Bidirectional loading test device for rectangular rock mass

Abstract

The invention discloses a bidirectional loading test device for rectangular rock mass, comprising sleeves, a frame, force transmission press rods, a steel pad, a ball tray and four press plates; the sleeves pass through the frame and are fixed to the frame; the force transmission press rods include two opposite horizontal force transmission press rods and two opposite vertical force transmission press rods, one ends of the force transmission rods pass through the sleeves and connect with the steel pad, and the force transmission press rods are connected with the steel pad by ball hinging; the ball tray is disposed between the steel pad and the press plates, each press plate has a pressure application face, a pressure bearing face and four sides, the steel pad acts on the pressure bearing faces of the press plates under the action of the ball tray, the pressure application faces of the four press plates are in contact with four surfaces of a rectangular test piece respectively, and the four surfaces refer to two groups of opposite surfaces of the rectangular test piece; bidirectional loading test can be achieved for the rectangular rock mass test piece at the premise of not affecting normal service performance of a shear tester.

Description

technical field [0001] The invention relates to a rock test equipment, in particular to a device for bidirectional loading test of rectangular rock blocks. Background technique [0002] Since the beginning of the 21st century, with the continuous development of the social economy, the state has continued to increase investment in infrastructure construction, and the development of underground space has gradually moved deeper, especially the strong promotion of the western development strategy. The mechanical problems of deep rock encountered in transportation, underground petroleum storage, nuclear waste disposal and other projects are becoming more and more prominent, and the mechanical indicators obtained based on uniaxial compression tests can no longer characterize the mechanical properties of deep buried rock mass. Therefore, the study of rock materials The mechanical properties and failure laws under the action of two-way or three-way stress have great practical signif...

AI Technical Summary

Problems solved by technology

However, limited by the high price and maintenance cost of true triaxial testing machines, most domestic rock mass engineering research institutions are still only equipped with relatively low-cost uniaxial compression and structural plane shear tests that can serve basic teaching purposes. machine, which greatly restricts the progress of experimental research on the mechanical properties of rock materials acting in two or three directions.

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