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Method for enhancing bearing capacity of composite foundation and rigid pile thereof

A bearing capacity, enhanced composite technology, applied in sheet pile wall, soil protection, infrastructure engineering and other directions, can solve the problems of high cost and insufficient bearing capacity, achieve low manufacturing, convenient manufacturing, installation and use, low cost The effect of project cost

Active Publication Date: 2014-02-05
NANJING YUZHUANG FOUND ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to invent a method to enhance the bearing capacity of the composite foundation and to design a matching rigid pile to solve the problem that the bearing capacity of the existing composite foundation cannot be fully exerted and the cost is too high.

Method used

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  • Method for enhancing bearing capacity of composite foundation and rigid pile thereof
  • Method for enhancing bearing capacity of composite foundation and rigid pile thereof
  • Method for enhancing bearing capacity of composite foundation and rigid pile thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Such as Figure 1-2 shown.

[0025] A method for enhancing the bearing capacity of a composite foundation, which uses a pile cap 2 capable of compressive deformation and whose compression modulus is equivalent to that of the foundation soil (structure such as figure 2 As shown), the load of the superstructure of the composite foundation is transferred to the natural foundation soil layer first through the coordination of the foundation and the cushion layer, so that the natural foundation soil layer sinks equivalent to the compressible deformation of the pile cap, thereby improving the natural foundation soil The bearing capacity is 20-50%, and at the same time, the rigid pile produces a downward penetration during the foundation settlement process to improve the bearing capacity and stability of the rigid pile. Such as figure 1 shown. The compression modulus of the pile cap is equivalent to that of the foundation soil, and its profile matches the end face of the ri...

Embodiment 2

[0031] Such as Figure 1-2 shown.

[0032] A rigid pile used to enhance the bearing capacity of a composite foundation, which includes a pile body 1, and the upper end of the pile body 1 is provided with a pile cap 2 that can be deformed under pressure to match the shape of its end face, such as figure 2 shown. The pile cap 2 should be made of a material whose compression modulus is equivalent to that of the foundation soil, such as extruded foam and other materials. The thickness can be 5-50 mm, and the optimum range is 10-30 mm. The extruded foam pile cap should be 100% continuous closed-cell structure, with certain compressive strength, good dimensional stability and weather resistance. Between the top of the pile cap 2 and the mattress layer 4, a pressure-resistant body 3 that prevents the mattress layer from piercing the extruded foam is additionally installed. The pressure-resistant body 3 can adopt a steel plate with a thickness of not less than 1.0 mm. In practice,...

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Abstract

Discloses are a method for enhancing the bearing capacity of a composite foundation and a rigid pile thereof. The method is characterized by mounting a pile cap which can be deformed under compression and is same to foundation soil in compression modulus at the top of the composite foundation rigid pile to transmit the super-structural loads of the composite foundation to natural foundation soil through the coordination of a base and a cushion layer, then enable the natural foundation soil to generate subsidence equivalent to the compressible deformation of the pile cap, further improve the bearing capacity of the natural foundation soil by more than 20% and meanwhile enable the rigid pile to generate downward piercing and occluding effects during the foundation subsidence process to improve the bearing capacity and the stability of the rigid pile. The method for enhancing the bearing capacity of the composite foundation is simple and easy to operate and can enhance the bearing capacity by 20%-50%.

Description

technical field [0001] The invention relates to a construction technology, especially a foundation treatment technology, in particular to a method for enhancing the bearing capacity of a composite foundation (CM foundation) and its rigid pile used in the treatment of a composite foundation (CM foundation). Background technique [0002] At present, composite foundation (CM) is a type of foundation commonly used in high-rise buildings. It is composed of vertical reinforcement of the foundation, cushion (sand and gravel graded cushion) and inserted foundation reinforcement and natural foundation soil. . It is that the superstructure load is transmitted through the coordinated transmission of the rigid foundation and the cushion layer, and is transmitted to the composite foundation formed by the joint action of the vertical foundation reinforcement and the natural foundation soil, but the rigidity of the natural foundation soil and the rigid pile is greatly different. Its defor...

Claims

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Application Information

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IPC IPC(8): E02D3/08E02D5/22
Inventor 徐勇华戚文相
Owner NANJING YUZHUANG FOUND ENG CO LTD
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