三峡地下电站尾水洞槽挖洞间岩墩稳定性分析  

Stability analysis for separating rock wall between tailrace tunnels of TGP

作　　者：王家祥[1] 叶圣生[1] 王德阳[1] 孙青兰[1] 潘玉珍[1] 王正波[1] 

机构地区：[1]长江水利委员会长江三峡勘测研究院有限公司,湖北宜昌443003

出　　处：《人民长江》2007年第9期66-68,共3页Yangtze River

摘　　要：三峡地下电站尾水洞出口段槽挖洞间岩墩具高陡单薄、多面临空及顺坡向中缓倾角裂隙较为发育的不利边界条件。根据尾水洞出口段正面坡开挖揭露地质条件,分析了槽挖前后边坡与岩礅的稳定条件及变形机理,采用GeneralBlock三维块体程序确定关键块体并进行稳定性分析,提出了岩墩稳定控制的工程措施建议,为岩墩的支护设计与施工开挖提供了理论根据。The separating rock wall between excavated tunnels for tail water outlet of TGP is high and thin,with multiple free faces,unfavorable boundary condition of positive middle and low declination fissure.According to excavated geological condition of the tailrace tunnel,the stability condition and deformation mechanism of side slope and separating rock wall is analyzed,and 3 dimensional GeneralBlock program was used to determine the key blocks and analyze their stability,and engineering measures for the stablity of separating rock wall are put forward,supplying theoretic base for support design and construction of the separating wall.

关 键 词：尾水洞 洞间岩墩 GeneralBlock 稳定性分析 工程措施建议 三峡地下电站 

分 类 号：TU457[建筑科学—岩土工程]