Upper-expansion cement composite pile

A cement-soil pile and cement-soil technology, which is applied in the field of foundation engineering, can solve the problems of waste, increase in pile diameter and pile length, etc., and achieve the effects of good effect, saving concrete and steel bars, and convenient construction.

Inactive Publication Date: 2017-05-31
周同和
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] 1) 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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  • Upper-expansion cement composite pile
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  • Upper-expansion cement composite pile

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] The present invention will be further described below in conjunction with specific embodiments.

[0036] Such as figure 1 with figure 2 The shown upper enlarged cement-soil composite pile includes prefabricated concrete pipe pile 2, and the cement-soil pile is a cement-soil mixing pile or a cement-soil pouring pile. The precast concrete pipe pile 2 is provided with a central hole, and the central hole is filled with a first cement soil pile, and a second cement soil pile 1 is arranged outside the precast concrete pipe pile 2, and the second cement soil pile 1 includes upper and lower sections. , the pile diameter of upper section 11 is greater than the pile diameter of lower section 13, and the pile diameter of second cement-soil pile 1 upper section 11 is 820mm, and the pile diameter of lower section 13 is that the first variable diameter section 12 is set between upper section 11 and lower section 13 of 620mm.

[0037] Described prefabricated concrete pipe pile 2 c...

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PUM

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Abstract

The invention discloses an upper-expansion cement composite pile which comprises a precast concrete tubular pile, wherein a center hole is formed in the precast concrete tubular pile and filled with a first cement pile; a second cement pile is arranged outside the precast concrete tubular pile; the second cement pile comprises upper and lower sections; the pile diameter of the upper section is greater than that of the lower section; and a first variable-diameter section is arranged between the upper section and the lower section. Compared with a single-diameter pile body of the same length and equal concrete dosage, the upper-expansion cement composite pile disclosed by the invention has larger pile foundation bearing capacity; on the premise of meeting the bearing force design requirements, relatively short pile is realized; and meanwhile, the capability development of the side resistance of the pile foundation is stronger, and the upper-expansion cement composite pile is particularly suitable for the geological conditions that upper soil is obviously superior to lower soil.

Description

technical field [0001] The invention belongs to the technical field of foundation engineering, and in particular relates to an upper enlarged cement-soil composite pile. Background technique [0002] With the development of the construction industry, the scale of the building is increasing day by day, and the additional load on the foundation is increasing. For some high-rise and super high-rise buildings, the natural foundation and composite foundation can no longer meet the requirements of the foundation bearing capacity. Under this condition, the pile foundation It is a commonly used basic form. For some areas where the engineering property of the upper soil layer of the pile foundation is better than that of the lower soil layer of the pile body, the pile foundation generally adopts increasing the pile length to penetrate the weak layer or increasing the pile diameter to increase the lateral resistance to ensure the bearing capacity of the pile foundation. The pile type...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/50
CPCE02D5/50
Inventor 周同和
Owner 周同和
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