计算锚索抗滑桩变形及内力的一种新方法

New Method for Calculating Deformation and Internal Force of Anchor Anti-slide Pile

结合结构力学和弹性地基梁理论,考虑锚索的弹性变形,建立了一种计算锚索抗滑桩变形及内力的新方法。在建立公式时,将抗滑桩从滑面处分为上、下两部分;对嵌固段的桩按弹性地基梁计算,滑面以上的桩用力法计算;利用滑面处的变形协调条件,建立了锚索抗滑桩的计算公式,所得公式可以方便地用于求解锚索的设计拉力、抗滑桩的内力及变形。最后,以某滑坡治理工程为例,计算了锚索拉力及抗滑桩的内力,验证了计算方法的可靠性,并与普通抗滑桩的计算结果进行了对比分析。

Combined with structural mechanics and elastic foundation beam theory, a new mechanics calculation model of anchor anti-slide pile was established considering the elastic deformation of anchor cable. In deducing the formula, the anti-slide pile was divided into top and bottom segments from the sliding surface. The bottom segment, which was embedded in the slip bed, was calculated as a elastic foundation beam, and the top section was calculated by force method. Using the deformation compatibility condition of pile section on the sliding surface, the calculation formula of anchor pile was established, and the formula was very convenient to solve anchor cable tension force, anti-slide pile internal force and deformation of the body. Finally, taking a landslide control project as an example, the anchor cable tension and pile internal force were calculated, the reliability of the method was verified, and the result was compared with that of ordinary anti-slide pile.