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目前,国内道路基层采用的机构类型绝大多数为半刚性结构。半刚性基层强度和刚度较易控制,能满足设计荷载和交通量的要求,但半刚性基层易产生裂缝和网裂,裂缝反射到沥青面层,又会沿裂缝渗水在沥青面层长生唧浆,最后产生网裂和坑槽,既影响路面美观和行车舒适,又会增加养护费用和减少道路使用寿命,研究如何预防半刚性基层裂缝和处理路面反射裂缝意义重大。
At present, most of the types of agencies adopted by the domestic road and grassroots are semi-rigid structures. Semi-rigid basement strength and stiffness easier to control, to meet the design requirements of load and traffic, but the semi-rigid base prone to cracks and nets, cracks reflected to the asphalt surface, will crack along the water seepage in the surface layer of raw jerky , And finally produce net break and pit, which not only affects the aesthetics and driving comfort of the road, but also increases the maintenance cost and reduces the service life of the road. It is of great significance to study how to prevent the semi-rigid base crack and deal with the reflective crack of pavement.