Variable-rigidity lateral confinement type rock-soil mechanics testing device and method

Abstract

The invention belongs to the technical field of rock-soil medium mechanical behavior experiment testing, and particularly relates to a variable-rigidity lateral confinement type rock-soil mechanical testing device and method. According to the device, active force is not independently applied in two horizontal directions, and lateral constraint counterforce is generated when the test sample generates lateral deformation constraint by utilizing axial load. By means of the device, various rock-soil medium mechanical tests can be completed, the cost is low, the structure is simple, rigidity-adjustable constraint is used for passively providing lateral stress, the true triaxial stress state of rock-soil media is achieved, a uniaxial compression test, a conventional triaxial compression test anda true triaxial compression test can also be carried out, and the utilization rate is high. An upper gland and a lower bottom plate are fixed to the top and the bottom of the hoop cylinder respectively, four constraint bodies are evenly arranged on the inner wall of the hoop cylinder, the outer side wall of each constraint body is attached to the inner wall of the hoop cylinder, and a pressure sensor and a displacement sensor are installed in each constraint body.

Description

technical field [0001] The invention belongs to the technical field of rock-soil medium experiments, and in particular relates to a rock-soil mechanics test device and method with variable stiffness lateral confinement. Background technique [0002] Geotechnical parameters are the key to carry out theoretical research on geotechnical mechanics and develop geotechnical engineering technology. The reasonable and efficient determination of rock and soil mechanical parameters requires reliable testing devices and testing methods. Therefore, continuous research and development of new testing technologies according to actual engineering needs can promote the development of geomechanics and engineering. In the field of rock and soil mechanics testing methods and testing techniques, the most commonly used testing device is a triaxial testing device, including conventional triaxial and true triaxial. In a conventional triaxial test, the stresses in the two horizontal directions are...

AI Technical Summary

Problems solved by technology

Model tests often require the size of the sample to be continuously increased. Since the loaded tonnage is proportional to the square of the sample size, this further increases the cost of the true triaxial test.

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