浅埋偏压连拱隧道现场监测与结构受力分析研究

摘要

针对浅埋偏压连拱隧道结构受力的复杂性，结合石红高速大中山1#连拱隧道的实际情况，选择典型断面埋设监控量测设备对隧道施工过程中围岩变形和结构受力进行适时监测，并结合有限元分析软件MIDAS，对中隔墙空间受力特征进行研究。得出了支护结构在偏压作用下和施工扰动下的受力状态和变形特征。结果表明，在浅埋偏压条件下，减少支护结构受力的不均对于保证隧道结构稳定的重要性以及运用监控量测与数值模拟相互印证的方法可以更准确地分析隧道结构的稳定性，更好地指导施工。%According to the complexity in the construction of shallow-buried bias multi-arch tunnel and the actual situation of Dazhongshan1# tunnel, setting testing component in typical cross-sections, the tunnel’s surrounding rock and supporting structure force are duly monitored.comparing with the result about software MIDAS analyzed force of the mid-board can be drawn the characteristics of force and deformation when the tun-nel under unsymmetrical pressure. the result concluded that toreduce unbalanced force make a important role anduse twoanalytical methods can precisely analysis the stability of structure and efficiently guide construction.