**Author details**

Zhongzhi Fu<sup>1</sup> \*, Shengshui Chen<sup>1</sup> and Enyue Ji<sup>2</sup>

\*Address all correspondence to: fu\_zhongzhi@yahoo.com

1 Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing, P. R. China

2 Key Laboratory of Failure Mechanism and Safety Control Techniques of Earth-Rock Dams, Ministry of Water Resource, Nanjing, P. R. China
