Identification and Determination Method of Non-penetrating Structural Surface of Engineering Rock Mass

Abstract

The invention discloses an engineering rock mass non-through structural plane identifying and determining method which includes the following steps: 1), surveying structural plane information of a construction site by utilization of the third generation global system for mobile communications (3GSM) digital photographing measurement technology and borehole photographing technology; 2), identifying all non-through structural planes, and computing the through coefficients of the non-through structural planes to find out non-through structural planes with the through coefficients smaller than 1; 3), computing the through strength of all the non-through structural planes with the through coefficients smaller than 1, finding out a group of structural planes with the through strength smaller than actual strength and smallest, and considering the group of the structural planes as interconnected structural planes; 4), repeating the step 2) and the step 3) until the analysis on all the non-through structural planes is accomplished; and 5), establishing an engineering rock mass three-dimensional (3D) visualization block analysis model according to results of the analysis processing. According to the engineering rock mass non-through structural plane identifying and determining method, key blocks that may slip off can be analyzed and searched out more precisely and comprehensively in a project by utilization of the block theory based on the rock bridge through standards.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering in civil engineering, and relates to a method for identifying non-penetrating structural surfaces of engineering rock mass and determining the same. Background technique [0002] Rock mass is not homogeneous, but a heterogeneous anisotropic and discontinuous composite structure composed of many sliding surfaces, cracks, joints, weak surfaces, interlayers, and faults (collectively referred to as structural planes). Structural planes can be divided into penetrating structural planes and non-penetrating (intermittent) structural planes according to whether they are connected or not. If a group of structural planes is continuous and runs through the entire rock mass, which is the boundary of the rock mass and rock block, the structural plane is called a through structural plane; When the rock is not completely separated, the group of structural planes is called non-penetrating struct...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is that the present invention aims at the problem that the key blocks that cannot be searched out due to the penetration of rock bridges in the current theoretical research on blocks, and proposes a method for identifying non-penetrating structural planes of engineering rock mass and its determination method, and fully Considering the effects of rock bridge inclination angle, structural surface friction coefficient, surrounding rock pressure, connectivity rate and structural surface inclination angle on the expansion and penetration behavior of non-penetrating structural surfaces, a criterion for judging whether non-penetrating structural surfaces should be connected in 3D network simulation is given

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