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Novel vertical pit support structure and construction method thereof

An enclosure structure and a new type of technology, applied in the direction of foundation structure engineering, excavation, and sheet pile walls, etc., can solve the problems of poor rigidity of the pile body and high cost, and achieve the effects of good mobility, improved work efficiency, and reduced labor intensity

Inactive Publication Date: 2014-08-06
SHANGHAI CHENGDI CONSTR +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Overcome the disadvantages of the traditional enclosure structure SMW construction method, such as high cost and poor pile rigidity

Method used

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  • Novel vertical pit support structure and construction method thereof

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Embodiment 1

[0026] Such as figure 1 As shown, a novel vertical foundation pit enclosure structure and construction method thereof, comprising a foundation pit 10, a multiaxial cement-soil mixing pile 20 and a new cast-in-situ pile 30 of high-strength steel bars in the inner layer, and an outer multiaxial cement-soil mixing pile 20 The new cast-in-situ piles 30 with high-strength steel bars in the inner layer are respectively surrounded by the foundation pit 10, and the adjacent two multi-axis stirring pile bodies can be nested or overlapped. According to the specific construction environment on the site, during construction, the new type of FCW construction method multi-axis cement-soil mixing wall with outer row can be constructed first, and then the new type of bored pile with special high-strength steel bars in the inner layer can be constructed; the inner layer can also be constructed with special high-strength A new type of bored pile with steel bars, and then the outer row of new FC...

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Abstract

The invention relates to a novel vertical pit support structure and a construction method thereof. The novel vertical pit support structure comprises an outer novel efficient replacement-free intelligent five-axis or six-axis cement soil stirring wall (hereinafter referred to as FCW construction method) and an inner novel cast-in-situ bored piles made of special high-strength reinforcing steel bars. The outer novel FCW construction method multi-axis cement soil stirring wall serves as a water stopping curtain, and the inner cast-in-situ bored piles made of the special high-strength reinforcing steel bars serve as vertical stress components. The invention further provides a construction method of the novel vertical pit support structure. Compared with the prior art, the novel vertical pit support structure is small in influence on environments, good in pile forming quality, high in construction efficiency, evident in economic advantage, and the like.

Description

technical field [0001] The invention relates to a vertical structure technology for foundation pit enclosure, and the vertical structure and construction method of the enclosure can be widely used in soft soil areas. Background technique [0002] With the development of high-rise buildings, highways, and high-speed railways, the development of urban underground space is also increasing. Two-story and three-story basements are not uncommon. In addition, land resources in large cities are becoming more and more scarce. There are often high-rise buildings near foundation pits. Buildings, subways, etc. have correspondingly increased requirements for foundation pit enclosure. In economically developed areas such as the Yangtze River Delta in my country, the annual cost for foundation treatment and foundation pit enclosure is as high as more than 100 billion yuan. At present, the vertical enclosure structures used in foundation pit enclosure in my country mainly include undergrou...

Claims

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Application Information

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IPC IPC(8): E02D17/04E02D5/58E02D5/18
Inventor 谢晓东谢益飞周玉石赵伟明黄立伟鲍国强汤武张群邢克伦施问知
Owner SHANGHAI CHENGDI CONSTR
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