@article{oai:setsunan.repo.nii.ac.jp:00001436,
 author = {山本, はいか and 伊藤, 譲 and YAMAMOTO, Haika and ITO, Yuzuru},
 issue = {1},
 journal = {摂南大学　融合科学研究所論文集, Bulletin of the Transdisciplinary and Interdisciplinary Science Research Institute, Setsunan University},
 month = {Feb},
 note = {The purpose of this study is to assess the permeability of unfrozen part of the freezing earth wall. When the  ground freezes, an ice lens is generated, and the ground is divided into frozen soil and unfrozen soil with  this ice lens as the boundary. If the frozen earth wall is maintained for a long period of time, shrinkage cracks  may occur due to dehydration consolidation of unfrozen soil, and groundwater can flow into the unfrozen  soil generating water supply that bypasses the frozen earth wall. In this study, the coefficient of vertical  permeabilities along the ice lens before, during, and after freeze-thaw were experimentally investigated.  Using the hydraulic conductivity kp obtained in the standard consolidation test, the relational expression  between the void ratio and the coefficient of permeability was obtained. As a result, the coefficient of  permeability of the frozen-thawed soil was greater than that in the unfrozen state. In particular, the  permeability after thawing was the greatest among them. The measured coefficient of permeability was much  greater than the estimated coefficient of permeability from a consolidation test. Comparing the estimated coefficient of permeability with the measured value, it was 2 times greater in the unfrozen soil part during  freezing and 100 times in the frozen-thawed soil. The reason why the measured coefficient of permeability was greater than the estimated value is, we suppose that the invisible shrinkage cracks generated in the  freeze-thaw tests works as the water paths.},
 pages = {85--91},
 title = {凍土遮水壁における凍土-未凍土境界部分の透水係数},
 volume = {7},
 year = {2022},
 yomi = {ヤマモト, ハイカ and イトウ, ユズル}
}