中文摘要：

针对北京地铁4#线西单站暗挖隧道工程,制定了支护结构内力监测方案.通过钢拱架轴力的监控量测,掌握施工过程中初期支护结构内力状态的动态变化以及对隧道变形和结构稳定性的影响并及时反馈,为判断隧道安全稳定提供了参考数据.

英文摘要：

The ground surface settlement and deformation of existing tunnels of subway stations undercut with shallow overburden have important effects on the construction safety.This paper introduces the processes of tunnel excavating of the Xidan station of Beijing subway line 4 Xidan station.A scheme for monitoring structural forces is drawn up.The trends of structural forces and rock pressure are under control,and the reference information is provided to judge the stability and safety of the tunnel by monitoring information feedbacks.