Surrounding rock engineering geology fine classification method in hydropower project
An engineering geological and refined technology, applied in the field of engineering geological survey, can solve problems such as large range of scoring values, scoring differences, and affecting the determination of surrounding rock categories, and achieve investment and progress control, accuracy improvement, and high practical value. Effect
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[0023] The refined classification method of surrounding rock engineering geology in hydroelectric power projects, including rock strength refinement score, rock mass integrity refinement score, and groundwater state refinement score.
[0024] The detailed scoring of rock strength is based on the lithology in the engineering area, combined with the on-site hammering method, the shape of the cavern excavation, the residual porosity, and the water sensitivity of the rock mass. It conforms to specifications and has strong operability, as shown in Table 4.
[0025] The detailed score table for the completeness of the rock mass comprehensively considers the structure of the rock mass, the number of structural groups in the rock mass and the angle between it and the axis of the cave, the development of weak interlayers, the formation of caverns and the residual porosity, etc. The factors affecting the integrity of the rock mass are shown in Table 5.
[0026] The detailed scoring of the gro...
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