Abstract:

Jinping arch dam is the highest arch dam in the world, and is also the highest dam has been built in the world. It has complex topographic and geological conditions. Methods of determining the shear strength parameters of rockmass are researched by shear tests, test feature point selection, parameter statistics, as well as typical block stability analysis. Research results indicate that the selection of standard value of shear strength parameters varies in different specification requirements in China and abroad. Some feature points on the shear test curve can be determined through the feature points obtained easily. The shear strength parameters of the same project obtained by different methods are different, which may lead to different evaluation results of anti-sliding stability of dam abutment. The research results provide reference for similar engineering.

Key words: Jinping-I arch dam, shear strength parameter, method of determining parameter, abutment stability