Shear test method for oversized anchorage structural surfaces

Abstract

A shear test method for super-large anchorage structural surfaces, comprising the following steps: (1) making a plurality of cement-based samples containing anchor rods according to the principle of indoor sample similarity ratio, the samples are cubes containing bosses, and the side bosses are They are respectively rectangular, and the rectangular bosses are square; (2) insert anchor rods during the sample preparation process, and arrange high temperature and high pressure multifunctional fiber grating sensors at the same time; (3) combine the samples into series-sized multi-block samples; (4) Prepare a shear test loading module that matches the series of super-sized samples; (5) Use the monitored stress, strain, displacement and acoustic emission information to judge the stress of the boss; (6) Repeat steps (1 )—(5) That is, the shear test design of the super-large anchorage structure surface with triangular bosses is carried out. The invention improves the matching, rationality and scientificity of the test results, and can solve the difficulty in installing super-large samples, and reduces the safety hazard in the shearing test process.

Description

technical field [0001] The invention belongs to the technical field of indoor physical and mechanical tests, and in particular relates to a shear test method for super-large anchorage structural surfaces. Background technique [0002] Rock slope is closely related to human living environment and geological engineering activities, and it is one of the most basic and extremely important natural geological environments. With the rapid growth of population and the overexploitation of land resources, the slope problem has become one of the three major global geological disasters (sources) alongside earthquakes and volcanoes. In the process of human development, it conflicts, influences and coordinates with it all the time, and then achieves interdependence. Some rock slopes become permanent "artificial natural signs" after undergoing the process from unstable state to stable state. , integrated into the geological environment. With the construction of a large number of national...

AI Technical Summary

Problems solved by technology

Some scholars have proposed a full-scale shear test. The length of the structural surface reaches several meters or even tens of meters, the number of anchor rods required reaches dozens, and the shear force reaches thousands of tons. This is a super-large-scale shear test. Larger stress concentration often occurs at the force point, resulting in the diameter of the sample being crushed

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