A Prefabrication Method of Standard Roughness Joint Surface of Quasi-rock Specimens

Abstract

The invention relates to a method for prefabricating a joint surface with standard roughness of a rock test piece, which belongs to a rock mechanics test method. In this method, the roughness curve is first input into the CNC flame cutting machine, and the stainless steel plate is cut to obtain standard joint surface templates with different roughness; the rough joint surface is assembled to make a mold, and the joint surface template corresponding to the roughness is selected, and according to the prefabricated joint surface Adjust the spacing of the standard joint template according to the opening of the surface; then fill the processing tank with the liquid replica material, remove the mold after cooling and forming, and cut to obtain the required joint sheet of the replica material; fix the joint sheet on the predetermined part of the sample processing mold position and inject the fluid rock-like material into the mold; after forming, demould and heat the rock-like specimen at high temperature to melt and flow out the joint sheet to obtain a rock-like specimen with a joint surface of a specific roughness. This method has the characteristics of simple operation, easy repetition, low cost and high precision, and has broad application prospects in the experimental research of physical and mechanical properties of rock structural surfaces.

Description

technical field [0001] The invention relates to a rock mechanics experiment method, in particular to a method for prefabricating joint surfaces with standard roughness of quasi-rock test pieces. Background technique [0002] In the field of rock mechanics and engineering, rock mass is recognized by relevant scholars and technicians as consisting of a network of complete rock blocks and joints (cracks, structural planes, weak planes or discontinuous planes). The physical and mechanical properties of joint surfaces are the key factors controlling the bearing capacity, permeability properties and stability of surrounding rock in engineering rock mass, and have been closely concerned by relevant researchers. Joint surfaces are generally rough. In 1976, N.Barton systematically analyzed the undulation roughness of 136 joint surfaces, divided the roughness of all joint surfaces into 10 grades, and gave 10 typical roughness profiles. The lengths are all 100mm, and the joint roughne...

AI Technical Summary

Problems solved by technology

However, the existing rough joint surface production methods need to use methods such as laser scanning of the sample surface and 3D printing technology, which have the disadvantages of high requirements for equipment, complicated production process, high cost, and unfavorable popularization. Even if the patent replicates the natural joint surface, it is impossible to prefabricate the joint surface with 10 standard roughness

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