CN215593643U - Non-wet joint span-by-span assembled prestressed concrete continuous beam bridge - Google Patents
Non-wet joint span-by-span assembled prestressed concrete continuous beam bridge Download PDFInfo
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- CN215593643U CN215593643U CN202121477021.4U CN202121477021U CN215593643U CN 215593643 U CN215593643 U CN 215593643U CN 202121477021 U CN202121477021 U CN 202121477021U CN 215593643 U CN215593643 U CN 215593643U
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Abstract
The utility model discloses a non-wet joint span-by-span assembled prestressed concrete continuous beam bridge, which comprises a main beam and piers for erecting the main beam, wherein the main beam is a multi-span prestressed concrete continuous beam, the main beam is connected with the piers through a support, the main beam is divided into a plurality of main beam prefabricated sections along the longitudinal bridge direction, adjacent main beam prefabricated sections are connected with the assembled joints through the assembled joints, the assembled joints comprise general assembled joints and relay assembled joints, the relay assembled joints are arranged near the bending moment zero point of the main beam of each span close to the initial pier, the general assembled joints and the relay assembled joints are epoxy resin glue joints, and the main beam does not have any wet joints and cast-in-situ closed sections. The prefabricated sections of the main beam are prefabricated in a factory and integrally assembled on site, so that the construction quality and the construction efficiency are ensured. The utility model has no wet joint and cast-in-place closure section, and improves the operation degree of standardization, industrialization, mechanization and informatization.
Description
Technical Field
The utility model belongs to the field of bridge structure buildings, and particularly relates to a wet-joint-free span-by-span spliced prestressed concrete continuous beam bridge and a construction method.
Background
The segment prefabricated glue spliced beam is formed by splicing prefabricated segments into a whole by utilizing the pre-pressure of pre-stressed steel strands, the whole contact surface between the segments is coated with epoxy resin glue for sealing, the process is born in France in the last 60 th century, and the process is widely applied to bridge engineering in the world including the fields of roads, municipal works, railways, rail traffic and the like in China at present.
At present, the prefabricated glued continuous beam is provided with wet joints or cast-in-place closure sections so as to adjust construction errors, but also reduce the degree of standardization, factorization and mechanization operation, and is not beneficial to the improvement of construction efficiency and construction quality.
Disclosure of Invention
The utility model is provided for solving the problems in the prior art, and aims to provide a non-wet joint span-by-span assembled prestressed concrete continuous beam bridge and a construction method.
The technical scheme of the utility model is as follows: the utility model provides a no wet seam is striden and is assembled prestressed concrete continuous beam bridge gradually, includes girder and the pier of erectting the girder, the girder is multispan prestressed concrete continuous beam, the girder passes through the support with the pier and is connected, the girder is divided into a plurality of girder prefabricated segment along the longitudinal bridge to, and adjacent girder prefabricated segment links to each other through assembling the seam.
Further, the assembly joints include general assembly joints and relay assembly joints.
Furthermore, the relay assembling joints are arranged near the bending moment zero point of the main beam of each span close to the initial pier.
Furthermore, the general assembly joints and the relay assembly joints are epoxy resin glue joints, and the main beam is free of any wet joints and cast-in-place closure sections.
Further, the girder prefabricated sections include a general prefabricated section, a pier top prefabricated section, a head-end prefabricated section and a tail-end prefabricated section.
Still further, the pier top prefabricated segment comprises a first pier top prefabricated segment and other pier top prefabricated segments.
Furthermore, the first pier top prefabricated section is an assembled initial section, and construction errors are adjusted through mortar cushion layer thicknesses of supporting cushion stones at other pier top prefabricated sections, the first beam end prefabricated section and the tail beam end prefabricated section and support anchor bolt holes.
Furthermore, a pier beam temporary consolidation structure is arranged at the first pier top prefabricated section, and pier beam temporary consolidation structures are not required to be arranged at other pier top prefabricated sections.
The utility model realizes the precast assembly rate of the beam part of the continuous beam of 100 percent.
The prefabricated sections of the main beam are prefabricated in a factory and integrally assembled on site, so that the construction quality and the construction efficiency are ensured.
The utility model has no wet joint and cast-in-place closure section, and improves the operation degree of standardization, industrialization, mechanization and informatization.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a flow chart of the construction method of the present invention;
FIG. 3 is a schematic diagram of the installation of the first pier top prefabricated segment in the present invention;
FIG. 4 is a schematic view of the first assembly of the present invention;
FIG. 5 is a schematic diagram of the 1 st assembly completion of the present invention;
FIG. 6 is a schematic view of the 2 nd assembly of the present invention;
FIG. 7 is a schematic diagram of the completion of the 2 nd assembly of the present invention;
FIG. 8 is a schematic view of the nth assembly of the present invention;
FIG. 9 is a schematic diagram illustrating the completion of the nth assembly of the present invention;
FIG. 10 is a schematic view of the cross-sectional arrangement and segment hoisting of the legs of the segment assembling bridge fabrication machine of the present invention;
wherein:
1 st bridge pier of 11 bridge piers
12 nd pier, 2 nd pier, 13 rd pier
1n nth pier 1(n +1) nth +1 pier
2 main beam 21 the first main beam span 1
22 the 2 nd span of the girder 2(n-1) the n-1 th span of the girder
Prefabricated segment of nth span 3 main beams of 2n main beams
4 pier top prefabricated segment 41 first pier top prefabricated segment
42 other pier top prefabricated segment 5 initial beam end prefabricated segment
6 end beam end prefabricated segment 7 general assembly joint
8 relay assembling joint 9 support
10 sections of assembling bridge fabrication machines.
Detailed Description
The present invention is described in detail below with reference to the accompanying drawings and examples:
as shown in fig. 1 to 10, the wet-seam-free span-by-span assembled prestressed concrete continuous beam bridge comprises a main beam 2 and a pier 1 for erecting the main beam 2, wherein the main beam 2 is a multi-span prestressed concrete continuous beam, the main beam 2 is connected with the pier 1 through a support 9, the main beam 2 is divided into a plurality of main beam prefabricated sections 3 along a longitudinal bridge direction, and the adjacent main beam prefabricated sections 3 are connected through assembled seams.
The main beam 2 is an n-span (n is more than or equal to 2) prestressed concrete continuous beam, and the number of the piers 1 is n + 1.
The main beam 2 is an equal-height beam.
The main beam 2 is spliced by the segmental assembling bridge fabrication machine 10 by adopting a span-by-span splicing process, and the span-by-span splicing times of the main beam are n times.
The assembly joints comprise general assembly joints 7 and relay assembly joints 8.
The relay assembling joint 8 is arranged near a bending moment zero point of a main beam of each span close to the initial pier.
The general assembly joints 7 and the relay assembly joints 8 are epoxy resin glue joints, and the main beam 2 does not have any wet joint or cast-in-place closure section.
The girder prefabricated section 3 comprises a general prefabricated section, a pier top prefabricated section 4, a head girder end prefabricated section 5 and a tail girder end prefabricated section 6.
The pier top prefabricated segment 4 comprises a first pier top prefabricated segment 41 and other pier top prefabricated segments 42.
The first pier top prefabricated section 41 is an assembled initial section, and construction errors are adjusted through mortar cushion layer thicknesses of supporting cushion stones and support anchor bolt holes at other pier top prefabricated sections 42, the first beam end prefabricated section 5 and the tail beam end prefabricated section 6.
The pier beam temporary consolidation structure is arranged at the first pier top prefabricated section 41, and the pier beam temporary consolidation structure is not required to be arranged at the other pier top prefabricated sections 42.
A construction method for assembling a prestressed concrete continuous beam bridge without wet joints step by step comprises the following steps:
A. prefabricated segment for constructing first pier top
Installing the first pier top prefabricated section 41 and the corresponding support 9 thereof, accurately positioning and performing pier beam temporary consolidation operation at the first pier top prefabricated section 41;
B. assembling other girder prefabricated sections of the 1 st span of the girder
Sequentially assembling other main beam prefabricated sections of the 1 st span 21 of the main beam to a head beam end prefabricated section 5 along the assembling direction;
C. continue to assemble
Continuously assembling until the main beam 2 nd span 22 is assembled at the relay assembling joint 8;
D. grouting and tensioning prestress of support
Stopping assembling, grouting 11 pier top supports of the 1 st pier, tensioning the prestress of the main beam assembled for the 1 st time and grouting;
E. is assembled for the second time
Sequentially splicing the joint 8 of the second span 2 to the joint 8 of the third span 3 of the main beam;
F. grouting and tensioning prestress by secondary support
Stopping assembling, grouting 13 pier top supports of a 3 rd pier, tensioning the prestress of the main beam assembled for the 2 nd time, and grouting;
G. repeat construction
Repeating the construction steps until the relay splicing joint 8 of the nth span is constructed;
H. prefabricated segment for construction to end beam
Sequentially splicing the n-th span from the relay splicing joint 8 to the tail beam end prefabricated section 6;
I. finally the support is grouted into a bridge
Grouting the pier top support seat of the (n +1) th pier 1(n +1), tensioning the prestress of the main beam assembled for the nth time and grouting to form a bridge.
Yet another embodiment
The utility model provides a no wet seam is striden and is assembled prestressed concrete continuous beam bridge gradually, includes girder 2 and pier 1 of erectting girder 2, girder 2 is the multispan prestressed concrete continuous beam, girder 2 is connected through support 9 with pier 1, girder 2 is along indulging the bridge to being divided into a plurality of girder prefabricated segment 3, and adjacent girder prefabricated segment 3 links to each other through assembling the seam.
The main beam 2 is an n-span (n is more than or equal to 2) prestressed concrete continuous beam, and the number of the piers 1 is n + 1.
In this embodiment, the main beam 2 is a variable-height beam with a locally heightened middle pivot.
The main beam 2 is spliced by the segmental assembling bridge fabrication machine 10 by adopting a span-by-span splicing process, and the span-by-span splicing times of the main beam are n times.
The assembly joints comprise general assembly joints 7 and relay assembly joints 8.
The relay assembling joint 8 is arranged near a bending moment zero point of a main beam of each span close to the initial pier.
The general assembly joints 7 and the relay assembly joints 8 are epoxy resin glue joints, and the main beam 2 does not have any wet joint or cast-in-place closure section.
The girder prefabricated section 3 comprises a general prefabricated section, a pier top prefabricated section 4, a head girder end prefabricated section 5 and a tail girder end prefabricated section 6.
The pier top prefabricated segment 4 comprises a first pier top prefabricated segment 41 and other pier top prefabricated segments 42.
The first pier top prefabricated section 41 is an assembled initial section, and construction errors are adjusted through mortar cushion layer thicknesses of supporting cushion stones and support anchor bolt holes at other pier top prefabricated sections 42, the first beam end prefabricated section 5 and the tail beam end prefabricated section 6.
The pier beam temporary consolidation structure is arranged at the first pier top prefabricated section 41, and the pier beam temporary consolidation structure is not required to be arranged at the other pier top prefabricated sections 42.
The span-by-span assembled relay assembling joint 8 is arranged near a girder bending moment zero point of the nth span 2n (n is more than or equal to 2) of the girder close to the nth pier 1 n.
The girder prefabricated sections 3 are all prefabricated in the factory.
The prefabricated sections 3 of the main beam realize the permanent splicing of the sections through internal prestress or external prestress or internal and external composite prestress.
The pier 1 is respectively as follows the sequence of assembling: the first pier 11, the second pier 12, the third pier 13, the nth pier 1n, and the (n +1) th pier 1(n + 1).
Correspondingly, the multiple spans are respectively as follows: the first 1 st span 21 of the main beam, the second 2 nd span 22 of the main beam, the nth-1 st span 2(n-1) of the main beam and the nth span 2n of the main beam.
A construction method for assembling a prestressed concrete continuous beam bridge without wet joints step by step comprises the following steps:
A. prefabricated segment for constructing first pier top
Installing the first pier top prefabricated section 41 and the corresponding support 9 thereof, accurately positioning and performing pier beam temporary consolidation operation at the first pier top prefabricated section 41;
B. assembling other girder prefabricated sections of the 1 st span of the girder
Sequentially assembling other main beam prefabricated sections of the 1 st span 21 of the main beam to a head beam end prefabricated section 5 along the assembling direction;
C. continue to assemble
Continuously assembling until the main beam 2 nd span 22 is assembled at the relay assembling joint 8;
D. grouting and tensioning prestress of support
Stopping assembling, grouting 11 pier top supports of the 1 st pier, tensioning the prestress of the main beam assembled for the 1 st time and grouting;
E. is assembled for the second time
Sequentially splicing the joint 8 of the second span 2 to the joint 8 of the third span 3 of the main beam;
F. grouting and tensioning prestress by secondary support
Stopping assembling, grouting 13 pier top supports of a 3 rd pier, tensioning the prestress of the main beam assembled for the 2 nd time, and grouting;
G. repeat construction
Repeating the construction steps until the relay splicing joint 8 of the nth span is constructed;
H. prefabricated segment for construction to end beam
Sequentially splicing the n-th span from the relay splicing joint 8 to the tail beam end prefabricated section 6;
I. finally the support is grouted into a bridge
Grouting the pier top support seat of the (n +1) th pier 1(n +1), tensioning the prestress of the main beam assembled for the nth time and grouting to form a bridge.
Wherein, when the permanent prestressing force is tensioned, the support 9 at the corresponding stage must participate in the whole stress.
The prefabricated sections of the main beam are prefabricated and maintained in a factory to reduce later-stage shrinkage and creep deformation.
The joint surface of the main beam prefabricated section 3 needs to be cleaned, a loose layer on the surface of concrete is removed, and the surface is dried before gluing.
The prestressed pipeline adopts an auxiliary vacuum grouting process, and a rust inhibitor is added into a pipeline grouting material.
In the whole construction and operation process, the general assembly joints 7 and the relay assembly joints 8 can not generate tensile stress.
After the prefabricated sections 3 of the main beam are installed, before the permanent prestress is tensioned, effective measures are taken to ensure that the dead weight of each section is borne by a bridge fabrication machine, and the stress cracking of the rubber joint surface of the non-tensioned permanent prestress is prevented.
Reasonable construction process is adopted for the glue joint construction between the 3 prefabricated sections of the main beam, structural deformation and internal force change are avoided before prestress tensioning, and measures of insolation prevention and rain and snow prevention are adopted.
In the process of assembling the segments, effective measures are taken to avoid the adverse effect of the bridge deck temperature difference of the assembled structure on the subsequent segments to be assembled and enhance the monitoring.
The girder segments are prefabricated in a factory, and the construction quality is guaranteed.
The prefabricated sections of the main beam are prefabricated in a factory and integrally assembled on site, so that the construction quality and the construction efficiency are ensured.
The utility model has no wet joint and cast-in-place closure section, and improves the operation degree of standardization, industrialization, mechanization and informatization.
Claims (8)
1. The utility model provides a no wet joint strides and assembles continuous girder bridge of prestressed concrete, includes girder (2) and pier (1) of erectting girder (2), its characterized in that: the main beam (2) is a multi-span prestressed concrete continuous beam, the main beam (2) is connected with the pier (1) through a support (9), the main beam (2) is divided into a plurality of main beam prefabricated sections (3) along the longitudinal bridge direction, and the adjacent main beam prefabricated sections (3) are connected through assembling seams.
2. The assembly prestressed concrete continuous girder bridge of one span-by-span without wet joint according to claim 1, wherein: the splicing seams comprise general splicing seams (7) and relay splicing seams (8).
3. The assembly prestressed concrete continuous girder bridge of one span-by-span without wet joint according to claim 2, wherein: the relay assembling joint (8) is arranged near a bending moment zero point of a main beam of each span-close initial pier.
4. The assembly prestressed concrete continuous girder bridge of one span-by-span without wet joint according to claim 3, wherein: the general assembly joints (7) and the relay assembly joints (8) are epoxy resin glue joints, and the main beam (2) is free of any wet joint and cast-in-place closure section.
5. The assembly prestressed concrete continuous girder bridge of one span-by-span without wet joint according to claim 4, wherein: the girder prefabricated segment (3) comprises a general prefabricated segment, a pier top prefabricated segment (4), a head girder end prefabricated segment (5) and a tail girder end prefabricated segment (6).
6. The assembly of the prestressed concrete continuous girder bridge, which is free of wet joints, span by span, according to claim 5, wherein: the pier top prefabricated segment (4) comprises a first pier top prefabricated segment (41) and other pier top prefabricated segments (42).
7. The assembly prestressed concrete continuous girder bridge of one span-by-span without wet joint according to claim 6, wherein: the first pier top prefabricated section (41) is an assembled initial section, and construction errors are adjusted through mortar cushion layer thicknesses of supporting cushion stones and support anchor bolt holes at other pier top prefabricated sections (42), the first beam end prefabricated section (5) and the tail beam end prefabricated section (6).
8. The assembly of the prestressed concrete continuous girder bridge, which is free of wet joints, span by span, according to claim 7, wherein: the pier beam temporary consolidation structure is arranged at the first pier top prefabricated section (41), and the pier beam temporary consolidation structure is not required to be arranged at the other pier top prefabricated sections (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121477021.4U CN215593643U (en) | 2021-06-29 | 2021-06-29 | Non-wet joint span-by-span assembled prestressed concrete continuous beam bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121477021.4U CN215593643U (en) | 2021-06-29 | 2021-06-29 | Non-wet joint span-by-span assembled prestressed concrete continuous beam bridge |
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| CN202121477021.4U Active CN215593643U (en) | 2021-06-29 | 2021-06-29 | Non-wet joint span-by-span assembled prestressed concrete continuous beam bridge |
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