Evaluation of earth structure deterioration due to internal erosion

2017 Fiscal Year Final Research Report

• Project/Area Number: 26289151
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Geotechnical engineering
• Research Institution: The University of Tokyo
• Principal Investigator: Kuwano Reiko 東京大学, 生産技術研究所, 教授 (80312974)
• Co-Investigator(Kenkyū-buntansha): 村上 章 京都大学, (連合)農学研究科(研究院), 教授 (80157742)
• Co-Investigator(Renkei-kenkyūsha): MIZUTANI Takaaki (国研)港湾空港技術研究所, 地盤研究領域, チームリーダー (70371763) ; MORI Hirotoshi 山口大学, 創成科学研究科, 准教授 (20355803) ; KUWANO Jiro 埼玉大学, 大学院理工学研究科, 教授 (30178149)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 土構造物 / 内部侵食 / 劣化

Outline of Final Research Achievements

Field investigation and laboratory tests were conducted to study the mechanism of formation/expansion of subsurface cavities and water pathways in the ground.
It was possible to clarify the cause of sinkholes occured in the real cases, such as multiple sinkholes in Pokhara, Napal and a large scale sinkhole in Miyakonojo, Miyazaki. But it was not possible to detect the water pathway or underground cavities at more than two meter deep, with non-destructive manner. From laboratory tests, stiffness and strength reduction of soil due to suffusion could be quatitatively evaluated to some extent.

Free Research Field

地盤工学