Accurate value obtaining method for shearing strength of engineering rock mass joint

Abstract

The invention discloses an accurate value obtaining method for the shearing strength of an engineering rock mass joint. The method comprises the following steps that: the engineering rock mass is subjected to engineering geologic zoning to carry out rock mass structure analysis, a potential glide plane which affects the stability of the engineering rock mass is determined, and a potential glide direction is determined on the potential glide plane; a joint outcrop corresponding to the potential glide plane is searched as a JRC (Joint Roughness Coefficient) measurement joint; according to the potential glide plane, survey segments Li are evenly arranged, all survey segments Li are subjected to the directional statistical measurement of the JRC, measurement results are subjected to statistics to obtain a JRC size effect fractal dimension D; and according to the rock mass structure analysis, the joint length Ln of the joint corresponding to the potential glide plane in the glide direction is determined, the JRCn of the sampled LN is calculated, and a JRC-JCS model is model is used for carrying out accurate value obtaining on the shearing strength of an engineering rock mass joint. The method has the advantages of being convenient in operation, low in cost, good in use effects and convenient in realizing the accurate value obtaining method for the shearing strength of the engineering rock mass joint.

Description

technical field [0001] The invention relates to a method for accurately determining the shear strength of an engineering rock mass structural surface, which is suitable for the occasion of accurately measuring the shear strength of an engineering rock mass structural surface according to the accurate measurement of the roughness coefficient (JRC) of the rock mass structural surface in the field. Background technique [0002] At present, there is no accurate method for calculating the shear strength of structural planes of engineering rock mass. The structural plane shear strength of the rock mass in the project has the characteristics of anisotropy, anisotropy, non-uniformity and size effect. The outcrop of the structural plane is selected arbitrarily for JRC measurement, and the shear strength of the structural plane is evaluated according to the JRC-JCS model. Distortion of the value object, replacement of the overall value with individual values, and failure to take value...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the inadequacy of the inability to accurately measure the shear strength of engineering rock mass structural planes in the existing technology, that is, the existing technology cannot accurately measure the shear strength of engineering rock mass structural planes according to the accurate measurement of the roughness coefficient JRC of field rock mass structural planes The present invention provides a method for accurately determining the shear strength of engineering rock mass structural planes, which is convenient to operate, low in cost, good in use effect, and convenient to realize accurate shearing strength of engineering rock mass structural planes

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