Portable device for testing direct shearing of rock mass

Abstract

The invention discloses a portable device for testing the direct shearing of a rock mass and a shearing testing method in the fields of rock mechanics and engineering. The device comprises a detachably connected hydraulic system, a compression system and a data acquisition terminal, the compression system comprises an upper shearing box and a lower shearing box, the upper shearing box and the lower shearing box are oppositely arranged, a vertical hydraulic cylinder is arranged at the top part of the upper shearing box, a pushing rod of the vertical hydraulic cylinder is provided with a stay cord to be connected with the lower shearing box; and an upper horizontal hydraulic cylinder and a lower horizontal hydraulic cylinder are respectively arranged on the two opposite sides of the upper shearing box and the lower shearing box, and pushing rods of the upper horizontal hydraulic cylinder and the lower horizontal hydraulic cylinder are respectively provided with stay cores to be connectedwith the upper shearing box and the lower shearing box. The device has the beneficial effects that the device is convenient to carry, the rock mass is directly acquired on the scene to test the shearing, the transportation cost is reduced, in addition, the compression system is ingenious in design and simple in structure and is suitable for most of regular or irregular materials, and the device has the advantages of wide scope of application, improved control system, reliable testing result and the like.

Description

technical field [0001] The invention relates to the field of rock mechanics and engineering, in particular to a portable rock mass direct shear test device and a shear test method thereof. Background technique [0002] At present, most of the shear strength mechanical parameters for rock (body) are obtained through indoor triaxial compression indirect or direct shear tests, such as MTS rigid servo testing machine, true triaxial compression testing machine and direct shear instrument (such as CN1632510A ), etc., although its control system is perfect and the test results are reliable, it needs to transport a large number of rock samples to the room, which consumes a lot of manpower, material and financial resources, and the test pieces also need to be processed into standard sizes, which is not conducive to on-site inspection. In the field of hydropower and water conservancy and other engineering fields, on-site direct shear tests are also applied. It mainly obtains the shear...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it has high requirements for site space and processing of on-site test parts, and it costs a lot

Furthermore, it is difficult to directly measure the shear strength of rock masses such as fault gouge, fractured fracture zones, and structural surfaces that are difficult to process into standard sizes.

Images