Construction of soil genome concept for evaluating the geotechnical properties and its engineering benefits

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H04041
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Geotechnical engineering
• Research Institution: National Institute of Maritime, Port and Aviation Technology (2016-2017); Port and Airport Research Institute (2015)
• Principal Investigator: Tanaka Masanori 国立研究開発法人海上・港湾・航空技術研究所, 港湾空港技術研究所, 専門研究員 (20371768)
• Co-Investigator(Kenkyū-buntansha): 渡部 要一 北海道大学, 工学研究院, 教授 (00371758) ; 川口 貴之 北見工業大学, 工学部, 准教授 (20310964) ; 亀井 健史 宮崎大学, 工学部, 教授 (30177597) ; 大河原 正文 岩手大学, 理工学部, 准教授 (80223741)
• Co-Investigator(Renkei-kenkyūsha): OHTSUBO MASAMI 九州大学, 名誉教授 (80112316) ; KATAOKA SATSUKI 神戸大学, 工学研究科, 助教 (50552080)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 土の物理化学的性質 / 粘土鉱物 / 土のせん断強さ / 堆積環境

Outline of Final Research Achievements

The following conclusions were obtained.
1) It was confirmed that the amorphous clays such as Kanto Loam change into soils with clay minerals by Transmission Electron Microscope (TEM). From this result, it was proved that volcanic cohesive clays change into clay minerals under marine environment.2)The friction force and viscosity of the clay particles were measured using an Atomic Force Microscope (AFM), and the friction characteristics and physical properties of the surface of clay particle in the micro region were quantitatively examined. The friction force (micro strength) of the clay unit layer was larger than the shear force (macro strength) obtained from large displacement shear test.3)The sediment volume test is a test to identify the degree of expansivity of clays. We showed that this method can be explained by the balance between diffused electric double layer and van der Waals force.

Free Research Field

地盤工学