CN113605217A - Structure of bridge abutment and roadbed joint and construction method - Google Patents

Structure of bridge abutment and roadbed joint and construction method Download PDF

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Publication number
CN113605217A
CN113605217A CN202110772931.3A CN202110772931A CN113605217A CN 113605217 A CN113605217 A CN 113605217A CN 202110772931 A CN202110772931 A CN 202110772931A CN 113605217 A CN113605217 A CN 113605217A
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China
Prior art keywords
bridge
abutment
pipe
roadbed
grouting
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CN202110772931.3A
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CN113605217B (en
Inventor
张建国
姚辉
张路泽
郭佳逸
毛衡磊
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Tongxin Eco Environment Technology Co ltd
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Tongxin Eco Environment Technology Co ltd
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/02Piers; Abutments ; Protecting same against drifting ice
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C3/00Foundations for pavings
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C3/00Foundations for pavings
    • E01C3/04Foundations produced by soil stabilisation
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/60Planning or developing urban green infrastructure

Abstract

The application relates to a structure and a construction method of a joint of a bridge abutment and a roadbed of a bridge, relating to the technical field of bridge construction; the bridge pier comprises a plurality of pier columns, bearing platforms arranged at the lower end of each pier column, a capping beam arranged at the upper end of each pier column, and a bridge abutment arranged between every two adjacent bearing platforms; the two ends of each bridge abutment are provided with extension inserting plates, the upper surface of the bearing platform is provided with a slot for each extension inserting plate to insert, and a fixing component for stably inserting the extension inserting plate into the slot is arranged at the position, close to the slot, of each bridge abutment; this application has and strengthens being connected the steadiness between abutment and the bent cap, improves the effect of bridge overall structure intensity.

Description

Structure of bridge abutment and roadbed joint and construction method
Technical Field
The application relates to the technical field of bridge construction, in particular to a structure and a construction method of a joint of a bridge abutment and a roadbed of a bridge.
Background
The bridge is generally a structure erected on rivers, lakes and seas to enable vehicles, pedestrians and the like to smoothly pass through, and is suitable for the modern high-speed developed traffic industry.
A related Chinese patent with the publication number of CN207878252U discloses a prefabricated bridge girder, which comprises a plurality of pairs of prefabricated bridge piers vertically arranged, each pair of prefabricated bridge piers is erected with a prefabricated capping beam, a prefabricated girder section is erected vertically between the adjacent prefabricated capping beams, wherein the prefabricated girder section is formed by mutually splicing a plurality of parallel panels; during construction, the prefabricated capping beams are erected on each pair of prefabricated piers, and then the prefabricated beam sections are erected among the prefabricated capping beams, so that the construction of the bridge is realized.
In view of the above related technologies, the inventor considers that the connection structure between the two adjacent precast beam segments and the precast capping beam is not stable enough, and is prone to causing the relative position of the adjacent precast bridges to shift or even crack under the influence of vibration force of an external environment, such as an earthquake, which affects the safety of the use of the bridges, and thus needs to be improved.
Disclosure of Invention
In order to improve the technical problem that the structural stability of a prefabricated bridge is poor in the related art, the application provides a structure and a construction method of a bridge abutment and roadbed joint.
The application provides a pair of bridge abutment and structure of road bed junction of bridge adopts following technical scheme:
a structure at the joint of a bridge abutment and a roadbed of a bridge comprises a plurality of pier studs, bearing platforms arranged at the lower ends of the pier studs, a capping beam arranged at the upper end of each pier stud and a bridge abutment arranged between two adjacent bearing platforms; each abutment both ends all are provided with the extension picture peg, the cushion cap upper surface is provided with the slot that supplies each extension picture peg to insert the establishment, each the abutment is close to slot department and all is provided with the fixed subassembly that is used for firmly inserting the extension picture peg and locates in the slot.
Through adopting above-mentioned technical scheme, will extend the picture peg through fixed subassembly and firmly insert and locate the slot in to reduce the condition that the abutment squinted along its length direction, realize the firm connection of abutment and bent cap, also can reduce the condition that the skew appears in adjacent abutment position simultaneously.
Optionally, each abutment tip all is provided with a plurality of extension picture peg, and adjacent abutment is the extension picture peg of near each other crisscross inserting of slot of locating, and each the lateral wall of the extension picture peg in the slot is laminated each other.
By adopting the technical scheme, the contact area of the end parts of the adjacent bridge abutments is increased, and the connection tightness between the two adjacent bridge abutments is enhanced.
Optionally, fixed subassembly includes the apron, runs through to insert and locates apron wherein the slip casting pipe of one end to and run through to insert and locate the play thick liquid pipe of the apron other end, each extend the picture peg upper surface and all seted up and supply the apron to insert the breach of stepping down of establishing, each extend the picture peg end wall and all run through and seted up the slip casting hole, inside the offering of bent cap supplies the slip casting pipe to insert the first fixed orifices of establishing to and supply the slip casting pipe to insert the second fixed orifices of establishing, first fixed orifices, second fixed orifices, slip casting hole communicate each other.
Through adopting above-mentioned technical scheme, to slip casting pipe department injection cement mortar, cement mortar flows into first fixed orifices to full all slip casting holes, finally flow to second fixed orifices, when cement mortar flows to play thick liquid pipe mouth department, can stop the injection to cement mortar, after cement mortar solidifies the shaping, extend the picture peg and firmly insert and locate in the slot.
Optionally, each it all inserts and is equipped with the fender thick liquid pipe to extend the picture peg and be close to slip casting hole department, it slides along slip casting hole length direction to keep off the thick liquid pipe end wall, and is adjacent it laminates each other to keep off the thick liquid pipe end wall, bent cap inside is provided with and is used for driving each slide pipe and slides to the drive assembly of two adjacent extension picture peg seams department.
Through adopting above-mentioned technical scheme, drive each fender thick liquid pipe through drive assembly and slide along slip casting hole length direction to remove to the seam crossing of two adjacent extension picture pegs, then to the downthehole grout injection of slip casting, reduce the thick liquids and spill over from the seam crossing of two adjacent extension picture pegs, spill over to the abutment surface from the seam crossing of apron and the breach of stepping down again, and then aggravate constructor's clearance burden.
Optionally, a grouting cavity and a grout outlet cavity are formed in the bridge abutment, the grouting cavity is located between the first fixing hole and the slot, and the grouting cavity is located between the slot and the second fixing hole; the driving assembly comprises a sliding pipe inserted into the grouting chamber, one end of the sliding pipe is attached to the end wall of the grout blocking pipe close to the sliding pipe, a butt joint inclined plane is arranged at the other end of the sliding pipe, and the lower end of the grouting pipe is provided with a butt joint inclined plane matched with the butt joint inclined plane.
Through adopting above-mentioned technical scheme, when the slip casting pipe inserted in the slip casting cavity, the slip casting pipe was supported to the end wall that is close to butt inclined plane department and is pressed the slide, and butt inclined plane laminate mutually this moment, and the slide removes and supports to push away the slip casting pipe and remove to the seam crossing of two adjacent extension picture pegs towards the direction of keeping away from the slip casting pipe.
Optionally, the sidewall of the slip casting pipe is provided with a plurality of flow-assisting through holes in a penetrating manner.
Through adopting above-mentioned technical scheme, the setting of class of flowing aid through-hole can make cement mortar let in the slide pipe from first fixed orifices fast and moving to the slip casting downthehole, reduces because of slip casting pipe and slide pipe wall contact and lead to the condition that cement thick liquids remove slowly, improves the efficiency of construction.
Optionally, the driving assembly further comprises a sliding block fixedly connected to the outer side wall of the sliding pipe and the outer side wall of each slurry blocking pipe, the driving assembly further comprises a limiting spring welded to the side wall of each sliding block, the inner wall of the grouting cavity and the inner wall of the grouting hole are both provided with a sliding groove for the sliding block to insert, and the limiting spring is fixedly connected between the inner wall of the sliding groove and the side wall of the sliding block.
By adopting the technical scheme, when the limiting spring is in an initial state, the slurry blocking pipe is completely inserted into the grouting hole, the end wall of the slurry blocking pipe is flush with the end wall of the extension plug board, one end, far away from the butt joint inclined plane, of the sliding pipe is flush with the end wall of the sliding hole, one end, close to the butt joint inclined plane, of the sliding pipe is inserted into the first fixing hole, so that the sliding pipe and the slurry blocking pipe are fixed through the sliding block and the limiting spring, the slurry blocking pipe is stably inserted into the grouting hole, and the sliding pipe is stably inserted into the sliding hole.
Optionally, a support assembly is further arranged on the lower surface of each abutment, and the support assembly comprises a support frame, a triangular block arranged on the upper end surface of the support frame, and a support base arranged at the lower end of the support frame; one right-angle side of the triangular block is fixedly connected to the lower surface of the abutment, and the other right-angle side of the triangular block is attached to the side wall of the bent cap; the supporting base is fixedly connected to the upper surface of the bearing platform.
Through adopting above-mentioned technical scheme, the supporting role to the abutment can be strengthened in setting up of supporting component, realizes the firm connection of abutment and cushion cap, reduces the condition that leads to the pier to weaken to the support intensity of abutment because of the pier is damaged, improves bridge overall structure's stability.
Optionally, the upper surface of each bearing platform is symmetrically provided with a connecting rod, the lower surface of each supporting base is provided with a connecting groove for the connecting rod to be inserted, a capsule body containing glue is inserted into the butt-joint groove, and the side wall of the connecting rod is provided with a piercing rod for piercing the capsule body.
By adopting the technical scheme, when the abutment moves downwards and is placed between the two bearing platforms, the supporting base is placed on the upper surface of the bearing platform, the connecting rod is inserted into the connecting groove, the piercing rod pierces the capsule body, and the glue moves to the seam between the supporting base and the bearing platform, so that the fixed connection between the supporting base and the bearing platform is realized.
Optionally, a construction method adopted by a structure at a joint of a bridge abutment and a roadbed of a bridge includes the following steps:
s1, installing a bearing platform, pier studs and cover beams according to construction requirements, hanging the two bridge platforms above the bearing platform, enabling the extension inserting plates on the two bridge platforms to be inserted into the slots together, and covering the cover plates in the abdicating notches;
s2, cement mortar is injected into the grouting pipe, the cement mortar flows into the slip pipe and then flows into the slurry blocking pipe, finally flows into the slurry outlet pipe through the second fixing hole, grouting is stopped when the cement is fully injected to the upper pipe orifice of the slurry outlet pipe, and after the cement mortar is solidified and formed, the extension inserting plate is stably inserted into the inserting groove, so that connection of adjacent bridge abutments is achieved.
Through adopting above-mentioned technical scheme, realize being connected between abutment and the cushion cap through setting up extension picture peg and slot, then fix the position of extending the picture peg through the apron, come further through to the slip casting in the slot and will extend the picture peg and firmly insert and locate the slot in, realize two adjacent abutments and the firm connection of cushion cap.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the extending insertion plates are stably inserted into the slots through the fixing assemblies, so that the condition that the abutment deviates along the length direction of the abutment is reduced, the abutment and the cover beam are stably connected, and the condition that the positions of adjacent abutments deviate can be reduced;
2. cement mortar is injected into the grouting pipe, the cement mortar flows into the first fixing hole and fills all the grouting holes and finally flows into the second fixing hole, when the cement mortar flows to the pipe orifice of the grout outlet pipe, the injection of the cement mortar can be stopped, and after the cement mortar is solidified and formed, the extension inserting plate is stably inserted into the inserting groove;
3. the supporting effect to the abutment can be strengthened in supporting component's setting, realizes the firm connection of abutment and cushion cap, reduces the condition that leads to the pier to weaken the support intensity of abutment because of the pier is damaged, improves bridge overall structure's stability.
Drawings
Fig. 1 is a schematic view of a structure of a bridge abutment and roadbed combination of a bridge in the embodiment.
Fig. 2 is a sectional view of a structure at a junction of an abutment and a roadbed of a bridge in an embodiment.
Fig. 3 is an enlarged schematic view of the structure of part a in fig. 2.
Fig. 4 is an exploded view of the structure used to embody the abutment-subgrade junction of a bridge in the example.
Fig. 5 is a sectional view for embodying the structure of the fixing member in the embodiment.
Description of reference numerals: 1. a bearing platform; 11. a connecting rod; 111. pricking a rod; 12. pier studs; 13. a capping beam; 131. a slot; 132. a first fixing hole; 135. a second fixing hole; 133. a grouting chamber; 134. a slurry outlet chamber; 14. an abutment; 141. an extension inserting plate; 141. grouting holes; 1411. a chute; 142. a slurry blocking pipe; 143. a abdication gap; 15. a drive assembly; 151. a slide pipe; 1511. butting the inclined planes; 152. a slider; 153. a limiting spring; 2. a fixing assembly; 21. a cover plate; 22. a grouting pipe; 221. a flow-aiding through hole; 222. abutting against the inclined plane; 23. a pulp outlet pipe; 3. a support assembly; 31. a support frame; 32. a triangular block; 33. a support base; 331. connecting grooves; 332. and (3) a capsule body.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses a structure at the junction of a bridge abutment and a roadbed of a bridge. Referring to fig. 1 and 2, the structure at the junction between the abutment and the roadbed of the bridge comprises a plurality of bearing platforms 1, piers 12 vertically cast on the upper surface of each bearing platform 1, capping beams 13 vertically cast on the upper surface of each pier 12, and an abutment 14 arranged between two adjacent capping beams 13; the bearing platform 1, the pier stud 12, the cover beam 13 and the abutment 14 are all prefabricated by UHPC materials.
Referring to fig. 1 and 2, each abutment 14 lower surface all is provided with supporting component 3, and supporting component 3 is including being the support frame 31 of "X" shape, integrated into one piece in the three hornblocks 32 of support frame 31 upper end to and integrated into one piece in the support base 33 of support frame 31 lower extreme, and one of them right-angle side of each three hornblocks 32 all passes through bolt fixed connection in abutment 14 lower surface, and another right-angle side laminating of three hornblocks 32 is in cushion cap 1 lateral wall.
Referring to fig. 1 and 3, the lower surface of the supporting base 33 is attached to the upper surface of the platform 1, the connecting rods 11 are integrally formed on the upper surface of the platform 1 near each supporting base 33, the lower surface of the supporting base 33 is provided with a connecting groove 331 for the connecting rods 11 to be inserted, a capsule body 332 is inserted into the connecting groove 331, and the capsule body 332 comprises glue and a plastic film for containing the glue; the side wall of each connecting rod 11 is integrally formed with a piercing rod 111 for piercing the capsule body 332, when the supporting base 33 is attached to the upper surface of the platform 1, the connecting rod 11 is inserted into the connecting groove 331, and the piercing rod 111 pierces the capsule body 332, and the glue flows to the joint between the supporting base 33 and the platform 1, so as to fix the supporting base 33 and the platform 1.
Referring to fig. 4 and 5, a plurality of extension insertion plates 141 are respectively integrally formed on end walls at two ends of each bridge abutment 14, slots 131 are formed in the upper surface of the cover beam 13, the extension insertion plates 141 near two adjacent bridge abutments 14 are jointly inserted into the same slot 131, and the extension insertion plates 141 near the adjacent bridge abutments 14 are distributed in the slots 131 in a staggered manner; each extending insertion plate 141 end wall is provided with a grouting hole 141 along the length direction thereof in a penetrating manner, a slurry blocking pipe 142 is inserted at the position of each extending insertion plate 141 close to the grouting hole 141, and the slurry blocking pipe 142 end wall is flush with the extending insertion plate 141 end wall.
Referring to fig. 2 and 4, a fixing assembly 2 is arranged above the extension inserting plate 141, and the fixing assembly 2 comprises a cover plate 21, a grouting pipe 22 and a grout outlet pipe 23; the upper surface of the extension inserting plate 141 is provided with a yielding notch 143 for the cover plate 21 to be inserted, and when the cover plate 21 is inserted into the yielding notch 143, the upper surface of the cover plate 21 is flush with the upper surface of the abutment 14; two ends of the cover plate 21 extend to the outside of the bridge abutment 14, the grouting pipe 22 is inserted into one end of the cover plate 21 in a penetrating manner, and the grout outlet pipe 23 is inserted into the other end of the cover plate 21 in a penetrating manner.
Referring to fig. 5, the upper surface of the bent cap 13 is provided with a first fixing hole 132 for inserting the grouting pipe 22, the upper surface of the bent cap 13 is further provided with a second fixing hole 135 for inserting the grout outlet pipe 23, and the first fixing hole 132 and the second fixing hole 135 are both arranged along the vertical direction; a grouting chamber 133 is further formed in the cover beam 13, the grouting chamber 133 is located between the first fixing hole 132 and the slot 131, and the grouting chamber 133, the first fixing hole 132 and the slot 131 are communicated; the cover beam 13 is further provided with a slurry outlet chamber 134, the slurry outlet chamber 134 is located between the slot 131 and the second fixing hole 135, and the slurry outlet chamber 134, the second fixing hole 135 and the slot 131 are communicated.
Referring to fig. 5, the driving assembly 15 is disposed inside the capping beam 13, the driving assembly 15 includes a slide tube 151 inserted into the grouting chamber 133, fixedly welded to an outer sidewall of the slide tube 151, a sliding block 152 on the outer side wall of each grout blocking pipe 142, and a limit spring 153 welded on the side wall of each sliding block 152, wherein sliding grooves 1411 are formed in the inner wall of the grouting chamber 133 and the inner wall of each grouting hole 141, the sliding grooves 1411 are arranged along the length direction of the grouting holes 141, the sliding blocks 152 and the limit springs 153 are inserted into the sliding grooves 1411, and one end of the limiting spring 153 far away from the sliding block 152 is fixedly adhered to the inner wall of the sliding chute 1411, when the limiting spring 153 is in the initial state, the grout stop pipe 142 is completely inserted into the grouting hole 141, and two end walls of the grout stop pipe 142 are flush with the end walls of the extension insertion plate 141, one end of the sliding tube 151 is attached to the end wall of the slurry blocking tube 142 close to the sliding tube, and the other end of the sliding tube 151 is inserted into the first fixing hole 132.
Referring to fig. 2 and 4, the end wall of the slide pipe 151 near the first fixing hole 132 is provided with a butt inclined surface 1511, the lower end of the grouting pipe 22 is provided with a butt inclined surface 222 attached to the butt inclined surface 1511, and the sidewall of the grouting pipe 22 near the lower end is provided with a plurality of flow assisting through holes 221 in a penetrating manner; when the grouting pipe 22 is inserted into the first fixing hole 132, the abutting inclined surface 1511 is attached to the abutting inclined surface 222, at this time, the grouting pipe 22 abuts against the sliding pipe 151, so that the sliding pipe 151 moves towards the direction close to the slot 131, the sliding pipe 151 abuts against the slurry blocking pipe 142 in contact with the sliding pipe, the limiting spring 153 deforms, all the slurry blocking pipes 142 move towards the position close to the slurry outlet chamber 134 in sequence, the slurry blocking pipes 142 move to the joint of the adjacent extension insertion plates 141, the slurry blocking pipes 142 close to the slurry outlet chamber 134 move into the slurry outlet chamber 134, and the slurry outlet pipes 23 are inserted into the second fixing holes 135.
A construction method adopted by a structure at a joint of a bridge abutment and a roadbed of a bridge comprises the following steps:
s1, installing the bearing platform 1, the pier stud 12 and the cover beam 13 according to construction requirements, hanging the two abutment platforms 14 above the bearing platform 1, enabling the extension inserting plates 141 on the two abutment platforms 14 to be inserted into the inserting grooves 131 together, and covering the cover plate 21 in the abdicating notch 143;
s2, cement mortar is injected into the grouting pipe 22, flows into the sliding pipe 151, then flows into the grout blocking pipe 142, and finally flows into the grout outlet pipe 23 through the second fixing hole 135, grouting is stopped when cement is grouted to the upper pipe orifice of the grout outlet pipe 23, and after the cement mortar is solidified and formed, the extension inserting plate 141 is stably inserted into the inserting groove 131, so that connection of adjacent bridge abutments 14 is achieved.
The implementation principle of the structure at the junction of the bridge abutment and the roadbed of the bridge is as follows: firstly, installing bearing platforms 1, piers 12 and capping beams 13 according to construction requirements, then hoisting an abutment 14 between two bearing platforms 1 by using a hoisting tool, so that an extension inserting plate 141 is inserted into an inserting groove 131, a supporting frame 31 is inserted between two adjacent piers 12 at the moment, and a supporting base 33 is fixedly adhered to the upper surface of the bearing platform 1; then, the extension inserting plate 141 on the other bridge abutment 14 is inserted into the slot 131, and at this time, the adjacent extension inserting plates 141 are inserted into the slot 131 in a staggered manner;
then, the cover plate 21 is covered in the abdicating notch 143, cement mortar is injected into the grouting pipe 22, the cement mortar flows out through the flow-aiding through hole 221 and flows into the sliding pipe 151, then flows into the grout blocking pipe 142 from the sliding pipe 151, and finally flows into the grout outlet pipe 23 through the second fixing hole 135, when the cement grout is filled to the upper nozzle of the grout outlet pipe 23, grouting is stopped, and after the cement mortar is solidified and formed, the extension inserting plate 141 is stably inserted into the inserting groove 131, so that stable connection of the adjacent bridge abutment 14 is realized.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. A structure of a joint of a bridge abutment and a roadbed of a bridge comprises a plurality of pier studs (12), bearing platforms (1) arranged at the lower end of each pier stud (12), a cover beam (13) arranged at the upper end of each pier stud (12), and bridge abutments (14) arranged between two adjacent bearing platforms (1); the method is characterized in that: each abutment (14) both ends all are provided with extension picture peg (141), cushion cap (1) upper surface is provided with and supplies each to extend picture peg (141) and insert slot (131) of establishing, each abutment (14) are close to slot (131) department and all are provided with and are used for extending picture peg (141) and firmly insert fixed subassembly (2) of locating in slot (131).
2. The structure of a junction between an abutment and a roadbed of a bridge according to claim 1, wherein: each abutment (14) tip all is provided with a plurality of extension picture peg (141), and adjacent abutment (14) extension picture peg (141) near each other are crisscross to be inserted and are located slot (131), and each the lateral wall of extension picture peg (141) in slot (131) laminates each other.
3. The structure of a junction between an abutment and a roadbed of a bridge as claimed in claim 2, wherein: the fixed assembly (2) comprises a cover plate (21), a grouting pipe (22) which is inserted into one end of the cover plate (21) in a penetrating manner, and a grout outlet pipe (23) which is inserted into the other end of the cover plate (21) in a penetrating manner; each extend picture peg (141) upper surface and all offer and supply apron (21) to insert breach of stepping down (143) of establishing, each extend picture peg (141) end wall and all run through and seted up slip casting hole (141), bent cap (13) inside is seted up and is supplied slip casting pipe (22) to insert first fixed orifices (132) of establishing to and supply out slip casting pipe (23) to insert second fixed orifices (135) of establishing, first fixed orifices (132), second fixed orifices (135), slip casting hole (141) communicate each other.
4. The structure of a junction between an abutment and a roadbed of a bridge as claimed in claim 3, wherein: each extend picture peg (141) and all insert near slip casting hole (141) department and be equipped with fender thick liquid pipe (142), keep off thick liquid pipe (142) and slide along slip casting hole (141) length direction, and adjacent keep off thick liquid pipe (142) end wall and laminate each other, bent cap (13) inside is provided with and is used for driving each slide pipe (151) to slide to adjacent two drive assembly (15) that extend picture peg (141) seam crossing.
5. The structure of a junction between an abutment and a roadbed of a bridge as claimed in claim 4, wherein: a grouting chamber (133) and a grout outlet chamber (134) are formed in the bridge abutment (14), the grouting chamber (133) is located between the first fixing hole (132) and the slot (131), and the grouting chamber (133) is located between the slot (131) and the second fixing hole (135); the driving assembly (15) comprises a sliding pipe (151) inserted into the grouting cavity (133), one end of the sliding pipe (151) is attached to the end wall of the grout blocking pipe (142) close to the sliding pipe, the other end of the sliding pipe (151) is provided with a butt joint inclined plane (1511), and the lower end of the grouting pipe (22) is provided with a butt joint inclined plane (222) matched with the butt joint inclined plane (1511).
6. The structure of a junction between an abutment and a roadbed of a bridge as claimed in claim 5, wherein: the side wall of the grouting pipe (22) is provided with a plurality of flow-assisting through holes (221) in a penetrating manner.
7. The structure of a junction between an abutment and a roadbed of a bridge as claimed in claim 6, wherein: drive assembly (15) still include slider (152) of fixed connection in slide pipe (151) lateral wall, each fender thick liquid pipe (142) lateral wall, drive assembly (15) still including weld in spacing spring (153) of each slider (152) lateral wall, slip casting cavity (133) inner wall to and slip casting hole (141) inner wall all offer supply slider (152) to insert spout (1411) of establishing, spacing spring (153) fixed connection is between spout (1411) inner wall and slider (152) lateral wall.
8. The structure of a junction between an abutment and a roadbed of a bridge according to claim 1, wherein: the lower surface of each bridge abutment (14) is also provided with a support assembly (3), and each support assembly (3) comprises a support frame (31), a triangular block (32) arranged on the upper end surface of each support frame (31), and a support base (33) arranged at the lower end of each support frame (31); one right-angle side of the triangular block (32) is fixedly connected to the lower surface of the bridge abutment (14), and the other right-angle side of the triangular block (32) is attached to the side wall of the bent cap (13); the supporting base (33) is fixedly connected to the upper surface of the bearing platform (1).
9. The structure of a junction between an abutment and a roadbed of a bridge as claimed in claim 8, wherein: each bearing platform (1) is symmetrically provided with connecting rods (11) on the upper surface, the lower surface of each supporting base (33) is provided with connecting grooves (331) for the connecting rods (11) to be inserted, capsule bodies (332) filled with glue are inserted into the butt-joint grooves, and the side walls of the connecting rods (11) are provided with piercing rods (111) for piercing the capsule bodies (332).
10. The construction method for a structure at a junction of a bridge abutment and a roadbed according to any one of claims 1 to 7, comprising the steps of:
s1, installing the bearing platform (1), the pier stud (12) and the cover beam (13) according to construction requirements, hanging the two bridge platforms (14) above the bearing platform (1), enabling the extension inserting plates (141) on the two bridge platforms (14) to be inserted into the inserting grooves (131) together, and covering the cover plate (21) in the abdicating notch (143);
s2, cement mortar is injected into the grouting pipe (22), the cement mortar flows into the sliding pipe (151) and then flows into the grout blocking pipe (142), and finally flows into the grout outlet pipe (23) through the second fixing hole (135), grouting is stopped when the cement grout is filled to the upper pipe orifice of the grout outlet pipe (23), and after the cement mortar is solidified and formed, the extension inserting plate (141) is stably inserted into the inserting groove (131), so that connection of adjacent bridge abutments (14) is achieved.
CN202110772931.3A 2021-07-08 2021-07-08 Structure of bridge abutment and roadbed joint and construction method Active CN113605217B (en)

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