子结构法在预应力锚索抗滑桩中的应用

Application of Substructure Method in Anti-Slide Pile with Prestressed Cable

在现有预应力锚索抗滑桩一般计算假定的基础上 ,根据结构矩阵分析理论 ,将滑动面以下桩身视为子结构 ,导出其出口刚度矩阵 ,并作为滑动面以上桩身的边界条件 ,对滑动面以上部分进行平面杆系分析。考虑了桩、土、锚索的共同作用 ,并可根据不同的荷载情况对锚索拉力进行调整 ,从而对桩身内力进行优化 ,保证桩身长期受力的合理性。

On the basis of the existing methods for computing the anti-slide pile with prestressed cable,we regard the pile below the slip surface as the substructure and deduce the stiffness matrix by using of the theory of structural matrix analysis. The stiffness matrix is treated as the boundary condition of the pile above the slip surface. Then the analysis on plane system of beams for the pile above the slip surface is made. Accordingly,the cable,anti-slide pile,and rock-soil surrounding the pile below the slip surface are regarded as a whole,therefore the prestressing force of prestressed cable can be adapted based on different load condition so as to guarantee rationalization of anti-slide pile supporting long-time load.