Surrounding rock grading method based on laser scanning technique

Abstract

The invention discloses a method for grading surrounding rocks based on laser scanning technology, comprising the steps of: scanning the surrounding rocks to obtain three-dimensional space point cloud data and laser echo intensity of the surrounding rocks; The number of rock mass joints and joint spacing are obtained by data calculation to determine the integrity of the rock mass; the uniaxial compressive strength of the rock mass is deduced from the laser echo intensity of the surrounding rock to determine the rock type; according to the determined rock mass integrity degree and rock type, and classify the surrounding rock in combination with the surrounding rock classification standard to obtain the surrounding rock classification grade. The invention can effectively and correctly realize the grading of the surrounding rock of the tunnel, which can be automatically realized through the calculation program, avoids the interference of human factors, can scan the surrounding rock in the whole space, has strong operability, strong anti-interference, high efficiency and convenience, and has wide applicability.

Description

technical field [0001] The invention relates to a surrounding rock classification method based on laser scanning technology, which belongs to the technical field of geotechnical engineering. Background technique [0002] The classification of the surrounding rock of the tunnel is the basis for selecting the construction method and the basis for determining the type and size of the lining structure and determining the structural load. According to the "Technical Regulations for Advanced Geological Prediction of Railway Tunnels", the basic classification of surrounding rock can be determined by the hardness of the rock and the integrity of the rock mass. The hardness of the rock can be determined by the uniaxial saturated compressive strength, and the integrity of the rock can be divided according to the integrity index. The traditional division method is realized based on indoor rock tests, and there are huge defects in test cost and efficiency. [0003] With the developmen...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a method for grading surrounding rock based on laser scanning technology, solve the problem that the traditional division method cannot use three-dimensional laser scanning technology, and there are huge defects in testing cost and efficiency. Correctly and Effectively Realize the Classification of Surrounding Rock of Tunnel

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