三峡库区奉节宝塔坪移民小区横磨子—大坪滑坡研究

Research on Hengmozi—Daping Landslide in Baotaping Area, Fengjie County, Three Gorges Reservoir Area

移民是三峡工程成败的关键。横磨子—大坪滑坡位于三峡库区奉节县新城宝塔坪小区， 是作者最新论证的多层复杂结构的滑坡， 体积约４００×１０４ ｍ ３， 前缘高程１７０ ｍ 左右。滑坡的成因机制为构造破碎岩溶溶蚀杏黄色泥质条带发育－ 滑坡，滑坡是多次性的。滑坡形成后又经历了强烈的溶蚀风化作用。滑坡目前整体处于稳定状态， 但移民迁建中应防止水向滑坡体的渗漏。

The population resettlememt project is the key part of the Three Gorges Project on the Yangtze River. Hengmozi—Daping Landslide in Baotaping Area, first put forward by the author recently, is a multilayered complex—texture landslide with volume about 400×10 4 m 3 and altitude of the leading edge about 170 m. The landslides occurred by the mechanics of fracture first ,then dissolution ,then formation of apricot yellow argillized zone, and finally then slides along the different zones .After the slides, there occurred strong latter reform. It is concluded, that the landslide was in stable statement at present, but the latter reform was continuing, so it was very important to forbid the landslide from any water. These results laid down the theoretical foundation for the solution of a great deal of problem in the Three Gorges Reservoir region. The suggestion about further exploration is given.