Comprehensive structural surface shearing strength evaluation method for rock mass based on mean value function

A technology of shear strength and structural surface, applied in the engineering field, can solve problems such as poor accuracy and achieve the effect of improving accuracy

Active Publication Date: 2016-05-25
SHAOXING UNIVERSITY
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Problems solved by technology

[0005] In order to overcome the shortcomings of the poor accuracy of the existing rock mass structural plane shear strength evaluation method, the present inv...

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  • Comprehensive structural surface shearing strength evaluation method for rock mass based on mean value function
  • Comprehensive structural surface shearing strength evaluation method for rock mass based on mean value function
  • Comprehensive structural surface shearing strength evaluation method for rock mass based on mean value function

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example

[0032] Example: A comprehensive evaluation method for the shear strength of rock mass discontinuities based on the neutrosophic function, the process is as follows:

[0033] First, four representative granite structural planes were measured in the field, and their digital undulation contour curves are shown in 1;

[0034] Secondly, on these representative structural surfaces, the structural surface measurement sections of different sizes are evenly arranged, and the profile curve meter is used to measure, and then the modified straight edge method is used to measure the structural surface roughness coefficient;

[0035] Then, the statistical analysis of the structural surface roughness coefficients under different sizes is carried out, and the distribution law of the minimum and maximum value of the structural surface roughness coefficient is obtained by fitting the exponential function, and the neutrosophic function expression of the structural surface roughness coefficient ca...

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Abstract

The invention discloses a comprehensive structural surface shearing strength evaluation method for a rock mass based on a mean value function. The method comprises the following steps: selecting a structural surface of an engineering rock mass to be analyzed, and judging a potential sliding direction; uniformly distributing structural surface measurement sections in the potential sliding direction; drawing a contour curve of each measurement section with a contour curve instrument; extracting coordinate data on the contour curves with an image processing method, and thereby measuring a structural surface roughness coefficient of each measurement section; performing statistical analysis on the coordinate data of the structural surface under a condition of each size L independently to determine a minimum value and a maximum value of the roughness coefficient; fitting the distribution rule of the maximum values and the minimum values of the roughness coefficients of the structural surface under different size conditions respectively adopting exponential functions to obtain an interval function; combining the interval function of the structural surface shearing strength and an experimental structural surface shearing strength formula of Barton to obtain the mean value function expression of a structural surface shearing strength tao (JRC). According to the method, the accuracy of surface shearing strength evaluation for the rock mass can be effectively improved.

Description

technical field [0001] The present invention relates to a method for evaluating the shear strength of a structural surface of a rock mass, in particular, the neutrosophic function adopted in the present invention can express the uncertainty caused by the non-uniformity of the structural surface surface fluctuation and the size effect on the shear strength of the structural surface , realizing the comprehensive evaluation of the shear strength of the structural plane of the rock mass, and the invention belongs to the technical field of engineering. Background technique [0002] The roughness coefficient of rock mass structure surface has basic characteristics such as heterogeneity, anisotropy, anisotropy and size effect. Under the same lithological conditions, for the same structural plane, there are obvious differences in the roughness coefficients measured at different positions and at different lengths. Before the present invention was made, people quantitatively expresse...

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Application Information

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IPC IPC(8): G01N3/24
CPCG01N3/24G01N2203/0025
Inventor 叶军雍睿杜时贵梁奇峰李博符曦黄曼马成荣
Owner SHAOXING UNIVERSITY
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