沐若水电站引水隧洞岩体质量与变形特征分析  

Research on rock quality and deformation characteristics of water diversion tunnel in Murum Hydropower Station

作　　者：谭朝爽[1] 杨火平[1] 贺金明[1] 

机构地区：[1]长江三峡勘测研究院有限公司(武汉),湖北武汉430010

出　　处：《人民长江》2013年第8期13-14,22,共3页Yangtze River

摘　　要：马来西亚沐若水电站布置2条引水隧洞,单洞长2.7 km,隧洞穿过地层主要为页岩、砂岩及其组合岩体,岩层陡倾,洞轴线与地层走向近垂直。隧洞沿线地下水位较高,地下水丰富,下平段埋深大,外水压力较高。施工过程中,围岩的稳定问题突出,其中主要是软岩的稳定问题。根据分析研究成果并结合现场实际情况确定了围岩工程级别,解决了长引水隧洞的围岩稳定问题。Two diversion tunnels with a length of 2.7 km each is adopted for Murum Hydropower Station of Malaysia and the stratum through which the tunnel passes is mainly consisted of shale, sandstone and their composite, the strata is steep and the tunnel axis is nearly perpendicular to the strata strike. The groundwater is abundant and the groundwater level along the tunnel is higher;the buried depth of lower horizontal section of the tunnel is large with a higher external water pressure. In the process of construction, the stability problem of surrounding rock is prominent, especially the stability of soft rock. According to the field a- nalysis results and the actual condition, the engineering grade of surrounding rock is determined and the problem of surrounding rock stability of long water tunnel is solved.

关 键 词：引水隧洞 工程岩体质量 变形破坏 沐若水电站 

分 类 号：TV672.1[水利工程—水利水电工程]