Study on effect of depositional structure on liquefaction behavior of reclaimed ground using dredged sands and procedures for improving liquefaction properties

2014 Fiscal Year Final Research Report

• Project/Area Number: 24360188
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Geotechnical engineering
• Research Institution: The University of Tokyo
• Principal Investigator: KOSEKI Junichi 東京大学, 生産技術研究所, 教授 (30272511)
• Co-Investigator(Renkei-kenkyūsha): MIYASHITA Yukika 東京大学, 生産技術研究所, 技術職員 (20396914) ; NAMIKAWA Tsutomu 芝浦工業大学, 工学部, 教授 (50455151)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 地盤工学 / 液状化 / 埋立て / 堆積構造

Outline of Final Research Achievements

The 2011 East Japan Earthquake Disaster caused widely-spread and extensive liquefaction in Tohoku and Kanto districts, which induced severe damage to roads, houses, industrial facilities and lifeline systems such as sewer pipes. In particular, the extent of damage was significantly larger in the reclaimed sandy soil deposits, which were constructed by tranporting a mixture of dredged sands and water using pumps. By focusing on the special soil particle structure of such deposits, a series of laboratory tests was conducted in this study. As a result, liquefaction properties of specimens having the special soil particle structure could be revealed, which were compared to those having a uniform structure. Effectiveness of the procedures for improving the liquefaction properties was also confirmed. In addition, several new or modified experimental procedures were also established for conducting such test series.

Free Research Field

地盤工学