Liquefaction damage potential evaluation based on density index considering the genuine compressibility of soil material during the earthquake

2016 Fiscal Year Final Research Report

• Project/Area Number: 15H06028
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Geotechnical engineering
• Research Institution: Tohoku University
• Principal Investigator: Kim Jongkwan 東北大学, 工学研究科, 助教 (90757733)
• Project Period (FY): 2015-08-28 – 2017-03-31
• Keywords: 液状化 / 最小間隙比

Outline of Final Research Achievements

In this study, liquefaction assessment based on a new density index considering the genuine compressibility, namely cyclic minimum void ratio, of soil material during the earthquake was performed. First, a simplified cyclic shear box was developed to make easy to obtain the cyclic minimum void ratio acquired from the repetition of liquefaction and drainage, and a simple procedure for cyclic minimum void ratio was established. In addition, liquefaction resistance was evaluated based on the margin of void ratio which obtained from the cyclic minimum void ratio has been tried. The results showed the possibility of the simple estimation of liquefaction resistance using the margin of void ratio as a density index, and it was also found that the density index can be applied to the materials from sand to intermediate soil regardless of the type of material.

Free Research Field

地盤工学