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应用有限元软件分别针对两种围岩级别下有无注浆加固圈4种工况,对某高速公路隧道富水区段开挖过程的水—力耦合效应进行了分析。结果表明:注浆圈的施作,在改变水头等高线分布的同时改变了隧道附近一定范围内围岩的综合渗透系数,减小了隧道内的排水量。但排水量并不随注浆圈厚度的增大而有明显减小。数值分析可以很好地反映注浆圈对围岩的止水作用,可为同类工程问题的解决提供依据。
In this paper, the finite element software is used to analyze the water-power coupling effects of excavation of a expressway tunnel in the water-rich section. The results show that the application of grouting circle changes the comprehensive permeability coefficient of surrounding rock within a certain range near the tunnel while changing the distribution of water head contour line, and reduces the displacement within the tunnel. However, the displacement did not increase with the increase of grouting ring thickness and significantly reduced. Numerical analysis can well reflect the grouting ring sealing effect on the surrounding rock, which can provide the basis for solving similar engineering problems.