supported by the National Science Fund for Distinguished Young Scholars of China(51125037);the National Key Basic Research Program(973 Program) of China(2011CB013501);the National Natural Science Foundation of China(51279135 and 51079111);the Doctoral Scientifc Fund Project of the Ministry of Education of China(20110141110026)
A protective layer(PL) is commonly reserved above foundation surface to protect the underlying rock mass during dam foundation excavation. In China, the PL of dam foundation is conventionally subdivided into two or th...