摘要
早谷田危岩体位于金沙江乌东德水电站库区金台子峡谷河段出口左岸,上距库尾攀枝花市167.8km、下距坝址46.1km,因规模巨大(1.29×10^8 m^3)、成因机制复杂、大规模失稳影响严重而倍受关注。对此,简述了危岩体区基本地质条件,归纳了危岩体区岸坡结构特征与危岩体发育特征,深入分析危岩体成因机制,得出了特定岸坡结构、构造切割与临空条件是危岩体形成的重要基础,历史地震活动诱发、下游侧缘滑坡拉拽或牵动促使了危岩体现状的形成,水库蓄水运行将极大地改变危岩体现状环境、库水的浮托与软化作用将恶化危岩体稳定条件并促进其变形发展机理,为危岩体失稳模式分析、稳定性评价、对策研究等提供了依据,可为类似工程提供参考。
Zaogutian dangerous rock mass is located at the left bank of the Jintaizi Gorge section of the Wudongde Hydropower Station in the Jinshajiang River.It is 167.8 km away from Panzhihua City upstream and 46.1 km away from the dam site downstream.It has attracted much attention from the industry because of its huge scale(129 million m^3),complex genetic mechanism and serious impact of large-scale instability.This paper briefly describes the basic geological conditions of the dangerous rock mass area,summarizes the structural characteristics of the bank slope and the development characteristics of the dangerous rock mass in the dangerous rock mass area,and deeply analyzes the genetic mechanism of the dangerous rock mass.It is concluded that the specific bank slope structure,structural cutting and free surface are important foundations for the formation of dangerous rock masses.The historical earthquake activity and the downstream side landslide sloping or pulling promoted the formation of dangerous rock masses.The reservoir impoundment operation will greatly change the current situation of dangerous rock mass.The floating and softening effect of reservoir water will deteriorate the stability conditions of dangerous rock mass and promote its deformation and development.The result provides an important basis for analysis of dangerous rock mass instability mode,stability evaluation and countermeasure research,and can be used as a reference for similar projects.
作者
李会中
叶圣生
梁梁
潘路远
LI Hui-zhong;YE Sheng-sheng;LIANG Liang;PAN Lu-yuan(Changjiang Institute of Survey,Planning,Design and Research,Wuhan 430010,China;Sanxia Exploration and Survey Co,(Wu Han),Wuhan 430073,China;Faculty of Engineering,China University of Geosciences,Wuhan 430074,China)
出处
《水电能源科学》
北大核心
2020年第9期114-117,共4页
Water Resources and Power
基金
国家重点研发计划(2017YFC1501305,2017YFC1502601)。
关键词
乌东德水电站
早谷田危岩体
岸坡地质结构
成因机制分析
Wudongde Hydropower Station
Zaogutian dangerous rock mass
bank slope geological structure
genesis mechanism analysis
作者简介
李会中(1964-),男,教授级高级工程师,研究方向为水利水电、地质灾害防治等,E-mail:lihz8@163.com。
