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CN112796195A - Changlian multi-span double-deck intercity railway cross box girder bridge and its construction method - Google Patents

Changlian multi-span double-deck intercity railway cross box girder bridge and its construction method Download PDF

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Publication number
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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box girder
cross beam
bridge
layer
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Inventor
袁江
罗杨
迟荣景
钱远虎
李凤松
朱学峰
汪建群
李隆
贾文博
李平平
申村
李雷洋
冯俊超
马中秋
姚佳龙
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Hunan University of Science and Technology
Shanghai Civil Engineering Co Ltd of CREC
Third Engineering Co Ltd of Shanghai Civil Engineering Co Ltd of CREC
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Hunan University of Science and Technology
Shanghai Civil Engineering Co Ltd of CREC
Third Engineering Co Ltd of Shanghai Civil Engineering Co Ltd of CREC
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Priority to CN202011511847.8A priority Critical patent/CN112796195A/en
Publication of CN112796195A publication Critical patent/CN112796195A/en
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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
    • 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
    • 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
    • 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
    • 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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  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

本发明涉及一种长联多跨双层城际铁路十字箱梁桥及其施工方法，十字箱梁桥由桥墩以及从上自下设置在桥墩上的上层十字箱梁和下层十字箱梁组成；上层十字箱梁由上层十字横梁和镶嵌于上层十字横梁内的上层箱梁组成；下层十字箱梁由下层十字横梁和镶嵌于下层十字横梁内的下层箱梁组成；上层十字横梁置于下层十字横梁上方且相平行。桥墩施工完，采用满堂支架施工法分三段浇筑下层十字箱梁，再以下层箱梁作为基础分三段浇筑上层箱梁。本发明共用桥墩基础形成立体交通，充分利用土地资源；降低了桥梁建筑高度，节省了材料；下层十字横梁与桥墩固结，增强了结构的横向联系和稳定性；采用分层和分段的方法施工，可节省支架用量，具有良好经济效果。

Figure 202011511847

The invention relates to a cross box girder bridge of a long-connected multi-span double-layer intercity railway and a construction method thereof. The cross box girder bridge is composed of a bridge pier, an upper cross box girder and a lower cross box girder arranged on the bridge pier from top to bottom; The upper cross box girder is composed of the upper cross beam and the upper box girder embedded in the upper cross beam; the lower cross box girder is composed of the lower cross beam and the lower box girder embedded in the lower cross beam; the upper cross beam is placed in the lower cross beam above and parallel. After the bridge pier construction is completed, the lower cross box girder is poured in three sections by the full-house support construction method, and the upper box girder is poured in three sections as the foundation. The invention shares the bridge pier foundation to form three-dimensional traffic, makes full use of land resources; reduces the height of the bridge building and saves materials; the lower cross beams and the bridge piers are consolidated to enhance the lateral connection and stability of the structure; the layered and segmented method is adopted. Construction can save the amount of brackets and has good economic effects.

Figure 202011511847

Description

Long-connection multi-span double-layer intercity railway cross box girder bridge and construction method thereof
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)

1.一种长联多跨双层城际铁路十字箱梁桥，桥梁全长为200～250m，所述双层十字箱梁的单跨为30～50m；其特征在于：所述长联多跨双层城际铁路十字箱梁桥由桥墩以及从上自下设置在桥墩上的上层十字箱梁和下层十字箱梁组成；所述上层十字箱梁和下层十字箱梁向平行；所述上层十字箱梁由上层十字横梁(4)和镶嵌于上层十字横梁内的上层箱梁(5)组成；所述下层十字箱梁由下层十字横梁(6)和镶嵌于下层十字横梁内的下层箱梁(7)组成；所述上层十字横梁(4)置于下层十字横梁(6)上方，且上层十字横梁(4)与下层十字横梁(6)相平行且形成通行孔道。1. A long-connected multi-span double-layer intercity railway cross box girder bridge, the total length of the bridge is 200～250m, and the single span of the double-layer cross box girder is 30～50m; it is characterized in that: the long-connected multi-span The cross box girder bridge across a double-deck intercity railway is composed of piers and upper cross box girder and lower cross box girder arranged on the pier from top to bottom; the upper cross box girder and the lower cross box girder are parallel; The cross box girder consists of an upper cross beam (4) and an upper box girder (5) embedded in the upper cross beam; the lower cross box girder consists of a lower cross beam (6) and a lower box girder embedded in the lower cross beam (7) Composition: the upper cross beam (4) is placed above the lower cross beam (6), and the upper cross beam (4) and the lower cross beam (6) are parallel and form passages. 2.根据权利要求1所述的长联多跨双层城际铁路十字箱梁桥，其特征在于：所述上层十字横梁(4)和下层十字横梁(6)的结构均为门型，所述上层十字横梁(4)通过支座(3)与桥墩(1)顶部固结；所述下层十字横梁(6)与桥墩(1)固结。2. The Changlian multi-span double-layer intercity railway cross box girder bridge according to claim 1, characterized in that: the structures of the upper cross beam (4) and the lower cross beam (6) are all door-shaped, so The upper cross beam (4) is consolidated with the top of the bridge pier (1) through the support (3); the lower cross beam (6) is consolidated with the bridge pier (1). 3.根据权利要求2所述的长联多跨双层城际铁路十字箱梁桥，其特征在于：所述长联多跨双层城际铁路十字箱梁桥还包括设置在桥墩(1)中部的预埋钢筋(2)；所述下层十字横梁(6)通过与预埋钢筋(2)与桥墩(1)固结。3. The cross box girder bridge of Changlian multi-span double-deck intercity railway according to claim 2, characterized in that: said Changlian multi-span double-deck intercity railway cross box girder bridge also comprises a cross box girder bridge arranged on a pier (1) The embedded steel bar (2) in the middle; the lower cross beam (6) is consolidated with the bridge pier (1) through the embedded steel bar (2). 4.一种基于权利要求1-3项任一所述的长联多跨双层城际铁路十字箱梁桥的施工方法，其特征在于，所述施工方法包括以下步骤：4. a construction method based on any one of claims 1-3, wherein the construction method comprises the following steps: 1)完成桥墩(1)施工，在下层十字横梁(6)的位置处预浇1m的下层十字横梁节段并预留钢筋(2)；1) After completing the construction of the bridge pier (1), pre-cast a 1m lower cross beam segment at the position of the lower cross beam (6) and reserve steel bars (2); 2)采用分段的满堂支架法，在地面上搭设支架，完成下层十字横梁(6)及其下层箱梁的施工，具体步骤为；2) adopt the segmented full house support method, set up supports on the ground to complete the construction of the lower cross beam (6) and the lower box beam, and the concrete steps are as follows; ①将下层箱梁分为A段、B段和C段，B段的长度为70～85m，位于中间，B段的两端头应位于零弯矩附近；所述A段的长度与C段长度相等，位于两侧；对桥墩(1)周围的地基进行处理，在搭设B段满堂支架，并预压；① The lower box girder is divided into A section, B section and C section. The length of section B is 70-85m, located in the middle, and the two ends of section B should be located near the zero bending moment; the length of section A is the same as section C. The lengths are equal and are located on both sides; the foundation around the bridge pier (1) is treated, and the B-section full-house supports are erected and preloaded; ②安装B段模板，绑扎B段钢筋，安装B段波纹管和预应力，浇筑B段混凝土，养生并张拉B段预应力；②Install B-section formwork, tie B-section steel bars, install B-section bellows and prestress, pour B-section concrete, maintain and stretch B-section prestress; ③拆除B段支架和模板；③Remove the bracket and formwork of B section; ④搭设A段和C段满堂支架，并预压；④Establish and pre-press the full-house brackets of Section A and Section C; ⑤安装A段和C段模板，绑扎A段和C段钢筋，安装A段及C段波纹管和预应力，同时安装A段、B段及C段通长预应力，浇筑A段和C段混凝土，养生并张拉A段及C段预应力和A段、B段及C段通长预应力；⑤Install the formwork of Section A and Section C, bind the steel bars of Section A and Section C, install the corrugated pipes and prestressing of Section A and Section C, and install the prestressing of Section A, Section B and Section C at the same time, and pour Section A and Section C Concrete, curing and tensioning section A and section C prestress and section A, section B and section C through-length prestress; 3)采用分段的满堂支架法，在下层主梁上搭设支架，参考步骤2)完成上层十字横梁(4)及其上层箱梁的施工。3) Using the segmented full house support method, set up supports on the lower main beam, refer to step 2) to complete the construction of the upper cross beam (4) and the upper box beam.
CN202011511847.8A 2020-12-18 2020-12-18 Changlian multi-span double-deck intercity railway cross box girder bridge and its construction method Pending CN112796195A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
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

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CN207452677U (en) * 2017-05-15 2018-06-05 中国铁路设计集团有限公司 A kind of railway and track traffic double-layer frame pier
CN216379095U (en) * 2020-12-18 2022-04-26 中铁上海工程局集团有限公司 Cross box girder bridge of long-connection multi-span double-layer intercity railway

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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
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