“品”字型抗滑桩治理锁儿头滑坡效果分析

Analysis of Treatment Effect of “Pin” Type of Anti-slide Piles for Suoertou Landslide

"品"字型抗滑桩防治方案用于治理锁儿头滑坡,为评价其治理效果,采用FLAC^(3D)软件进行数值模拟,对比分析采用"品"字型抗滑桩治理滑坡和不采取支挡措施时滑坡体的应力、位移的大小、变化情况。研究表明,采取抗滑桩支挡措施后滑坡整体位移减小,且对坡脚稳定的治理效果较佳;在10m平台以上坡体应力较为集中,在不利荷载情况下可能会发生局部滑塌,为增加安全储备,可采取挡土墙支挡措施处理;"品"字型抗滑桩挡土侧桩受力均匀,前排桩位移明显小于后排桩,为了使抗滑桩受力更加合理,在设计时可采取适当加大前后排桩间距或减小前排桩截面的方式优化。

＂Pin＂type anti-slide pile prevention programs is used to treat Suoertou landslide,for the evaluation of the effect of its governance,by means of the numerical simulation software FLAC^（3D） to compare the stress,displacement of landslide and trends when taking the＂Pin＂type of anti slide piles and no piles.As a result that after the anti slide pile supporting measures,the landslide displacement decreases,and the slopeis stable.The governance effect is marked.The slope stress is concentrated on 10 mplatform and local collapse may occur under the unfavorable load,in order to increase the safety margin,we suggested a retaining wall.The retaining side pile has uniform stress.The front row pile displacement is significantly less than the back row pile in＂Pin＂type of anti slide,so in order to make the anti stress more reasonable,it is appropriate to increase the row pile spacing or reduce the front pile cross section during the design.