Hydraulic Design of Underground Flood way in a Metropolitan Area

某都市圈地下泄洪道水力设计

• 批准号: 07558172
• 负责人: MURAMOTO Yoshio
• 金额: $ 2.11万
• 依托单位: KYOT UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07558172/
• 关键词: Flood Disaster; Underground Floodway; Numerical Hydraulics; Open Channel Flow; Pipe Flow

Hydraulic transients in the underground channel system such as the underground flood way and the sewer network were investigated experimentally and numerically. The typical features of the unsteady flows induced by the inflow discharge into the underground channel are clarified by the fundamental hydraulic experiments. It is also shown that the hydraulic transients with the propagation of an interface between the open channel flow and the pipe flow can be reproduced by using the numerical model. It was pointed out that the form losses of fluid energy at the junction of the main channel and the vertical shafts should be considered to predict the surging phenomena induced by the rapid change of the outflow discharge.Numerical model was extended to predict the interaction between the overland surface flow and the flow in the underground channel., considering the discharge through the manholes.The hydraulic characteristics of vertical drofshaft with tangential vortex-inlet, which is used to let the flood water flow into the underground channel, were also investigated experimentally. The relation between the air entrainment rate and the hydraulic conditions was proposed through the examination of the hydraulic experiments.

对地下洪道和地下管网等地下通道系统的水力瞬变进行了实验和数值研究。通过基础水力试验，阐明了地下通道入流引起的非定常流动的典型特征。数值模型还可以再现明渠流与管道流之间存在界面时的水力瞬态。指出在预测出流量快速变化引起的涌流现象时，应考虑主通道与竖井交界处流体能量形态损失。将数值模型推广到地表水流与地下通道水流相互作用的预测中。，考虑通过沙井的流量。实验研究了用于泄洪的切向涡入口竖井的水力特性。通过对水力试验的分析，提出了带气量与水力条件的关系。

项目成果

細田 尚: "地表流・地下水路流の相互作用を考慮した非定常流解析" 平成9年度土木学会年次学術講演会. (発表予定).

Takashi Hosoda：“考虑地表流与地下通道流相互作用的非定常流分析”1997年日本土木工程学会学术年会（预定报告）。

Hosoda, T., Iwata, M., Muramoto, Y.and Furuhachi, T.: "Hydraulic analysis of undular bore in open channels with circular cross section" Annual Journal of Hydraulic Eng., JSCE. Vol.41. 645-650 (1997)

Hosoda, T.、Iwata, M.、Muramoto, Y. 和 Furuhachi, T.：“圆形横截面明渠中波状孔的水力分析”液压工程年刊，JSCE。

細田 尚: "地下水路系で生じる過渡水理現象の解析法とその応用" 京大・防災研究所年報. 40B-2. 425-432 (1997)

Hisashi Hosoda：“地下水道系统中瞬态水力现象的分析方法和应用”京都大学防灾研究所年度报告40B-2（1997）。

細田 尚: "地下水路系で生じる過渡水理現象に関する2,3の検討" 土木学会水工学論文集. 42(印刷中). (1998)

Takashi Hosoda：“地下水道系统中瞬态水力现象的一些研究”水利工程学报，日本土木工程师学会 42（出版中）。

Toda, K., Inoue, K., Imamoto, H.and Ejiri, T.: "On hydraulic property of vortex flow dropshaft with contraction" Annual Journal of Hydraulic Eng., JSCE. Vol.40. 655-660 (1996)

Toda, K.、Inoue, K.、Imamoto, H. 和 Ejiri, T.：“收缩涡流下降轴的水力特性”，液压工程年刊，JSCE。