He is currently a member of Tsinghua University Academic Committee and a leader of geotechnical engineering series; Executive Vice President of the Society of Soil Mechanics and Geotechnical Engineering; Director of Hydroelectric Power Society, Director of Geosynthetics Professional Committee; Director of the Deep Foundation; Executive director of China Geosynthetics Association; Vice Chairman of IGS China Committee; Low land technology; Editorial Board of Journal of Geotechnical Engineering, Industrial Building and Foundation Treatment. Main research directions: constitutive relation of soil, dam material of high earth-rock dam, foundation engineering, geosynthetics, etc. Published more than 80 academic papers/kloc-0. Engaged in teaching and scientific research for many years, with rich teaching experience and high teaching level. He has edited five textbooks. Research on Constitutive Relationship of Soil won the third prize of National Natural Science 1987 and the first prize of National Science and Technology Progress 1993 Research on High Earth-rock Dam with Soil Impervious Body. He has won many scientific research awards at the municipal and ministerial levels. As the person in charge of the course, the teaching of Advanced Soil Mechanics won the first prize of excellent teaching achievement in Tsinghua University in 2002; As editor-in-chief, basic engineering won the second prize of 200 1 excellent teaching materials; 1995 won the second prize of excellent teaching achievement; Also won the 1999 and the "mentor" award in 2000. At present, the main vertical scientific research projects in charge are: the National Major Natural Science Foundation Project "Study on Flood Characteristics and Disaster Reduction Methods", the third project (50099620) and the general natural science foundation project "Rock and Soil Yield under Load" (502790 14).