A Rock Tension-compression Ring Shear Seepage Tester

Abstract

The invention belongs to the technical field of rock mechanical test devices, and discloses a multi-stress path rock tension and compression ring shear seepage tester which comprises a base, an upper shear box, a lower shear box, a first frame, a second frame, an axial loading system, a torque loading system and a seepage structure. The first frame is fixed onto the base, the second frame is fixed onto the first frame, the lower shear box is fixed onto the base, the upper shear box and the lower shear box are opposite, an annular upper sample groove and an annular lower sample groove are formed in the upper shear box and the lower shear box respectively, and the torque loading system is connected with an output end of the axial loading system. The seepage structure comprises a confining pressure sleeve, a sealing ring, a water inlet passage and a water outlet passage, wherein the confining pressure sleeve is fixed onto the lower shear box, the sealing ring is arranged on the outer wall of the upper shear box, and the water inlet passage and the water outlet passage are arranged on the upper shear box and the lower shear box respectively and communicated with a cavity between the upper shear box and the lower shear box.

Description

technical field [0001] The invention relates to the technical field of rock mechanics test devices, in particular to a rock tension-compression ring shear seepage tester. Background technique [0002] The shear strength of rock is the ability of rock to resist shear failure, and it is one of the important characteristics required in rock mechanics research. In the field of geotechnical engineering, test methods are widely used to determine the shear strength index of rock. The test methods for measuring the shear strength of rock can be divided into two categories: indoor test and field test. Among them, indoor tests usually include direct shear test, wedge shear test and triaxial compression test. Field tests are usually direct shear tests. [0003] In the existing test method, the test loading method and the selection of the sample structure form make the shear stress distribution on the shear surface uneven during the shear process, and the shear surface is progressive...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a rock tension-compression ring shear seepage tester, which solves the technical problems in the prior art that the seepage characteristics of the rock seepage test are one-sided, and the seepage characteristics cannot be truly restored to the stress state during the shearing process of the sample. The technical problem is that the reliability of the seepage characteristics is not high

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