THE ANALYSIS AND EVALUATION OF CHARACTERISTIC OF KARST IN DAYANDONG HPP

Karst problem is one of the complex geological engineering problems in Dayandong HPP.This paper mainly introduces the survey and the evaluation method of the karst problem. The appropriate survey and testing methods have been adopted in preliminary design phase. The main karst development situation have been surveyed and the statistic analysis of main characteristics of karst have been done. Through the summary of the characteristics of karst development, we put forward the division standard of karst development for the project. Combined with the engineering characteristics, the effects of dam foundation seepage is analyzed and evaluated.