中国地下水电站洞室群工程特点分析  

Characteristics of Hydropower Underground Caverns Engineering in China

作　　者：徐光黎[1] 李志鹏[1] 宋胜武[2] 陈卫东[2] 张世殊[2] 董家兴[3] 申艳军[4] 

机构地区：[1]中国地质大学(武汉)岩土钻掘与防护教育部工程研究中心,武汉430074 [2]中国电建集团成都勘测设计研究院有限公司,成都610072 [3]昆明理工大学电力工程学院,昆明650500 [4]西安科技大学建筑与土木工程学院,西安710054

出　　处：《地质科技情报》2016年第2期203-208,共6页Geological Science and Technology Information

基　　金：国家自然科学基金项目(41472263);雅砻江水电开发联合研究基金重点项目(50539100);中国水电工程顾问集团公司科研项目(P099)

摘　　要：近年来,我国的水电能源开发得到了空前的发展,取得了世界瞩目的成就。总结、归纳已有工程的特点,对地下工程建设具有重要的指导和借鉴意义。在收集、整理大量的国内外地下水电站洞室群资料的基础上,根据多年来地下水电站厂房工程实践,分析了我国地下水电站洞室群工程的特点。研究得出:随着时代的进步和开挖技术的发展,地下洞室群的断面面积、高度、宽度和长度均呈指数式快速增长,规模之大,居世界第一。花岗岩、灰岩、砂岩约占洞室围岩总数的67%,总体上围岩介质强度高,工程地质条件好。随着水电能源开发向西推进,地下洞室埋深的加大,原始地应力值越来越大,高地应力的地下洞室超过50%,导致地下洞室群出现了超乎寻常的变形和破坏事件。除重力驱动型破坏之外,应力驱动型和复合型破坏模式日益增多。建议针对高烈度、高地应力、围岩条件较差的洞室,应考虑采用曲线体形而不是沿袭拱顶直边墙体形。In recent years,hydroelectric energy in China has experienced an unprecedented development..Its remarkable achievements have important guiding significance and reference for underground construction to summarize the characteristics of the existing project.On the basis of collecting and,regulating a large number of data of hydropower underground caverns home and abroad,this paper analyzed the characteristics of hydropower underground caverns engineering in China according to the practice over the years.The results indicated that the sectional area,height,width and length of the underground caverns showed a rapid exponential growth with the progress of the time and the development of trenchless technology,and the large scale caverns ranked the first in the world.About 67% of the total number of surrounding rock were granite,limestone and sandstone,with the rock mass of high strength and good engineering geological conditions.With the development of hydroelectric energy westward,and the increasing depth of underground caverns,the primitive ground stress increased,and more than 50% underground caverns were under high ground stress.As a result,some extraordinary deformation and failure appeared in underground caverns.In addition to gravity-driven instability,stress-driven and complex instability modes were increasing.It is suggested that the curve body should be considered rather than following the top arch straight sidewalls in the high-intensity,high ground stress and poor rock conditions.

关 键 词：地下洞室群 规模 围岩 地应力 破坏 

分 类 号：TV731[水利工程—水利水电工程]