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Method for constructing end wall of subway station in sandy gravel stratum

A technology for subway stations and construction methods, which is applied in underground chambers, earth-moving drilling, wellbore lining, etc., can solve problems affecting shield construction safety, damage to station end wall enclosures and waterproofing membranes, etc., to ensure waterproofing. performance and safety

Active Publication Date: 2020-07-24
ROAD & BRIDGE INT +1
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  • Summary
  • 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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  • Method for constructing end wall of subway station in sandy gravel stratum
  • Method for constructing end wall of subway station in sandy gravel stratum
  • Method for constructing end wall of subway station in sandy gravel 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 layer, the present invention divides the end wall into an inner layer and an outer layer, and the waterproof coiled layer 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 coiled material 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 coil layer, and finally pour the outer wall Post-pouring tape. The specific construction steps are as follows:

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

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Abstract

The invention relates to a method for constructing an end wall of a subway station in a sandy gravel stratum. The method comprises the following steps of dividing the end wall into an inner layer andan outer layer, performing casting three times, firstly casting the inner layer of the end wall, providing a stable working surface for shed pipe construction, then casting the outer layer of the endwall, reinforcing the inner layer of the end wall by a pre-casting strip, constructing a pipe shed on the inner layer of the end wall, performing lap jointing of tight waterproof coiled materials, andfinally pouring a post-cast strip of the outer layer of the end wall outside a shed pipe construction area. The waterproof performance of the end wall waterproof coiled material can be guaranteed, and therefore the safety of a foundation pit is guaranteed.

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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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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