1. Professor, School of Civil Engineering, Hubei Polytechnic Univ., Huangshi 435003, China (corresponding author).
2. Professor, School of Civil Engineering, Hubei Polytechnic Univ., Huangshi 435003, China.
3. Graduate Research Assistant, School of Civil Engineering, Hubei Polytechnic Univ., Huangshi 435003, China.
4. Professor, Institute of Geotechnical and Underground Engineering, Huazhong Univ. of Science and Technology, Wuhan 430074, China.
5. Professor, Dept. of Civil Engineering, Tsinghua Univ., Beijing 100084, China.
6. Associate Professor, School of Civil Engineering, Hubei Polytechnic Univ., Huangshi 435003, China.