水泥乳化沥青混凝土长寿命复合式路面结构研究

Research on CEAC Long-life Composite Pavement Structure

为减少长寿命复合式路面的沥青层厚度与反射性裂缝,将冷拌水泥-乳化沥青混凝土应用于高压应力区(联结层),并设置大粒径沥青碎石与水泥稳定碎石复合式基层。用三维有限元方法分析其路面设计控制参数以及路面材料宏观力学参数(弹性模量)与各层结构厚度对长寿面复合式路面的影响,结果表明各层材料最大拉应力、最大剪应力为强度控制指标更为合适,同时结合工程实际提出了水泥乳化沥青混凝土长寿命复合式路面结构,并应用于宜昌城区的试验路段。

In order to reduce the asphalt layer thickness and the reflective crack in long-life composite pavement,the cold mix CEAC is applied to high compressive stress area（ binder course）,meanwhile,the large particle sized asphalt macadam and cement stabilized macadam are used for composite base. The influence of its design control parameters,macro mechanical parameters（ elastic modulus） of pavement materials and thickness of each structural layer on the long-life composite pavement is analysed by 3D finite element model. The result shows that the maximum tensile stress and the maximum shear stress of each layer of material are more suitable as strength control parameters. The CEAC long-life composite pavement structure is proposed combining the project and applied in Yichang test road.