施工技术 2011年1月 98 CONSTRUCTION TECHNOLOGY 第40卷第1期 大型厚层滑坡多锚点预应力锚索抗滑桩的优化设计 楚小刚，王引生 (中铁西北科学研究院有限公司，甘肃兰州730000) [摘要]提出在原错索柱桩身设置多错点预应力锚索抗滑柱的新结构形式，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错素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，错索与抗滑柱受力达到最佳协调状态.在同等滑坡 推力作用下，多锚点预应力错索抗滑柱相比其他抗滑桩形式明显降低工程造价. [关键词]大型厚层滑坡；结构优化；多锚点预应力锚索抗滑桩 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2011)01-0098-03 The Optimum Method of Prestressed Anchor-wire Anti-slide Pile with Multi-anchored Points in Large-scale Thick Landslide Chu Xiaogang Wang Yinsheng (Northwest Research Institute Co.Lad.of C.R.E.C.Lanzhou Gansu 730000 China) Abstract: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 parison the total cost is tended to be stable and the foreed 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. Key words:large-scale thick landslide;structure optimum;prestressed anchor-wire anti-slide pile with multi-anchored points 预应力错索抗滑桩是抗滑桩和锚索形成联合受佳取值范围. 力体系，当锚索与桩同时达到承受的最大设计内力1锚索拉力系数m 时，才能最大程度发挥锚索及抗滑柱的作用，造价也 锚索拉力系数m是铺索拉力水平分力与桩需 最为节省.若施加在桩上的铺索拉力太小，错索不 抵抗滑坡水平推力的比值，可表达为： 能有效地抑制桩的变位，锚点不能起到“支点”作 m=(Fncosa)/(KE S)(1) 用，使预...
大型厚层滑坡多锚点预应力锚索抗滑桩的优化设计.pdf
