柔性基层沥青路面轴载换算方法研究

Study on Conversion Method of Axle Load on Flexible Base Asphalt Pavement

文中结合重载交通实际状况和柔性基层沥青路面的普遍结构形式,考虑柔性基层沥青路面材料的非线性,采用粘弹性有限元法分析重载交通对柔性基层沥青路面路表弯沉的影响,提出了轴载换算指标,得到了柔性基层沥青路面的轴载换算公式。结果表明:柔性基层沥青路面对于重载交通的轴载敏感性小于半刚性基层路面,更能适应我国公路运输中超载超限问题突出的现状。

Combined with the practical situation of heavy-load traffic and the common structure of flexible base asphalt pavement, considering the nonlinearity of flexible base asphalt pavement materials, this paper analyzes the influence of heavy-load traffic on surface deflection of flexible base asphalt pavement with viscoelastic finite element method and puts forward axle load conversion index to get the conversion formula of axle load on flexible base asphalt pavement. The result indicates that flexible base asphalt pavement has less sensitivity to axle load than semi-rigid base pavement under heavy-load traffic, which is more adapted to the current situation of overload and overrun problems in highway transport in our country.