透水沥青路面的排水能力验算与结构改进

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

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。

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.