川藏公路柔性加固基层沥青路面结构经济性分析

Economic Analysis on Asphalt Pavement Structure with Flexible Reinforcement Base for Sichuan-Tibet Highway

为减小川藏公路路基在重载和恶劣环境综合作用下产生的不均匀变形,以减缓半刚性基层沥青路面发生破坏。本研究拟通过寿命周期成本分析,按照路基不均匀变形影响程度,采用土工格室加固级配碎石组成柔性加固基层;选取半刚性基层和柔性加固基层沥青路面结构,采用净现值法进行对比分析。结果表明:柔性加固基层沥青路面结构的总费用小于半刚性基层沥青路面结构,可做为川藏公路不均匀变形路段的典型合理路面结构。

In order to reduce the uneven deformation of Sichuan-Tibet highway subgrade under the combined effect of heavy load and harsh environment, and to slow down the damage of semi-rigid base asphalt pavement.Based on the life cycle cost analysis, according to the influence degree of uneven deformation of the subgrade, this study intends to use the geocell to strengthen graded crushed stone to form a flexible reinforced base;The asphalt pavement structures of semi-rigid base and flexible reinforced base are selected, and the net present value method is used for comparative analysis.The results show that the total cost of asphalt pavement structure with flexible reinforced base is less than that of asphalt pavement structure with semi-rigid base, which can be used as a typical and reasonable pavement structure for uneven deformation sections of Sichuan-Tibet highway.