COMPREHENSIVE ASSESSMENT OF ENGINEERING GEOLOGICAL ENVIRONMENT IN HYDROELECTRIC DEVELOPMENT ZONE, JINSHAJIANG RIVER

The intersection between Sichuan and Yunnan Provinces through which flows the Jinshajiang River, is a typical active tectonic zone in southwestern China. In this intersection zone, occur strong neotectonic activities accompanied by various endogenic and ectodynamic geological hazards. In this case, the engineering geological environmental system in this region should be evaluated in the planning of the Jinshajiang hydroelectrical gradient project. In this paper, nine factors closely related to the engineering geological environment are chosen to establish a hierarchical analysis model in terms of crust stability, ground stability, and rock and soil mass stability. The factor weighing values obtained from the hierarchical analysis are used to make a comprehensive assessment and zoning of the engineering geological environment quality in the following five categories: poor, relatively poor, normal, relatively good, and good. The zoning of the engineering geological environment indicates that some important engineering geological problems are present in the site selection regions for different gradient engineering projects.