摘要
偏桥水电站是一座长引水式(引水隧洞长7.432 km、压力钢管长530 m)中高水头(额定水头198 m)电站。隧洞沿线山高坡陡埋深大、工程地质条件较复杂。在引水隧洞施工开挖过程中,根据实际揭示的地层岩性、围岩风化程度、岩爆程度、地下水发育等情况,在充分利用洞室围岩的自稳、承载、抗渗能力的基础上,对洞室横断面衬砌结构形式进行实时调整优化,达到简化施工程序、缩短工期、节约投资的目的,顺利通过了水电站初期引水发电的考验。
Pianqiao hydropower station is a long diversion type（7.432 km long headrace tunnel and 530 m long penstock） station,with middle-high head（198 m rated head）.The tunnel has complicated geological conditions and great buried depth,along the tunnel there are high mountains and steep slopes.In tunnel excavation,based on the exposed lithology,weathered surrounding rocks,rock burst and groundwater development,the cross section lining type was adjusted and optimized timely by full use of self stability,bearing capacity and impermeability of surrounding rocks,so as to simplify the construction procedure,shorten construction time and save investment.The Lining has been proved successful by initial water diversion and power generation.
出处
《西北水电》
2010年第5期21-25,共5页
Northwest Hydropower
关键词
引水隧洞
衬砌结构形式
设计与优化
偏桥水电站
headrace tunnel
lining structure type
design and optimization
Pianqiao hydropower station
