中国西藏高海拔河谷崩塌灾害及其生态效应研究  

Study on Collapse Disaster and Its Ecological Effect in High Altitude Valleyin Tibet of China

作　　者：赵永辉 王黎[2] 任才让旦主 王赟 杨金华 洛桑次仁 ZHAO Yong-hui;WANG Li;REN Cai-rang-dan-zhu;WANG Yun;YANG Jin-hua;LUO Sang-ci-ren(Tibet Hydraulic and Electric Planning,Survey and Design Institute,Lhasa 850000,China;Sinohydro Foundation Engineering Co.,Ltd,Tianjin 301700,China)

机构地区：[1]西藏自治区水利电力规划勘测设计研究院,西藏拉萨850000 [2]中国水电基础局有限公司西藏分公司,天津301700

出　　处：《河北地质大学学报》2021年第2期84-88,共5页Journal of Hebei Geo University

基　　金：地质灾害防治与地质环境保护国家重点实验室自由探索课题资助(SKLGP2017Z010)。

摘　　要：初步阐明了中国西藏雅鲁藏布江流域高海拔河谷斜坡人工边坡处崩塌地质灾害发育特征、成因演化及其生态效应,初步认为崩塌源特殊的地形地貌为产生崩塌地质灾害提供了有利的地形条件,优势结构面和挤压破碎带使其形成了不利于斜坡自身稳定的楔形变形体,人工边坡开挖是产生崩塌的诱发因素。崩塌演化过程大致可分宽谷阶段、河谷下切-结构面形成阶段和边坡开挖-崩塌产生阶段。崩塌改变了河谷斜坡原有的地形地貌,造成河谷斜坡草地和灌木面积锐减,易造成水土流失,建议采用生态护坡治理措施。The development characteristics,genetic evolution and ecological effects of collapse geological disasters at the artificial slope of the high-altitude valley slope in the Yarlung Zangbo River basin of Tibet of China,are preliminarily clarified.It is preliminarily considered that the special topography of collapse source provides favorable terrain conditions for the occurrence of collapse disasters,the dominant structural plane and compressive fracture zone make it form a wedge-shaped deformation body which is not conducive to the stability of the slope itself,and the artificial slope excavation is the inducing factor of collapse.The process of collapse evolution can be divided into broad valley stage,valley undercutting structural plane formation stage and slope excavation collapse stage.The collapse changes the original topography of the valley slope;the collapse causes a sharp decrease in the area of grassland and shrubs on the valley slope;the collapse is easy to cause soil erosion,so it is suggested to adopt ecological slope protection measures.

关 键 词：崩塌 生态效应 发育特征 优势结构面 

分 类 号：P642[天文地球—工程地质学]