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Upper portion and lower portion enlarged type cement soil composite pipe pile

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

Inactive Publication Date: 2017-03-08
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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  • Upper portion and lower portion enlarged type cement soil composite pipe pile
  • Upper portion and lower portion enlarged type cement soil composite pipe pile
  • Upper portion and lower portion enlarged type cement soil composite pipe pile

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Experimental program
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Effect test

Embodiment Construction

[0037] Such as figure 1 , figure 2 with image 3 The described upper and lower enlarged cement-soil composite pipe piles include prefabricated concrete pipe piles 1, a central hole 11 is arranged in the prefabricated concrete pipe piles, and the first cement-soil piles 2 are filled in the central hole 11, and the prefabricated concrete pipe piles A second cement-soil pile 3 is arranged outside the pile 1, and the first cement-soil pile 2 and the second cement-soil pile 3 are cast-in-situ cement piles. The prefabricated concrete pipe pile 1, the first cement-soil pile 2 and the second cement-soil pile 3 are arranged coaxially. The pile diameter of the second cement-soil pile 3 is at least 20 mm larger than the outer diameter of the precast concrete pipe pile 1 . The second soil-cement pile 3 includes upper, middle and lower sections, the upper section 31 of the soil-cement pile is located at the cohesive soil 4 (relatively hard soil layer) in the hard plastic-hard state, an...

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Abstract

An upper portion and lower portion enlarged type cement soil composite pipe pile comprises a precast concrete pipe pile body, a central hole is formed in the precast concrete pipe pile body and filled with a first cement soil pile body, a second cement soil pile body is arranged outside the precast concrete pipe pile body and comprises an upper segment, a middle segment and a lower segment, the diameters of the upper segment and the lower segment of the second cement soil pile body are larger than that of the middle segment thereof, and a first variable-diameter segment and a second variable-diameter segment are arranged between the upper segment and the middle segment as well as between the middle segment and the lower segment respectively. Compared with a single-diameter pipe pile equal in height and made of equivalent concrete, the upper portion and lower portion enlarged type cement-concrete composite pipe pile has the advantages that the bearing capacity of a pile foundation is higher, and the composite pipe pile can be made shorter on the premise that bearing capacity design requirements are met; shaft resistance of the pile foundation can be given to full play, and accordingly the composite pipe pile is particularly suitable for geological conditions with upper soil layers superior to lower soil layers.

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 pipe 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, the engineering properties of the upper and lower soil layers of the pile foundation are better, and when the middle soil layer is relatively weak, 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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/48E02D5/50
CPCE02D5/48E02D5/50
Inventor 周同和
Owner 周同和
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