【摘要】 以甘肃省永靖县黑方台黄土滑坡为依托,对黄土滑坡的分布特征和形成因素进行了分析,得出降雨入渗和灌溉是滑坡最主要的滑动原因.对地震作用下滑坡的稳定性采用了强度折减法和简化毕肖普法进行了分析计算.计算结果表明:该滑坡在采取工程加固措施整治前,在地震作用下处于不稳定状态,需进行整治,结合工程地质条件,提出采用排水和抗滑桩的整治方案,并计算得出在地震作用下整治后的滑坡安全稳定系数大于设计值.研究结论可为地震作用下黄土滑坡的稳定性分析提供参考和理论依据.更多还原

【Abstract】 The distribution features and the direct and remote causes are analyzed for the earthequake-induced loess landslides in Heifangtai,Yongjing County,Gansu,China.Agricultural irrigation and natural precipitation are considered to be the major causes.A stability analysis is performed by using two pseudo-static methods: finite-element-based strength reduction method and simplified Bishop method.Through the analysis it is concluded that the loess landslides are in an unstable condition under seismic load before treatment and corresponding saftety evaluation and treatment should be implemented to reinforce the landslide without any delay.It is indicated that the reinforced landslides have a safety factor which is greater than the allowable safety factor under seismic load.The results can be references for similar landslide treatment.更多还原