深埋软弱围岩隧道锚杆参数优化数值模拟  

Optimized Numerical Simulation on Anchor Parameters of Deep-buried Tunnel in Soft Rock Mass

作　　者：胡建敏[1] 尹清锋[2] 白冰[2] 

机构地区：[1]河北建设勘察研究院有限公司,河北石家庄050031 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《探矿工程（岩土钻掘工程）》2008年第5期72-76,共5页Exploration Engineering:Rock & Soil Drilling and Tunneling

摘　　要：基于乌鞘岭隧道几种典型断面优化的结果,运用有限差分程序FLAC3D,对支护结构的锚杆参数进一步进行优化,包括锚杆的最优长度、横向间距和纵向间距等。研究表明,隧道的拱顶下沉量随锚杆长度的增加而逐渐减小。隧道的拱顶下沉量和墙腰收敛值随锚杆横向间距或者纵向间距的增加而增大,而且当锚杆横向间距超过0.8m或者纵向间距超过1 m后,锚杆的作用就不明显了。Based on the optimized cross-section shapes of Wushaoling tunnel, the optimization parameters of anchor are analyzed by the finite difference procedure of FLAC^3D. These parameters include the optimized length of anchor and the spacing between anchors in length and width of the tunnel. Studies show that the settlement at the arch top of the tunnel decreases with the increase of the lengths of anchors, the settlement at the arch top and horizontal displacement at the side of the tunnel increases with the increase of the spacing between anchors in length and width. Furthermore, the effects of anchor would be destructed when the spacing is greater than 0.8m in width and lm in length.

关 键 词：软弱围岩 锚杆 参数优化 隧道 数值模拟 

分 类 号：U45[建筑科学—桥梁与隧道工程]