Device and method for monitoring stress and particle density of fractured rock mass in tunnel engineering

Abstract

The invention relates to a stress and particle density monitoring device and method for a fissure rock mass in tunnel engineering, and belongs to the technical field of underground engineering of fissure rock mass. It includes a circular plate, the lower side wall of the circular plate is fixedly assembled with a cylindrical cylinder, the bottom of the cylindrical cylinder is open and an annular cavity is opened inside, the inner side wall of the annular cavity is filled with foam boards at intervals, and a strain gauge is fixedly installed between two adjacent foam boards. , the lower side wall of the cylindrical cylinder is evenly fixed with bumps, the middle of the upper end of the circular plate is fixedly installed with a connecting rod, the connecting rod is connected with the external electric drill, the upper end of the circular plate is fixed with a joint, one end of the joint is electrically connected with the strain gauge, and the other end is electrically connected. Connect to an external monitoring device. Through the structure of the circular plate, the cylindrical tube, the annular cavity, the strain gauge, the convex block and the connecting rod, the present invention can use the stress relief method for stress detection when the device is drilled into the rock, and when the device is taken out from the rock Part of the rock is also taken out for density measurements.

Description

technical field [0001] The invention relates to a stress and particle density monitoring device and method for a tunnel engineering fissure rock mass, belonging to the technical field of fissure rock mass underground engineering. Background technique [0002] In the underground engineering of fractured rock mass, for the sake of safety and smooth progress of the project, stress detection and density measurement will be carried out on the surrounding and external rock soil parts of the underground engineering, and the commonly used method for stress detection is the stress relief method, and the density The measurement requires soil or rock sampling, but the existing detection equipment cannot complete the two detection tasks at the same time, and it is difficult to repair and replace the strain gauges used in the stress relief method, which will bring certain problems to the detection work. If it is convenient to design a device that is convenient for stress detection and de...

AI Technical Summary

Problems solved by technology

[0002] In the underground engineering of fractured rock mass, for the sake of safety and smooth progress of the project, stress detection and density measurement will be carried out on the surrounding and external rock soil parts of the underground engineering, and the commonly used method for stress detection is the stress relief method, and the density The measurement requires soil or rock sampling, but the existing detection equipment cannot complete the two detection tasks at the same time, and it is difficult to repair and replace the strain gauges used in the stress relief method, which will bring certain problems to the detection work. If it is possible to design a device that is convenient for stress detection and density measurement, and for the maintenance and replacement of strain gauges, this kind of problem can be solved. For this reason, the present invention proposes the surrounding and external stress and external stress of cracked rock mass underground engineering. Particle density monitoring device and method

Images