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Construction method for reinforcing foundation pit of overpass rail transit

A construction method and rail transit technology, applied in infrastructure engineering, excavation, artificial islands, etc., can solve problems such as low construction efficiency, high cost, and large material consumption, and achieve the effect of reducing construction costs and increasing construction speed

Pending Publication Date: 2022-07-15
THE FIFTH ENG CO LTD OF CHINA RAILWAY NO 10 ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] If all MJS piles are used for the reinforcement construction of the foundation pit of the upper-span rail transit, the material consumption will be large, the construction efficiency will be low, and the cost will be high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The specific embodiments of the present invention will be further described in detail below with reference to the examples. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

[0030] The concrete construction steps of the present invention are as follows: after determining the construction parameters of the three-axis stirring pile and the MJS construction method pile through experiments, start the foundation pit reinforcement construction, and construct the foundation pit reinforcement for the upper-span rail transit first. Three-axis stirring pile, after the three-axis stirring pile reaches a certain strength, then construct the MJS construction method pile;

[0031] The three-axis stirring pile construction method includes:

[0032] A1. Setting of limit device: stake out the outline of the subway, set up bamboo piles every 3.0m, and set up eye-catching warning signs. The pile is mechanicall...

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PUM

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Abstract

The invention relates to the technical field of upper-span rail transit foundation pit reinforcement construction, in particular to an upper-span rail transit foundation pit reinforcement construction method, which adopts a mode of combining MJS construction method piles and three-shaft mixing piles to greatly improve the construction speed and control the deformation of an existing subway tunnel within an allowable range. After construction parameters of the three-axis stirring piles and the MJS construction method piles are determined through experiments, foundation pit reinforcement construction is started, the three-axis stirring piles are constructed firstly for foundation pit reinforcement of the overpass rail transit, and then the MJS construction method piles are constructed after the three-axis stirring piles reach certain strength.

Description

technical field [0001] The invention relates to the technical field of foundation pit reinforcement construction for upper-span rail transit, in particular to a construction method for foundation pit reinforcement for upper-span rail transit. Background technique [0002] If all MJS construction method piles are used in the reinforcement construction of the upper-span rail transit foundation pit, the material consumption will be large, the construction efficiency will be low, the cost will be high, it will not meet the regulations on environmental protection and energy conservation and emission reduction, and the practicability will be poor. SUMMARY OF THE INVENTION [0003] In order to solve the above-mentioned technical problems, the present invention provides a method of combining MJS construction method piles and three-axis stirring piles, which can greatly improve the construction speed, and at the same time control the deformation of the existing subway tunnels within...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04E02D17/02E02D5/46E02D5/38E02D15/04E02D33/00E02D29/045E02D29/00
CPCE02D17/04E02D17/02E02D5/46E02D5/38E02D15/04E02D33/00E02D29/045E02D29/04
Inventor 程方成周国赵帅裴孙思新王中升
Owner THE FIFTH ENG CO LTD OF CHINA RAILWAY NO 10 ENG GRP