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鉴于数值模拟技术在模拟土体渗流方向上几乎不受外界干扰、计算可重复性高等优势,以室内砂槽模型试验为背景,采用有限差分软件FLAC3D模拟了双层堤基中悬挂式防渗墙的贯入深度、布置位置对渗透变形的影响。结果表明,悬挂式防渗墙防渗效果随贯入深度的增加而更为显著;防渗墙布置在靠近下游位置时可抑制渗透变形在墙后背水侧发展,从而避免堤身沉降出现溃堤事故;数值模拟结果与室内模型试验数据基本吻合,说明运用数值模拟分析渗透变形是可行的。
In view of the fact that the numerical simulation technology is almost free of outside interference in simulating the seepage direction of soil and calculating the advantage of high repeatability and so on, taking the indoor sand tank model test as the background, the finite difference software FLAC3D is used to simulate the double- Penetration depth, the impact of placement on infiltration deformation. The results show that the anti-seepage effect of hanging seepage prevention wall is more significant with the penetration depth increasing. The anti-seepage wall arrangement can inhibit the infiltration deformation from developing on the back of the water wall near the downstream position, so as to avoid the embankment collapse Accident; Numerical simulation results are in good agreement with indoor model test data, which shows that it is feasible to analyze the infiltration deformation by numerical simulation.