A self-balancing floating shear loading device for rock testing

Abstract

The invention relates to a self-balancing floating type shear loading device for rock testing. The self-balancing floating type shear loading device comprises a horizontal loading framework, a normal loading framework and a shear box which is used for placing a rock sample, wherein the horizontal loading framework penetrates through the normal loading framework and is in criss cross arrangement with the normal loading framework; a horizontal wheel is arranged at the bottom part of the horizontal loading framework; a horizontal guide rail is arranged at the bottom part of the horizontal wheel; the horizontal loading framework moves horizontally along the horizontal guide rail; the shear box is arranged in the horizontal loading framework; a horizontal loading mechanism is arranged on one end of the horizontal loading framework; a normal loading mechanism is arranged at the upper part of the normal loading framework. According to the self-balancing floating type shear loading device disclosed by the invention, the horizontal loading framework is separated from the normal loading framework, and the horizontal loading frame can integrally do horizontal movement, so that installation of a larger-size sample and the shear box is convenient; a friction reducing linear guide rail is arranged, a friction force between the shear box and an external structure during a shearing process can be reduced, and horizontal deflection is enabled not to be caused, so that a testing result is more accurate and reliable.

Description

technical field [0001] The invention relates to a rock test test loading frame, in particular to a self-balancing floating shear loading device used for rock test. Background technique [0002] In nature, the rock mass is composed of rock blocks and joints (structural planes). The existence of joints has a significant impact on the properties of the rock mass. The existence of joints not only weakens the strength of the rock mass, but also provides a flow channel for water flow and induces various kind of disaster. As the basic component of rock mass structure, single joint's engineering mechanics parameters are hot and difficult issues that have been widely concerned in rock mechanics but have not been well resolved. [0003] Indoor direct shear test (direct shear test) is the main method to study the relevant characteristics of a single joint. The horizontal loading cylinder and the normal loading cylinder of the traditional direct shear testing machine are both fixed on ...

AI Technical Summary

Problems solved by technology

In the joint shear-seepage coupling test machine, in order to ensure the sealing of the water flow during the shearing process, the joint shear-seepage coupling test box has a complex structure and sealing system, and the weight is relatively large. The frame of the test machine is still When using an overall frame similar to that of an ordinary direct shear testing machine, it is necessary to install a shear box and a sample inside the overall frame during the test. Due to the heavy weight of the shear box, it is difficult to place the shear box accurately. It is difficult to align the axial loading cylinder and the shear box, which leads to horizontal deviation and vertical warpage of the sample during the test, which leads to certain errors in the test results

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