杨房沟水电站左岸坝基断层蚀变岩蚀变特征与工程特性研究  

ALTERED ROCKS DEVELOPED IN THE LEFT-BANK DAM FOUNDATION OF YANGFANGGOU HYDROPOWER STATION: ALTERATION CHARACTERISTICS AND ENGINEERING PROPERTIES

作　　者：段伟锋 燕俊松 杨日昌 沈军辉[2] DUAN Wei-feng;YAN Jun-song;YANG Ri-chang;SHEN Jun-hui(ChinaPower Huadong Engineering Corporation Limited,Hangzhou 311122,China;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,杭州311122 [2]地质灾害防治与地质环境保护国家重点实验室(成都理工大学),成都610059

出　　处：《地质灾害与环境保护》2021年第4期52-57,共6页Journal of Geological Hazards and Environment Preservation

基　　金：国家自然科学基金项目(41572308);中国电建集团华东勘测设计研究院有限公司科研基金项目(FH18SKI009B)。

摘　　要：杨房沟水电站左岸坝基沿断层f27发育蚀变岩体,构成了左岸坝基岩体内主要的地质缺陷。论文就该蚀变带岩石蚀变特征及工程特性进行研究,针对不同蚀变程度岩石开展了系统的矿物岩石学和物理力学性质测试,在此基础上提出了蚀变带工程处理方案,并采用三维有限元数值模拟对处理方案进行了论证,其结果对于保证大坝安全建设和运行具有重要的现实意义,同时也丰富了岩石蚀变及其工程影响方面的认识。The altered rocks developed along the fault f27 constitute the main geological flaws in the left-bank dam foundation of Yangfanggou Hydropower station. This paper focuses on the alteration characteristics and engineering properties of the altered rocks. Petrologic and mineralogical researches, and physico-mechanical tests were performed systematically on the altered rocks. On this basis, engineering treatments for the alteration zone were proposed. 3 D finite element analyses were conducted to verify the feasibility of the treatments. The obtained results are significant for the the safety of dam construction and operation. They also enrich the understanding of rock alteration and its engineering influence.

关 键 词：蚀变岩 矿物岩石学特征 工程特性 三维有限元模拟 

分 类 号：P642[天文地球—工程地质学] TV74[天文地球—地质矿产勘探]