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A construction method for the end wall of a subway station in a sandy pebble stratum

A technology for subway stations and construction methods, which is applied to earth-moving drilling, underground chambers, and shaft equipment, etc., can solve the problems of station end wall enclosures and waterproofing membrane damage, affecting the safety of shield construction, etc., to ensure waterproofing. performance and safety

Active Publication Date: 2021-09-28
ROAD & BRIDGE INT +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the inner side of the end wall is equipped with a waterproof layer, and the construction of the pipe shed requires drilling holes in the end wall, the conventional construction method of the end wall and the pipe shed will cause damage to the enclosure structure and waterproof membrane of the end wall of the station. Affect the construction safety when the shield machine is received

Method used

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  • A construction method for the end wall of a subway station in a sandy pebble stratum
  • A construction method for the end wall of a subway station in a sandy pebble stratum
  • A construction method for the end wall of a subway station in a sandy pebble stratum

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Embodiment Construction

[0022] In order to ensure that the construction of the pipe shed does not destroy the airtightness of the waterproof coiled material, the present invention divides the end wall into an inner layer and an outer layer, and the waterproof coiled material is arranged between the inner and outer layers. The outer layer is divided into a pre-casting belt and a post-casting belt, which is convenient for pipe shed construction and waterproof membrane lapping.

[0023] Construction process such as figure 1 As shown, pour the inner layer of the end wall first, lay the waterproof membrane on the inner layer of the end wall, then pour the outer layer and pour the belt first, leave the construction position of the pipe shed, carry out the construction of the pipe shed, overlap the dense waterproof membrane, and finally pour the end wall Outer post-cast tape. The specific construction steps are as follows:

[0024] (1) if figure 2 , image 3 As shown, the inner layer 1 of the end wall ...

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Abstract

The invention relates to a construction method for the end wall of a subway station in a sand and pebble stratum. The end wall is divided into two layers, the inner and outer layers, and poured in three steps. First, the inner layer of the end wall is poured to provide a stable working surface for the construction of shed pipes, and then the end wall is poured. The outer layer is poured first to reinforce the inner layer of the end wall, then the pipe shed is constructed on the inner layer of the end wall, and then the tight waterproof membrane is lapped, and finally the outer layer of the end wall is poured outside the construction area of ​​the shed pipe. Ensure the waterproof performance of the end wall waterproof membrane, so as to ensure the safety of the foundation pit.

Description

technical field [0001] The invention relates to the technical field of subway underground station construction, in particular to a construction method for an end wall of a subway station in a sandy pebble stratum. Background technique [0002] There are generally two shield wells (foundation pits) at the end of a subway station, one of which is a shield receiving well. When the station is located in a sandy pebble stratum and is close to an existing line, construction needs to be done on the end wall of the station before receiving the shield. The pipe shed reinforces the ground to ensure the safety of shield tunneling and the stability of the ground. Since the inner side of the end wall is equipped with a waterproof layer, and the construction of the pipe shed requires drilling holes in the end wall, the conventional construction method of the end wall and the pipe shed will cause damage to the enclosure structure and waterproof membrane of the end wall of the station. Aff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/00E21D11/10E21D11/38E21D9/14
CPCE21D9/14E21D11/003E21D11/10E21D11/383
Inventor 龚杰吴曼
Owner ROAD & BRIDGE INT
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