Abstract： Using the solid cylinder mechanical model for gravel piles and the cylindrical cavity expansion model for surrounding soil,and considering the pile-soil stress transfer and deformation compatibility conditions,the bearing performances of the gravel pile composite foundation are analyzed based on the triple-shear unified failure criterion.The pile-soil stress ratio,the ultimate bearing capacities of the single pile and the composite foundation were derived.Example showed that the pile-soil stress ratio decreased with the increasing replacement ratio and the increasing deformation modulus of the soil surrounding.The ultimate bearing capacities of the single pile and the composite foundation increased with the increasing principal stress effective parameter b in the triple-shear unified failure criterion.In addition,the consistence between the calculated results and the experimental data also showed that the method proposed in this paper has certain rationality.
胡小荣;樊晓梅. 三剪统一强度准则在碎石桩复合地基承载特性分析中的应用[J]. 南昌大学学报（工科版）, 2012, 34(01): 22-27.
HU Xiao-rong1,FAN Xiao-mei2. Application of the Triple-shear Unified Failure Criterion to the Bearing Performances of the Gravel Pile Composite Foundation. , 2012, 34(01): 22-27.
2012, Vol. 34 
