仰拱对隧道安全性影响研究

Study on the Tunnel Safety Based on the Impact of Inverted Arch

以太中银铁路王家庄隧道工程为例,计算了仰拱抬高情况下的衬砌内力及安全系数,探讨了仰拱位置变化对隧道衬砌内力和整体稳定性的影响,计算结果表明:随着仰拱的抬高,隧道衬砌内力随之增大,安全系数随之减小,但变化不大,衬砌结构的安全系数满足规范要求.

Wangjiazhuang tunnel project in Taizhongyin Railway is taken as an example to calculate the invert elevation of the lining of internal force and the safety factor,and to explore the impact of the law about the change in invert position on the tunnel lining internal force and the overall stability. The result shows that in the wake of the invert elevation, the tunnel lining internal force increases, at the same time, the safety factor decreases. However, the change is small, and the safety of the lining structure can meet the standard requirements.