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根据动力有限元理论建立隧道非线性有限元模型,对整个地下结构进行瞬态动力分析。确定出在地震荷载作用下隧道围岩各点的地震剪应力,和计算出的抗液化剪应力比较,找到隧道周围的液化点,进而确定出隧道周围的液化区域。然后加固液化区,对比加固前后隧道衬砌的应力和位移的变化来评价加固效果。
According to the dynamic finite element theory, a nonlinear tunnel finite element model is established to analyze the transient dynamics of the entire underground structure. Determine the seismic shear stress at each point of the surrounding rock of the tunnel under seismic load and compare with the calculated liquefaction-resistant shear stress to find the liquefaction point around the tunnel and then determine the liquefaction area around the tunnel. Then, the liquefaction area is reinforced to evaluate the reinforcement effect by comparing the changes of the stress and displacement of the tunnel lining before and after reinforcement.