巴东作揖沱崩滑体基本特征及成因机制分析

:作揖沱崩滑体是三峡工程库区重点勘察研究的崩滑体之一 ,位于湖北省巴东县楠木园乡长江南岸 ,距三峡工程坝址 83km,作揖沱崩滑体东西宽为 5 40～ 72 0 m,南北长为 2 80～ 40 0 m,前缘高程为 2 0 m(水下 ) ,后缘高程为 2 80 m,体积为 413.32万m3。作揖沱崩滑体的组成物质为碎块石夹土 ,块石成分复杂 ,局部还保存有变位岩体。作揖沱崩滑体的形成经历了崩塌、滑移、加载和变形滑动等阶段 ,是一个典型的崩滑复合体。近代以来 ,作揖沱崩滑体曾发生多次变形复活 ,是一个不稳定的崩滑体

ANALYSIS OF THE BASIC FEATURES AND THE MECHANISM OF THE ZUOYITUO LANDSLIDE IN BADONG COUNTY

The Zuoyituo landslide 83 km from the Three Gorges'dam,i s one of the major prospecting landslides in the reservoir area of the Three Gorges,lying on the southern bank of the Changjiang River, in the Nanmuyuan Village of Badong County of Hubei Province.The width from east to west is 540 m to 720 m and the length is 280 m to 400 m.The front edge elevation of the landslide is 20 m (underwater) and the back edge elevates 280 m, whose volume is 413.32×104 m3. The materials are composed of small rocks containing soils and the blocks of composition are very complex with dislocation rock mass deformating in the location. Its formation has undergone rockfalls, slip, load, deformation and slide. It is a typically compound landslide. In recent years, the landslide has deformated many times,and thus an unsteady landslide.