| With the rapid development of our social economy and accelerating the urbanizationprocess, urban impervious area and urban road pavement hardening increase rapidly, blockingthe rain infiltration channels, make the runoff coefficient increases year by year, surface watercollection rate is speed up, peak appears in advance, resulting in local urban areas of poordrainage, water even waterlogging, influenced people’s daily life, and even cause seriouseconomic losses. Although our country do a lot of research on urban road pavement drainageand take some measures, but the water problem in the city is still very grim.In order to solve the water problems of urban roads, this paper mainly from the followingthree aspects of urban road surface drainage study based on the existing theory achievement,combining the actual situation of our urban road pavement drainage.（1）Analyze and research the formation process of surface runoff, flow and itscalculation method of Urban rainfall, Comparative analysis the advantages and disadvantagesof various calculation methods and their applicable occasions.（2）Because of the condition that rain into the rain mouth perforated strainer is morecomplex, the current calculation theory is not yet mature. In this paper, according to thehydraulics principle and empirical formula and taking into account the ditches in the inlandwaters flow and slope of roads, Based on analyzing condition of three rain mouth water ofcontinuous slope section to put forward three kinds of water mouth in continuous slopesection of the flow capacity and general theoretical calculation formula of entrapment rate, inthe specification for the rain mouth distance only gives the experience reference range, did notexplicitly put forward the specific calculation method, In this paper, we analyze the rainmouth detailed theoretical calculation method and its layout way in the intersection.（3）Based on the improvement of urban road pavement drainage, this article analysesthe urban road respectively of road profile, flat vertical surface combination, cross-sectional,median, green belts, linear displacement, impervious surface, wear under the overpassdrainage design to put forward the corresponding improvement method and the improvementmeasures, to alleviate urban road seeper problem. |
