透水沥青路面的排水能力验算与结构改进

针对上海及江浙地区的降雨情况，选取典型沥青路面结构进行了透水沥青路面的排水能力验算，发现设计空隙率达到18％以上，有效空隙率达到80％的透水沥青路面一般均能满足非冰冻地区路面大雨时不积水的要求，因此不需要设置另外的排水沟管等设施。从维护透水沥青路面的长期性能出发，应注意结构上的防水和排水。城市道路中铺设透水沥青表面层时，建议采用特制的透水平石，加快水流的排放。

Checking Calculation on Drainage Ability of Porous Asphalt Pavement and Modified Structure

This paper calculates the drainage ability of typical porous asphalt pavements in Shanghai,Jiangshu and Zhejiang zones,and concludes that the porous asphalt pavements which contain over 18% design void and up to 80% effective void usually are enough to meet drainage requirements in non-frost zones when heavy rain,therefore additional drainage ditchs or pipes needn't be laid.Howev- er,as far as the long-term performance of porous asphalt pavements be concerned,it should be paid attention to water proof and drainage of pavement structure.The paper recommends a porous flush curb in city porous asphalt pavement to rapidly drain.