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为了研究车辆荷载作用下炭质泥岩路堤动力变形特征,运用FLAC3D模拟实际工况,在不连续半正弦波荷载作用下,考虑单轮组加载,分析路堤的动力响应以及不同工况下的变形特征。结果表明:炭质泥岩路堤在单次或重复车辆荷载作用下,均表现出明显的弹塑性变形特点;路堤横向位移在加载区域两侧向两边发展,在坡脚处达到最大值,路堤竖向位移在加载区域附近变形较大,且路堤变形以竖向位移为主,主要工作区范围为路床顶面以下3~6m;车速越大,路堤变形越小;车载越大,荷载影响深度越深,路堤变形越显著;比较满车道布载方式和单车道居中布载方式,前一工况时路堤的竖向变形和工作区范围更为显著。
In order to study the dynamic deformation characteristics of embankment with carbonaceous mudstone under vehicle load, FLAC3D was used to simulate the actual working conditions. Under the action of discontinuous half sine wave loads, the dynamic response of embankment and the deformation characteristics under different working conditions were analyzed. . The results show that the carbonaceous mudstone embankment shows obvious elastic-plastic deformation under the single or repeated vehicle loads. The lateral displacement of the embankment develops on both sides of the loading area and reaches the maximum at the foot of the slope, The deformation of the embankment is mainly vertical. The main work area is 3 ~ 6m below the road surface. The larger the vehicle speed, the smaller the embankment deformation. The larger the vehicle load, the deeper the influence of load Depth and embankment deformation are more significant. Compared with the full lane loading method and the single lane middle loading method, the vertical deformation and working area of the embankment in the former condition are more significant.