1. School of Civil and Environmental Engineering Harbin Institute of TechnologyShenzhen518055China
2. Key Lab. of Ministry of Education for Geomechanics and Embankment Engineering Hohai Univ.Nanjing210098China
3. Geotechnical Engineering Research Center of Jiangsu ProvinceNanjing210098China
4. Dep. of Civil and Environmental EngineeringHong Kong Univ. of Science and TechnologyHong Kong Special Administrative Region