1950 was admitted to the Department of Water Conservancy of Jiaotong University (now an Jiaotong University), 1952 was transferred to East China Institute of Water Conservancy (now Hohai University), 1953 graduated from East China Institute of Water Conservancy (Hohai University), and was assigned to work as a technician in the geotechnical laboratory of Nanjing Institute of Water Conservancy (now Nanjing Institute of Water Conservancy). From 65438 to 0956, he was sent to Moscow Institute of Architecture and Engineering in the Soviet Union, and studied under Professor Cui Tuoqi, an academician of the Soviet Institute of Communication. 1960 received an associate doctorate and returned to China in May. Since then, I have been working in nanjing hydraulic research institute, serving as an engineer, senior engineer, professor-level senior engineer and doctoral supervisor. 1995 was elected as an academician of China Academy of Sciences. Since September 2000, he has been a professor and doctoral supervisor in the Department of Water Resources and Hydropower Engineering in Tsinghua University. In the early years, the static analysis theory of Soviet scholars and the motion analysis theory of American scholars were combined to establish the limit analysis theory of soil and put forward the effective consolidation stress method for the stability analysis of soft soil foundation. After 1970s, he engaged in the research of soil constitutive model and numerical calculation method, put forward new concepts such as multiple yield surface, equivalent stress hardening theory and failure criterion of three shear angles, suggested two new elastic-plastic models, developed effective stress analysis methods and developed six finite element analysis programs, which were widely used in the calculation of large earth-rock dams. In recent years, a new research direction of soil structure model has been opened up, and a new cemented bar element and double spring model based on the concept of damage have been put forward, and my own ideas on establishing the basic framework of modern soil mechanics have been put forward. 1995 was elected as an academician of China Academy of Sciences.