中文摘要：

2015年4月25日尼泊尔发生Ms 8.1级强震,震中距离中国西藏聂拉木地区约120km,但地震诱发该地区发生大量斜坡地质灾害,并导致交通阻断、人员伤亡及财产损失。震后应急调查显示地震诱发樟木地区以崩塌、滑坡及路基沉降等地质灾害为主,并导致樟木镇福利院滑坡局部震裂变形及邦村东滑坡震裂滑动,统计显示纵向上地质灾害分布距河床高差100~300m范围,空间上从樟木口岸-樟木镇-康山桥-聂拉木地震地质灾害发育密度逐渐减少。综合因素分析表明发震断层的“上盘效应”是导致樟木震害较严重的宏观背景,而其它断裂的“隔震效应”使得震动效应迅速衰减。此外,地形、高程及结构面是导致岩质斜坡动力破坏的主要影响因素,而堆积层变形破坏受控于其密实度及地下水富集特征。

英文摘要：

April 25, 2015 Ms 8. 1 earthquake occurred in Nepal, The epicenter was about 120 km from Tibet Nyalam, but this earthquake triggered large number of geological hazards, which led to traffic blocking, casualties and losses of property. After the earthquake emergency investigation showed that the main geological hazards in Zhangmu area were the collapse, landslide and roadbed subsidence, and the earthquake led the party shattering deformation of Zhangmu Welfare landslide and the shatter slip of Bang village landslide. Statistics show that the vertical distribution of geological hazards from the riverbed elevation range of 100-300m, Spatially from Zhangmu town to Kang Shan bridge to Nielamu, the density of seismic geological hazards decreased gradually. Comprehensive factor analysis showed that the ＂hanging wall effect＂ of seismogenic fault was the macro background of the serious damage in Zhangmu area, and the other fault made seismic ground motion attenuation so quickly. In addition, the topographic, elevation and rock structure were the main factors leading to rock slope dynamic failure. And the accumulation layer deformation and failure was controlled by degree of material density and the characteristics of groundwater enrichment.