Theory of Attenuation Coefficient m in Urban Storm Sewer System Design
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摘要: 针对中国室外排水设计规范沿用原苏联采用了折减系数m修正汇水时间设计雨水管渠的方法,详细分析了采用m后,不同的城市暴雨强度公式地方参数b和n、地面汇水时间t1、管内汇水时间t2对计算设计流量Qm/Q0的影响.研究发现Qm/Q0是b的增函数,是n的减函数,是t1的增函数,是t2的减函数.由于采用了m严重影响到城市暴雨强度公式的适用范围,根据不同的t1,t2的适用范围缩小到57.5~52.5 min.根据北京市城市暴雨强度公式分析发现,采用m后可以使设计流量缩小40%~50%.Abstract: The code for design of outdoor wastewater engineering in China follows the storm sewer system design method of the former Soviet Union,using attenuation coefficient m for amending the catchment concentration time.In view of the method,the paper analyzes that different urban storm intensity formula parameters b, n and surface catchment concentration time t1,flow time t2 in pipes have impact on the design flow Qm/Q0 after using the attenuation coefficient m.The research finds out that Qm/Q0 is an increasing function of b and t1,and a decreasing function of n and t2.The suitable scope of urban storm intensity formula has been severely affected as a result of using the attenuation coefficient m.Depending on the different surface catchment concentration times,the suitable scope of design flow time t2 in pipes has reduced to 57.5-52.5min.According to the urban storm intensity formula of Beijing,after using attenuation coefficient m,the design flow has reduced 40%-50%.
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Keywords:
- city /
- storm sewer system /
- attenuation coefficient
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[1] ASHLEY R M,BALMFORT D J,SAUL A J,et al.Flooding in the future-predicting climate change,risks and responses inurban areas[J].Water Science and Technology,2005,52(5):265-273.
[2] TDES Sule,YILMAZ Gültekin.Evaluation of relationship of spatial planning-georisks and urban risk analysis:the case studyof Bartin[J].Gazi University Journal of Science,2009,22(4):395-411.
[3] LI Wei-feng,CHEN Qiu-wen,MAO Jing-qiao.Development of 1D and 2D coupled model to simulate urban inundation:anapplication to Beijing Olympic Village[J].Chinese Science Bulletin,2009,54(9):1613-21.
[4] MAILHOT Alain,DUCHESNE Sophie.Design criteria of urban drainage infrastructures under climate change[J].Journal ofWater Resources Planning and Management,2010,136(2):201-208.
[5] FUREY S G,LUTYENS B C.Developing an integrated water management strategy to overcome conflicts between urbangrowth,water infrastructure and environmental quality:a case study from Ashford,Kent[J].Water and Environment Journal,2008,3,22(1):42-53.
[6] OPRITA R.Risks influences on the built environment[C]∥Proceedings of the WSEAS International Conference.InternationalConference on Risk Management,Assessment and Mitigation(RIMA 2010),Bucharest,April 20-22,2010:205-209.
[7] THIERRY Leviandier,SYLVAIN Paypaudeau.A metamodel for stormwater detention basins design[J].Water Science andTechnology,2007,56(12):37-44.
[8] BEIGHLEY Edward,KARGAR Maryam,HE Yi-ping.Effects of impervious area estimation methods on simulated peakdischarges[J].Journal of Hydrologic Engineering,2009,14(4):388-398.
[9] BEAZANT Gareth.Planning for the worst[J].Professional Engineering,2005,18(2):22-23.
[10] 汪明明.雨水池设计理论研究[D].北京工业大学建筑工程学院,2008:80-85.WANG Ming-ming.The theoretical research on design of rainwater tanks[D].College of Architecture and Civil Engineering,Beijing University of Technology,2008:80-85.(in Chinese) [11] 邓培德.雨水沟道容量平衡调节法设计流量的研究[J].土木工程学报,1983,15(1):63-74.DENG Pei-de.A study on the design flow of storm water sewers by method of balance capacity[J].China Civil EngineeringJournal,1983,15(1):63-74.(in Chinese) [12] 孟昭鲁,曲祥瑞.关于q=A-(t+b)-n型暴雨强度公式雨水管渠空隙容量利用的讨论[J].土木工程学报,1983,15(1):75-87.MENG Zhao-lu,QU Xiang-rui.On the storage effect of free space in storm sewers[J].China Civil Engineering Journal,1983,15(1):75-87.(in Chinese) [13] 北京市市政设计院.城市雨水沟管空隙容量的利用[J].土木工程学报,1983,15(1):91-101.Beijing Municipal Engineering Design Institute.On the storage effect of free space in municipal storm sewers[J].China CivilEngineering Journal,1983,15(1):91-101.(in Chinese) [14] 上海市市政设计院.GB50014—2006室外排水设计规范[S].北京:标准出版社,2006.
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