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Construction method of river-crossing open-excavation deep foundation pit

A construction method and technology for deep foundation pits, which are applied in excavation, infrastructure engineering, construction, etc., can solve the problems of complicated underground pipelines, difficult construction methods, and heavy road traffic, and achieve fast construction speed, good effect, and support. stable effect

Inactive Publication Date: 2019-07-23
CHINA RAILWAY 23RD CONSTR BUREAU LTD +1
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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 overcome the problems in the prior art that the construction of existing subways is mostly located in urban areas, the road traffic is heavy, and the underground pipelines are intricate. Insufficient, providing a method of open-cut deep foundation pit construction across the river

Method used

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Embodiment

[0033] A kind of river-crossing open-cut deep foundation pit construction method of the present invention comprises the following steps:

[0034] A. Divide the construction area of ​​the foundation pit to be constructed into two parts: the first-phase foundation pit and the second-phase foundation pit, of which the first-phase foundation pit is a river-crossing open-cut foundation pit, and the second-phase foundation pit is a non-river-crossing open-cut foundation pit , set up cofferdams to intercept the river upstream and downstream of the first-stage foundation pit, and set up a diversion channel to divert the river. The diversion channel partly passes through the second-stage foundation pit. After the diversion is completed, the existing For the river course, the broken muck shall be cleaned and backfilled with soil;

[0035] The cofferdam adopts a steel mold cofferdam, laying 20mm thick bamboo plywood on the water-facing surface and attaching an anti-seepage membrane cloth...

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PUM

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Abstract

The invention discloses a construction method of a river-crossing open-excavation deep foundation pit. By adopting the construction method of the river-crossing open-excavation deep foundation pit, construction of city underground space foundation pit of open-excavation river-crossing can be rapidly completed, enclosing piles, anti-pull piles, concrete support, steel support and shotcrete nets between piles are adopted to form effective support for the foundation pit, the stability of a foundation pit structure is ensured, the construction method of the open-excavation deep foundation pit crossing the river is constructed front and back with intervals, multilayer progressive circulating construction of each interval is carried out, the construction speed is high, the support is stable, theconstruction method of the open-excavation deep foundation pit crossing the river is suitable for subway line open-excavation river-crossing construction with larger construction area and high environmental sensitivity, and the effect is good.

Description

technical field [0001] The invention relates to the field of engineering construction, in particular to an open-cut deep foundation pit construction method for crossing a river. Background technique [0002] The subway is convenient for people to travel. With the increasing size and modernization of the city, more and more subway lines are planned and constructed. Most of the construction of the subway is located in the urban area, with heavy road traffic and intricate underground pipelines, especially some subway lines. It is necessary to pass through the river, and the construction method of open cut is very difficult. Contents of the invention [0003] The purpose of the present invention is to overcome the problems in the prior art that the construction of existing subways is mostly located in urban areas, the road traffic is heavy, and the underground pipelines are intricate. Insufficient, provide a kind of open-cut deep foundation pit construction method that crosse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02E02D17/04E02D19/02E02D19/04
CPCE02D17/02E02D17/04E02D19/02E02D19/04E02D2300/002E02D2300/0029
Inventor 杨建明肖红武肖毅王峰徐振龙李小军赵瑞亮杨西富何继华巩森许彪邓涛王后高方业飞武俊杰翟勇奚成
Owner CHINA RAILWAY 23RD CONSTR BUREAU LTD
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