@article{oai:niigata-u.repo.nii.ac.jp:00028297,
 author = {森井, 俊広 and 小越, 将仁 and 鈴木, 哲也 and 河合, 隆行},
 issue = {1},
 journal = {新潟大学農学部研究報告, 新潟大学農学部研究報告},
 month = {Oct},
 note = {フローティングタイプの頭首工の安定性は、固定堰下の河床砂礫を通過する浸透流による動水こう配と揚圧力分布に支配される。河床砂礫を通過する浸透流を予測するためには、その透水性を適切に評価しなければならない。しかし、河床砂礫は、最大粒径が数百mm におよぶことから、通常のφ50あるいはφ100mm のモールドを用いた透水試験ではその透水性を測定することは難しい。本研究では、大粒径粒子を含む河床砂礫の透水性の試験法を提案し、測定した透水係数に基づき、固定堰下で生じる浸透特性（動水こう配と水圧の分布）を調べるとともに、河床砂礫の透水性を規定する因子（粒径）について考察する。, Hydraulic stability of river weirs (head works) is dominated by hydraulic gradient and uplift pressure caused by seepage flow through riverbed sediment under the weir. To predict the seepage flow through the riverbed sediment, permeability or transmissibility of the riverbed sediment consisting of sand and gravel should be measured properly. As the riverbed sediment includes usually large gravel particles a few hundred millimeters in diameter, it is difficult to use the usual permeability test equipment employed in the usual soil tests to measure coefficient of permeability. In this paper, a new permeability test which employs laboratory water flume test together with numerical parameter estimation is proposed. The coefficient of permeability of the riverbed sediment is determined by the proposed permeability test, and the seepage flow through the riverbed sediment is calculated by numerical non-linear seepage analysis to investigate the hydraulic gradient and the uplift pressure under the base of the base floor. Finally, a hydraulic mean radius of the riverbed sediment is estimated from the coefficient of permeability measured, and is related to grain size distribution of riverbed sediment in order to show the particle size of sand or gravel which dominantly determines the permeability of the riverbed sediment.},
 pages = {49--55},
 title = {河床砂礫の透水性の測定とそれに基づく浸透特性の評価},
 volume = {66},
 year = {2013}
}