受侧向土体位移斜桩的特性

通过三维有限单元法分析了斜桩受侧向土体位移的特性。变动柱和土体参数进行敏感性分析,得出桩的柔度、侧向土体位移的大小、桩顶约束条件、土体位移形状和土体移动层厚度等对斜桩的影响。刚性桩的挠度小于柔性桩,但弯矩和剪力大于柔性桩。斜桩非线性弹簧的土抗力—位移关系(p-y曲线)表现为双曲线特征,可基于直桩的Winkler地基反力法对斜桩进行简化计算分析,但应对直桩的极限土抗力值进行修正,以期更好的反映斜桩的特性。

Behavior of Batter Pile Due to Lateral Soil Movement

Three-dimensional finite element analysis has been carried out to evaluate the response of a sin- gle batter pile when subjected to lateral soil movements.Sensitivity studies are also presented through varying soil and pile parameters.The results show that the behavior of the batter pile was significantly in- fluenced by the pile flexibility,the magnitude of soil movement,the boundary conditions of pile head,the profile of the soil movement and the thickness of the moving soil mass.The deflections of the rigid batter pile are less than those of the flexible one,while the bending moment and shear forces of the rigid batter pile are more than the flexible one.The resistance-displacement relationships(p-y curves)of soil for non- linear springs of the batter pile look like the hyperbolic shapes,so the Winkler's method for subgrade can be used to simplify the analysis of the batter pile through modifying the ultimate soil pressures of the verti- cal one to reflect better the behavior of the batter pile.