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结合高速公路拓宽工程,采用弹塑性三维数值方法,借助三维薄膜单元模拟土工格室,分析山区高填方加宽路堤的位移与沉降规律,提出优化的格室处治方案,同时进行了现场试验,分析格室处治后路堤深层侧向位移与沉降规律。结果表明:数值模拟与现场试验结果规律相符,高填方路堤在加宽路基自重荷载作用下竖向位移主要集中在加宽路堤的中上部,侧向位移从路基顶面到底部逐渐减少。受上部路堤土俯冲荷载作用,加宽路堤底部侧向位移相对附近土体较大。格室可有效减少高填方加宽路堤的侧向变形及扩散荷载传递。
Combined with the widening project of expressway, the three-dimensional elasto-plastic numerical method was used to simulate the geocell with three-dimensional thin film elements and analyze the displacement and settlement rules of the wide embankment with high fill in mountainous area. The optimized grid chamber treatment scheme was proposed, Analysis of deep lateral displacement and settlement of embankments after grid cell treatment. The results show that the numerical simulation is consistent with the result of field test. The vertical displacement of high embankment embankments under widened embankment is mainly concentrated in the middle and upper part of the embankment. The lateral displacement decreases gradually from the top to the bottom of embankment. Affected by the subduction load of embankment on the upper part of the embankment, widening the soil near the bottom of the embankment is relatively large. Lattice can effectively reduce the lateral deformation of high embankment widening embankment and diffusion load transfer.