@article{oai:niigata-u.repo.nii.ac.jp:00028177,
 author = {青山, 清道},
 journal = {新潟大学積雪地域災害研究センター研究年報, 新潟大学積雪地域災害研究センター研究年報},
 month = {Jan},
 note = {It can be observed that Tateshina loam (Nagano prefecture) freeze the surface of the affected ground rises, lifting with it manholes or drainage pipes due to the adfreezing force of soil located above the freezing zone. In order to estimate the amount of adfreezing force of soil, the laboratory model tests for the several kinds of manhole (different types of manhole, different kinds of materials) have been carried out. The results indicate that the behavior of the manhole depends on not only the type but also the kinds of materials. The adfreezing force of soil depends strongly on the roughness surface of manhole. Also, it is found that the relation between thermal conductivity and dry density (or degree of saturation) of soil.},
 pages = {97--102},
 title = {凍着凍上に関する模型実験},
 volume = {6},
 year = {1985}
}