A rapid method for determining macroscopic strength parameters of layered rock masses

By conducting uniaxial triaxial compression and shear tests on layered rock masses, combined with equivalent treatment of through joints and fissures, the anisotropy problem of strength parameters of layered rock masses was solved, enabling rapid determination of equivalent macroscopic strength parameters and improving the accuracy of engineering analysis.

CN116305811BActive Publication Date: 2026-05-26INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
Filing Date
2023-02-10
Publication Date
2026-05-26

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Abstract

This application discloses a rapid method for determining the macroscopic strength parameters of layered rock masses. For layered rock masses without discontinuous joints or fractures, the method includes the following steps: S1. Conducting conventional uniaxial triaxial compression tests on matrix rock blocks to obtain the stress-strain curves of the matrix rock blocks, and fitting the peak strength and residual strength of the matrix rock blocks under different confining pressures to obtain the strength parameters of the matrix rock blocks; S2. Conducting shear tests on bedding samples to obtain the stress-strain curves of the bedding surfaces, and fitting the peak strength and residual strength of the bedding surfaces under different normal stresses to obtain the strength parameters of the bedding surfaces; S3. Taking the average of the peak strength of the matrix rock blocks and the peak strength of the bedding surfaces, as well as the average of the residual strength of the matrix rock blocks and the residual strength of the bedding surfaces, to obtain the macroscopic equivalent strength parameters of the layered rock mass without discontinuous joints or fractures.
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