超载对沥青路面的影响

结合交通调查，利用先进的移动式轴重仪对干线公路进行了现场轴重测试，发现高速公路实际的重载化和超载现象比较严重，接触压力普遍超过0．7MPa。运用编写的相关的有限元程序，通过改变车辆荷栽的基本模型，分析了车辆荷载对路面结构的影响和荷载的不均匀性对路面使用性能的影响。结果表明面层的剪应力、基层与底基层底部的拉应力和路基顶部的压应力都随轴载的增加而增长，超载对沥青路面的早期破坏影响严重。

Asphalt pavement stress under overloading

The actual distribution of axle load of main pavements was measured using the movable axle load meter to analyze the extent of overloading, some relative finite element programs were compiled to study the effect of vehicle load on asphalt pavement through changing vehicle load, and the effect of asymmetric load on pavement performances. The results show that the heavy load and overloading vehicles extensively exist throughout China, and tyre pressure is usually over 0.7 MPa, shear stress of surface, stress of base and subbase and pressure stress of subgrade are increasing up when the axle load increases, which indicates that overloading is a main factor of the early destruction of asphalt pavement. 1 tab, 6 figs, 8 refs.