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首先简要综述了循环荷载下路基变形的研究现状。然后 ,基于饱和土体的动力耦合分析理论 ,研究了平面应变条件下的柔性路面路基变形的数值分析模型和方法 ,并建立了一个简单的粘弹性动力计算模型来预测路基在循环荷载下的动力反应。该模型可以全面考虑路基材料的剪切模量、阻尼比、孔隙水压力以及永久变形。最后 ,以一个柔性路面为例 ,应用本文方法在循环荷载下的路基变形发展进行了分析。
First of all, the research status of subgrade deformation under cyclic loading is briefly reviewed. Then, based on the theory of dynamic coupling analysis of saturated soils, the numerical analysis models and methods for the deformation of flexible pavement under plane strain are studied. A simple viscoelastic dynamic model is established to predict the subgrade under cyclic loading reaction. The model can take full account of the shear modulus of subgrade materials, damping ratio, pore water pressure and permanent deformation. Finally, taking a flexible pavement as an example, the deformation of embankment under cyclic loading is analyzed using this method.