[1
]Professor, School of Earth Sciences and Engineering, Nanjing Univ., 163 Xianlin Rd.,
Nanjing 210093, China (corresponding author).
[2
]Research Scholar, School of Earth Sciences and Engineering, Nanjing Univ., 163 Xianlin
Rd., Nanjing 210093, China.
[3
]Professor, Ecole des Ponts ParisTech, Laboratoire Navier-CERMES, 6 et 8, avenue Blaise
Pascal, Cité Descartes, Champs-sur-Marne, 77455 Marne-la-Vallée Cedex 2, France.
[4
]Professor, School of Earth Sciences and Engineering, Nanjing Univ., 163 Xianlin Rd.,
Nanjing 210093, China.