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Construction method and structure for deep foundation pit inner support plate type quick support replacement

A construction method and technology of deep foundation pits, applied in foundation structure engineering, excavation, sheet pile walls, etc., can solve the problems of poor construction flexibility, a large amount of manpower, and long cycle, so as to improve construction quality, speed up construction progress, and reduce construction difficulty small effect

Pending Publication Date: 2020-07-03
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Problems solved by technology

In the existing technology, there are problems such as long period, poor construction flexibility, and high risk of secondary pouring leakage in the inner support holes reserved on the outer wall of the basement when carrying out support replacement and removal construction in deep foundation pits.
Moreover, it has a great impact on the construction progress of the upper main structure, requiring a large amount of manpower to replace and remove the supports, and it is difficult to achieve the effect of preventing leakage of the basement outer wall

Method used

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  • Construction method and structure for deep foundation pit inner support plate type quick support replacement

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] A kind of construction method of the support plate type rapid support change in the deep foundation pit of the present invention, such as figure 1 As shown, this method is to complete the support replacement and removal work at the same time as the basement structure construction; the specific construction steps are as follows:

[0022] a. After completing the construction of the vertical enclosure structure shaped steel support pile 1, first excavate the foundation pit 2 to a depth convenient for making the inner support 3, and immediately complete the inner support 3 of the vertical enclosure structure shaped steel support pile 1;

[0023] b. Continue to excavate the foundation pit 2 to the design depth;

[0024] c. Construction of the basement structure 4 is carried out layer by layer at the bottom of the foundation pit 2;

[0025]...

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Abstract

The invention discloses a construction method and structure for deep foundation pit inner support plate type quick support replacement. According to the construction method, when a basement structureis constructed, supporting concrete plates are additionally arranged between a basement outer wall and vertical enclosing structure steel supporting piles, and inner supports are replaced by the supporting concrete plates to prevent a deep foundation pit from collapsing. Therefore, the support replacement and removal work can be completed when the basement structure is constructed; due to the factthat the support replacement structure is lower one layer than the inner supports, the construction of the upper basement structure can be carried out after the dismantling of the inner supports is completed, the risk of leakage caused by secondary pouring of reserved holes in the basement outer wall can be avoided, the construction quality of the whole basement structure is effectively improved,the construction progress is accelerated, manpower and material resources are saved, the construction difficulty is small, and the safety is high.

Description

technical field [0001] The invention relates to a construction method and a structure for quickly changing braces of a support plate in a deep foundation pit, belonging to the technical field of construction. Background technique [0002] With the increasing maturity of my country's urban underground space development technology, deep foundation pit engineering has been widely used in housing construction and residential projects. These construction projects are often adjacent to existing projects and major municipal public facilities, etc., and have high requirements on the safety of foundation pits. For this reason, support technology in deep foundation pits has become an indispensable means of foundation pit safety support. In the existing technology, there are problems such as long cycle time, poor construction flexibility, and high leakage risk of secondary pouring in the inner support holes reserved on the outer wall of the basement when carrying out support replacemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/76E02D17/04
CPCE02D5/765E02D17/04
Inventor 崔浓辉孙瑞甲林荣运林文硕李红梅王珊
Owner CCFED THE FIRST CONSTR & ENG
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