Research On Performance Of Porous Asphalt Pavement And Its Perfect Area-proportion In The Urban Land Planning

Decline of water table and collapse of ground surface are caused because usual pavement blocks the alimentation of groundwater. The collection of rain not only harms the safety of vehicle-running but also increases the pollution of drain. Usual pavement brings serious troubles to environment and causes urban heat island .Because the normal pavement generate some hazard, porous pavement is suggested in large cities to betterment the traveling condition and ecological environment. The paper has researched the porous asphalt pavement's structure design and service performance. Optimum scale of porous asphalt pavement in city land planning is also designed.In the mixture-ratio design of porous asphalt pavement, a sort of method based on aim porosity is put forward in this paper. When make sure the optimum asphalt content in the mixture, we adopt the conjoint way of Marshall compaction and asphalt thickness test, which can meet the demand of porous asphalt pavement. In the structure design, two standards are used to control thickness design. The flexure standard can be used in the design, and pervious thickness can be used to check up.In the study of service performance, emphasize on researching the porous capability and intension of porous pavement and their relation between pavement structure; base on this, research the ecotope benefit of porous asphalt pavement in evaporate -cooling and denoising, it can provide reference of extending the using of porous asphalt pavement.Finally, for making sure the optimum scale of porous asphalt pavement in city land use structure, multi-objective optimizing model which based on city land use economy-benefit, ecotope benefit and society benefit is set up. This model is settled with genetic algorithm and use the VC program to analize the example.