CN106677073B - Adapt to the semi-monolithic formula seamless bridge construction method of soft soil foundation - Google Patents
Adapt to the semi-monolithic formula seamless bridge construction method of soft soil foundation Download PDFInfo
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- CN106677073B CN106677073B CN201710077762.5A CN201710077762A CN106677073B CN 106677073 B CN106677073 B CN 106677073B CN 201710077762 A CN201710077762 A CN 201710077762A CN 106677073 B CN106677073 B CN 106677073B
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- situ segment
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention discloses a kind of semi-monolithic formula seamless bridge construction method for adapting to soft soil foundation, step are as follows：First, erecting beam, and permanent bearing and temporary cushion block are set below precast beam；Temporary cushion block is arranged on prefabricated beam end, for supporting precast beam；Then, the reinforcing bar in colligation beam-ends Cast-in-Situ Segment, the built-in fitting of pre-buried tension and compression combined member in beam-ends Cast-in-Situ Segment, in the end of precast beam, beam-ends Cast-in-Situ Segment is poured, beam-ends Cast-in-Situ Segment is located above permanent bearing；Finally, road surface is poured；On tension and compression combined member built-in fitting, the tension top plate of PBL shearing resistance device perforated panels, perforation reinforcing bar, stiffener, reinforcing bar of mating formation, and casting concrete screed-coat, asphalt concrete pavement have been welded in installation.Present invention greatly enhances installation accuracy, can synchronously reach tension and compression combination predictive role, can adjust the installation of strut and tie according to erected on site situation and pour angle, it is ensured that pull bar is distinguished closely connected with back, depression bar and beam-ends.
Description
Technical field
The present invention relates to technical field of bridge construction, more particularly to a kind of semi-monolithic formula seamless bridge for adapting to soft soil foundation
Construction method.
Background technology
In the prior art, (partly) retractor device of the integral bridge due to eliminating Abutment, by bridge both ends
Expansion joint moves to attachment strap end, and the temperature deformation of girder is transferred to attachment strap and road joining place by attachment strap, stretched so as to become bridge
Contracting seam is road seam, simplifies seam construction, improves the performance of bridge, reduce maintenance costs.
For the semi-monolithic formula seamless bridge in soft soil foundation region, when for accelerating construction progress, using the prefabricated beam body of freely-supported
During the continuous construction method of rotation structure, a kind of semi-monolithic formula seamless bridge construction of precast assembly for adapting to soft soil foundation can be used
(i.e. by girder, attachment strap structure separate, and between girder, between girder and attachment strap set tension and compression combined member, that is, be arranged on master
The continuous composite bridges face of beam and attachment strap top surface forms pull bar, and side girder upper limb end set is trapezoidal to convex to form depression bar, realizes
The deformation of adjacent girder beam body indulged caused by the bridge floor continuous structure bridge to stretcher strain, buckle and stabilize and increase its anticorrosive property
Can), with overcome traditional semi-monolithic formula seamless bridge because structure is continuous and caused by additional internal force is big, material usage is high, construction is multiple
The problems such as miscellaneous.
It is but same with girder in factory according to conventional method for prefabricated beam section, the pre-buried rod member of the tension and compression combined member
Prefabricated completion is walked, then problems be present：
(1) construction quality is not easy to ensure：
After live main beam supporting installation, because the factors such as road vertical and horizontal gradient, bridge oblique angles and construction error influence,
The mutual top surface of precast main beam, attachment strap is hardly formed a plane, and it is not close to be easily caused pull bar installation difficulty, depression bar and beam-ends
Patch, it can not synchronously reach the predictive role of tension and compression combination.
(2) concrete cracking is easily caused when steel plate welds：
Using conventional method Site Welding when on pre-embedded steel slab, high temperature caused by welding is easily caused pre-buried steel for pull bar installation
The concrete cracking on plate periphery.
(3) structure tension performance and poor durability：
1st, installation accuracy is low, easily produces additional internal force in the structure, reduces the stress performance of structure；It can cause when serious
The structure is destroyed, and influences the normal use during operation.
2nd, structure easily seeps water, and reduces the durability of structure.
The content of the invention
In view of the drawbacks described above of prior art, the present invention provides a kind of semi-monolithic formula seamless bridge for adapting to soft soil foundation
Construction method, the first purpose of realization is the Cast-in-Situ Segment by reserving certain length in the end of precast beam, by strut and tie
Construction install pour completion at the scene, pull bar is fixed on girder using high-strength bolt.
To achieve the above object, a kind of semi-monolithic formula seamless bridge construction method for adapting to soft soil foundation, step is such as
Under：
A, erecting beam, and permanent bearing and temporary cushion block are set below the precast beam；The temporary cushion block is set
Put in the prefabricated beam end, for supporting the precast beam；
B, in the end of the precast beam, beam-ends Cast-in-Situ Segment is poured, the beam-ends Cast-in-Situ Segment is on the permanent bearing
Side, when pouring, tension and compression combined member built-in fitting is set in the beam-ends Cast-in-Situ Segment；
C, road surface is poured；After PBL shearing resistance device perforated panels are welded on tension top plate, then the tension mounting of roof plate arrived
Above the tension and compression combined member built-in fitting；Perforation reinforcing bar, PBL shearing resistance device perforated panels are penetrated in the PBL shearing resistances device perforated panel
Main room set reinforcing bar of mating formation；Then casting concrete screed-coat, asphalt concrete pavement.
Preferably, the permanent bearing and the temporary cushion block are arranged on bridge pier, and the bridge pier upper end connects two respectively
Precast beam described in root；Tension and compression combined member built-in fitting is set to comprise the following steps described in step B：
B-1-1, the beam-ends Cast-in-Situ Segment is poured, and before pouring, in the beam-ends Cast-in-Situ Segment of two precast beams respectively
Shallow-layer embedded board, deep layer embedded board, pre-embedded bolt, the reinforcing bar of the trapezoidal raised depression bar of colligation beam-ends are set；After the completion of, described in dismounting
Temporary cushion block, enable precast beam described in the permanent seat supports；
B-1-2, neoprene plate is laid between two shallow-layer embedded boards, set on the neoprene plate anti-
Top plate is drawn, and the tension top plate is anchored on the pre-embedded bolt and the shallow-layer embedded board with nut, completes tension and compression combination
The installation of component.
Preferably, the permanent bearing and the temporary cushion block are arranged on abutment, and the abutment upper end connects institute respectively
State precast beam and attachment strap；Tension and compression combined member built-in fitting is set to comprise the following steps described in step B：
B-2-1, the position for corresponding in abutment upper end attachment strap set the thick elastic support band to be used to support the attachment strap；
B-2-2, the beam-ends Cast-in-Situ Segment and attachment strap are poured, set respectively in the beam-ends Cast-in-Situ Segment and the attachment strap shallow
Layer embedded board, deep layer embedded board, pre-embedded bolt, the reinforcing bar of the trapezoidal raised depression bar of colligation beam-ends；After the completion of, remove the interim pad
Block, enable beam-ends Cast-in-Situ Segment described in the permanent seat supports；
B-2-3, neoprene plate is laid between the shallow-layer embedded board, tension top is set on the neoprene plate
Plate, and the tension top plate is anchored on the pre-embedded bolt and the shallow-layer embedded board with nut, complete tension and compression combined member
Installation.
Preferably, the PBL shearing resistances device perforated panel and the tension top plate are integrally welded.
Preferably, the reinforcing bar of mating formation is longitudinally, laterally arranged in a crossed manner in latticed.
Beneficial effects of the present invention：
1st, installation accuracy is drastically increased, can synchronously reach tension and compression combination predictive role：
Method due to using in-site installation built-in fitting and pouring, the peace of strut and tie according to erected on site situation, can be adjusted
Fill and pour angle, it is ensured that pull bar is distinguished closely connected with back, depression bar and beam-ends.
2nd, the stress performance and good endurance of structure：
(1) installation accuracy is high, reduces structure additional internal force.
(2) pull bar is fixed on girder using high-strength bolt, is avoided concrete and is ftractureed because of welding.
Design, concrete structure and the caused technique effect of the present invention are described further below with reference to accompanying drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
Brief description of the drawings
Fig. 1 is illustrated that the schematic diagram for setting temporary support in one embodiment of the invention on bridge pier.
Fig. 2 is illustrated that two preset beams in one embodiment of the invention start setting up the signal of the built-in fitting of tension and compression combined member
Figure.
Fig. 3 is illustrated that in one embodiment of the invention that two preset beams are completed to set the schematic diagram of tension and compression combined member.
Fig. 4 is illustrated that in one embodiment of the invention that two preset beams are completed to lay showing for road surface after setting tension and compression combined member
It is intended to.
Fig. 5 is illustrated that the schematic diagram for setting temporary support in one embodiment of the invention on abutment.
Fig. 6, which is illustrated that in one embodiment of the invention, starts setting up the pre-buried of tension and compression combined member between preset beam and attachment strap
The schematic diagram of part.
Fig. 7, which is illustrated that, completes the signal for setting tension and compression combined member between preset beam and attachment strap in one embodiment of the invention
Figure.
Fig. 8, which is illustrated that in one embodiment of the invention between preset beam and attachment strap, to be completed to lay after setting tension and compression combined member
The schematic diagram on road surface.
Embodiment
Embodiment
As shown in Figures 1 to 8, a kind of semi-monolithic formula seamless bridge construction method for adapting to soft soil foundation, step is such as
Under：
A, erecting beam 2, and permanent bearing 11 and temporary cushion block 12 are set below precast beam 2；Temporary cushion block 12 is set
Put in the end of precast beam 2, for supporting precast beam 2；
B, in the end of precast beam 2, beam-ends Cast-in-Situ Segment 22 is poured, beam-ends Cast-in-Situ Segment 22 is located at the permanent top of bearing 11,
When pouring, tension and compression combined member built-in fitting is set in beam-ends Cast-in-Situ Segment 22；
C, road surface 3 is poured；After PBL shearing resistance devices perforated panel 28 is welded on tension top plate 27, then tension top plate 27 pacified
It is attached to above tension and compression combined member built-in fitting；Perforation reinforcing bar 21, PBL shearing resistance device perforated panels are penetrated in PBL shearing resistance devices perforated panel 28
28 main room set reinforcing bar 32 of mating formation；Then casting concrete screed-coat 33, asphalt concrete pavement 34.
As shown in Figures 1 to 4, permanent bearing 11 and temporary cushion block 12 are arranged on bridge pier 1, and the upper end of bridge pier 1 connects respectively
Two precast beams 2；Tension and compression combined member built-in fitting is set to comprise the following steps in step B：
As shown in Fig. 2 B-1-1, pour beam-ends Cast-in-Situ Segment 22, and before pouring, in the beam-ends Cast-in-Situ Segment 22 of two precast beams 2
Shallow-layer embedded board 23, deep layer embedded board 24, pre-embedded bolt 25, the reinforcing bar of the trapezoidal raised depression bar of colligation beam-ends are inside set respectively；It is complete
Cheng Hou, temporary cushion block 12 is removed, enable permanent bearing 11 and support precast beam 2；
As shown in figure 3, B-1-2, the laying neoprene plate 26 between two shallow-layer embedded boards 23, in neoprene plate 26
Upper setting tension top plate 27, and tension top plate 27 is anchored on pre-embedded bolt 25 and shallow-layer embedded board 23 with nut, complete tension and compression
The installation of combined member.
As shown in Fig. 5 to Fig. 8, in certain embodiments, permanent bearing 11 and temporary cushion block 12 are arranged on abutment 4, bridge
The upper end of platform 4 connects precast beam 2 and attachment strap 5 respectively；Tension and compression combined member built-in fitting is set to comprise the following steps in step B：
As shown in figure 5, B-2-1, the position for corresponding in the upper end of abutment 4 attachment strap 5 set thick elastic support band 14 to be used to support
Attachment strap 5；
As shown in fig. 6, B-2-2, pouring beam-ends Cast-in-Situ Segment 22 and attachment strap 5, set respectively in beam-ends Cast-in-Situ Segment 22 and attachment strap 5
Put shallow-layer embedded board 23, deep layer embedded board 24, pre-embedded bolt 25, the reinforcing bar of the trapezoidal raised depression bar of colligation beam-ends；After the completion of, remove
Temporary cushion block 12, enable permanent bearing 11 and support beam-ends Cast-in-Situ Segment 22；
As shown in fig. 7, B-2-3, the laying neoprene plate 26 between shallow-layer embedded board 23, set on neoprene plate 26
Tension top plate 27 is put, and tension top plate 27 is anchored on pre-embedded bolt 25 and shallow-layer embedded board 23 with nut, completes tension and compression combination
The installation of component.
In certain embodiments, PBL shearing resistances device perforated panel 27 is integrally welded with tension top plate 28.
In certain embodiments, reinforcing bar 32 of mating formation is longitudinally, laterally arranged in a crossed manner in latticed.
Preferred embodiment of the invention described in detail above.It should be appreciated that one of ordinary skill in the art without
Creative work can is needed to make many modifications and variations according to the design of the present invention.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (5)
1. a kind of semi-monolithic formula seamless bridge construction method for adapting to soft soil foundation, step are as follows：
A, erecting beam (2), and permanent bearing (11) and temporary cushion block (12) are set below the precast beam (2)；It is described
Temporary cushion block (12) is arranged on the precast beam (2) end, for supporting the precast beam (2)；
B, in the end of the precast beam (2), beam-ends Cast-in-Situ Segment (22) is poured, the beam-ends Cast-in-Situ Segment (22) is positioned at described permanent
Above bearing (11), when pouring, tension and compression combined member built-in fitting is set in the beam-ends Cast-in-Situ Segment (22)；
C, road surface (3) is poured；After PBL shearing resistance device perforated panels (28) are welded on tension top plate (27), then by the tension top
Plate (27) is installed to above the tension and compression combined member built-in fitting；Perforation reinforcing bar is penetrated in the PBL shearing resistances device perforated panel (28)
(21), PBL shearing resistances device perforated panel (28) main room set reinforcing bar (32) of mating formation；Then casting concrete screed-coat (33), pitch mix
Coagulate native surface layer (34).
2. a kind of semi-monolithic formula seamless bridge construction method for adapting to soft soil foundation according to claim 1, it is special
Sign is that the permanent bearing (11) and the temporary cushion block (12) are arranged on bridge pier (1), bridge pier (1) the upper end difference
Connect two precast beams (2)；Tension and compression combined member built-in fitting is set to comprise the following steps described in step B：
B-1-1, the beam-ends Cast-in-Situ Segment (22) is poured, and before pouring, in the beam-ends Cast-in-Situ Segment (22) of two precast beams (2)
Shallow-layer embedded board (23), deep layer embedded board (24), pre-embedded bolt (25), the steel of the trapezoidal raised depression bar of colligation beam-ends are inside set respectively
Muscle；After the completion of, the temporary cushion block (12) is removed, the permanent bearing (11) is enabled and supports the precast beam (2)；
B-1-2, neoprene plate (26) is laid between two shallow-layer embedded boards (23), in the neoprene plate (26)
Upper setting tension top plate (27), and the tension top plate (27) is anchored on the pre-embedded bolt (25) and the shallow-layer with nut
Embedded board (23), complete the installation of tension and compression combined member.
3. a kind of semi-monolithic formula seamless bridge construction method for adapting to soft soil foundation according to claim 1, it is special
Sign is that the permanent bearing (11) and the temporary cushion block (12) are arranged on abutment (4), abutment (4) the upper end difference
Connect the precast beam (2) and attachment strap (5)；Tension and compression combined member built-in fitting is set to comprise the following steps described in step B：
B-2-1, the position for corresponding in abutment (4) upper end attachment strap (5) set thick elastic support band (14) to be used to support the attachment strap
(5)；
B-2-2, the beam-ends Cast-in-Situ Segment (22) and attachment strap (5) are poured, in the beam-ends Cast-in-Situ Segment (22) and the attachment strap (5)
Shallow-layer embedded board (23), deep layer embedded board (24), pre-embedded bolt (25), the steel of the trapezoidal raised depression bar of colligation beam-ends are set respectively
Muscle；After the completion of, the temporary cushion block (12) is removed, the permanent bearing (11) is enabled and supports the beam-ends Cast-in-Situ Segment (22)；
B-2-3, neoprene plate (26) is laid between the shallow-layer embedded board (23), set on the neoprene plate (26)
Tension top plate (27) is put, and the tension top plate (27) is anchored on the pre-embedded bolt (25) with nut and the shallow-layer is pre-buried
Plate (23), complete the installation of tension and compression combined member.
4. a kind of semi-monolithic formula seamless bridge construction method of adaptation soft soil foundation according to Claims 2 or 3, its
It is characterised by, the PBL shearing resistances device perforated panel (28) and the tension top plate (27) are integrally welded.
5. a kind of semi-monolithic formula seamless bridge construction method of adaptation soft soil foundation according to Claims 2 or 3, its
It is characterised by, the reinforcing bar of mating formation (32) is longitudinally, laterally arranged in a crossed manner in latticed.
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| CN201710077762.5A CN106677073B (en) | 2017-02-14 | 2017-02-14 | Adapt to the semi-monolithic formula seamless bridge construction method of soft soil foundation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710077762.5A CN106677073B (en) | 2017-02-14 | 2017-02-14 | Adapt to the semi-monolithic formula seamless bridge construction method of soft soil foundation |
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| CN106677073A CN106677073A (en) | 2017-05-17 |
| CN106677073B true CN106677073B (en) | 2018-03-06 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108330745B (en) * | 2018-02-09 | 2020-06-09 | 上海市城市建设设计研究总院（集团）有限公司 | Implementation method of tramcar assembled under-rail foundation in soft soil area |
| CN115404762A (en) * | 2022-10-10 | 2022-11-29 | 上海市政工程设计研究总院（集团）有限公司 | Pier top longitudinal continuous structure of assembled beam bridge and construction method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09296459A (en) * | 1996-04-30 | 1997-11-18 | Masumi Yamada | Steel encased reinforced concrete |
| CN101736749B (en) * | 2008-11-06 | 2011-08-10 | 上海市城市建设设计研究院 | Method for constructing soft soil foundation continuous caisson |
| CN101538851A (en) * | 2009-04-13 | 2009-09-23 | 上海市城市建设设计研究院 | Construction technology for reinforcing soft soil foundation by transverse pressurization and dedicated aeration zone press-in device |
| CN102433872B (en) * | 2011-09-26 | 2014-05-14 | 上海市城市建设设计研究总院 | Large-diameter concrete prefabricated segment pile of soft soil foundation |
| CN203373772U (en) * | 2013-08-01 | 2014-01-01 | 上海市城市建设设计研究总院 | Foundation structure of reinforced concrete drainage pipeline under condition of soft soil foundation |
| CN204491388U (en) * | 2015-01-28 | 2015-07-22 | 福州大学 | A kind of outsourcing semi-integral bridge abutment bridge construction |
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