1. Professor, State Key Laboratory of Hydroscience and Engineering, Tsinghua Univ., Beijing 100084, China; Sanjiangyuan Collaborative Innovation Center, Qinghai Univ., Xi’ning 810016, China.
2. Ph.D. Student, State Key Laboratory of Hydroscience and Engineering, Tsinghua Univ., Beijing 100084, China.
3. Researcher, Institut für Geotechnik, Univ. für Bodenkultur, Feistmantelstrasse 4, A-1180 Vienna, Austria (corresponding author).
4. Engineer, Beijing Rail and Transit Design & Research Institute Co. Ltd., Beijing 100068, China.
5. Professor, State Key Laboratory of Hydroscience and Engineering, Tsinghua Univ., Beijing 100084, China.