Elucidation of phenomena about liquefaction of body of embankment considering mechanical characteristics of unsaturated soil

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K18111
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Geotechnical engineering
• Research Institution: Railway Technical Research Institute (2016-2017); The University of Tokyo (2015)
• Principal Investigator: Matsumaru Takaki 公益財団法人鉄道総合技術研究所, 構造物技術研究部, 主任研究員 (00425927)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 不飽和土 / 液状化 / 盛土 / 繰返し載荷試験 / 構成式 / 水分特性曲線 / 数値解析 / 対策工

Outline of Final Research Achievements

In recent earthquakes, several damages were caused due to the occurrence of the liquefaction in the body of embankments. In these damages, the water level was often located in the body of embankment. However, the mechanism of the damages have not been clarified and the effective countermeasure methods have not been established. In this research, unsaturated cyclic loading tests of embankment materials were conducted and the numerical technique was developed, in order to establish the method for the evaluation of liquefaction of body of embankment. Furthermore, the effect of the countermeasure method and the influence of the water content before earthquake to the occurrence of the liquefaction were examined by use of the developed numerical technique.

Free Research Field

地盤工学