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Underground diaphragm wall construction method adopting fore shaft pipe joints

A technique for underground diaphragm walls and construction methods, which can be applied to artificial islands, water conservancy projects, underwater structures, etc., and can solve problems such as low construction quality of underground diaphragm walls, poor wall integrity, and hidden construction hazards, etc. Achieve the effect of improving construction quality and reliability, reducing hidden dangers such as leakage, and reliable construction

Active Publication Date: 2014-01-22
SHANGHAI ERSHIYE CONSTR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing construction methods have the above problems to varying degrees, thus leaving construction hidden dangers, the construction quality of the underground diaphragm wall is not high, the integrity of the wall is not good, and the verticality is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] A method for constructing an underground diaphragm wall using lock pipe joints. Before, during, and after the concrete pouring of the underground diaphragm wall, the following steps are carried out sequentially:

[0011] Step 1: before pouring the concrete of the underground diaphragm wall, hoist the locking pipe fixing device above the locking pipe, and use the locking pipe fixing device to hug the locking pipe.

[0012] Step 2: When pouring the concrete of the underground diaphragm wall, pour concrete into the wall section of the diaphragm wall in the slot, insert the lock pipe, and start the lock after 2 hours to 4 hours after the concrete of the diaphragm wall begins to be poured The pipe fixing device makes the locking pipe reciprocatingly twist around its central axis. When reciprocatingly torsion, it first rotates π radians at ω angular speed, and then turns π radians at ω angular speed to complete a reciprocating twist. ω is not less than rad / sec, the frequency...

Embodiment 2

[0016] A method for constructing an underground diaphragm wall using lock pipe joints. Before, during, and after the concrete pouring of the underground diaphragm wall, the following steps are carried out sequentially:

[0017] Step 1: before pouring the concrete of the underground diaphragm wall, hoist the locking pipe fixing device above the locking pipe, and use the locking pipe fixing device to hug the locking pipe.

[0018] Step 2: When pouring the concrete of the underground diaphragm wall, pour concrete into the wall section of the diaphragm wall in the slot, insert the lock pipe, and start the lock after 2 hours to 4 hours after the concrete of the diaphragm wall begins to be poured Tube fixing device, so that the locking tube rotates around its own central axis. When rotating, it continuously rotates clockwise or counterclockwise at an angular speed of ω. Every rotation of 2π radians is a rotation, and ω is not less than rad / sec, the frequency of rotation is not less...

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PUM

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Abstract

The invention relates to the field of construction methods of protection walls made of concrete on site or fixed building foundations similar to walls made of concrete, in particular to an underground diaphragm wall construction method adopting fore shaft pipe joints. The underground diaphragm wall construction method adopting the fore shaft pipe joints comprises the step of underground diaphragm wall construction concrete pouring. The method is characterized in that before the step of underground diaphragm wall construction concrete pouring, in the underground diaphragm wall construction concrete pouring process and after the step of underground diaphragm wall construction concrete pouring, the method further comprises the following steps that (1) a fore shaft pipe fixing device is used for holding fore shaft pipes, (2) the fore shaft pipes are made to turn around in a reciprocating mode or rotate around the central axes of the fore shaft pipes, and (3) the fore shaft pipes are pulled out in one time. The method is simple in operation, high in construction quality and good in pulling effect.

Description

technical field [0001] The invention relates to the field of a construction method for a fixed building foundation using a retaining wall made of concrete on site or a similar wall, in particular to an underground continuous wall construction method using a locking pipe joint. Background technique [0002] With the acceleration of urbanization, there are more and more development and construction projects for underground space such as urban high-rise building foundation engineering, subway tunnel engineering, and underground plaza engineering, and the application of underground diaphragm wall construction is becoming more and more extensive. In the construction process of the underground diaphragm wall, the locking pipe is the most widely used joint form, which limits the fluid concrete in a certain space, and finally forms the required wall surface. After pouring the concrete in the trough section, at this stage, the drawing machine is mainly used to pull the locking pipe i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/16
Inventor 贾国强陈强王强杨成华
Owner SHANGHAI ERSHIYE CONSTR CO LTD