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Method for testing shearing mechanical characteristic of pile-soil contact surface

A technology of mechanical properties and testing methods, applied in the direction of applying stable shear force to test material strength, strength characteristics, measuring devices, etc., can solve problems such as inability to apply pressure simulation, improve test efficiency, ensure test accuracy, improve Simulate the effect of similarity

Inactive Publication Date: 2018-09-28
广东交大检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this device can only be applied to simulate the working conditions of pile foundations in permafrost environment, and cannot be applied to the simulation of different lateral pressures around piles.
The above test device does not involve the different situations of horizontal ground pressure in actual engineering, so it is necessary to provide a test method for the shear mechanical properties of the pile-soil contact surface

Method used

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  • Method for testing shearing mechanical characteristic of pile-soil contact surface
  • Method for testing shearing mechanical characteristic of pile-soil contact surface
  • Method for testing shearing mechanical characteristic of pile-soil contact surface

Examples

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Embodiment 1

[0046] Such as figure 1 As shown, a method for testing the shear mechanical properties of the pile-soil contact surface of the present invention uses a test device for the shear mechanical properties of the pile-soil contact surface to test, comprising the following steps:

[0047] 1. Install the pile sample: first place the prefabricated pile sample 6 in the compression chamber 2 of the test device, and adjust the horizontal fixing device 5 so that the surface of the roller 5.1 of the horizontal fixing device is close to the outer surface of the pile sample to control There is no horizontal displacement of the pile sample; in this step, pads should be placed at the bottom of the sample pile to prevent the pile from sliding down during installation;

[0048] 2. Install the pressure device: install the pressure device 4 on the reaction force frame 1.3, so that the top of the pile sample is connected to the vertical loading device 4.1 through the vertical dowel bar 4.2, and the ...

Embodiment 2

[0063] Such as figure 2 Shown, another kind of pile-soil contact surface shear mechanical property testing method of the present invention comprises the following steps:

[0064] 1. Install the pile sample: first place the prefabricated pile sample 6 in the compression chamber 2 of the test device, and adjust the horizontal fixing device 5 so that the surface of the roller 5.1 of the horizontal fixing device is close to the outer surface of the pile sample to control There is no horizontal displacement of the pile sample; in this step, pads should be placed at the bottom of the sample pile to prevent the pile from sliding down during installation;

[0065] 2. Install the pressure device: install the pressure device 4 on the reaction force frame 1.3, so that the top of the pile sample is connected to the vertical loading device 4.1 through the vertical dowel bar 4.2, and the distance between the pile sample and the vertical dowel bar A displacement sensor A4.3 and a pressure ...

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Abstract

The invention discloses a method for testing a shearing mechanical characteristic of a pile-soil contact surface. The method comprises the following steps that 1, a pile sample is put in a pressure chamber of a testing device, and a horizontal fixing device is adjusted; 2, a pressure device is installed on a counter-force frame; 3, horizontal thrust devices are debugged; 4, a soil sample is arranged; 5, multiple unit top plates are spliced to form a top plate; 6, a horizontal pressure is exerted to the soil sample; 7, pile-soil contact surface shearing is tested. By adopting the method, horizontal thrusts can be exerted to different sides of the pressure chamber through the multiple thrust devices so as to exert horizontal forces to the sides of the pile sample by extruding the soil sample, and pile foundation stress working conditions can be effectively simulated under the situation that soil body pressures exerted in different directions around a pile are different and have high similarity with actual working conditions. The testing method is reasonable in design, simple in process and easy and convenient to operate and can test pile foundations of round and square piles and thelike with regular-shaped cross sections.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a method for testing the shear mechanical properties of pile-soil contact surfaces. Background technique [0002] With the rapid development of urban construction in our country, in order to build more building areas in a smaller land area, buildings have to develop to high-rise buildings. Therefore, in recent years, more and more high-rise and super high-rise buildings have been constructed. The bearing capacity of the foundation foundation is required to be high, and the pile foundation is widely used in foundation engineering as a main foundation form. Tend to diversification, such as soil retaining piles are mostly used in the initial construction of the project to support and retain soil. However, in order to give full play to the role of soil retaining piles and reduce project cost, the soil retaining piles are used for vertical bearing. Therefore, the bearing cap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24
CPCG01N3/24G01N2203/0025G01N2203/0676
Inventor 乔世范檀俊坤蔡子勇孙晓徐平张学民王文富李东瑞
Owner 广东交大检测有限公司
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