6Focht J A, Koch K J. Rational analysis of the lateral performance of offshore pile groups[ M]. OTC, 1896.
7Brown D A, et al. Lateral load behavior of pile groups in sand[J]. Joum. of Geotech. Engrg, ASCE, 1988, 114(11).
8Valliappan S, Tandjiria V. Design of raft-pile foundation using combined optimization and finite element approach[J]. International journal for Numerical and Analytical Methods in Geomechanics, 1999, 23(10):1043-1065.
9Desai C S, Zaman M M. Thin-layer element for interfaces and joints[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 1984, 8(1): 19-43.
10Desai C S, Youzhi Ma. Modeling of Joints and interfaces using disturbed state concept[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 1992, 16(6): 625-653.
