偏桥水电站引水隧洞施工全过程离散单元法仿真模拟研究  

Study on Discrete Element Modeling of Complete Construction Process of Diversion Tunnel in Pianqiao Hydropower Station

作　　者：梁自强 邓稀肥[2] 陈寿根[2] 

机构地区：[1]久隆水电开发有限公司,四川九龙626200 [2]西南交通大学,成都610031

出　　处：《隧道建设》2009年第1期45-49,53,共6页Tunnel Construction

摘　　要：偏桥水电站引水隧洞K2+010^+310地段位于节理发育岩体中,隧洞开挖后因没能及时支护引起岩体过度松弛,产生大量掉块现象。为保证隧洞的稳定性及基于工期的考虑,对该段隧洞的支护结构进行了优化设计,并采用国际广泛应用的离散单元法程序UDEC对该引水隧洞施工运营全过程进行了仿真模拟,探明了隧洞施工各阶段围岩内应力和位移分布,对支护结构优化设计进行了评估。同时,探讨了隧洞施工和运营全过程的离散单元法仿真技术。K2 ＋ 010 - ＋ 310 section of the diversion tunnel of Pianqiao Hydropower Station is located in heavily jointed rock mass. The surrounding rock mass has been greatly loosened and rockfall occurred due to delayed support after the excavation. In order to assure the tunnel stability and considering the tight construction period, the tunnel support is op- timized and the worldwide-used discrete element code UDEC is applied to simulate the complete tunnel construction and operation process so as to examine the stress and deformation distribution in rock mass at various stages of tunneling and to assess the optimized design of the tunnel support. Meanwhile, the simulation technology of tunneling and operation using UDEC is thus investigated.

关 键 词：水电站 引水隧洞 离散单元法 支护设计优化 仿真技术 

分 类 号：TV732[水利工程—水利水电工程]