Foundation underpinning method around foundation pit

A foundation pit edge and foundation technology, which can be used in foundation structure engineering, construction, sheet pile walls, etc., can solve problems such as overturning and uneven settlement of building foundations, and achieve the effect of ingenious conception, avoidance of uneven settlement, and simple steps.

Inactive Publication Date: 2012-08-22
GUANGDONG TIANJING CONSTR
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  • Description
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a foundation underpinning method for solving uneven settlement or even overturning of building foundations caused by excavation of foundation pits

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  • Foundation underpinning method around foundation pit
  • Foundation underpinning method around foundation pit

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Embodiment Construction

[0024] The concept, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The protection scope of the present invention. In addition, all the connection / connection relationships mentioned in this article do not refer to the direct connection of components, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions.

[0025] refer to figure 1 , a method for foundation underpinning around a foundation pit, comprising the foll...

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Abstract

The invention discloses a foundation underpinning method around a foundation pit. The method comprises the following steps of: 1) selecting the place for excavating a foundation pit, and arranging a row of cast-in-situ bored piles on the two opposite sides of the building foundation close to the foundation pit side respectively; 2) excavating the soil close to the foundation pit side till the foundation bottom, and planting bars on the two opposite sides of the building foundation; 3) binding the pile cap beam steel bar, and enabling the planted bars to extend into the pile cap beam so that the cast-in-situ bored piles are connected with the building foundation; 4) pouring the pile cap beam, enabling the building foundation to penetrate through the pile cap beam to form a reinforced concrete structure with the cast-in-situ bored piles on the two opposite sides, wherein the side section of the structure has an 'n' shape; and 5) excavating the foundation pit. By using the method in the invention, a foundation protection support and expansion system is built, the side load of the original building foundation is underpinned to the pile bodies on the two sides, and the differential settlement and overturning collapse caused by excavating the shallow-foundation building can be avoided. The method disclosed by the invention can be applied to the excavation operation of a foundation pit with relatively shallow building foundations on adjacent sides.

Description

technical field [0001] The invention relates to a foundation underpinning method around foundation pits used in building engineering construction. Background technique [0002] Due to the complex environment around the construction site, there are often buildings built on shallow foundations around the foundation pit. Therefore, if the foundation pit is excavated rashly without protection measures, it is easy to cause damage to the building after the foundation pit is dewatered or earthwork is excavated. The uneven settlement of the foundation, even overturning and collapsing, directly affects the construction safety. The current solution is usually to install support on the side of the foundation pit, but this is not very effective. If the foundation of the building can be underpinned to other supports (such as deep piles), even a shallow foundation can withstand the side settlement caused by excavation of the foundation pit. However, no such method has been seen so far. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/48E02D5/36
Inventor 张国胜
Owner GUANGDONG TIANJING CONSTR
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