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

Abstract

The invention discloses a method for identifying and determining non-penetrating structural surfaces of engineering rock mass. The steps are as follows: using 3GSM digital camera measurement technology and borehole camera technology to investigate the structural surface information of the construction site; taking one structural surface among all structural surfaces as Based on the basic data, identify whether the remaining structural surfaces form non-through structural surfaces with them; and so on, until all non-through structural surfaces are identified, and then eliminate duplicate non-through structural surfaces; calculate their penetration coefficients, and find non-through-through structural surfaces with penetration coefficients less than 1. Structural planes; calculate the penetration strength of all non-penetration structural planes with a penetration coefficient less than 1, find the group of structural planes whose penetration strength is smaller than the actual strength and have the smallest value, and consider them as connected structural planes; establish based on the results of analysis and processing Three-dimensional visual block analysis model of engineering rock mass. This invention uses block theory analysis based on the rock bridge penetration criterion to search for key blocks that may slip in the project more accurately and comprehensively.

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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