木里县水洛乡东拉滑坡复活机制及稳定性研究

木里县水洛乡东拉滑坡为一老滑坡复活体，成因历史上经历了古滑坡、老滑坡和复活新滑坡。该滑坡剧烈变形约始于2011年，坡体拉裂缝遍布，变形累加遂产生大规模的滑动破坏。通过现场变形特征调查和监测手段，确定了新滑面位于18.5～19.5m处的土体中，滑坡的复活机制在力学模型上为滑移-拉裂破坏。滑坡所处的不良地质环境条件，松散的滑坡堆积物和岩土体结构等是该滑坡变形的地质基础； 人类工程活动的影响是滑坡发生发展的可能潜在主要影响因素。该滑坡目前处于蠕滑变形阶段向剧烈变形失稳破坏过渡，并有向后逐级发展的趋势，滑坡很有可能在降雨等影响下急剧下滑而失稳，将损毁电站公路和东拉大桥，还会将水洛河堵塞，形成堰塞湖，带来更大的危害。

STUDY ON MECHANISM OF REACTIVATION AND ITS STABILITY IN DONGLA LANDSLIDE,SHUILUO TOWN,MULI CITY

Dongla landslide is resurrected in Shuiluo town of Muli city. The causes of the historical experience are ancient landslide, old landslide, resurrecting landslide. Severe deformation of the landslide was since 2011, and tension cracks spread over the landslide, then generate incremental deformation sliding scale destruction. Through deformation characteristics survey and using monitor tools, slip surface is located 18.5～19.5m of the soil. The resurrection of the mechanism of landslides in the mechanical model is the slip-crack destruction. Adverse geological environment, landslide debris and loose rock and soil structure are the base of the landslide geological deformation; impact of human activities are the main factors that may influence the development of potential landslides. The landslide is currently in the stage of creep deformation severe deformation damage, and there is a trend development step by step. Landslide is likely to decline sharply in rainfall, which will destray roads and power plants and the Dongla bridge. The Shuiluo river will be blocked, bring much more damage.