雨水口设计中的几个重要问题及改进建议  

Several Major Issues and Recommendations in Storm Drain Inlet Design

作　　者：王淇[1] 边静[2] 李俊奇[1] 

机构地区：[1]北京建筑大学城市雨水系统与水环境省部共建教育部重点实验室,北京100044 [2]北京经济技术开发区城市规划和环境设计研究中心,北京100176

出　　处：《中国给水排水》2014年第2期27-30,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2010ZX07320-002)

摘　　要：《室外排水设计规范》(GB 50014—2006,2011年版)提高了排水管道设计重现期标准,补充了应校核排水系统排除地面积水的规定。雨水口作为重要的管网附属构筑物,也应注意其设计排水能力的相应提高,保证服务区域内的径流水量快速排放。通过对雨水口数量、边沟横坡、雨水口位置及其高程等影响雨水口排水能力的几个重要因素进行分析,以北京为例,给出了典型路幅宽度机动车道在相应重现期下雨水口数量的设计建议值;提出了复合横坡的设置可在有效增加箅上水深的同时减小道路横向淹水宽度;计算分析了道路绿化带中雨水口高程对径流水量削减效果的影响。该研究结果可为新建区雨水系统设计和旧城区雨水系统提标改造提供参考。Code for Design of Outdoor Wastewater Engineering （ GB 50014 - 2006 ） （ 2011 edi- tion） improved the recurrence interval which is the design standard for drainage pipes and supplemented that the drainage capacity of urban drainage systems should be checked. The design drainage capacity of storm drain inlet which was an important ancillary structure of drainage pipes also should be increased correspondingly to ensure that road runoff within the catchment area could drain away rapidly. Through the analysis of several important issues which affect drainage capacity of storm drain inlet, such as num- ber of inlets, cross slope, location and elevation of inlets and so on, the recommended design numbers of inlets on the motor vehicle lanes with typical road width in different return periods in Beijing were given; the conclusion was proposed that composite cross slope should be set which could effectively increase the water depth on the inlet grate and reduce the spread width ; the effects of the elevation of storm drain in- lets in road green belt on runoff reduction were computed and analyzed. The results could provide refer- ences for the design of stormwater systems in new districts and the upgrading reconstruction of stormwater systems in the old districts.

关 键 词：雨水口 泄水量 复合横坡 

分 类 号：TU992[建筑科学—市政工程]