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基于中国半刚性基层水泥混凝土路面的使用经验,通过增加柔性联接层对现有路面结构进行改良,从而改善半刚性基层水泥混凝土路面的受力状态。利用有限元方法,建立加铺柔性联接层的水泥混凝土路面结构的3D有限元模型,对不同联接层材料模量和厚度情况下的路面各结构层进行力学分析。研究结果表明:半刚性基层自身变形随联接层厚度增加而递减,面层变形基本不受影响;水泥混凝土面板板底最大拉应力随联接层模量的增大逐渐减小,而半刚性基层和联接层层底拉应力逐渐增加;以上各结构层的变形能力和力学性能随联接层厚度和模量变化而变化的规律,为确定联接层合理的层厚和材料参数提供了一定的理论基础。
Based on the experience of using semi-rigid base concrete pavement in China, the existing pavement structure is improved by adding flexible coupling layer to improve the stress state of semi-rigid base concrete pavement. The finite element method is used to establish 3D finite element model of cement concrete pavement structure with flexible coupling layer. The mechanical properties of pavement structure layer are analyzed under different modulus and thickness of tie layer material. The results show that the deformation of the semi-rigid base decreases with the increase of the thickness of the tie layer, and the deformation of the surface layer is basically unaffected. The maximum tensile stress at the bottom of the cement concrete slab decreases with the increase of the modulus of the tie layer, The tensile stress at the bottom of the tie layer gradually increases. The deformation and mechanical properties of the above structural layers vary with the thickness and modulus of the tie layer, which provides a theoretical basis for determining the reasonable layer thickness and material parameters of the tie layer.