Research on productive environment and effective use of lowland area near Ariake shallow sea

有明浅海沿岸低地生产环境及有效利用研究

• 批准号: 11660246
• 负责人: KOUMOTO Tatsuya
• 金额: $ 2.3万
• 依托单位: Saga University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11660246/
• 关键词: Ariake shallow sea; tidal land; mud sedimentation mechanism; paddy soil; permeability; stabilized box foundation method; soft ground countermeasure; agricultural crawler vehicle; 箱型基礎工方; 沈下制御; 農用履帯型車両

To clarify the phenomena of resuspension and transport of the bottom sediment in shallow sea area, the velocity distribution and the bottom shear stress under combined wave and current condition were analyzed theoretically by a three-layer time invariant eddy viscosity model. Both the failure of bottom mud surface layer and the process of bottom mud resuspension were found to be dependent strongly on the bottom mud movement.The relative Importance and contribution of swelling and dispersion to the hydraulic conductivity of high swelling bentonite and low swelling Ariake clay under various Na-Ca mixed solutions were investigated. The average conductivity for the bentonite mixture was found to decrease drastically and finally become less than 1cm/day and that for the Ca-saturated Ariake clay mixture being also found to decrease during the distilled water leaching.The stabilized box foundation (SBF) method was found to decrease the settlement by 1/2 of that of the slab foundation from the in-situ model tests on the paddy field in Shiroishi town, Saga Prefecture. This effect was also made sure by the F.E.M analysis. Then the SBF was designed to construct for the structure of the JA Shiroishi Rice Seedling Center and confirmed the effectiveness to decrease the settlement.The travel resistance of the rubber crawler during driving was analytically simulated by using the deformation phenomenon of the rubber crawler due to the vertical load of the track rollers. This simulation method was found to be applicable to predict travel resistance by the rolling resistance of the track roller and to estimate the rolling resistance for each track roller arrangement

为了阐明浅海区域底部沉积物的重悬和转运现象，理论上通过三层时间不变的涡流粘度模型分析了速度分布和合并波和电流条件下的底部剪切应力。底部泥浆表面层的故障和底部泥浆的过程都在很大程度上取决于底部的泥浆运动。研究了各种NA-CA混合溶液。发现膨润土混合物的平均电导率急剧下降，最终降低1厘米/天，而对于蒸馏水浸出期间，CA饱和的Ariake Clay混合物也被发现降低。稳定的盒子（SBF）方法是发现可以从Saga县Shiroishi Town的Paddy Field的原位模型测试中减少平板基础的1/2。 F.E.M分析也确保了这种效果。然后，SBF设计为为JA Shiroishi稻幼苗中心的结构构建，并确认了减少沉降的有效性。通过使用橡胶爬行者在驾驶过程中的旅行阻力通过使用橡胶爬行者的变形现象分析模拟。轨道辊的垂直负载。发现这种仿真方法适用于通过轨道辊的滚动阻力预测旅行阻力，并估算每个轨道滚筒排列的滚动电阻

项目成果

M.Koriyama, M.Seguchi and O.Kato: "On the resuspension of Bottom mud in the tidal flat area under the combined wave and current flows."Trans.Jap.Soc.of Irri., Drain.and Reclam.Eng.. 209. 77-85 (2000)

M.Koriyama、M.Seguchi 和 O.Kato：“论波浪和洋流组合作用下潮滩区底部泥浆的再悬浮。”Trans.Jap.Soc.of Irri.、Drain.and Reclam.Eng。

T.Koumoto: "Stabilized Box Foundation Method for Soft Ground"Proc.of Int.Conf.on Geotechnical & Geological Engineering. Vol.2. 415-420 (2000)

T.Koumoto：“软土地基稳定箱基础法”Proc.of Int.Conf.on Geotechnical

藤巻晴行: "移流ランダムウオークモデルによる土壌中の溶質移動の解析"土壌の物理性. 81号. 43-54 (1999)

Haruyuki Fujimaki：“使用平流随机游走模型分析土壤中的溶质运动”《土壤物理学》81 No. 43-54 (1999)。

Lei,F.J.: "Agricultural Drainage"American Society of Agronomy. 1329 (1999)

雷F.J.：“农业排水”美国农学会。

F.J.Leij, N.Toride, and P.-H.Tseng.: "Alternative approaches for modeling solute transport"Agricultural Drainage, Chapter 12, No.38 in the series of Agronomy, American Society of Agronomy. 431-465 (1999)

F.J.Leij、N.Toride 和 P.-H.Tseng.：“模拟溶质运输的替代方法”农业排水，农学系列第 12 章第 38 期，美国农学会。