【摘要】 "5.12"汶川地震后,面积13余万km2山地的河谷或山谷斜坡区内[5],形成了大量的沉积物流堆积体、崩塌、滑坡、泥石流等次生灾害地质体。地震波效应后的斜坡松散岩土体及灾害地质体,在降雨、外力等作用下,稳定性迅速降低。地质灾害防治是一项困难、复杂的系统工程,全面系统地分析灾害地质体所处地质环境、变形历史、现状变形特征及演化趋势规律,防灾、减灾的对策措施才能有的放矢。更多还原

【Abstract】 After "5.12" Wenchuan earthquake,large amount of sediment accumulation,collapse,landslide,mud-rock flows of secondary disasters are formed in 130 thousand km2 mountainous slopes of the valley or the valley sloppy area.The slopes stability of loose rock and soil and hazardous geological body rapidly reduces after seismic wave effects under the rainfall or external forces.Geological hazards precautionary countermeasures are difficult and complex systems engineering,as long as systematically analyses the geological environment,deformation history and deformation characteristics of the status quo and law of evolution trends,the countermeasures of protection and reducing the hazards could be effectively implemented.更多还原