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为提高二灰碎石基层平整度，在组成设计、拌和、摊铺、碾压等过程中，对影响二灰碎石基层平整度的因素进行了分析研究。结果表明：碎石级配不良、拌和时间短、含水量不准确、“硬方”接茬及压实机械操作不规范等是造成二灰碎石基层平整度较差的主要因素。改进施工措施，如加强拌和站及交通管理、提高施工员素质、改变施工工艺，并采取小段成型及松方接茬施工方法，可使二灰碎石基层平整度得到有效控制，平整度偏差符合规定要求。
In order to improve the flatness of the lime-flyash gravel base, factors influencing the flatness of the lime-flyash gravel base were analyzed in the process of composition design, mixing, paving, rolling and so on. The results showed that poor grading of gravel, short mixing time and inaccurate water content resulted in the bad flatness of the grading of lime - fly ash and gravel stratum. Improve the construction measures, such as strengthening the mixing station and traffic management, improve the quality of construction workers, change the construction process, and take a small section of molding and pine stubble stubble construction method, the lime and gravel base formation can be effectively controlled flatness deviation in line with the requirements .