1. Dept. of Geotechnical Engineering, Tongji Univ., Shanghai 200092, China; formerly, College of Civil Engineering, Zhejiang Univ., Hangzhou 310027, China.
2. Professor, Dept. of Civil Engineering, Zhejiang Univ., Hangzhou 310027, China.
3. Professor, China Institute of Water Resources and Hydropower Research, Beijing 100044, China.
4. Senior Engineer, China Institute of Water Resources and Hydropower Research, Beijing 100044, China.