基于有限元模型的拓宽路基沉降规律分析

路基拓宽是目前道路领域中最常见的改建工程之一,在拓宽道路施工及运营阶段,容易产生不均匀变形而诱发各种道路病害.为了获得路基在拓宽后的变形状况,现运用通用有限元程序ABAQUS构建了路基拓宽模型.基于该模型,分析了道路地基顶面在拓宽工程影响下的沉降规律,并在此基础上分析了拓宽宽度、分层拓宽厚度及施工固结时间等因素对道路沉...

Analysis of Settlement Law of Subgrade Widening Based on Finite Element Modeling

Subgrade widening is currently one of the most common reconstruction projects in the field of roads.After the construction is completed,it is prone to various road distresses due to uneven deformation.To obtain the deformation law of the road after widening,finite element model of the subgrade widening was constructed based on the general-purpose finite element program ABAQUS in this paper.The settlement law of the ground under the widening of the subgrade was analyzed.On this basis,the influences of various factors on settlement were analyzed,including widening width,layer-widening thickness,and construction consolidation time.The results showed that after the subgrade was widened,the settlement deformation started from the center point of the old subgrade,reaching the maximum at the junction of the new and old subgrade,and then gradually decreased to the edge of the new one to 0.As the width of the new subgrade increased,the amount of ground settlement increased,and the curve became smoother.The influence of the layer-widening thickness on the final settlement was small,but the deformation path to the final settlement value was different.The effect of consolidation time during construction on the final settlement was negligible,but it had a more significant effect on the settlement after construction.