Development of estimation method for liquefaction strength considering aging effect of reclaimed ground

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420478
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Geotechnical engineering
• Research Institution: Nagaoka University of Technology
• Principal Investigator: Toyota Hirofumi 長岡技術科学大学, 工学研究科, 准教授 (90272864)
• Research Collaborator: HARA TADASHI
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 液状化 / 年代効果 / せん断波速度 / 三軸試験 / 砂質土

Outline of Final Research Achievements

Various laboratory tests, which are liquefaction strength, local small strain and static penetration tests, were performed using saturated sand specimens through long-term consolidation to detect any change of mechanical properties induced by long-term consolidation.
The number of cycles to liquefaction for long-term consolidation of Toyoura sand increased gradually from 14 days consolidations. The relation between secant shear modulus and shear strain for long-term consolidation of Toyoura sand changed at longer than 14 days consolidation. The change was that threshold of elastic strain region extended. No obvious change in initial elastic shear modulus of Toyoura sand was observed during long-term consolidation. There was a trend that penetration resistance for long-term underwater curing of Toyoura sand increased from 14 days curing.

Free Research Field

地盤工学