STUDY ON DISASTER PREVENTION PERFORMACE IMPROVEMENT OF RIVER BANK PROTECTION WHICH DEVERTED RETAINING WALL CONSTRUCTION METHOD
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- WATANABE Katsutosi
- 徳山工業高等専門学校 土木建築工学科
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- OONAKA Nozomu
- 山口大学大学院創成科学研究科建設環境系専攻
Bibliographic Information
- Other Title
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- 土留め壁工法を転用した河川護岸の防災性能向上に関する研究
Description
<p> In this study, in order to improve the disaster prevention performance of the Ganlock bank protection which made practical use of the retaining wall construction method as the river bank protection method, the roughness coefficient of the new Ganlock bank protection which improved the old Ganlock bank protection, the stable estimation against the hydrodynamic force, the characteristics of the flow velocity distribution and the inner flow structure were examined by the hydraulic model experiment and the dynamic model. As a result, it was revealed that the Manning’s roughness coefficient of the new Ganlock bank protection is 0.041, which is larger than that of the old Ganlock bank protection. From the calculation of the dynamical model, the critical velocity for drag and lift was calculated. In the vicinity of the new Ganlock bank protection, a large scale secondary flow was formed as compared with the old Ganlock bank protection, and the effect of reducing the primary mean velocity around the bank protection was recognized. Furthermore, a large and characteristic streameise vorical structure was formed around the new Ganlock bank protection and it was inferred that it contributes to the reduction of the primarry mean velocity and the generation of the secondary flow.</p>
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 75 (2), I_499-I_504, 2019
Japan Society of Civil Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390286426518321536
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- NII Article ID
- 130007940165
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- ISSN
- 2185467X
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed