Deep function pit supporting structure in karst geology condition and construction method thereof

A technology for deep foundation pit support and geological conditions, which is applied in the direction of foundation structure engineering, soil protection, excavation, etc., can solve problems such as water leakage, achieve small deformation of the support structure, good support effect, and prevent difficult consolidation Effect

Inactive Publication Date: 2015-01-28
YUNNAN CONSTR ENG GRP +2
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the leakage problem of foundation pit engineering under karst geological conditions, and provide a deep foundation pit support structure that can effectively solve the serious water leakage problem in the foundation pit excavation process under karst geological conditions

Method used

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  • Deep function pit supporting structure in karst geology condition and construction method thereof
  • Deep function pit supporting structure in karst geology condition and construction method thereof
  • Deep function pit supporting structure in karst geology condition and construction method thereof

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Embodiment Construction

[0017] The present invention will be described in further detail below through the accompanying drawings and examples, but the protection scope of the present invention is not limited to the content described.

[0018] Such as figure 1 , figure 2 , image 3 As shown, a deep foundation pit support structure under karst geological conditions is composed of an enclosed underground diaphragm wall 1 and a horizontal grouting reinforcement 2 poured in the area enclosed by the underground diaphragm wall. The grouting reinforcement 2 is located below the design elevation of the foundation pit bottom, and the thickness is not less than 3.0m.

[0019] The deep foundation pit project under karst geological conditions can adopt the combined support structure of underground diaphragm wall 1 + pit bottom grouting reinforcement 2. Firstly, the construction of underground diaphragm wall 1 will be carried out. The designed pit bottom position is grouted to reinforce the foundation, and fin...

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Abstract

The invention provides a deep foundation pit supporting structure in a karst geology condition and a construction method thereof. The deep foundation pit supporting structure comprises an encircled underground continuous wall (1), and a horizontal grouting reinforcing body (2) which is poured into an encircling area of the underground continuous wall. With the adoption of the deep foundation pit supporting structure, the problem due to serious water leakage occurring in the excavating of the foundation pit under the karst geology condition can be effectively solved; the underground continuous wall has a good effect, and the supporting structure is small in deformation; in addition, the water stopping effect of the sidewall of a foundation pit is obvious, so that the circumstance of water leaking nearly not occurs; the area in the bottom of the foundation pit is subjected to foundation processing by the grouting mode to form a grouting reinforcing body, and thus the channel for water in karst fissures at the bottom of the pit can be effectively cut, and as a result, the problem that water runs from the bottom of the pit can be completely solved; the cement and soluble glass grout is used as the grouting material which can effectively prevent the cement grout from be washed out by the groundwater, and the water blocking and permeating preventing performances of the grouting reinforcing body can be obviously improved.

Description

technical field [0001] The invention relates to the technical field of building foundation pit engineering, and mainly relates to a deep foundation pit supporting structure and a construction method thereof. Background technique [0002] Karst, also known as karst (KARST), is the geological action of water on soluble rocks (carbonate rock, gypsum, rock salt, etc.), which is mainly chemically dissolved, supplemented by mechanical actions such as erosion, latent erosion, and collapse of flowing water. And the general term for the phenomena produced by these effects. The landform caused by karst is called karst landform (karst landform). Karst landforms are widely distributed in my country, especially in the southwest region. With the rapid advancement of urban construction in our country, more and more construction projects are facing karst geological conditions. As far as the foundation pit engineering under karst geological conditions is concerned, since the karst geology...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04E02D3/12
CPCE02D17/04E02D3/12
Inventor 王剑非王晓燕殷华富杨少真李志平周成明王晓曙杨世相王自忠郑云刚孟应磊周麟杨成苏兰忠
Owner YUNNAN CONSTR ENG GRP
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