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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Proposal of a Method to Easily Understand Rainfall Infiltration in Railway Embankments
Takashi Nakayama1, Tadashi Hara2 and Keigo Koizumi3
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DOI:10.17265/1934-7359/2024.06.001
1. C. S. Inspector Co., Ltd., 2-7-2 Nambanaka Naniwa-Ku Osaka-Shi, Osaka-Fu 556-0011, Japan
2. Research and Education Faculty, Kochi University, 2-5-1 Akebonocho Kochi-Shi, Kochi-Ken 780-8072, Japan
3. Earth Watch Institute, Inc., 8-10 Toyotsucho Suita-Shi, Osaka-Fu 564-0051, Japan
Slope failures due to heavy or prolonged rain have been occurring frequently in Japan in recent years. In railway embankments, even small-scale surface collapse can result in track deformation. Currently, train operation during rainy periods is regulated according to empirical rules based on rainfall and disaster history. However, the validity of operation regulations is lacking because the rainfall infiltration circumstances inside the slope are unknown. We have been attempting to understand rainfall infiltration in railway embankments by applying a method of predicting surface collapse from observations of volumetric water content in the soil. We used previous field monitoring and model experiments to propose a method for easily understanding the state of rainfall infiltration in the surface layer of an embankment using the relative history of volumetric water content at different depths. In this study, we applied this simple determination method to railway embankments with different topography and geological environments to demonstrate the versatility of the method.
Railway embankments, field monitoring, volumetric water content.
Journal of Civil Engineering and Architecture 18 (2024) 261-268 doi: 10.17265/1934-7359/2024.06.001
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