@article{oai:kitami-it.repo.nii.ac.jp:00007671,
 author = {中村, 大 and 後藤, 隆司 and 伊藤, 陽司 and 山下, 聡 and 川口, 貴之 and 山崎, 新太郎 and 鈴木, 輝之 and 河野, 勝宣},
 issue = {9},
 journal = {journal of the Mining and Materials Processing Institute of Japan},
 month = {Aug},
 note = {Frost heave in rocks is caused by the frost heave pressure (pore ice pressure) generated by the freezing of pore water, which then cracks the rock. <BR>The present work attempts to clarify the frost heave pressure of rocks by experiments at four temperature conditions. <BR>Ohya tuff and Kimachi sandstone, in which the occurrence of frost heave has previously been confirmed, were used as specimens.<BR>Measurements of these experiments were the internal temperature of the rocks during the freezing process and the location where the ice lens formed.<BR>These two parameters made it possible to determine the temperature of the location where the ice lens formed. <BR>A generalized Clausius-Clapeyron equation was used to calculate the pore ice pressure. <BR>The results indicated that the temperature at the location of ice lens formation depends on the types of rock, but not on the temperature gradient during freezing.<BR>It was also confirmed that frost heave in rocks with a higher tensile strength appears at locations with a lower temperature, while that in rocks with a lower tensile strength appears at location of temperatures close to 0°C.<BR>These findings suggest that the location and temperature of the ice lens formation are dependent on the strength of the rock.},
 pages = {558--564},
 title = {岩石の凍上圧に関する基礎的研究 : 岩石の凍上発生位置の強度依存性},
 volume = {127},
 year = {2011}
}