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Construction method of half-block sealing wall in transfer section of subway station

A technology for subway stations and construction methods, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve problems affecting the safety of foundation pits, difficulty in brushing walls, etc., to reduce excavation risks, improve joint quality, reduce Effect of Exposure Time

Active Publication Date: 2019-07-19
THE SECOND CONSTR OF CTCE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] According to the applicant's understanding: Although the first construction method can reduce the amount of concrete, there are construction difficulties such as difficulty in forming grooves and painting walls, which may cause soil to be trapped between the two walls, resulting in serious leakage. The integrity of the wall (blocking wall) also has a great influence; although the second construction method is easy to form grooves and brush walls, it wastes concrete and it is difficult to chisel out excess walls during the excavation of the foundation pit, resulting in the exposure of the foundation pit. A long time will affect the safety of the foundation pit

Method used

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  • Construction method of half-block sealing wall in transfer section of subway station
  • Construction method of half-block sealing wall in transfer section of subway station
  • Construction method of half-block sealing wall in transfer section of subway station

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Embodiment

[0033] A kind of construction method of the semi-cut type sealing wall of the subway station transfer section of the present embodiment, such as figure 2 shown, including the following steps:

[0034] 1) Make guide wall;

[0035] 2) Use the groove forming machine to form groove 1;

[0036] 3) Construction of the ground and wall of the first opening:

[0037] Install the lock pipe 3 to the set position first, then hoist the reinforcement cage 2 into the groove 1;

[0038] Reinforcement cage 2 comprises the sealing wall reinforcement cage 21 of the lower part and the upper hanging bar system 22 welded on the sealing wall reinforcement cage 21 during on-site construction. The rib system 22 is provided with a PVC pipe 24 that communicates with two opposite sides of the reinforcement cage 2, and the PVC pipe 24 is a PVC pipe that is horizontally arranged and blocked with foam at both ends; the inner diameter of the PVC pipe 24 of the present embodiment is 2cm, PVC The tubes 24...

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Abstract

The invention relates to a construction method for a metro station transfer section half type blocking wall and belongs to the technical field of underground engineering construction. The construction method for the metro station transfer section half type blocking wall comprises the following steps that (1) a guide wall is made; (2) a groove is formed through a grooving machine; (3) a first-open width diaphragm wall is constructed; (4) a closing width diaphragm wall is constructed; and (5) unnecessary wall bodies of the blocking wall are chiseled away fast. Through the construction method for the metro station transfer section half type blocking wall, the problems of grooving and wall brushing of the half type blocking wall are effectively solved, and the unnecessary wall bodies are chiseled away fast.

Description

technical field [0001] The invention relates to a construction method for a half-section sealing wall in a transfer section of a subway station, and belongs to the technical field of underground engineering construction. Background technique [0002] The transfer station of the "ten"-shaped crossing line of the subway generally has a three-story underground structure and is constructed at the same time as the two-story underground station. For example, figure 1 shown. Since the transfer section and the second-floor station are excavated at the same time, a half-block sealing wall needs to be installed at the junction of the transfer section and the second-floor station to resist the lateral pressure of the soil under the second-floor station floor. [0003] The half-cut sealing wall is a ground connection wall whose top elevation is slightly higher than that of the foundation pit bottom of the negative second floor. For the construction of this type of ground connection wal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/18
CPCE02D5/187
Inventor 吴亚磊雷明孙小猛胡晓东徐登云郑永胜何俊张维
Owner THE SECOND CONSTR OF CTCE GROUP
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