Abstract：Research purposes:Micro － pile construction has been widely used in the reinforcement in the mountains slope ( landslide) with the feature of simple，rapid construction，layout flexibility and strong skid resistance． Based on the failure examples of steel pipe micro － pile reinforcement slope，using finite element method to research the limit sliding resistance of steel pipe micro － pile through back analysis．
Research conclusions:This study showed that，for the steel pipe micro － pile that using pile － cap － beam combined structure，the landslide － thrust distribution back of the pile is big in the end and small in the middle performance " U" type distribution form; Soil resistance before the pile is big top and small bottom performance inverted triangular distribution． Limit sliding resistance of steel pipe micro － pile composite structures ( four row of steel pipe pile + contact beam) is 596 kN，single steel pipe micro － pile average limit sliding resistance for 149 kN． In practical projects，these engineering measures can be used to improve the anti － sliding ability of steel pipe micro － pile such as modify between pile soil，setting support structure before pile，optimize structure distribution form，and so on．
Wang Gongxian． The Domestic and International Situation of the Landslide Measures ［J］． Chinese Journal of Geological Hazard and Control，1998 (1) : 1－9．
［3］ 陈德中． 岩质高边坡综合治理施工技术［J］．铁道工程学报，2004(3) :85－88．
Chen Dezhong． Constructon Technique for Treatment of High Rock Side － Slope［J］． Journal of Railway Engineering Society，2004(3) : 85－88．
Ma Huimin，Wu Honggang． Practices on High Slope Disease Control of Highways in Mountainous Area［J］． Journal of Railway Engineering Society，2011(7) : 34－ 41．
Lu Fanren，Chen Yunmin，Mei Yingbao． Small Pile of Research the Status Quo and Prospects［J］．Industrial Buildings，2003(4) : 56－59．
［6］ Bruce D A，Dimillio A F，Juran I． Introduction to Micropiles: an International Perspective ［C ］/ /In: William F K ed． Foundation Upgrading and Repair for Infrastructure Improvement． New York: Geotechnical Special Publication，ASCE，1995．
Yan Jinkai，Yin Yueping，Men Yuming． Micro Pile Reinforcement Landslide Model Test ［J］． Journal of Engineering Geology，2009 (5) : 669－674．
［8］ Andrew Z Boeckmann． Load Transfer in Micro －piles for Slope Stabilization from Test of Large － scale Physical Models ［D］． Columbia: University of Missouri － Columbia，2006．
2012, Vol. 29 
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