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In order to study the adaptability of reasonable pavement structure in permafrost regions, the first-stage construction of Gonghe-Yushu highway from K629 + 800 ~ K634 + 200 is taken as test section, and establishes the numerical simulation model of subgrade and pavement by using Flac3D software. Compares and analyzes the mechanical properties with semi-rigid base asphalt pavement and flexible base asphalt pavement structure. In the end, recommends a reasonable pavement structure type in permafrost regions: flexible base asphalt pavement structure. The results show that: in the long term, the deformation range of flexible pavement structure is less than the semi-rigid base pavement structure. Therefore, the permafrost region pavement structure should give priority to the flexible base asphalt pavement structure.

Study on Mechanical Properties of Flexible Base Asphalt Pavement in Permafrost Regions