The in-situ seepage test and in-situ large direct shear test are made combining with the in-situ rolling test for the core wall of 260 m high dam in Nuozhadu Hydropower Station,the impervious material of which is weathered material or gravel weathered material.

With the grain sizes of weathered material reduced by the method of similar grading,experimental study of its physico-mechanical properties is carried out,and by the dry-wet circulation,further weathering of weathered material is simulated for experiment comparison analysis.

Introduces the study on the property of weathering material and presents control requirements on the experiment of design parameters.

Application of detonating method for leading blast pipe in cave blast in wind erosion material yard;

Through the analysis of the geological characteristics of weathered soil material,the essay presented the problems that the weathered soil site exploration should be pay attention to,selected the appropriate exploration methods,and made recommendations about the analysis and evaluation of the quality and storage capacity of weathered soil material.