@techreport{oai:kindai.repo.nii.ac.jp:00023377, author = {高野, 保英 and 麓, 隆行 and 河井, 克之}, month = {}, note = {https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19K04626/, 研究成果の概要(和文):X線CTを用いた不飽和珪砂の体積含水率分布と水蒸発量の推定実験から,蒸発量について砂のCT値の平均値,輝度値の積算値から推定できる可能性があることが示された.また飽和させた珪砂を冷凍庫で凍結させ,X線CTで撮影した凍結前,凍結後,融解後の試料の三次元画像に画像相関法を適用して凍結または融解に伴う体積ひずみの三次元分布を計算した結果,凍結・融解前後の土壌内の体積ひずみの鉛直および水平面分布が得られた.さらに硅砂を設置し底面から冷却させ,土壌内部の体積ひずみの計測を連続的に試みた結果,土壌内部の凍結が底面から上方へと進行するにつれて,体積ひずみも上方へ広がっていくことを確認することができた. 研究成果の概要(英文): Experiments using X-ray CT to estimate the volumetric water content distribution and water evaporation of unsaturated silica sand indicated the possibility of Experiments using X-ray CT to estimate the volumetric water content distribution and water evaporation of unsaturated silica sand indicated the possibility of estimating the amount of evaporation from the CT value and the integrated brightness value of the sand. The three-dimensional distribution of volumetric strain due to freezing and thawing was calculated by Digital Volume Correlation to three-dimensional images of saturated silica sand before freezing, after freezing, and after thawing taken by X-ray CT. The time change of the distribution of volume strain in the soil was measured by the three-dimensional images of silica sand cooling from the bottom, and it was confirmed that as the freezing of the soil progressed from the bottom upward, the volume strain also expanded upward., 研究種目:基盤研究(C); 研究期間:2019~2021; 課題番号:19K04626; 研究分野:水文学; 科研費の分化・細目:, application/pdf}, title = {X線CT装置を用いた三次元土壌水分量計測手法の開発と応用}, year = {2021}, yomi = {タカノ, ヤスヒデ and フモト, タカユキ and カワイ, カツユキ} }