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本文通过对粉土的物理力学特性的分析和讨论，指出了在粉土地区用粉性加固土做干线公路路面基层造成的破坏机理和产生的主要路面病害。在此基础上，提出了适合该地区的公路路面基层结构形式和基层类型。
In this paper, through the analysis and discussion of the physical and mechanical properties of silt, the failure mechanism and the main road surface diseases caused by the basement layer of the main highway with silty soil are pointed out. On this basis, put forward a suitable grassroots structure and grassroots type of road surface in this area.