Estimation system about slope stability for rainfall-indused slope failure which consists of ground survey, slope monitoring techniques and numerical simulations

2014 Fiscal Year Final Research Report

• Project/Area Number: 24686056
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Geotechnical engineering
• Research Institution: Kagoshima University
• Principal Investigator: SAKO Kazunari 鹿児島大学, 理工学研究科, 准教授 (20388143)
• Research Collaborator: KITAMURA Ryosuke ; FUKAGAWA Ryoichi ; BUI Ha Hong ; DANJO Toru ; HIRAOKA Nobutaka
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 自然現象観測・予測 / 土砂災害 / 地盤工学 / 地盤調査 / 斜面災害 / 不飽和土質力学 / 降雨 / 斜面安定

Outline of Final Research Achievements

A lot of slope failures were occurred during rainy season in Japan. In order to determine reasonable evacuation criteria for rainfall-induced slope failure, an quantitative estimation system about slope stability for rainfall-induced slope failures was proposed in this project. The system consists of ground survey, slope monitoring techniques and numerical simulations. Firstly, the relationships among precipitation, pore-water pressure in unsaturated ground and slope failure were discussed using results obtained from laboratory experiments and field measurements. the measurement techniques on evaporation from ground surface and pore-water and pore-air pressure in unsaturated ground were then proposed. A slope stability analysis method by considering unsaturated seepage force in unsaturated slope was also proposed.

Free Research Field

地盤工学