金沙江宜宾—白鹤滩段岸坡类型与稳定性

Types of Bank Slope and Its Stability form Yibin to Baihetan on Jinsha Rive

在现场调研和深入研究宜宾—白鹤滩段岸坡地质背景和岩体力学环境条件的基础上,根据岸坡岩土体的结构特征和地形特征,将金沙江宜宾—白鹤滩段约410 km长的沿江地带岸坡类型划分为4个大类9个亚类9个小类,并详细阐述了各类岸坡发育分布特征与稳定性状况.结果表明,顺向等倾岸坡和斜向倾内层状岸坡是滑坡的易发地段,而崩塌则在陡倾内层状和斜向倾内层状岸坡中最易发生;变形体主要集中发育于平缓倾内层状岸坡和中一陡倾外层状岸坡.研究结果对金沙江宜宾—白鹤滩段岸坡稳定性评价和岸坡失稳的预测和防治具有重要的实际应用价值,可为“西电东送”重点工程区岸坡失稳的预测和防治提供了科学的地质依据.

By researching the locale and studying geologic background and rock -mechanics surroundings on hyroeijectric zone of Jinsha river（ Yibing -Baihetan）, the authors divide bank slopes into 9 types according to structure of rock and soil and terrain, and expatiate the distributing character and stability of each bank slope types, which serves as scientific geo - accordings in forecasting and controlling of bank slope＇s unsteady on hyroeijectric zone of Jinsha river.