长江巫峡河谷地质灾害主要特征与演化研究

Characteristics of Geomorphic Hazards in Wu Gorge Bank Slope and the Mechanism for Their Development

滑坡与危岩崩塌是三峡地区主要地质灾害,对人民群众生命财产和长江河道航行安全构成严重威胁.选取长江巫峡重庆段崩滑灾害为研究对象,在大量现场调查与测量基础上,将研究区地质灾害科学划分为岩质崩滑、崩积-残坡积滑坡和危岩崩塌三大类;结合灾害实例对其发生机理和破坏方式进行了探讨,并从河谷边坡演化的地质-力学动态角度,阐明了崩滑灾害孕育发展过程和垂直分布特点.

Landslide and rock avalanche are the main geomorphic hazards in the Three Gorges of the Yan-gtze River and constitute a great threat to the safety of the peoples’ lives and property and the navigation safety of the Yangtze River channel .In this study ,investigation and field measurement of slide and rock avalanche were made in Chongqing section of Wu Gorge and ,based on the results ,the geomorphic hazards of the study area were divided into three types ：rock slumping ,colluvium-debris landslide and rock ava-lanche .Then examples of the local geomorphic hazards were cited to discuss their failure mechanism .The development process and vertical distribution characteristics of the hazards were illuminated from the per-spective of dynamic evolution processes of slope .