1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai Univ., Nanjing 210098, CN
2. Institute of Tunnel and Urban Railway Engineering, Hohai Univ., Nanjing 210098, CN
3. State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining & Technology, Xuzhou 221000, CN.
4. Research Center of Geotechnical and Structural Engineering, Shandong Univ., Jinan 250061, CN.