| 均匀入流沟渠的流量与沿程水深变化规律 |
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| 引用本文： | 夏艳辉,王建龙,王文海,赵梓轩,杨峰. 均匀入流沟渠的流量与沿程水深变化规律[J]. 环境工程, 2022, 40(1): 8-12+20. DOI: 10.13205/j.hjgc.202201002 |
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| 作者姓名： | 夏艳辉 王建龙 王文海 赵梓轩 杨峰 |
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| 作者单位： | 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; |
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| 基金项目： | 国家水体污染控制与治理科技重大专项(2017ZX07103-002)； |
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| 摘 要： | 近年来,在城市建设过程中,广场、公园、城市道路等区域大量采用线性排水沟或缝隙排水,有沿程入流的沟渠为非均匀流,因此,在上述排水方式中普遍采用的谢才公式计算方法会产生较大误差。针对上述问题,采用物理模型方法,研究了沿程均匀入流对明渠恒定流水面曲线的影响,提出了不同坡度、渠底宽度和壁面粗糙度条件下的水面曲线,并与谢才公式计算结果进行了比较。结果表明:在各实验工况条件下有沿程入流时,沟渠内水面曲线均沿程增加,与谢才公式计算结果有明显差异,并进一步拟合出流量-水深的计算关系公式。上述研究成果对研究和优化道路边沟、线性排水等沿程均匀入流沟渠的水力断面设计计算具有重要意义。
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| 关 键 词： | 明渠 沿程入流 非均匀流 水面曲线 |
| 收稿时间： | 2021-04-12 |
VARIATION CHARACTERISTICS OF FLOW RATE AND WATER DEPTH IN DITCHES WITH UNIFORM INFLOW |
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| XIA Yanhui,WANG Jianlong,WANG Wenhai,ZHAO Zixuan,YANG Feng. VARIATION CHARACTERISTICS OF FLOW RATE AND WATER DEPTH IN DITCHES WITH UNIFORM INFLOW[J]. Environmental Engineering, 2022, 40(1): 8-12+20. DOI: 10.13205/j.hjgc.202201002 |
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| Authors: | XIA Yanhui WANG Jianlong WANG Wenhai ZHAO Zixuan YANG Feng |
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| Affiliation: | 1. Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education), Beijing University of Civil Engineering and Architecture, Beijing 100044, China;2. Beijing Advanced Innovation Center for Future Urban Design, Beijing 100044, China |
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| Abstract: | In recent years, in view of the fact that the flow along the ditch is non-uniform flow for linear drainage pipe of stormwater runoff, application of Chézy's formula will bring large errors when applied to engineering design. The experimental physical model method was adopt to investigate the effect of the inflow along the way on the constant flow surface curve of the open channel. Meanwhile, the water level was measured by the piezometer, the effect of water surface curve under the conditions of different slopes, width of ditch bottom and wall surface roughness was investigated, and compared with the calculation results by Chézy's formula. The results showed that the water surface curve in the ditch increased along the way when there was inflow along the flow way under different experimental conditions, which was obviously different from the calculation results by Chézy's formula, and the calculation relationship between flow rate and water depth was further fitted. These results will significantly contribute to optimize the design and calculation of the hydraulic cross-section of the even inflow ditches along the road such as side ditches and linear drainage system. |
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