Composite foundation pile with lower portion enlarged diameter section and construction method of composite foundation pile

A construction method and composite foundation technology, which is applied in the field of foundation engineering, can solve the problems of waste, pile diameter, pile length increase, etc., and achieve the effects of short pile length, reduced negative friction resistance, and increased bearing capacity of the lower pile

Inactive Publication Date: 2016-02-03
周同和
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The influence of negative friction resistance needs to be deducted when designing the pile foundation size, and the pile diameter and pile length will increase accordingly, resulting in a lot of waste

Method used

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  • Composite foundation pile with lower portion enlarged diameter section and construction method of composite foundation pile
  • Composite foundation pile with lower portion enlarged diameter section and construction method of composite foundation pile
  • Composite foundation pile with lower portion enlarged diameter section and construction method of composite foundation pile

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Experimental program
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Embodiment Construction

[0035] The present invention will be further described below with reference to specific embodiments.

[0036] like figure 1 The shown composite foundation pile with an enlarged diameter section at the lower part includes a precast concrete pile body 1, and the precast concrete pile body is a PHC pipe pile. The upper part of the precast concrete pile body 1 is located in the weaker soil layer 4, the lower part is located in the better soil layer 5, and the lower part of the precast concrete pile body 1 is located outside the better soil layer 5 with a cast-in-place pile 3. The cast-in-place pile 3 includes a cylindrical pile body 32 and a conical cylinder 31 connected to the upper part of the pile body 32. The diameter of the lower bottom surface of the conical cylinder 31 is equal to the diameter of the pile body 32, and the pile body 32 and the conical cylinder 31 is an integral structure, and the included angle between the generatrix of the conical cylinder 31 and the cente...

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PUM

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Abstract

The invention discloses a composite foundation pile with a lower portion enlarged diameter section and a construction method of the composite foundation pile. The composite foundation pile comprises a precast concrete pile body, and a cast-in-place pile is arranged on the outer side of the lower portion of the precast concrete pile body. The construction method comprises the following steps that (1) a hole is formed by a drilling machine or manually; (2) mechanical or manual chambering is conducted on a soil layer below a soft soil layer; (3) cured materials are poured into the hole; and (4) the precast concrete pile body is implanted into the hole. Compared with a pile body of a single diameter and the same length, the bearing capacity of the composite foundation pile with the lower portion enlarged diameter section is greatly improved, the pile is shorter on the premise of meeting the requirement of designed bearing capacity, and the playing capacity of side resistance and tip resistance of a pile foundation is improved.

Description

technical field [0001] The invention belongs to the technical field of foundation engineering, in particular to a composite foundation pile with an enlarged diameter section at the lower part, and also relates to a construction method of the composite foundation pile. Background technique [0002] With the development of the construction industry, the building scale is increasing, and the additional load of the foundation is getting larger and larger. For some high-rise and super high-rise buildings, the natural foundation and composite foundation can no longer meet the requirements of the bearing capacity of the foundation. Under this condition, the pile foundation It is a commonly used basic form. When there are weak soil layers such as ultra-thick miscellaneous fill soil, soft soil, liquefiable soil and collapsible soil on the upper part of the foundation in some areas, the pile foundation generally adopts increasing the length of the pile to offset the negative friction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/50E02D5/48E02D5/58
Inventor 周同和
Owner 周同和
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