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Ultra-deep large-section square supporting pile and construction method thereof

A construction method and a technology for supporting piles, which are applied in excavation, sheet pile walls, foundation structure engineering, etc., can solve problems such as foundation pit support construction conflicts, save construction period, speed up hole formation, and support simple operations Effect

Inactive Publication Date: 2012-12-19
CHINA CONSTR SECOND ENG BUREAU LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a super-deep large cross-section square support pile and its construction method, to solve the problem that the subway shield construction and the foundation pit support construction will cause problems when the foundation pit support construction is carried out beside the subway shield area conflicting technical issues

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  • Ultra-deep large-section square supporting pile and construction method thereof
  • Ultra-deep large-section square supporting pile and construction method thereof
  • Ultra-deep large-section square supporting pile and construction method thereof

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Embodiment Construction

[0026] Examples see Figure 1-3 As shown, this kind of ultra-deep large cross-section square support pile 1 is arranged on the side of the foundation pit 9 close to the shield area 10 of the subway. The section length a of the ultra-deep large-section square support pile 1 is 2.6 meters to 3.6 meters, the section width b is 2.0 meters to 3.0 meters, and the depth c is 40.0 meters to 45.0 meters. The ultra-deep and large-section square support pile 1 includes a pile hole retaining wall 2 and a pile core 7. Both the pile hole retaining wall 2 and the pile core 7 are cast-in-place reinforced concrete structures, and the pile hole retaining wall 2 is composed of a section of a square casing 3 Spliced ​​together, the inner surface of the square casing is a slope 4 inclined from bottom to top towards the pile core.

[0027] see image 3 , Figure 4 A boss 5 is provided at the joint between the upper and lower square casings and the upper surface of the lower square casing near th...

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Abstract

The invention relates to an ultra-deep large-section square supporting pile and a construction method thereof. The ultra-deep large-section square supporting pile is arranged on one side of a foundation pit close to a metro shield area and comprises a pile hole retaining wall and a pile core, wherein the pile hole retaining wall and the pile core both have cast-in-place reinforced concrete structures; the pile hole retaining wall is formed by splicing sections of square protecting cylinders; inner lateral surfaces of the square protecting cylinders are inclined planes which are inclined to the pile core from bottom to top; a lug boss is arranged at a seam of upper and lower two sections of square protecting cylinders and on one side of the upper end face of the lower square protecting cylinder close to the pile core; and double-slurry liquid composed of sodium silicate and cement paste is filled in a gap between the lug boss and the square protecting cylinders. The anti-skidding capacity of the ultra-deep large-section square supporting pile is strong, so that the foundation pit support construction and the metro shield construction are no longer conflicted after the supporting pile is adopted; the foundation pit support construction and the metro shield construction can be performed alternately; and the construction period of the foundation pit support is greatly shortened.

Description

technical field [0001] The invention relates to a foundation pit support technology, in particular to a foundation pit support pile and a construction method thereof. Background technique [0002] With the transformation of old cities and the expansion of new urban districts, a large number of high-rise buildings have emerged in various cities, and the height of buildings has continued to increase. There are a series of problems such as tension, complex engineering geological conditions, and many original buildings and municipal facilities around the foundation pit. How to ensure the stability of foundation pit construction and the safe use of existing buildings and municipal facilities adjacent to the foundation pit have become the first technical problems to be solved in foundation construction. At present, in the design and construction technology of foundation pit support in our country, a variety of practical foundation pit support methods have been developed, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/34E02D17/02
Inventor 邓江权石立国张茅冯金波余德浩
Owner CHINA CONSTR SECOND ENG BUREAU LTD
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