CN112796195A - Long-connection multi-span double-layer intercity railway cross box girder bridge and construction method thereof - Google Patents
Long-connection multi-span double-layer intercity railway cross box girder bridge and construction method thereof Download PDFInfo
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- CN112796195A CN112796195A CN202011511847.8A CN202011511847A CN112796195A CN 112796195 A CN112796195 A CN 112796195A CN 202011511847 A CN202011511847 A CN 202011511847A CN 112796195 A CN112796195 A CN 112796195A
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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
- E01D1/00—Bridges in general
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C1/00—Design or layout of roads, e.g. for noise abatement, for gas absorption
- E01C1/002—Design or lay-out of roads, e.g. street systems, cross-sections ; Design for noise abatement, e.g. sunken road
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
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Abstract
The invention relates to a long-connection multi-span double-layer intercity railway cross box girder bridge and a construction method thereof, wherein the cross box girder bridge consists of bridge piers, and an upper-layer cross box girder and a lower-layer cross box girder which are arranged on the bridge piers from top to bottom; the upper-layer cross box girder consists of an upper-layer cross beam and an upper-layer box girder embedded in the upper-layer cross beam; the lower-layer cross box girder consists of a lower-layer cross beam and a lower-layer box girder embedded in the lower-layer cross beam; the upper cross beam is arranged above the lower cross beam and is parallel to the lower cross beam. After the construction of the pier is finished, a full-hall bracket construction method is adopted to pour the lower cross box girder in three sections, and then the lower box girder is taken as a foundation to pour the upper box girder in three sections. The invention shares the pier foundation to form three-dimensional traffic, and fully utilizes land resources; the building height of the bridge is reduced, and materials are saved; the lower cross beam is fixedly connected with the bridge pier, so that the transverse connection and the stability of the structure are enhanced; the construction is carried out by adopting a layering and segmenting method, so that the using amount of the bracket can be saved, and the construction method has a good economic effect.
Description
Technical Field
The invention belongs to the technical field of bridge and rail transit, and particularly relates to a long-connection multi-span double-layer intercity railway cross box girder bridge and a construction method thereof.
Background
With the development of society and economy, urbanization has become an important trend in the development of the world today. In the course of urbanization, cities of different scales and different development stages have different traffic demands, which need to be satisfied by corresponding traffic technical levels and transportation means. From the practice of the development of a plurality of international metropolies, the rail transit becomes an indispensable component in an urban traffic structure by the technical advantages of large traffic volume and high speed, better solves the problem of increasing supply and demand contradiction of large and medium urban traffic, and meets the requirement of urbanization.
The existing urban rail transit is usually provided with a special line, occupies more land and is not reasonable in utilization of space resources. Therefore, the long-acting method and the fundamental way for solving traffic jam are realized by scientific and reasonable layout, innovative design and construction of the three-dimensional traffic track and improvement of traffic capacity.
Intercity railway construction often faces the difficult problems of land shortage, construction inconvenience, limited space and the like. How to design a novel bridge structure to maximize the effective utilization rate of space and facilitate construction is a difficult problem.
Disclosure of Invention
Aiming at the technical problems in the existing double-layer intercity railway traffic, the invention provides a long-connection multi-span double-layer intercity railway cross box girder bridge and a construction method thereof, wherein the double-layer cross box girder shares a pier foundation, so that the occupied area of the foundation is reduced, and the problems of land shortage and space limitation are effectively solved; during construction, the pier is firstly poured and the cross box girder is respectively poured, so that the construction method has good technical and economic effects.
In order to achieve the purpose, the invention adopts the technical scheme that:
a long-connection multi-span double-layer intercity railway cross box girder bridge has the advantages that the total length of the bridge is 200-250 m, and the single span of the double-layer cross box girder is 30-50 m; the long-connection multi-span double-layer intercity railway cross box girder bridge consists of a pier, an upper-layer cross box girder and a lower-layer cross box girder, wherein the upper-layer cross box girder and the lower-layer cross box girder are arranged on the pier from top to bottom; the upper-layer cross box girder and the lower-layer cross box girder are parallel to each other; the upper-layer cross box girder consists of an upper-layer cross beam and an upper-layer box girder embedded in the upper-layer cross beam; the lower-layer cross box girder consists of a lower-layer cross beam and a lower-layer box girder embedded in the lower-layer cross beam; the upper-layer cross beam is arranged above the lower-layer cross beam, and the upper-layer cross beam is parallel to the lower-layer cross beam and forms a passage.
Furthermore, the upper-layer cross beam and the lower-layer cross beam are both in a door shape, and the upper-layer cross beam is fixedly connected with the top of the bridge pier through a support; and the lower cross beam is fixedly connected with the bridge pier.
Further, the long-connection multi-span double-layer intercity railway cross box girder bridge also comprises embedded steel bars arranged in the middle of the bridge piers; and the lower cross beam is fixedly connected with the bridge pier through the embedded steel bars.
A construction method of a cross box girder bridge of a long-connection multi-span double-layer intercity railway comprises the following steps:
1) completing the construction of a pier, pre-casting a lower cross beam section of 1m at the position of the lower cross beam, and reserving reinforcing steel bars;
2) the construction of a lower-layer cross beam and a lower-layer box beam thereof is completed by adopting a segmented full-hall support method and building a support on the ground;
dividing a lower-layer box girder into an A section, a B section and a C section, wherein the length of the B section is 70-85 m and is positioned in the middle, and two ends of the B section are positioned near a zero bending moment; the length of the section A is equal to that of the section C, and the section A and the section C are positioned on two sides; treating the foundation around the pier, setting up a B-section full support, and prepressing;
installing a section B template, binding a section B steel bar, installing a section B corrugated pipe and prestress, pouring section B concrete, maintaining and tensioning the section B prestress;
dismantling the bracket and the template at the section B;
fourthly, erecting full supports of the section A and the section C, and prepressing;
fifthly, installing templates of the A section and the C section, binding reinforcing steel bars of the A section and the C section, installing corrugated pipes of the A section and the C section and prestressing force, installing full-length prestressing force of the A section, the B section and the C section, pouring concrete of the A section and the C section, curing and tensioning the prestressing force of the A section and the C section and the full-length prestressing force of the A section, the B section and the C section.
3) And (3) erecting a support on the lower layer main beam by adopting a segmented full support method, and finishing the construction of the upper layer cross beam and the upper layer box beam by referring to the step 2).
Compared with the prior art, the invention has the beneficial effects that:
1. by utilizing the method, the long-connection multi-span double-layer intercity railway cross box girder bridge shares a pier foundation, so that the occupied area of the foundation is reduced; at the joint of the gate pier and the bridge box girder, the box girder is integrally embedded into the gate crossbeam, so that the consumption of steel bars and concrete is saved, and the vertical space occupied by the bridge is reduced;
2. by utilizing the method, the lower-layer cross beam is fixedly connected with the bridge pier, so that the transverse relation of the bridge pier is increased, the stability of the bridge pier is better, and the structure is safer;
3. by utilizing the method, the long-connection multi-span double-layer intercity railway cross box girder bridge is constructed according to the sequence of firstly pouring the bridge piers, pouring the lower-layer cross box girder by segmenting the full-hall supports, then using the lower-layer main girder as the foundation, building the full-hall supports and segmentally pouring the upper-layer cross box girder, so that the support height and the support consumption of the upper-layer main girder are effectively reduced, the upper-layer supports and the lower-layer supports are repeatedly used, and the method has good technical and economic effects.
Drawings
FIG. 1 is a schematic cross-sectional view of a double-layer cross beam of a long-connection multi-span double-layer intercity railway cross box girder bridge of the invention;
FIG. 2 is a schematic diagram of the construction method of the cross box girder bridge of the long-span multi-span double-deck intercity railway of the invention;
in the figure:
1-bridge pier; 2, embedding reinforcing steel bars; 3, a support; 4, an upper-layer cross beam; 5, an upper-layer box girder; 6-lower cross beam; 7-lower box girder.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1, the long-span multi-span double-deck intercity railway cross box girder bridge provided by the embodiment comprises piers, and an upper-deck cross box girder and a lower-deck cross box girder which are arranged on the piers from top to bottom; the upper-layer cross box girder and the lower-layer cross box girder are parallel; the upper-layer cross box girder consists of an upper-layer cross beam 4 and an upper-layer box girder 5 embedded in the upper-layer cross beam; the lower-layer cross box girder consists of a lower-layer cross beam 6 and a lower-layer box girder 7 embedded in the lower-layer cross beam; the upper cross beam 4 is arranged above the lower cross beam 6, and the upper cross beam 4 is parallel to the lower cross beam 6. And the distance between the upper-layer cross beam 4 and the lower-layer cross beam 6 is a reserved passage.
According to the long-connection multi-span double-layer intercity railway cross box girder bridge provided by the embodiment, the total length of the bridge is 200-250 m, and the single span of the double-layer cross box girder is 30-50 m;
the structure of the upper-layer cross beam 4 and the lower-layer cross beam 6 provided by the embodiment is in a door shape, and the upper-layer cross beam 4 is fixedly connected with the top of the pier 1 through the support 3; and the lower cross beam 6 is fixedly connected with the pier 1.
Specifically, the cross-section structure of the upper cross beam 4 is door-shaped, and the upper box beam 5 is arranged in the inner groove; the cross-section structure of the lower cross beam 6 is door-shaped, and the lower box beam 6 is arranged in the inner groove.
The long-connection multi-span double-layer intercity railway cross box girder bridge further comprises embedded steel bars 2 arranged in the middle of the bridge piers 1; the lower cross beam 6 is fixedly connected with the pier 1 through the embedded steel bars 2.
In this embodiment, a construction method of a long-link multi-span double-deck intercity railway cross box girder is described by taking a 246m (30.9+6 × 30.7+30.9) long-link multi-span double-deck intercity railway cross box girder as an example.
Referring to fig. 2, in this embodiment, the construction method of the long-span multi-span double-deck intercity railway cross box girder bridge includes the following steps:
1) completing the construction of the pier 1, pre-casting a lower cross beam section of 1m at the position of the lower cross beam 5 and reserving a steel bar 2; (see FIG. 2 (1))
2) A segmented full-hall support method is adopted, a support is erected on the ground, and the construction of the lower-layer cross beam 5 and the lower-layer box girder thereof is completed, and the method comprises the following specific steps; (see FIG. 2 (2))
Dividing a lower-layer box girder into an A section, a B section and a C section, wherein the length of the B section is 70-85 m and is positioned in the middle, and two ends of the B section are positioned near a zero bending moment; the length of the section A is equal to that of the section C, and the section A and the section C are positioned on two sides; treating the foundation around the pier (1), setting up a B-section full support, and pre-pressing; (as shown in FIG. 2(2) — (r))
Installing a section B template, binding a section B steel bar, installing a section B corrugated pipe and prestress, pouring section B concrete, maintaining and tensioning the section B prestress; (as shown in (2) -2 of FIG. 2.)
Dismantling the bracket and the template at the section B; (as shown in (2) - ③ of figure 2)
Fourthly, erecting full supports of the section A and the section C, and prepressing; (as shown in (2) - ((2) of FIG. 2))
Fifthly, installing templates of the A section and the C section, binding reinforcing steel bars of the A section and the C section, installing corrugated pipes of the A section and the C section and prestressing force, installing full-length prestressing force of the A section, the B section and the C section, pouring concrete of the A section and the C section, curing and tensioning the prestressing force of the A section and the C section and the full-length prestressing force of the A section, the B section and the C section. (as shown by (2) -v in FIG. 2)
3) And (3) erecting a support on the lower layer main beam by adopting a segmented full support method, and finishing the construction of the upper layer cross beam (4) and the upper layer box beam by referring to the step 2). (see FIGS. 2(3), (3) - ((3) - (+).
In the embodiment, the length of the section B is 70-85 m; the length of the A section is equal to that of the C section.
In conclusion, the invention provides a long-connection multi-span double-layer intercity railway cross box girder bridge and a construction method thereof, the long-connection multi-span double-layer intercity railway cross box girder bridge shares a pier foundation, and the occupied area of the foundation is reduced; at the joint of the gate pier and the bridge box girder, the box girder is integrally embedded into the gate crossbeam, so that the consumption of steel bars and concrete is saved, and the vertical space occupied by the bridge is reduced; the lower cross beam is fixedly connected with the bridge pier, so that the transverse relation of the bridge pier is increased, the stability of the bridge pier is better, and the structure is safer; according to the long-connection multi-span double-layer intercity railway cross box girder bridge, the bridge piers are poured firstly, the lower-layer cross box girder is poured by the segmented full-space support, the lower-layer main girder is recycled as the foundation, the full-space support is set up, the upper-layer cross box girder is poured in the segmented mode, the support height and the support using amount of the upper-layer main girder are effectively reduced, the upper-layer support and the lower-layer support are made to be used repeatedly, and the long-connection multi-span double-layer intercity.
Claims (4)
1. A long-connection multi-span double-layer intercity railway cross box girder bridge has the advantages that the total length of the bridge is 200-250 m, and the single span of the double-layer cross box girder is 30-50 m; the method is characterized in that: the long-connection multi-span double-layer intercity railway cross box girder bridge consists of a pier, an upper-layer cross box girder and a lower-layer cross box girder, wherein the upper-layer cross box girder and the lower-layer cross box girder are arranged on the pier from top to bottom; the upper-layer cross box girder and the lower-layer cross box girder are parallel to each other; the upper-layer cross box girder consists of an upper-layer cross beam (4) and an upper-layer box girder (5) embedded in the upper-layer cross beam; the lower-layer cross box girder consists of a lower-layer cross beam (6) and a lower-layer box girder (7) embedded in the lower-layer cross beam; the upper-layer cross beam (4) is arranged above the lower-layer cross beam (6), and the upper-layer cross beam (4) is parallel to the lower-layer cross beam (6) and forms a passage channel.
2. The long-span multi-span double-deck intercity railway cross box girder bridge of claim 1, wherein: the upper-layer cross beam (4) and the lower-layer cross beam (6) are of a door shape, and the upper-layer cross beam (4) is fixedly connected with the top of the pier (1) through the support (3); and the lower cross beam (6) is fixedly connected with the pier (1).
3. The long-span multi-span double-deck intercity railway cross box girder bridge of claim 2, wherein: the long-connection multi-span double-layer intercity railway cross box girder bridge also comprises embedded steel bars (2) arranged in the middle of the bridge piers (1); and the lower-layer cross beam (6) is fixedly connected with the pier (1) through the embedded steel bars (2).
4. The construction method of the long-span multi-span double-deck intercity railway cross box girder bridge based on any one of claims 1 to 3, characterized by comprising the following steps:
1) finishing the construction of the pier (1), pre-casting a lower cross beam section of 1m at the position of the lower cross beam (6) and reserving a steel bar (2);
2) the construction of a lower-layer cross beam (6) and a lower-layer box beam thereof is completed by erecting a support on the ground by adopting a segmented full-hall support method;
dividing a lower-layer box girder into an A section, a B section and a C section, wherein the length of the B section is 70-85 m and is positioned in the middle, and two ends of the B section are positioned near a zero bending moment; the length of the section A is equal to that of the section C, and the section A and the section C are positioned on two sides; treating the foundation around the pier (1), setting up a B-section full support, and pre-pressing;
installing a section B template, binding a section B steel bar, installing a section B corrugated pipe and prestress, pouring section B concrete, maintaining and tensioning the section B prestress;
dismantling the bracket and the template at the section B;
fourthly, erecting full supports of the section A and the section C, and prepressing;
installing templates of the A section and the C section, binding reinforcing steel bars of the A section and the C section, installing corrugated pipes of the A section and the C section and prestressing force, installing full-length prestressing force of the A section, the B section and the C section, pouring concrete of the A section and the C section, curing and tensioning the prestressing force of the A section and the C section and the full-length prestressing force of the A section, the B section and the C section;
3) and (3) erecting a support on the lower layer main beam by adopting a segmented full support method, and finishing the construction of the upper layer cross beam (4) and the upper layer box beam by referring to the step 2).
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| CN202011511847.8A CN112796195A (en) | 2020-12-18 | 2020-12-18 | Long-connection multi-span double-layer intercity railway cross box girder bridge and construction method thereof |
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| CN202011511847.8A CN112796195A (en) | 2020-12-18 | 2020-12-18 | Long-connection multi-span double-layer intercity railway cross box girder bridge and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117005305A (en) * | 2023-07-05 | 2023-11-07 | 中国铁建港航局集团有限公司 | Construction method for constructing upper capping beam in prestressed concrete common pier section |
| CN117051700A (en) * | 2023-07-05 | 2023-11-14 | 中国铁建港航局集团有限公司 | Construction method of prestress system of pier stud reserved post-pouring capping beam |
-
2020
- 2020-12-18 CN CN202011511847.8A patent/CN112796195A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117005305A (en) * | 2023-07-05 | 2023-11-07 | 中国铁建港航局集团有限公司 | Construction method for constructing upper capping beam in prestressed concrete common pier section |
| CN117051700A (en) * | 2023-07-05 | 2023-11-14 | 中国铁建港航局集团有限公司 | Construction method of prestress system of pier stud reserved post-pouring capping beam |
| CN117051700B (en) * | 2023-07-05 | 2024-06-11 | 中国铁建港航局集团有限公司 | Construction method of prestress system of pier stud reserved post-pouring capping beam |
| CN117005305B (en) * | 2023-07-05 | 2024-06-18 | 中国铁建港航局集团有限公司 | Construction method for constructing upper capping beam in prestressed concrete common pier section |
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