桩锚结构预应力的变形协调确定方法

目前，对于如何确定桩锚结构锚索预应力并没有统一的理论，通过对现有的预应力锚索抗滑桩设计中确定锚索预应力值的各种方法的分析研究，提出了一种确定预应力的方法，即把锚索、抗滑桩与周围的岩土体作为一个整体，根据长期作用荷载找出使桩身受力较为合理情况下的锚索总拉力，即桩身正负弯矩基本相等时锚索上的拉力，充分考虑桩锚协调变形条件进行锚索预应力的计算，并以某高速公路互通区一滑坡为例，与其他方法进行对比分析，证明所提出的方法在桩身受力方面更为合理，能更好地发挥桩锚结构体系的作用。

A compatible distortion method of cable in structure of pile-anchor

There is no a unified theory till now to compute the prestressed force of the cable. A new method for computing the prestress force is put forward by analyzing the existing methods for computing the cable prestressed force in design of anti-slide pile with prestressed cable. The cable, anti-slide pile, and the rock-soil surrounding the pile are regarded as a whole. Firstly, the total force can be got in the cable according the long-term load when the moments on the both side of the pile are equality; then to compute the prestressed force on the condition of compatible distortion. And comparing with others method in a landslide which crossed with a highway; the new method can make the force in the pile better. So the structure of pile-anchor can do better in protected system.