| Prototype observation study on roughness coefficient of bag concrete composite section lining channel |
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| DOI：10.7606/j.issn.1000-7601.2019.05.06 |
| Key Words: mold bag concrete composite section lining channel roughness coefficient prototype observation error analysis |
| Author Name | Affiliation | | ZHAI Dong-han | College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling, Shaanxi 712100, China | | HE Wu-quan | College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling, Shaanxi 712100, China
The Ministry of Education Key Laboratory of Agricultural Water and Soil Engineering, Yangling, Shaanxi 712100, China | | LAI Hong-bing | Ministry of Water Resources of the People's Republic of China, Beijing 100053, China | | LOU Zong-ke | College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling, Shaanxi 712100, China | | HUO Yi-zhen | Hetao University, Bayan Nur City， Inner Mongolia 015000， China |
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| Abstract: |
| In order to determine the roughness coefficient of the composite section channel of the concrete bag slope protection and sand gravel bottom protection, in this paper Shiba sub-channel （0+200~2+216）and Jianshe sub-channel (9+903) of Hetao irrigation area were selected to conduct the prototype observation experimental research of roughness coefficient of formed concrete composite section lining channel. The channel roughness coefficient under different water depths and flow rates were obtained. And the function relationship between the cross section hydraulic measurement error and the roughness calculation error were established. The results showed that, the minimum roughness coefficient of Shiba sub-channel prototype observation was 0.025 1，the maximum value was 0.0267 and the average value was 0.0259； the minimum roughness coefficient of Jianshe sub-channel prototype observation was 0.026 4，the maximum value was 0.0279 and the average value was 0.0272. The maximum roughness coefficient error of Shiba sub-channel prototype observation was 5.037% and the maximum roughness coefficient error of Jianshe sub-channel prototype observation was 4.305%. The range of roughness coefficient of bagged concrete full cross section lining channel was 0.0251~0.0279，the average value was 0.0265 and the maximum roughness coefficient error was 5.037%. |
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