Risk evaluation and early warning for slope disaster induced by earthquake and rainfall

2016 Fiscal Year Final Research Report

• Project/Area Number: 25303015
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 海外学術
• Research Field: Geotechnical engineering
• Research Institution: Saitama University (2016); The University of Tokyo (2013-2015)
• Principal Investigator: UCHIMURA Taro 埼玉大学, 理工学研究科, 准教授 (60292885)
• Co-Investigator(Kenkyū-buntansha): 古関 潤一 東京大学, 工学(系)研究科(研究院), 教授 (30272511) ; 桑野 玲子 東京大学, 生産技術研究所, 教授 (80312974) ; 東畑 郁生 関東学院大学, 理工学部, 客員教授 (20155500)
• Research Collaborator: NISHIE Shunsaku 中央開発株式会社, 技術センター長 ; WANG Lin 中央開発株式会社, 技術センター ; QIAO Jian-Ping 中国科学院, 成都山地災害与環境研究所, 教授 ; YANG Zongji 中国科学院, 成都山地災害与環境研究所, 研究員 ; HUANG Dong 中国科学院, 成都山地災害与環境研究所, 研究員 ; HUANG An-Bing 台湾・国立交通大学, 土木工学科, 教授 ; LU Chin-Wei 台湾・高雄第一技術科学大学, 准教授
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 斜面災害 / 地震 / 降雨 / 現地調査 / モニタリング / 早期警報

Outline of Final Research Achievements

Slope disasters caused by heavy rainfall after strong earthquake are studied in cooperation among research groups from China, Taiwan, and Japan. Slopes in mountanious areas are often damaged with cracking and deformation by strong seimic events. Even in case they are not failed, they may be less durable against heavy rainfall than before the eathquake. To take care of such cases, following studies are conducted:
1) Mechanism of slope weakening due to strong earthquakes are discussed, and methods of risk evaluation are developed based on results from case studies, monitoring with sensors on site, and model/site experiments.
2) Low cost and simple monitoring and early warning equipments for slope failures are developed to reduce the risk of disasters. In addition, new methods as like multi-points monitoring and monitoring based on changes in elastic wave propagation through the surface layer are studied.

Free Research Field

地盤工学