1. Professor, Dept. of Civil Engineering, Zhejiang Univ., Hangzhou 310058, P.R. China; Professor, Dept. of Civil Engineering, Zhejiang Univ. of Technology, Hangzhou 310014, P.R. China.
2. Ph.D. Candidate, Dept. of Civil Engineering, Zhejiang Univ., Hangzhou 310058, P.R. China.
3. Associate Professor, College of Civil Engineering and Architecture, Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation of Zhejiang Province, Wenzhou Univ., Wenzhou 325035, P.R. China (corresponding author).
4. Professor, College of Civil Engineering and Architecture, Wenzhou Univ., Wenzhou 325035, P.R. China.