Test and analysis method of geotechnical media tension-shear strength

A rock-soil medium and analysis method technology, applied in the direction of testing material strength by applying stable shear force, testing material strength by applying stable tension/compression, etc., can solve the problem of low accuracy, lack of theoretical models and experimental data systems Proofreading, cumbersome test process and other issues

Active Publication Date: 2015-12-23
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the lack of systematic proofreading of theoretical models and experimental data due to the lack of test data on tension and shear, there are few studies on the test

Method used

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  • Test and analysis method of geotechnical media tension-shear strength
  • Test and analysis method of geotechnical media tension-shear strength
  • Test and analysis method of geotechnical media tension-shear strength

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Embodiment Construction

[0050] Below in conjunction with accompanying drawing and embodiment describe in detail:

[0051] 1. Device

[0052] 1. Overall

[0053] like figure 1 , the device includes a sample 1, a sample holder 2, an axial pressure system 3, an internal pressure system 4 and a tension-shear point capture device 5;

[0054] Its connection relationship is:

[0055] Install the sample 1 in the sample holder 2;

[0056] The axial pressure system 3 is connected to the sample 1, and the axial pressure is loaded and recorded;

[0057] The internal pressure system 4 is connected to the sample 1, and the internal pressure is loaded and recorded;

[0058] The tension-shear point capture device 5 is connected to the sample 1 to realize the capture of the tension-shear point.

[0059] 2. Functional components

[0060] 1) Sample 1

[0061] Sample 1 is a hollow cylindrical rock-soil sample, which is the test and analysis object of the present invention.

[0062] 2) Sample holder 2

[0063] Th...

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Abstract

The present invention discloses a test and analysis method of geotechnical media tension-shear strength, and relates to geotechnical media tension-shear technology. The structure of the device is as below: a specimen (1) is installed in a holder (2); an axial pressure system (3) is connected to the specimen (1), and used for loading and recording axial pressure; an internal pressure system (4) is connected to the specimen (1), and used for loading and recording internal pressure and a tension-shear point capture device (5) is connected to the specimen (1) to achieve capture of the tension-shear point. The main steps of the method are as below: using a thick-walled cylinder-type crack instrument to achieve a geotechnical tension-shear failure test; calculating tension-shear strength; and drawing a tension-shear curve. The present invention has the advantages of simple experiment operation, high degree of automation and good repeatability. The method can be applied almost without modification to rock media compression shear strength test, and expands the scope of application of a traditional thick-walled tube fracturing experiment technology.

Description

technical field [0001] The invention relates to rock-soil medium tensile-shear technology, in particular to a test and analysis method for rock-soil medium tensile-shear strength. Wherever the combined stress state of tension and shear may appear in geotechnical engineering, it is a potential application field of this technology, such as shaft engineering, anchor engineering, tunnel engineering, slope engineering and underground powerhouse. Background technique [0002] Many geotechnical engineering practices increasingly show that the stress path and stress state suffered by rock and soil are extremely complex, and the different paths of unloading and loading may cause the rock and soil medium to be in a state of tension-shear stress, so there are more and more occasions where tension-shear failure occurs . For example, in underground projects such as mining, tunnels and underground powerhouses, due to the heterogeneity and inelasticity of rock and soil, the unloading stre...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N3/24
Inventor 白冰刘明泽何媛媛李小春
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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