地盤性状変化を考慮した海岸道路の後浜斜面の高波による破壊メカニズムの解明 [in Japanese] AN EXPERIMENT TO ELUCIDATE THE MECHANISMS BEHIND HIGH-WAVE-RELATED FAILURE OF BACKSHORE SLOPES ON COASTAL ROADS IN CONSIDERATION OF CHANGES IN GROUND PROPERTIES [in Japanese]
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In this study, on-site surveys based on reports of damage to backshore slopes on coastal roads along the Sea of Okhotsk in Hokkaido were conducted, and an embankment fracture experiment with model high waves was performed in consideration of the survey results. In the experiment, ground with varying relative density and vane shear strength was used to simulate various states of soil suction dynamics. The results highlighted the collapse phenomenon that occurs when soil suction is reduced by high waves on a partially saturated and loosened slope, and scouring caused by high waves was observed on a partially saturated slope with medium-to-high density. The patterns of coastal road damage that follow changes in the relative density and degree of saturation seen in the field soils were clarified, and the mechanism behind high-wave-related failure on coastal roads was elucidated in relation to changes in soil properties. The volume of backshore slope collapse was also found to depend on the relative density and degree of saturation of the slope's soil.
- Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 72(2), I_1189-I_1194, 2016
Japan Society of Civil Engineers