8CLOUGH G W, HANSEN L A. Clay anisotropy and braced wall behavior[J]. Journal of Geotechnical Engineering, ASCE, 1981, 107:893 - 913.
9OU C Y, CHIOU D C, WU T S. Three-dimensional finite element analysis of deep excavations[J]. Journal of Geotechnical Engineering, ASCE, 1996, 122(5): 337- 345.