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为分析V形冲沟特有的地形条件对超高路堤稳定性与变形的影响,运用数值计算方法,选取不同的冲沟岸坡坡度、沟底宽度、沟谷纵坡、路基边坡坡度,对V形冲沟超高路堤的安全系数及变形进行了系统分析。结果表明:相同条件下边坡的三维安全系数高于二维安全系数,且均由冲沟岸坡、冲沟宽度尺寸、沟底宽度引起,可将其称为三维效应,而沟谷纵坡坡度和路基边坡坡度引起的三维安全系数和二维安全系数的变化规律一致,不能称为三维效应;与二维柱状滑动面相比,单级边坡和多级边坡三维滑裂面的形状均为三维曲面;研究成果对于V形冲沟超高路堤稳定性的分析和设计方法的完善具有理论和工程应用价值。
In order to analyze the influence of V-shaped gutter’s unique topography on the stability and deformation of ultra-high embankment, numerical calculation method was used to select different gully slope, ditch width, longitudinal gully and subgrade slope, Sinking ditch embankment safety factor and deformation of a systematic analysis. The results show that under the same conditions, the three-dimensional safety factor of slope is higher than that of two-dimensional safety factor. Both of them are caused by gully bank, gully width and gully width, which can be called three-dimensional effect. The three-dimensional safety factor and the two-dimensional safety factor caused by the gradient of subgrade slope are consistent and can not be called the three-dimensional effect. Compared with the two-dimensional columnar sliding surface, the shape of three-dimensional sliding surface of single-stage slope and multi-stage slope are The research results have theoretical and engineering application value for the analysis of V-shaped gully embankment stability and the improvement of design methods.