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.
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
关键词
软弱围岩
锚杆
参数优化
隧道
数值模拟
soft rock mass
anchor
parameter optimization
tunnel
numerical simulation
