1. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, 1239 Siping Rd., Yangpu, Shanghai 200092, China
2. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, 1239 Siping Rd., Yangpu, Shanghai 200092, China (Corresponding author), e-mail: zhangrui724@tongji.edu.cn, http://orcid.org/0000-0001-6832-3349