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Construction method for dismounting concrete support of fabricated subway station

A technology for subway stations and construction methods, which is applied in the fields of earthwork drilling, artificial islands, underground chambers, etc., can solve the problems of low safety, low efficiency, long construction period, etc., and achieve the effect of simple process and high efficiency

Inactive Publication Date: 2020-11-13
KUNMING RAILWAY CONSTR COMPANY OF CHINA RAILWAY NO 8 ENG GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing demolition methods are time-consuming, laborious and inefficient, leading to long construction periods and low safety. This problem has always had a great impact on the construction of subway stations and has not been effectively resolved

Method used

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  • Construction method for dismounting concrete support of fabricated subway station
  • Construction method for dismounting concrete support of fabricated subway station
  • Construction method for dismounting concrete support of fabricated subway station

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Embodiment

[0044] This embodiment is applied to a prefabricated subway station. In this embodiment, the foundation pit and roadway are sequentially composed of a 42m long cast-in-place section, a 148m long assembly section and a 28m long cast-in-place section. The geology of the foundation pit and roadway is mainly plain fill, silty clay, cohesive soil gravel sand, strongly weathered tuff, moderately weathered tuff and slightly weathered tuff, and the foundation pit and roadway are mainly located in silty clay and cohesive soil gravel In sand, the base is located in strong and medium weathered tuff, and the anti-floating water level elevation is 12m.

[0045] The cross-sectional size of the concrete support to be removed is 1000mm×800mm, the length is 22m, and the weight of the concrete support is about 44t. The concrete support is removed in the foundation pit and roadway from the construction to the assembly stage.

[0046] Specifically, this embodiment discloses a construction method f...

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Abstract

The invention relates to the technical field of pile support system fabricated station construction, in particular to a construction method for dismounting a concrete support of a fabricated subway station. The method comprises the following steps that a plurality of fixing bottom plate blocks are hoisted in sequence, and the bottom plate blocks are tensioned and locked in the depth direction; base grouting, fertilizer tank backfilling and inverted arch backfilling are carried out; grouping is carried out according to a plurality of steel supports corresponding to the lower portion of a firstconcrete support, and the concrete supports and the steel supports are divided into a plurality of groups in the depth direction; and side wall blocks, middle plate blocks and top plate blocks are sequentially assembled in the groups in the depth advancing direction, temporary supports are additionally arranged in the construction advancing direction, and the steel supports and the concrete supports in the groups are dismounted. By means of the construction method, dismounting of the concrete supports is synchronously achieved in the foundation pit and roadway propelling construction process,the original concrete supports and the original steel supports can be dismounted step by step when the bottom plate blocks, the side wall blocks, the top plate blocks and the like are assembled, a dismounting process is simple in technology, the efficiency is higher, and the safety and reliability are achieved.

Description

technical field [0001] The invention relates to the technical field of pile support system station construction, in particular to a construction method for demolishing concrete supports of a prefabricated subway station. Background technique [0002] During the construction of the prefabricated subway station, the pre-support of the foundation pit and the roadway is completed through the excavation of the foundation pit and the roadway, followed by the hoisting of the bottom plate, base grouting, backfilling of the fertilizer tank, side wall assembly, middle plate assembly and roof plate For assembly and other construction, it is also necessary to remove the pre-support and set up long-term support. [0003] Pre-support usually includes many concrete supports and steel structure supports, and the concrete supports are set on the top (first row) of the foundation pit or roadway, and the steel structure supports are set on the middle (second row) and bottom (third row) of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/045E21D11/04E21D11/14
CPCE02D29/045E02D29/04E21D11/04E21D11/14E02D2220/00E02D2300/0029E02D2300/002
Inventor 刘晖胡云飞朱伯东魏焰黄鹏王光伟刘远建高子明李雷张宝王超张永平徐文猛刘薇薛连李敏
Owner KUNMING RAILWAY CONSTR COMPANY OF CHINA RAILWAY NO 8 ENG GRP
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