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A π-shaped underground diaphragm wall shield tunnel construction method

A technique for underground diaphragm walls and construction methods, which can be applied to foundation structure engineering, sheet pile walls, buildings, etc., and can solve problems such as mud gushing, sand gushing, and surface settlement

Inactive Publication Date: 2016-03-30
HAINAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a Π-shaped underground diaphragm wall shield tunnel construction method in order to solve the problems of mud gushing, sand gushing and surface settlement that are very likely to occur in the existing shield tunneling construction method

Method used

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  • A π-shaped underground diaphragm wall shield tunnel construction method

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Embodiment Construction

[0063] What the present invention provides is a kind of Π-shaped underground diaphragm wall shield access hole construction method, and its specific method is as follows:

[0064] The first step is to formulate the construction process. The specific construction process is as follows:

[0065] Measurement and setting out → guide wall making → mud preparation and adjustment → ground wall formation and bottom cleaning replacement → GFRP reinforcement cage and bamboo reinforcement cage production and hanging → underwater concrete pouring → joint construction → joint pipe jacking → The entire construction is completed;

[0066] The second step, the specific construction process is as follows:

[0067] 1. Measurement and setting out:

[0068] According to the design drawings, the control piles for the axis of the ground connection wall are measured. The control piles are protected piles, and the elevation is introduced into the site. The closed backtest method is used to set the ...

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Abstract

The invention discloses a shield tunneling construction method for an n-shaped underground diaphragm wall. The shield tunneling construction method comprises the following steps of step I, formulating a construction process flow; step II, performing the specific construction process: firstly, measuring and setting out; secondly, manufacturing a guide wall; thirdly, preparing and adjusting slurry; fourthly, trenching the underground diaphragm wall and performing bottom-clearing replacement; fifthly, manufacturing and hanging a GFRP (Glass Fiber Reinforced Plastic) reinforcement cage; sixthly, manufacturing and setting a bamboo reinforcement cage; seventhly, grouting underwater concrete; eighthly, constructing joints; ninthly, topping a joint pipe. The shield tunneling construction method disclosed by the invention has the beneficial effects that a tunnel door is not needed to be manually chiseled, so the construction period is greatly shortened; a soil body on the outer side of an envelope structure is not needed to be reinforced, so the construction cost of engineering is reduced; the envelope structure directly plays roles of retaining soil and stopping water at the shield tunneling stage, and the safety of the shield tunneling is greatly guaranteed.

Description

technical field [0001] The invention relates to a construction method of a shield tunnel entry and exit, in particular to a construction method for a shield tunnel entry and exit of a Π-shaped underground diaphragm wall. Background technique [0002] At present, the access and exit holes of shield tunneling are the key link in the construction of shield tunneling, which has great engineering construction risks. When the shield enters and exits the tunnel, the general construction method is to complete the main structure of the shield tunnel first, then improve and strengthen the soil at the end of the shield tunnel, and then chisel out the reinforced concrete enclosure at the entrance to complete the shield tunnel. departure or arrival. Among them, the time required for demolition of the cave door is very tight, and the construction is difficult. After the portal is demolished, the strength and sealing of the reinforced body are very high. If the reinforcement effect is no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/18
CPCE02D5/18
Inventor 胡俊李艳荣肖天崟杜娟胡伟佳琳
Owner HAINAN UNIV
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