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以杭州城某主干道加固改造工程的水泥稳定碎石基层试验路段为研究对象,通过室内试验研究早龄期水稳碎石力学特性,采用ABAQUS有限元软件结合现场监测对不同龄期和不同轴载作用下的受力情况进行分析。现场实测结果与有限元计算得到的基层层底弯拉应变基本吻合,5天后两者趋于一致,表明水泥稳定碎石基层性能趋向稳定。同时,数值计算表明开放交通初期应控制通行车辆轴载,在水泥稳定碎石基层摊铺及面层施工完成6h后仅能通行轴载4t以下车辆。
Taking the test section of the cement stabilized macadam base course in the reinforcement project of a major urban road in Hangzhou as the research object, the mechanical characteristics of the early stage hydropower stabilized gravel were studied through laboratory tests. The effects of different age and different levels Axial load under stress analysis. The measured results in the field agree basically with the bending strain at the base of the base layer calculated by the finite element method. After 5 days, the two tend to be consistent, indicating that the performance of the cement stabilized macadam base tends to be stable. At the same time, the numerical calculation shows that the traffic load should be controlled at the initial stage of open traffic. Only vehicles under 4t axle load can only pass 6 hours after paving of cement stabilized gravel base and surface finish.