摘要
南水北调西线一期工程由“四坝、二堰、七洞”组成,年调水量40×108 m3。工程的最大难点在于深埋长隧洞的勘察、设计与施工。工程地质条件相对复杂,枢纽的建坝地质条件较好,块石料满足要求,库区淹没损失小。隧洞区的主要岩石类型为三叠纪的砂岩和板岩,局部出露有灰岩和岩浆岩。深埋长隧洞存在着诸多复杂的工程地质和岩石力学问题,但在目前的经济技术条件下是可以解决的,不存在制约西线工程实施的技术难关和地质条件。
The first phase of west route of South-to-North Water Transfer Project consists of 4 dams, 2 weirs and 7 tunnels which transfer water of 4 billion cubic meters to the Yellow River annually. The most complicated part of the project belongs to the design and construction of these long tunnels at great depths. The majority of strata lithology are Triassic sandstone and slate; and the dam condition is good. With complicated engineering geologic condition, the major existing problems include the stability of surrounding rock passing through shattered zone, high geostress and high geo-temperature of deeply bedded tunnels, inrush of water, and the slope stability of tunnel＇s intake. These complex engineering geologic problems can be solved. The geological condition is feasible. The elevation of the project varies from 3 400 m to 4 800 m, where oxygen is in shortage and heavy physical labor is not applicable. So TBM method is acceptable, whose double protection shields are adopted for excavation in the project.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第20期3603-3613,共11页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(90302011)
关键词
岩石力学
南水北调西线工程
深埋长隧洞
地质条件
rock mechanics
west route of South-to-North Water Transfer Project
deep-lying long tunnel
geological condition
