大型厚层滑坡多锚点预应力锚索抗滑桩的优化设计

The Optimum Method of Prestressed Anchor-wire Anti-slide Pile with Multi-anchored Points in Large-scale Thick Landslide

提出在原锚索桩桩身设置多锚点预应力锚索抗滑桩的新结构形式,并利用有限元方法进行分析计算,提出了寻求最佳锚点位置和锚索承担滑坡推力最佳拉力取值范围的优化方法;通过工程造价比较,得出当锚索拉力系数m值在22%～42%时,锚索抗滑桩总造价较低且趋于稳定,锚索与抗滑桩受力达到最佳协调状态。在同等滑坡推力作用下,多锚点预应力锚索抗滑桩相比其他抗滑桩形式明显降低工程造价。

Structure of prestressed anchor-wire anti-slide pile with multi-anchored points set up in primary anchored pile is proposed.Based on FEM,the authors put forward optimum method for searching the best anchor point position and tension value range of landslide thrust beard by anchor.By comparison,the total cost is tended to be stable and the forced state of anchor and anti-slide pile is the best when anchor tension coefficient is at 20% ～ 42%.At the equal landslide thrust,prestressed anchor-wire anti-slide pile with multi-anchored points has obvious economic benefits.