Rock soil medium pull cutting strength test analysis method

Abstract

The invention discloses a test and analysis method for rock-soil medium tension-shear strength, and relates to rock-soil medium tension-shear technology. The structure of this device is: install the sample (1) in the sample holder (2); connect the axial pressure system (3) with the sample (1), load and record the axial pressure; the internal pressure system (4) and The sample (1) is connected to load and record the internal pressure; the tension-shear point capture device (5) is connected to the sample (1) to capture the tension-shear point; the main steps of this method are: using a thick-walled cylindrical The rock-soil tensile-shear failure test can be realized by the crack instrument; the calculation method of the tensile-shear strength and the drawing of the tensile-shear strength curve. The invention has the advantages of simple and convenient experimental operation, high degree of automation and good repeatability; the invention can also be applied to the test of rock-soil medium compressive shear strength without modification, expanding the application range of traditional thick-walled cylinder 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...

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 methods of tensile and shear strength of rock-soil media, and most of the existing research results are cumbersome and difficult to operate. Not high, needs to be improved

Images