福州市永泰旗山滑坡特征及治理工程设计

摘要

Qishan landslide in Yongtai County is one of deep medium-sized rock landslides rare in Fujian Province.May 18,2012 heavy rainfall induced landslide,tension fracture de-veloped in the trailing edge of landslide,and the leading edge occurred spalling ,falling block,bulging,small landsliding,the landslide appeared obvious sliding signs.Taking e-mergency measures to unload 1 10,000 m3 ,played an important role in the stability of the landslide.To completely eliminate landslide hazards,the landslide has been carried out a de-tailed survey,monitoring and construction design.Based on the deformation activities char-acteristics of Qishan landslide,a comprehensive treatment plan was used that included pres-tressed anchor anti-slide pile retaining,unloading joint slope protection,micropile partial re-inforcement and integrated drainage (surface and underground).This paper provide a refer-ence case for prevention of correlated type landslides in Fujian Province.%永泰旗山滑坡是福建省少见的深层中型岩质滑坡之一,2010年“5.18”强降雨诱发,滑坡中后缘拉张裂缝发育,前缘出现剥落、掉块、鼓胀、小滑坡,出现较明显的滑动征兆,采取应急卸方减载11×104 m3,对滑坡稳定性起了重要作用。为彻底消除滑坡隐患,对滑坡进行了详细勘察、监测以及施工图设计。文章基于旗山滑坡变形活动特征,采用抗滑桩联合预应力锚索支挡+削坡减载联合坡面防护+微型桩局部加固+截排水(地表及地下)综合治理方案,为福建省相关类型滑坡防治提供参考案例。