Evaluation of deformation and fluidization properties of liquefied soils - Development to the second stage liquefaction research

2014 Fiscal Year Final Research Report

• Project/Area Number: 23246086
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Geotechnical engineering
• Research Institution: Tohoku University
• Principal Investigator: KAZAMA Motoki 東北大学, 工学(系)研究科(研究院), 教授 (20261597)
• Co-Investigator(Kenkyū-buntansha): TOBITA Yoshio 東北学院大学, 工学部, 教授 (40124606) ; YAMAGUCHI Akira 東北学院大学, 工学部, 教授 (30337191) ; NAKAMURA Susumu 日本大学, 大学院工学研究科, 教授 (40307806) ; SENTO Noriaki 日本大学, 大学院工学研究科, 准教授 (40333835) ; UZUOKA Ryosuke 徳島大学, 大学院ソシオテクノサイエンス研究部, 教授 (40333306) ; TOYOTA Hirofumi 長岡技術科学大学, 工学部, 准教授 (90272864) ; MORITA Toshikazu 群馬工業高等専門学校, 環境都市工学科, 准教授 (10353236)
• Co-Investigator(Renkei-kenkyūsha): UNNO Toshiyasu 宇都宮大学, 大学院工学研究科, 准教授 (50570412)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: 液状化 / 流動性 / 最小間隙比 / 液状化試験法 / 流動性評価法 / 構成側 / 要素試験 / 間隙水の移動

Outline of Final Research Achievements

New element test being able to evaluate liquefaction process, and deformation property and ductility nature of the liquefied soils is proposed. Minimum void ratio after cyclic shear applied was studied experimentally for various soils containing the fine contents. It was made clear that the soils containing the larger amount of fines have the higher compressibility and the smaller stiffness recovery during the shearing after liquefaction. Furthermore, shear deformation property of soils under volume change condition is studied. Results described above are the results obtained from element test studies. Vane-shear testing apparatus and new drum-type fluidization testing apparatus were developed for evaluating the fluidization property as a laboratory investigation apparatus. Furthermore, elastoplastic constitutive model to represent from the limited residual deformation to brittle failure continuously was studied.

Free Research Field

地盤工学