涵洞、通道上的沥青混凝土路面结构

Structure of asphalt-concrete-pavement over culvert or underpass

针对涵洞、通道上沥青混凝土路面的病害现象 ,应用数值和实验方法 ,详细地研究了其结构性能。当填土高度大于 1 .0 m后 ,构造物对路面的影响可以不计。增加面层和基层的厚度以及提高基层的模量 ,可以降低面层的拉应力。将填土材料用基层材料置换 ,可以大大改善路面的结构性能。

Aiming at the subsidence and crack of asphalt-concrete-pavement over the culvert or underpass,the structure properties are studied by the numeric method and experiment method.When the height of filled soil is higher than 1.00 m, the effect of the structures on pavement structure can be ignored. With the increase of the thickness of facing h 1 and the thickness of subbase h 2, and modulus of subbase, the value of σ bm decreases. If the soil on both sides of structure is replaced by material of the subbase, the pavement performance will be enbanced apparently.