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Construction method for prefabricated box culvert above running subway shield interval structure

A technology for subway shield tunneling and construction methods, which is applied in basic structure engineering, underwater structures, artificial islands, etc., can solve the problems of long construction time and low construction efficiency, and can ensure construction quality, reduce friction, and avoid floating. and deformation effects

Active Publication Date: 2017-09-08
SUZHOU ZHONGHENGTONG ROAD & BRIDGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a construction method for porous prefabricated box culvert above the shield section structure of the running subway to solve the problems of long construction time and low construction efficiency in the prior art

Method used

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  • Construction method for prefabricated box culvert above running subway shield interval structure
  • Construction method for prefabricated box culvert above running subway shield interval structure
  • Construction method for prefabricated box culvert above running subway shield interval structure

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Embodiment 1

[0033] Such as Figure 1-4 Shown, a kind of porous prefabricated box culvert construction method above the subway shield section structure is characterized in that: the construction method is specifically as follows:

[0034] (1) Prefabricated box culvert 2: The box culvert 2 includes 5*10 assembled single warehouse boxes 6 with an overall size of 20m*40m. The single warehouse box 6 is formed by casting molds, and the interior is equipped with a steel skeleton , the overall shape is a rectangular parallelepiped structure with two ends open, and the open sides of the two sides have a number of concave cavities 8 and several convex blocks 9 nested with the concave cavities 8 on the sides of the adjacent single warehouse box body 6. The end face is provided with several lifting lugs 10;

[0035] (2) Prefabricated site: In this embodiment, the selected site is above the subway shield section structure, the ground elevation is 2.3m, the top elevation of the track structure 1 is -8...

Embodiment 2

[0042] The only difference between this embodiment and Embodiment 1 is that in step (4), the method of prefabricating the cushion layer can be used, and the steel plate is embedded on the side of each cushion layer, and the staggered seam is arranged for assembly, and the steel plate on the side is welded during assembly. Fixed, this method is very suitable in rainy days, and can also ensure construction efficiency; at the same time, the method of combining prefabricated cushion and cast-in-place cushion can be used to further improve the construction progress and reduce the impact on the track structure below.

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Abstract

The invention discloses a construction method for a prefabricated box culvert above a running subway shield interval structure. The method mainly comprises the steps of box culvert prefabrication, site prefabrication, foundation pit excavation, cushion ply pouring, box culvert splicing, continuous construction, track monitoring and the like. According to the construction method for the prefabricated box culvert above the running subway shield interval structure, the method is conducted in two stages of in-field prefabrication and field assembling, the field assembling stage executes the tau-effect principle of partitioning, layering, blocking and time limiting, excavation is conducted in partitioned and blocked modes, cushion plies are constructed along with excavation, box culverts are hoisted as quick as possible, loading is conducted in time, the influences of the whole operation process on a track structure below are small, and track floating and deformation can be effectively prevented.

Description

technical field [0001] The invention relates to the field of rail transit construction, in particular to a construction method for a porous prefabricated box culvert above a shield section structure of a running subway. Background technique [0002] In recent years, with the rapid development of urban rail transit, the municipal infrastructure along the subway line has also been implemented simultaneously. However, in the construction of urban roads, it is inevitable to carry out structural construction above the track. Due to lack of experience, some units blindly excavate and support foundation pits, resulting in deformation of shield segments and quality accidents, which greatly affect the city's safety. Safe operation and life of citizens. Every year, due to the construction of urban municipal underground structures, there are hundreds of cases of damage to subway shield tunnels, resulting in direct economic losses of up to hundreds of millions of yuan. [0003] At pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/05
Inventor 刘海宁左亮杨荣涛彭戈邵山磊顾家骏童奋虎陆凯靓
Owner SUZHOU ZHONGHENGTONG ROAD & BRIDGE GRP CO LTD
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