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清华大学学报(自然科学版)  2018, Vol. 58 Issue (10): 906-913    DOI: 10.16511/j.cnki.qhdxxb.2018.22.041
  水利水电工程 本期目录 | 过刊浏览 | 高级检索 |
道路在城市排涝中的作用及影响因素定量评价
吕恒, 倪广恒, 曹雪健, 田富强
清华大学 水沙科学与水利水电工程国家重点实验室, 北京 100084
Quantitative evaluation of the role of roads in urban drainage and its influencing factors
LYU Heng, NI Guangheng, CAO Xuejian, TIAN Fuqiang
State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
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摘要 道路在城市超标雨水排除中有着重要作用。该研究构建了强化汇流过程的精细城市雨洪模型(REDUS),以清华园南门主干道和东门主干道为对象,评价了典型暴雨情景下道路的排涝作用,以及降雨、道路纵坡和地下管网条件的影响。结果表明:在北京“721”暴雨中,道路排涝流量占比峰值达到了50%,在管网达到最大排水能力后,道路排涝占比显著增大;道路排涝作用受降雨的影响显著,与最大30 min累积降雨量之间有较好的相关关系;对于配有支路管网的道路,其排涝效果并不随着纵坡坡度单调提升,表明道路纵坡的影响与地下管网结构有关。该研究结果为海绵城市建设中如何充分考虑道路排涝作用提供了科学依据。
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吕恒
倪广恒
曹雪健
田富强
关键词 城市水文暴雨洪水管理道路行泄通道定量评价海绵城市    
Abstract:Urban roads are very important for draining excessive rainfall. A routing-enhanced detailed urban stormwater model (REDUS) is developed, and two main roads in the Tsinghua University campus are selected to evaluate how well the road system enhances drainage during typical storms and to quantify the impacts of rainfall type, road longitudinal slope and underground pipe systems. The results show that for the Beijing "721" stormwater event, the roads can drain as much as 50% of the total flooding discharge and the drainage increases dramatically when the pipe network reaches its maximun drainage capacity. The road drainage effectiveness is sensitive to the rainfall characteristics with the drainage correlating well with the maximum 30-min rainfall volume. Branch pipe networks do not continually increase the road drainage effectiveness as the road longitudinal slope increases which indicates that the road flows are closely connected to the flows in the underground pipes. The results will facilitate construction of Sponge City that effectively incorporates the road drainage.
Key wordsurban hydrology    stormwater management    road    discharge channel    quantitative evaluation    Sponge City
收稿日期: 2018-03-26      出版日期: 2018-10-17
基金资助:科技部国际合作专项(2013DFG72270)
通讯作者: 倪广恒,教授,E-mail:ghni@mail.tsinghua.edu.cn     E-mail: ghni@mail.tsinghua.edu.cn
引用本文:   
吕恒, 倪广恒, 曹雪健, 田富强. 道路在城市排涝中的作用及影响因素定量评价[J]. 清华大学学报(自然科学版), 2018, 58(10): 906-913.
LYU Heng, NI Guangheng, CAO Xuejian, TIAN Fuqiang. Quantitative evaluation of the role of roads in urban drainage and its influencing factors. Journal of Tsinghua University(Science and Technology), 2018, 58(10): 906-913.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2018.22.041  或          http://jst.tsinghuajournals.com/CN/Y2018/V58/I10/906
  图1 两条道路与观测点的位置及道路 管网结构
  图2 强化汇流过程的精细城市雨洪模型(REDUS)框架
  图3 流量和积水验证结果(2017G08G12场次)
  表1 降雨场次特征
  图4 多纵坡条件下的道路纵剖面
  图5 3场典型暴雨情景下的道路排涝流量占比
  图6 “721”暴雨情景下的道路积水深
  图7 道路排涝总量占比与最大时段累积 降雨量的相关关系
  表2 北京市设计暴雨情景下的道路排涝总量占比
  图8 “721”暴雨情景下纵坡对于道路排涝 总量占比的影响
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