摘要
紫坪铺 2号导流隧洞有规模较大的Lc 和L9断层斜穿 ,堵头末端存在导流洞与泄洪洞交汇的不利空间。运用三维有限元方法模拟其开挖过程 ,分析了采用锚杆支护和全断面混凝土衬砌两种方案的围岩变形和稳定性 ,计算结果表明全断面混凝土衬砌在开挖过程中对于抑制围岩的回弹变形和破坏效果显著。
With the large scale faults Lc and L 9 passing through the 2# diversion tunnel of Zipingpu project, and the existence of disadvantageous space at the end of plug due to the intersection of diversion tunnel and spillway tunnel, it is necessary to simulate the excavation process by 3D FEM in order to analyze and compare the deformation and stability of the supporting rock when using anchor supporting or concrete lining. The comparison shows that concrete lining on the whole section is much more effective in restraining the springing deformation and damage of the supporting rock.
出处
《红水河》
2003年第1期43-47,51,共6页
Hongshui River
关键词
导流洞
开挖
锚杆支护
混凝土衬砌
围岩变形
稳定性
紫坪铺水利枢纽
diversion tunnel
excavation
anchor supporting
concrete lining
deformation of the supporting rock
stability
Zipingpu hydro-project
