Exoerimental study on erosion rate of cohesive sediment and the attempt toward direct measurement of it in revers.

粘性沉积物侵蚀速率的实验研究及其逆向直接测量的尝试。

• 批准号: 14550516
• 负责人: SEKINE Masato
• 金额: $ 1.15万
• 依托单位: Waseda University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550516/
• 关键词: Cohesive sediment; Erosion rate; Erosion mechanism; Erosion rate formula; Portable erosion test; 浸食試験機

The erosion process of soft cohesive sediments, which were deposited naturally on a river bed, is investigated in this study. Extensive series of experiments, conditions of which were set systematically, were conducted to evaluate the erosion rates by running water in a closed conduit. Test samples consisted of a mixture of silica sand, clay and water, the composition of which was set to be a variable. The main factors which govern this process were found be the clay content ratio (the weight ratio of clay to the total sediment), the water content ratio (the weight ratio of water to the clay), and a frictional velocity of flow, a water temperature, the size of silica sand and the dry-wet history. The effects of these parameters on the erosion rate were evaluated quantitatively. The erosion rate formula was also derived on the basis of experimental results. Also, the mechanism of this process was examined and made clear to a certain extent. In addition to these fundamental studies, the portable measuring system of erosion rate in a real river was developed, and a series of measurement was also conducted confirm the validity of this erosion test.

研究了天然沉积的软质粘性泥沙的冲刷过程。通过系统地设定试验条件，进行了一系列的试验，以评价封闭管道中自来水的冲刷速率。测试样品由硅砂、粘土和水的混合物组成，其组成被设置为可变的。控制这一过程的主要因素被发现是粘土含量比（粘土与总沉积物的重量比），水含量比（水与粘土的重量比），和摩擦流速，水温，硅砂的大小和干湿历史。定量地评价了这些参数对冲蚀率的影响。并根据试验结果推导了冲蚀率公式。并在一定程度上探讨了这一过程的机理。在此基础上，研制了真实的河流冲刷率便携式测量系统，并进行了一系列的冲刷试验，验证了冲刷试验的有效性。

项目成果

関根正人, 西森研一郎, 藤尾健太, 片桐康博: "粘着性土の浸食進行過程と浸食速度式に関する考察"土木学会水工学論文集. 第47巻. 541-546 (2003)

Masato Sekine、Kenichiro Nishimori、Kenta Fujio、Yasuhiro Katagiri：“关于粘性土侵蚀过程和侵蚀速率公式的考虑”，日本土木工程学会水利工程学报，第 47 卷，541-546（2003 年）。

M.Sekine, K.Fujio, Y.Katagiri, K.Nishimori: "Erosion rate of choesive sediment by running water in river"Proceedings of the International Conference on Fluvial Hydraulics, RIVER FLOW 2002. Volume 1. 595-601 (2002)

M.Sekine、K.Fujio、Y.Katagiri、K.Nishimori：“河流中流水对选择性沉积物的侵蚀率”国际河流水力学会议记录，RIVER FLOW 2002。卷 1. 595-601 (2002)

関根正人, 西森研一郎, 藤尾健太, 片桐康博: "粘着性土の浸食進行過程と浸食速度式に関する考察"土木学会水工学論文集. 47. 541-546 (2003)

Masato Sekine、Kenichiro Nishimori、Kenta Fujio、Yasuhiro Katagiri：“关于粘性土侵蚀过程和侵蚀速率公式的考虑”水利工程学报，日本土木工程学会 47. 541-546 (2003)。

"Erosion process of cohesive sediment and the effect of dry-wet history."Annual Journal of Hydraulic Engineering, JSCE(in Japanese). Vol.48. 937-942 (2004)

“粘性沉积物的侵蚀过程和干湿历史的影响。”水利工程学报，JSCE（日文）。

関根正人, 西森研一郎, 安藤史紘: "粘着性土の浸食過程とそれに与える乾燥湿潤履歴の影響"土木学会水工学論文集. 第48巻. 937-942 (2004)

Masato Sekine、Kenichiro Nishimori、Fumihiro Ando：“粘性土的侵蚀过程及其干湿历史的影响”，日本土木工程学会水利工程学报，第 48 卷，937-942 (2004)。