【摘要】 "5.12"汶川特大地震破坏性强,影响范围广,在地震区造成了大量的滚石、崩塌、滑坡、泥石流等次生山地灾害。汉源县是汶川8.0级大地震Ⅵ度烈度区内唯一的Ⅷ度异常区,是十分典型的远震烈度异常区,由于地震导致山体松动,因而触发了大量的崩塌、滑坡。以2009年8月6日四川省汉源县顺河乡境内猴子岩发生的大型崩塌滑坡为例,将滑坡划分成起动、运动、撞击3个阶段,根据大渡河堰塞坝的形成过程,运用滑坡几何学、滑坡运动学理论,论述了汉源高位山体崩滑的形成及机理;基于岩质滑坡动力学、能量平衡原理,分析了岩质山体崩塌滑坡的运动规律,并对各阶段的岩体介质速度进行了计算。计算结果表明:猴子岩崩滑全过程中,崩滑体运动速度呈先增大后减小的趋势,行程运动阶段的速度高于起动速度和撞击后速度。研究结果可为水库的设计及涌浪高度的确定提供基本参数,同时为边坡失稳及堰塞湖的防治提供理论依据。更多还原

【Abstract】 Taking the large-scale landslide in Houzi Yan occurred at Hanyuan County on August 6th,2009 as a Sample,the landslide was divided into three stages,which were staring period,movement period and collision peri-od.According to the formation process of barrier dam of Dadu River,using landslide geometry and landslide kine-matic theory,the formation and mechanism of Hanyuan mountain landslide were discussed.Based on dynamic landslide and energy balance principle,the motion law of the rock mountain landslide was analyzed,and the speeds at the various stages were calculated.The results showed that the speed of sliding mass firstly increases and then decreases during full course movements of Houziyan Landslide,movement velocity is higher than the speed at the starting period and after.更多还原