Surrounding rock engineering geology fine classification method in hydropower project

Abstract

The invention discloses a surrounding rock engineering geology fine classification method in a hydropower project and relates to the technical field of engineering geological survey. The problem thatthe score range of partial grading factors of an existing hydropower surrounding rock classification HC method is large, the score difference of different geological engineers based on the score rangeis obvious and the classification determination of a surrounding rock is affected is solved. The technical scheme employed by the invention is that the method comprises rock strength refined grading,rock mass integrity refined grading and groundwater state refined grading. The method is based on 'engineering geological investigation specification for medium-small hydropower projects', combined with actual geological conditions on a site and a result obtained by an on-site investigation method, the evaluation is carried out, a scoring standard that is suitable for engineering practice is made, the accuracy of the classification of surrounding rock types in related projects is effectively improved, the influence of human factors is reduced, so the classification of tunnel surrounding rocksis more in line with an actual situation, the operability is high, and the method has a high practical value and a large economic benefit.

Description

technical field [0001] The invention relates to the technical field of engineering geological survey, in particular to a refined classification method for surrounding rock types in hydroelectric power generation projects. Background technique [0002] At present, in hydropower projects, most of the engineering geological classifications of surrounding rocks are based on "Code for Geological Survey of Small and Medium-sized Hydropower Engineering" (DL / T5410-2009) and "Code for Geological Survey of Hydropower Engineering" (GB 50287-2016). HC method for classification of surrounding rocks required for hydropower. The HC method takes rock strength, rock mass integrity, and structural plane status as basic factors, groundwater and main structural plane occurrences as correction factors, the cumulative scores of basic factors and correction factors as basic criteria, and surrounding rock strength-stress ratio The classification of surrounding rocks is carried out for the limited ...

AI Technical Summary

Problems solved by technology

[0012] The present invention provides a refined classification method for surrounding rock engineering geology in hydropower engineering, which solves the problem that the scoring value range of some scoring factors of the existing hydropower surrounding rock classification HC method is large, and different geological engineers have obvious scoring differences based on this, which affects the surrounding rock category. Judgment question

Images