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溪洛渡水电站谷幅变形成因与形成条件
引用本文:周志芳,李鸣威,庄超,郭巧娜.溪洛渡水电站谷幅变形成因与形成条件[J].河海大学学报(自然科学版),2018,46(6):497-505.
作者姓名:周志芳  李鸣威  庄超  郭巧娜
作者单位:河海大学地球科学与工程学院, 江苏 南京 211100,河海大学地球科学与工程学院, 江苏 南京 211100,河海大学地球科学与工程学院, 江苏 南京 211100,河海大学地球科学与工程学院, 江苏 南京 211100
基金项目:国家自然科学基金重大研究计划(91747204);中国长江三峡集团有限公司项目资助(20188019316)
摘    要:基于溪洛渡水电站地质环境,从水库蓄水引起的区域水文地质条件变化入手分析溪洛渡水电站谷幅变形的成因、研究谷幅变形的形成条件。结果表明:溪洛渡水电站水库蓄水引起的谷幅、库盘变形与电站位于永盛向斜盆地内、坝基玄武岩层下埋藏有厚层阳新灰岩承压含水层有关,谷幅、库盘变形规律与库区区域地质、水文地质条件和水库蓄水位、水库蓄水过程等密切相关;库盘变形、谷幅变形属于一种特殊的库岸变形。

关 键 词:水库  谷幅变形  水文地质  承压含水层  库岸变形  溪洛渡水电站

Impact factors and forming conditions of valley deformation of Xiluodu Hydropower Station
ZHOU Zhifang,LI Mingwei,ZHUANG Chao and GUO Qiaona.Impact factors and forming conditions of valley deformation of Xiluodu Hydropower Station[J].Journal of Hohai University (Natural Sciences ),2018,46(6):497-505.
Authors:ZHOU Zhifang  LI Mingwei  ZHUANG Chao and GUO Qiaona
Institution:School of Earth Science and Engineering, Hohai University, Nanjing 211100, China
Abstract:This study analyzes the causes and forming conditions of valley deformation based on the geological environment of Xiluodu hydropower station and the evolution of regional hydrogeological conditions induced by the impoundment. It reveals that the foundation and valley deformation are related to facts that the dam is located within the Yongsheng synclinal basin and the basalt layer consisting of the dam foundation situates above a thick confined aquifer consisting of Yangxin limestone. The patterns of valley and foundation deformation are closely related to the regional geological conditions, hydrogeological conditions and the reservoir impoundment process, etc. On such basis, internal and external factors of foundation and valley deformation are revealed. At the same time, it has been pointed out that the foundation and valley deformation belong to a special bank deformation. At last, definitions and classification of two deformation types are provided.
Keywords:reservoir  valley deformation  hydrogeology  confined aquifer  reservoir bank deformation  Xiluodu Hydropower Station
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