Time-prediction of an onset of landslide based on the measurement of multi-directional displacement

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K12855
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Natural disaster / Disaster prevention science
• Research Institution: Kochi University
• Principal Investigator: Sasahara Katsuo 高知大学, 教育研究部自然科学系農学部門, 教授 (90391622)
• Co-Investigator(Kenkyū-buntansha): 吉川 直孝 独立行政法人労働者健康安全機構労働安全衛生総合研究所, 建設安全研究グループ, 主任研究員 (60575140) ; 伊藤 和也 東京都市大学, 工学部, 准教授 (80371095)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 斜面崩壊 / 掘削 / 模型実験 / モニタリング / 変位

Outline of Final Research Achievements

Displacements in 2-D direction were measured on different scale model slopes to evaluate the instability of slopes under excavation based on the measurement of displacements. Displacements parallel and vertical to slope surface, shear strains and vertical displacements were measured in large scale model and small scale model respectively. The ratio of the increase of displacement parallel to the slope to that of displacement vertical to the slope converged to unique value before the failure of large scale model slope, while the ratio of the increase of vertical strain to that of shear strain also converged to constant value before the failure of the small scale model slope. These facts suggest that the ratio of the increase of displacement vertical to the direction of the shear of the slope to that of shear displacement might be able to indicate the instability of the slope under excavation.

Free Research Field

降雨及び土工による斜面崩壊の発生予測。斜面防災工学。地盤工学。