锚拉式排桩体系设计思路与桩身锚索计算

A Design Idea for Anchorage Type Pile Arrangement System and Calculagion of Anchorage Cable

排桩支护体系中,除需对桩斜截面承载力与正截面受弯承载力进行验算外,尚需根据受支护岩土体周边尤其是坡顶环境考虑桩身容许位移。锚拉式排桩体系不仅能有效控制排桩变形,亦可降低桩身内力、优化桩截面与桩配筋。论文通过工程实例阐述锚拉式排桩体系的受力模式与设计思路,提出体系中锚索受力计算的适宜方法。

In a pile retaining and supporting system, in addition to calculating the bearing capacity of cross section of pile and bending bearing capacity of positive section, we need consider the permissible displacement of pile body according to surrounding environment and especially slope environment of retaining rock and soil. The anchor type pile arrangement system not only effectively control the deformation of the pile, but also reduce the internal force of the pile and optimize pile section and pile reinforcement. This paper expounds the force mode and design idea of the anchor type pile arrangement system according to an engineering example, and propose a suitable method for calculating the force of anchorage cable in this system.