Design method of shearing test for size effect of anchored structural plane

Abstract

The invention discloses a design method of a shearing test for the size effect of an anchored structural plane. The design method comprises the following steps that: (1) a concrete specimen is prepared according to an indoor test principle, and the specimen is a cuboid; (2) a direct shearing test is conducted on the specimen through a large direct shearing apparatus, shearing stress and displacement information are monitored in the test process, and the shearing strength of the anchored structure plane is obtained; (3) a functional relationship between the shearing strength and the size is obtained by enlarging the size of the structural plane sequentially; (4) a functional relational expression between the shearing strength and the inter-row spacing is obtained by enlarging the inter-rowspacing of an anchor rod sequentially; (5) a functional relational expression between the shearing strength and the diameter is obtained by enlarging the diameter of the anchor rod sequentially; (6) the three functional relational expressions are analyzed mathematically by using MATLAB software; and (7) anchoring parameters of a high and steep rock slide slope are designed. According to the designmethod, the accuracy and the scientificity of the shearing strength value of the structural plane can be improved, a safety factor of the high and steep rock slide slope is increased, and meanwhile the problem of material waste caused by unreasonable anchorage design is avoided.

Description

technical field [0001] The invention belongs to the technical field of indoor physical and mechanical tests, and relates to a design method for a size effect shear test of a foundation anchorage structure surface. Background technique [0002] In recent decades, with the rapid development of my country's economy, there have been more and more large-scale construction projects, such as hydropower projects, deep resource mining, underground water-sealed oil depots, and nuclear power projects. Because there are often many structural planes in natural rock mass, these projects bring economic benefits and high-quality life, but also have great safety hazards, especially high and steep rock slopes, and landslides have seriously affected people's health. life and property safety. Engineering practice shows that the instability of high and steep rocky slopes is controlled by structural surfaces. When the anti-sliding force of structural surfaces is smaller than its sliding force, l...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the inaccurate, unscientific, and large deviations in obtaining the shear strength of large-scale anchored structural surfaces on-site through indoor small-scale anchored structural surface shear tests in the existing technology, which will lead to safety hazards and waste of materials, The invention provides a design method for the size effect shear test of the anchorage structural surface, which can solve the problem of the size effect of the anchorage structural surface, improve the accuracy and scientificity of the value of the shear strength of the structural surface, and improve the efficiency of high and steep rock edges. The safety factor of the slope is improved, and at the same time, the waste of materials caused by unreasonable anchorage design is avoided

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