预应力锚索抗滑桩设计中确定锚索预应力值的一种方法

在现有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基础上 ,考虑了预应力锚索抗滑桩在工作期间承受滑坡推力的变化 ,提出将锚索、桩及桩锚固段周围岩土作为一个整体根据长期作用荷载来进行锚索预应力值计算的方法 ,对于短期作用的最危险荷载则在锚索与桩的承载力设计中予以考虑。算例分析表明 ,该方法能使锚索桩长期处于较为有利的受力状态 ,从而提高了其安全余量

A METHOD FOR COMPUTING THE PRESTRESSING FORCE OF THE ANTI-SLIDE PILE WITH PRESTRESSED CABLE

On the base of existing methods for computing the cable s prestressing force in design of anti-slide pile with prestressed cable, we consider the change of horizontal sliding force that acts on the anti-slide pile and suggest a method for computing the prestressing force. In the method, the cable, anti-slide pile, and the rock-soil surrounding the pile below the slip surface are regarded as a whole and the prestressing force should be calculated according to the long-time load, while the effect of the short-time load should be considered in the bearing capacity design of the cable and pile. The computation results show that the method leads the anti-slide pile and the cable to be at an advantageous internal force condition and hence to improve the structure s safety.