility model to structural representation.

Fig. 3 is the direction across bridge structural representation of this utility model hogging moment area assembled girder and prefabricated bridge.

Fig. 3-1 is the structural representation after prefabricated bridge installation of the present invention.

Fig. 4 is that this utility model PBL puts more energy into the structural representation of type top boom.

Fig. 5 is that this utility model PBL puts more energy into the structural representation of type lower boom.

Fig. 6 is construction method FB(flow block) of the present utility model.

Description of reference numerals:

1-prefabricated bridge；2-1-top boom；2-2-upper connecting rod；

3-1-lower boom；3-2-lower connecting rod；4-web member；

5-shear connector；6-PBL stiffeners；7-cast-in-place concrete structure；

8-1-longitudinal prestressing reinforcing bar；8-2-transverse prestressed reinforcing steel bar；9-diagonal brace；

10-girder bottom bracing structure；The wet seam of 11-direction across bridge；

12-vertical concrete structure.

Specific embodiment

As shown in figure 1, this utility model includes bridge bottom bracing structure, is supported on the bridge bottom bracing structure Assembled girder and the prefabricated bridge 1 on the assembled girder, the bridge bottom bracing structure includes many To the girder bottom bracing structure 10 laid from front to back, the assembled girder is combined the vertical bridge in individual edge for concrete-filled rectangular steel tube Truss and its be attached by shear connector 5 between prefabricated bridge 1；With reference to Fig. 2 and Fig. 3, the concrete-filled rectangular steel tube Composite roof truss is assembled to the longitudiual truss laid from the vertical bridge in multiple edges, multiple longitudiual truss along direction across bridge from left to right Lay side by side, each described longitudiual truss is by top boom 2-1, the lower boom 3-1 being laid in below top boom 2-1 and is connected to Web member 4 between top boom 2-1 and lower boom 3-1 is constituted, and the top boom 2-1 and lower boom 3-1 is in horizontal layout and two Person is along vertical bridge to laying；The surface of each girder bottom bracing structure 10 is provided with and intersects the oblique of laying by twice The direction across bridge supporting construction of 9 composition of support, the diagonal brace 9 are supported between top boom 2-1 and lower boom 3-1；The rectangular steel pipe , from being assembled to the multiple truss sections laid from front to back along vertical bridge, the top boom 2-1 is with for Combined concrete truss Chord member 3-1 is spliced from front to back by multiple chord member sections, all chord member sections in the top boom 2-1 and it is described under All chord member sections in chord member 3-1 positioned at hogging moment area are PBL and put more energy into type chord member, and PBL type chord members of putting more energy into include steel , to the PBL stiffeners 6 being laid in the concrete filled steel tube, the PBL stiffeners 6 are equal for the vertical bridge of pipe concrete structure and edge For strip open pore steel plate.

It is supported in the bridge bottom bracing structure below the concrete-filled rectangular steel tube composite roof truss rear and front end Girder bottom bracing structure 10 is end support structure, in the bridge bottom bracing structure in addition to the end support structure All girder bottom bracing structures 10 are medial support structures, in the concrete-filled rectangular steel tube composite roof truss be located at it is described in Between region above supporting construction be the hogging moment area.Thus, bear described in the concrete-filled rectangular steel tube composite roof truss The quantity in moment of flexure area is identical with the quantity of the medial support structures.

In the present embodiment, the girder bottom bracing structure 10 is bridge pier or abutment.

In the present embodiment, all chord member sections in the lower boom 3-1 in addition to the PBL puts more energy into type chord member are sky Steel pipe.

Also, all chord member sections in the lower boom 3-1 in addition to the PBL puts more energy into type chord member are rectangle sky steel Pipe.

In the present embodiment, the cross-sectional structure and size all same of the adopted steel pipe of the lower boom 3-1.

In the present embodiment, the web member 4 is rectangle sky steel pipe.Also, the cross section of the web member 4 is rectangle.

In the present embodiment, the diagonal brace 9 is rectangle sky steel pipe, and the diagonal brace 9 is in vertically to laying.And the diagonal brace 9 Cross section for square.

During practice of construction, the diagonal brace 9 is laid in the surface of bridge pier or abutment.

When actually used, the Concrete-Filled Rectangular Steel Tube Truss and prefabricated bridge 1 are connected by shear connector 5, can be effective Mutual sliding and the separation at linkage interface therebetween is prevented, the top boom 2-1 in the Concrete-Filled Rectangular Steel Tube Truss is made An entirety is constituted with prefabricated bridge 1, so as to reach the purpose of common stress.

In the present embodiment, each described longitudiual truss is in vertically to the plane girder laid, each described longitudinal purlin Frame includes together lower boom 3-1s of the top boom 2-1 with together with immediately below top boom 2-1, the top boom 2-1 and It is attached by web member 4 described in string between lower boom 3-1 immediately below which, web member 4 described in each column includes many Root is along vertical bridge to the web member 4 laid from front to back.

In the present embodiment, in the concrete-filled rectangular steel tube composite roof truss, the quantity of included longitudiual truss is two.Cause And, in the concrete-filled rectangular steel tube composite roof truss, the quantity of included top boom 2-1 and lower boom 3-1 is twice.

Also, the diagonal brace 9 is supported in the top boom 2-1 and another longitudiual truss of a longitudiual truss Between lower boom 3-1.

In the present embodiment, in the concrete-filled rectangular steel tube composite roof truss described in the adjacent twice in left and right between top boom 2-1 It is attached to the upper connecting rod 2-2 for laying from front to back along vertical bridge by multiple tracks, the concrete-filled rectangular steel tube combines purlin Bridge is indulged to the lower connecting rod 3-2 for laying from front to back by multiple tracks edge between lower boom 3-1 described in the adjacent twice in left and right in frame It is attached；The upper connecting rod 2-2 and lower connecting rod 3-2 are I-steel.

When actually used, the upper connecting rod 2-2 and lower connecting rod 3-2 can also adopt other types of shaped steel.

As shown in Fig. 3, Fig. 3-1, multigroup shear connector 5, each institute on top boom 2-1 described in per pass, are provided with from front to back State and on prefabricated bridge sections, be provided with the reserving hole installed for shear connector 5, the shear connector 5 is by pouring in described pre- The cast-in-place concrete structure 7 boxed out in hole is fastenedly connected with the prefabricated bridge sections and is integrated.

Along vertical bridge to laying from front to back, per group of shear connector 5 shares a preformed hole to multigroup shear connector 5 Hole, includes in per group of shear connector 5 that multiple to the WELDING STUDS laid, the WELDING STUDS is weldingly fixed on top boom in vertically On 2-1, the multiple rows of multiple row of the multiple described WELDING STUDS in per group of shear connector 5 point is laid.In per group of shear connector 5 Multiple WELDING STUDSs are poured in cast-in-place concrete structure 7.

In the present embodiment, the concrete filled steel tube includes rectangular steel pipe and pours in the rectangular steel pipe Pipe inner concrete structure, the PBL stiffeners 6 that the PBL puts more energy in type chord member are welded on the inwall of the rectangular steel pipe；It is described The PBL in top boom 2-1 puts more energy into type chord member and puts more energy into type top boom for PBL, and the PBL in the lower boom 3-1 puts more energy into Type chord member is put more energy into type lower boom for PBL, the PBL put more energy into rectangular steel pipe described in type top boom the inwall of both sides up and down on hang down PBL stiffeners 6 described in multiple tracks are laid with directly, the PBL puts more energy into described in type lower boom vertical cloth on the inwall of rectangular steel pipe It is provided with PBL stiffeners 6.

Also, all chord member sections in the lower boom 3-1 in addition to the PBL puts more energy into type chord member are rectangle sky steel Pipe.

As shown in figure 4, PBL stiffeners 6 described in the multiple tracks put more energy in type top boom of the PBL are in uniform laying, the PBL The PBL stiffeners 6 laid on the upper and lower both sides inwall of rectangular steel pipe described in type of putting more energy into top boom are in symmetrical laying；As shown in figure 5, The PBL put more energy into rectangular steel pipe described in type lower boom four medial walls in the middle part of vertical runs have a PBL to put more energy into Plate 6.

During practice of construction, can according to specific needs, to top boom 2-1 in the concrete-filled rectangular steel tube composite roof truss with The quantity of chord member 3-1 is adjusted accordingly respectively.Also, according to actual needs the PBL can also be put more energy in type top boom The quantity of PBL stiffeners 6 laid on the upper and lower both sides inwall of the rectangular steel pipe and the installation position of each PBL stiffeners 6 and The PBL put more energy into rectangular steel pipe described in type lower boom four medial walls on the quantity of laid PBL stiffeners 6 and each The installation position of PBL stiffeners 6 is adjusted accordingly respectively.

As shown in Fig. 3, Fig. 3-1, along vertical bridge to being provided with multiple tracks transverse prestress from front to back in the prefabricated bridge 1 Reinforcing bar 8-2, described in multiple tracks, transverse prestressed reinforcing steel bar 8-2 is laid in same level；The prefabricated bridge 1 is by multiple pre- Bridge floor plate segment processed is assembled from front to back, is connect by direction across bridge is wet in front and back between the two neighboring prefabricated bridge sections Seam 11 is attached, and the wet seam 11 of the direction across bridge is the wet seam of cast-in-place concrete；It is located in the prefabricated bridge 1 same The vertical bridge in multigroup edge is provided with the multiple described prefabricated bridge sections of hogging moment area to the longitudinal prestressing reinforcing bar 8-1 for laying, Multigroup longitudinal prestressing reinforcing bar 8-1 is laid in same level；Above the left and right sides of top boom 2-1 described in per pass Longitudinal prestressing reinforcing bar 8-1 described in one group is symmetrically laid with, per group of longitudinal prestressing reinforcing bar 8-1 includes multiple tracks along horizontal Bridge is to the longitudinal prestressing reinforcing bar 8-1 being laid in same level from left to right.

When actually used, the vertical bridge of the prefabricated bridge sections is 3m～5m to length.

In the present embodiment, the vertical bridge of the prefabricated bridge sections is 4m to length.When actual prefabricated, can be according to concrete need Will, the vertical bridge of the prefabricated bridge sections is adjusted accordingly to length.Also, installed on each described hogging moment area The quantity of prefabricated bridge sections is multiple.

In the present embodiment, it is provided with each described prefabricated bridge sections and in the wet seam of each described direction across bridge 11 Transverse prestressed reinforcing steel bar 8-2.

As shown in the above, the prefabricated bridge 1 arranges longitudinal prestressing reinforcing bar 8-1 and in full-bridge in hogging moment area Transverse prestressed reinforcing steel bar 8-2 is set, and prefabricated bridge 1 passes through the wet 11 insertion bridge floor of seam of direction across bridge.

During actually used, hogging moment region is floorings tension maximum region, thus is arranged in prefabricated bridge 1 There is longitudinal prestressing muscle 8-1 to resist longitudinal tension stress, prevent floorings from ftractureing.

During practice of construction, the across footpath of the assembled girder is 50m～80m.

In the present embodiment, in the assembled girder, the across footpath of each bridge is 60m.

During practice of construction, can according to specific needs, in the assembled girder, the across footpath of each bridge can also be 50m, 70m, 80m etc..During practice of construction, can according to specific needs, to the bridge bottom bracing structure middle girder lower support The installation position of the quantity of structure 10 and each girder bottom bracing structure 10 is adjusted respectively, and can be to the assembled In girder, the across footpath of each bridge is adjusted accordingly respectively.

In the present embodiment, the cross sectional dimensions of the adopted rectangular steel pipe of the top boom 2-1 are 700mm × 300mm, described Lay three road PBL stiffeners 6, and total length filling coagulation on the inwall of both sides up and down of rectangular steel pipe described in top boom 2-1 respectively Soil structure.The cross sectional dimensions of the adopted rectangular steel pipe of the lower boom 3-1 are 500mm × 500mm, in the lower boom 3-1 One PBL stiffener 6 fill concrete structure are set up on 4 medial walls of rectangular steel pipe only on hogging moment area respectively.

In the present embodiment, the cross sectional dimensions of the web member 4 are 500mm × 250mm, and the cross sectional dimensions of diagonal brace 9 are 500mm×500mm。

The size of the adopted I-steel of the upper connecting rod 2-2 is 200mm × 200mm × 12mm, the lower connecting rod 3-2 Size be 300mm × 300mm × 12.

During actually used, can according to specific needs, to the adopted rectangular steel pipe of top boom 2-1 and lower boom 3-1 Cross sectional dimensions, the cross sectional dimensions of web member 4 and diagonal brace 9 and the adopted I-steel of upper connecting rod 2-2 and lower connecting rod 3-2 Size is adjusted accordingly.

As shown in fig. 6, when constructing to this utility model, comprising the following steps：

Step one, the construction of bridge bottom bracing structure：The bridge bottom bracing structure is constructed, acquisition has been constructed Into multiple described girder bottom bracing structure 10；

Step 2, assembled girder assembling：Each bridge of the concrete-filled rectangular steel tube composite roof truss is entered respectively Row assembling, makes the rear and front end of each bridge respectively be set up on two adjacent girder bottom bracing structures 10, And adjacent two bridges assembly will be integrated in front and back, obtain the concrete-filled rectangular steel tube composite roof truss of construction molding；

Step 3, prefabricated bridge are installed：Install prefabricated on concrete-filled rectangular steel tube composite roof truss described in step 2 Floorings 1, and installed prefabricated bridge 1 is fixedly secured to by the concrete-filled rectangular steel tube composite roof truss by shear connector 5 On.

Also, when carrying out assembling to arbitrary bridge of the concrete-filled rectangular steel tube composite roof truss in step 2, both First can carry out that assembled (specifically multiple truss sections are carried out with installation on ground obtains should be across on the ground to the bridge Beam), then the bridge of assembled molding is set up on two adjacent girder bottom bracing structures 10 using hanging device； Can between two adjacent girder bottom bracing structures 10 to the bridge in multiple described truss sections distinguish It is assembled.

In the present embodiment, when assembly is carried out to arbitrary bridge, carry out assembly from span centre to both sides.

In the present embodiment, girder bottom bracing structure described in step one 10 is reinforced concrete structure.

Also, when the construction of bridge bottom bracing structure is carried out in step one, according to span of bridge to basis and bridge pier and bridge Platform is designed, and completes to pour and maintenance construction process.

In the present embodiment, concrete-filled rectangular steel tube composite roof truss described in step 2 is multispan beam, before and after each bridge Two ends are respectively set up on two adjacent girder bottom bracing structures 10, and each bridge is by the vertical bridge in multiple edges in the past The truss section assembling to rear laying is formed；

Before assembled girder assembling is carried out in step 2, first the concrete-filled rectangular steel tube group is completed in precasting yard The prefabrication process of the multiple described truss sections of truss is closed, recycles the prefabricated truss sections mixed to the rectangular steel pipe Each bridge of solidifying soil composite roof truss carries out assembly respectively；

Each bridge when assembled girder assembling is carried out in step 2, to the concrete-filled rectangular steel tube composite roof truss Set up respectively, make the rear and front end of each bridge respectively be set up in two adjacent girder bottom bracing structures 10 On, and adjacent two bridges assembly will be integrated in front and back.

Also, when carrying out prefabricated to the multiple described truss sections of the concrete-filled rectangular steel tube composite roof truss, to each The shear connector 5 laid on top boom 2-1 in the truss sections is fixed respectively；

Before prefabricated bridge installation is carried out in step 3, the first institute in the precasting yard completes the prefabricated bridge 1 There is a prefabrication process of bridge floor plate segment, and transverse prestressed reinforcing steel bar 8-2 set in the bridge floor plate segment is carried out wearing, Tensioning and anchoring.

Carry out in step 3 prefabricated bridge install when, to the prefabricated bridge 1 in multiple described prefabricated bridge Sections is installed respectively, until completing the assembled process of 1 all prefabricated bridge sections of prefabricated bridge, and completes adjacent two The work progress of the wet seam of direction across bridge 11 between the individual prefabricated bridge sections；

Carry out in step 3 in prefabricated bridge installation process, be pointed to the multiple described floorings of any one hogging moment area When sections is installed, after the completion for the treatment of to be respectively mounted positioned at the multiple described bridge floor plate segment of the hogging moment area, this is pointed to negative curved The multigroup described longitudinal prestressing reinforcing bar 8-1 arranged on the multiple described prefabricated bridge sections in square area is worn respectively；It Afterwards, be pointed to the hogging moment area before and after the wet seam of direction across bridge between the two neighboring prefabricated bridge sections 11 enter respectively Row construction；Multigroup described longitudinal prestressing reinforcing bar to being arranged on the multiple described prefabricated bridge sections of the hogging moment area again 8-1 carries out tensioning respectively with anchoring.

In the present embodiment, when prefabricated bridge installation is carried out in step 3, to the prefabricated bridge section in each bridge Section is installed respectively, and the prefabricated bridge sections in arbitrary bridge is installed, and is divided from span centre to both sides Do not installed.

In the present embodiment, transverse prestressed reinforcing steel bar 8-2 is provided with as the wet seam 11 of direction across bridge is interior, thus it is wet to direction across bridge Before seam 11 is constructed, first the transverse prestressed reinforcing steel bar 8-2 in the wet seam of direction across bridge 11 is worn；Treat that direction across bridge is wet After 11 concrete strength of seam reaches tensioning requirement, then the seam 11 interior transverse prestressed reinforcing steel bar 8-2 that wear wet to the direction across bridge Carry out tensioning and anchoring.

Also, when being pointed to the multiple described bridge floor plate segment of any one hogging moment area and being installed, first wait to be arranged in this After the equal tensioning of multigroup described longitudinal prestressing reinforcing bar 8-1 and anchoring on the multiple described prefabricated bridge sections of hogging moment area, Be pointed to again the hogging moment area before and after horizontal stroke in the wet seam of direction across bridge between the two neighboring prefabricated bridge sections 11 Tensioning and anchoring are carried out to deformed bar 8-2.

Thus, all transverse prestressed reinforcing steel bar 8-2 and longitudinal prestressing reinforcing bar 8-1 in the prefabricated bridge 1 are adopted Constructed with post stretching, and adopted wear, tensioning and anchoring process are the wearing of conventional deformed bar, tensioning With anchoring construction method.Also, treat the equal tensioning of all transverse prestressed reinforcing steel bar 8-2 in the prefabricated bridge 1 and anchored Cheng Hou, needs in the left and right sides of prefabricated bridge 1, indulge bridge to casting concrete and form vertical concrete structure 12 respectively by edge, To protect to the installed anchorage of transverse prestressed reinforcing steel bar 8-2 and end.

The above, is only preferred embodiment of the present utility model, not this utility model is imposed any restrictions, every Any simple modification, change and equivalent structure change above example made according to this utility model technical spirit, still Belong in the protection domain of technical solutions of the utility model.

Claims (10)

1. a kind of assembled concrete-filled rectangular steel tube combines truss bridge, it is characterised in that：Including bridge bottom bracing structure, support In the assembled girder on the bridge bottom bracing structure and the prefabricated bridge (1) on the assembled girder, The bridge bottom bracing structure includes the vertical bridge in multiple edges to the girder bottom bracing structure (10) laid from front to back, the dress With formula girder be concrete-filled rectangular steel tube composite roof truss and its be attached by shear connector (5) between prefabricated bridge (1)； The concrete-filled rectangular steel tube composite roof truss assembled, multiple longitudinal purlins from the vertical bridge in multiple edges to the longitudiual truss laid Frame is laid from left to right side by side along direction across bridge, each described longitudiual truss by top boom (2-1), be laid in top boom (2-1) The lower boom (3-1) of lower section and web member (4) composition being connected between top boom (2-1) and lower boom (3-1), the top boom (2-1) with lower boom (3-1) is in horizontal layout and the two vertical bridge in edge is to laying；Each described girder bottom bracing structure (10) the direction across bridge supporting construction for intersecting that by twice the diagonal brace (9) laid is constituted, the diagonal brace (9) are provided with directly over Support between top boom (2-1) and lower boom (3-1)；The concrete-filled rectangular steel tube composite roof truss is from the vertical bridge in edge to from front to back The multiple truss sections laid are assembled, the top boom (2-1) and lower boom (3-1) by multiple chord member sections the past extremely After be spliced, in all chord member sections and the lower boom (3-1) in the top boom (2-1) positioned at hogging moment area institute There is chord member sections to be PBL to put more energy into type chord member, PBL type chord members of putting more energy into include concrete filled steel tube and along vertical bridge to laying PBL stiffeners (6) in the concrete filled steel tube, the PBL stiffeners (6) are strip open pore steel plate.

2. according to the assembled concrete-filled rectangular steel tube combination truss bridge described in claim 1, it is characterised in that：The lower boom (3-1) all chord member sections in addition to the PBL puts more energy into type chord member are sky steel pipe.

3. according to the assembled concrete-filled rectangular steel tube combination truss bridge described in claim 1 or 2, it is characterised in that：Each institute State longitudiual truss to be in vertically to the plane girder laid, each described longitudiual truss includes the top boom (2- together 1) with together be located at top boom (2-1) immediately below lower boom (3-1), the top boom (2-1) be located at its immediately below under Be attached by web member (4) described in string between chord member (3-1), web member described in each column (4) including many along vertical bridge to The web member (4) laid from front to back.

4. according to the assembled concrete-filled rectangular steel tube combination truss bridge described in claim 1 or 2, it is characterised in that：The square Bridge is indulged in the past extremely by multiple tracks edge between top boom (2-1) described in the adjacent twice in left and right in shape concrete filled steel tube composite roof truss The upper connecting rod (2-2) laid afterwards is attached, in the concrete-filled rectangular steel tube composite roof truss described in the adjacent twice in left and right under It is attached to the lower connecting rod (3-2) laid from front to back along vertical bridge by multiple tracks between chord member (3-1)；The upper connection Bar (2-2) and lower connecting rod (3-2) are I-steel；

The girder being supported in the bridge bottom bracing structure below the concrete-filled rectangular steel tube composite roof truss rear and front end Bottom bracing structure (10) is end support structure, the institute in the bridge bottom bracing structure in addition to the end support structure Have girder bottom bracing structure (10) to be medial support structures, in the concrete-filled rectangular steel tube composite roof truss be located at it is described in Between region above supporting construction be the hogging moment area.

5. according to the assembled concrete-filled rectangular steel tube combination truss bridge described in claim 1 or 2, it is characterised in that：The steel Pipe concrete structure includes rectangular steel pipe and the pipe inner concrete structure poured in the rectangular steel pipe, and the PBL puts more energy into type PBL stiffeners (6) in chord member are welded on the inwall of the rectangular steel pipe；The PBL in the top boom (2-1) puts more energy into Type chord member is put more energy into type top boom for PBL, and the PBL in the lower boom (3-1) puts more energy into type chord member and puts more energy into type lower edge for PBL Bar, the PBL put more energy into rectangular steel pipe described in type top boom the inwall of both sides up and down on vertical runs have PBL described in multiple tracks to add Strength plate (6), the PBL puts more energy into described in type lower boom, and on the inwall of rectangular steel pipe, equal vertical runs have PBL stiffeners (6)；

All chord member sections in the lower boom (3-1) in addition to the PBL puts more energy into type chord member are rectangle sky steel pipe.

6. according to the assembled concrete-filled rectangular steel tube combination truss bridge described in claim 5, it is characterised in that：The PBL adds In uniform laying, PBL's PBL stiffeners (6) described in multiple tracks in strength type top boom puts more energy into rectangle steel described in type top boom The PBL stiffeners (6) laid on upper and lower both sides inwall are managed in symmetrical laying；The PBL puts more energy into rectangle steel described in type lower boom In the middle part of four medial walls of pipe, equal vertical runs have a PBL stiffener (6).

7. according to the assembled concrete-filled rectangular steel tube combination truss bridge described in claim 1 or 2, it is characterised in that：It is described pre- Along vertical bridge to being provided with multiple tracks transverse prestressed reinforcing steel bar (8-2), transverse prestress described in multiple tracks from front to back in floorings (1) processed Reinforcing bar (8-2) is laid in same level；The prefabricated bridge (1) is spelled from front to back by multiple prefabricated bridge sections Dress is formed, and is attached by the wet seam of direction across bridge (11) in front and back, the horizontal stroke between the two neighboring prefabricated bridge sections Bridge is the wet seam of cast-in-place concrete to wet seam (11)；Positioned at the multiple of same hogging moment area in the prefabricated bridge (1) The vertical bridge in multigroup edge is provided with the prefabricated bridge sections to the longitudinal prestressing reinforcing bar (8-1) laid, multigroup longitudinal direction Deformed bar (8-1) is laid in same level；Symmetrical cloth above the left and right sides of top boom described in per pass (2-1) Longitudinal prestressing reinforcing bar (8-1) described in one group is provided with, per group of longitudinal prestressing reinforcing bar (8-1) includes multiple tracks along direction across bridge The longitudinal prestressing reinforcing bar (8-1) being laid in same level from left to right.

8. according to the assembled concrete-filled rectangular steel tube combination truss bridge described in claim 7, it is characterised in that：On described in per pass It is provided with multigroup shear connector (5) on chord member (2-1) from front to back, is provided with each described prefabricated bridge sections for cutting The reserving hole that power key (5) is installed, the shear connector (5) is by pouring the cast-in-place concrete structure in the reserving hole (7) it is fastenedly connected with the prefabricated bridge sections and is integrated.

9. according to the assembled concrete-filled rectangular steel tube combination truss bridge described in claim 1 or 2, it is characterised in that：The abdomen Bar (4) and diagonal brace (9) are rectangle sky steel pipe, and the diagonal brace (9) is in vertically to laying.

10. according to the assembled concrete-filled rectangular steel tube combination truss bridge described in claim 1 or 2, it is characterised in that：The dress Across footpath with formula girder is 50m～80m.