西藏拉洛水利枢纽大坝沥青混凝土心墙地基工程地质评价  

Engineering geological evaluation on foundation of dam asphalt concrete core wall for dam of Laluo Hydro Project in Tibet

作　　者：黄振伟 杜胜华 雷明 HUANG Zhenwei;DU Shenghua;LEI Ming(Changjiang Geotechnical Engineering Co.,Ltd.,Wuhan 430010,China;National Research Center for Dam Safety Engineering,Wuhan 430010,China)

机构地区：[1]长江岩土工程有限公司,湖北武汉430010 [2]国家大坝安全工程技术研究中心,湖北武汉430010

出　　处：《水利水电快报》2022年第11期8-12,共5页Express Water Resources & Hydropower Information

基　　金：中国大唐集团公司科研项目(DTXZ-02-2021)。

摘　　要：西藏拉洛水利枢纽大坝坝址区域地质条件复杂,且沥青混凝土心墙是大坝重要的防渗结构,对地基要求较高。为选择合适的心墙建基岩体,对坝基覆盖层、承压水的工程地质、水文地质特征开展了深入勘察,并对心墙地基进行了承载能力和渗透性评价。结果表明:拉洛大坝心墙地基承载力满足要求,基岩承压水与库水无水力联系。该大坝心墙地基工程地质评价方法及相关勘察技术可为类似工程提供借鉴。The dam geological conditions of Laluo Hydro Project in Tibet are complex, while asphalt concrete core wall is an important impervious structure of the dam, and has high requirements for the foundation.In order to determine the appropriate rock mass for asphalt concrete core wall foundation, the engineering geological and hydro-geological characteristics of the dam foundation overburden and confined water were investigated in depth, and the core wall foundation was evaluated from bearing capacity and impermeability.The results showed that: the bearing capacity of core wall foundation in Laluo Hydro Project dam met the requirements, and there is no hydraulic connection between confined water and reservoir.This engineering geological evaluation method for foundation of core wall and related survey technology can be used as a reference for similar projects.

关 键 词：沥青混凝土心墙 承载能力 渗透性 脉状承压水 工程地质评价 拉洛水利枢纽工程 西藏 

分 类 号：TV221.2[水利工程—水工结构工程]