V形冲沟超高路堤稳定性三维效应研究  

Research on 3D Effect of V-shaped Gully on Super-high Embankment Stability

作　　者：吴国雄[1] 曹竞荣[1] 丁静声[1] 刘先义[2] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074 [2]招商局重庆交通科研设计院有限公司,重庆400067

出　　处：《中国公路学报》2013年第1期1-8,共8页China Journal of Highway and Transport

基　　金：重庆市交通委员会科技项目(2007CQJTK023)

摘　　要：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 effect of the special terrain of V-shaped gully on the stability and deformation of super-high embankment, a numerical calculation method, with different gully sideslopes, gully bottom widths, gully slopes and embankment slopes selected, was proposed to study the safety factors and deformation of super-high embankment under V-shaped gully. The analysis results show that the 3D safety factors, at different gully sideslopes, gully widths and gully bottom widths, are higher than those of 2D under the same conditions, therefore the gully effect is 3D effect. However, the 3D safety factors obtained at different gully slopes and embankment slopes are identical with those of 2D, thus the gully effect here is not 3D effect. Compared with the cylindrical sliding surfaces by 2D method, the sliding surfaces of either the single or multi-layer embankment are 3D. This research has theoretical and practical significance to the stability study and design of super-high embankment in V-shaped gully.

关 键 词：道路工程 超高路堤 数值计算 V形冲沟 稳定性 三维效应 三维滑裂面 

分 类 号：U416.12[交通运输工程—道路与铁道工程]