2010 Fiscal Year Final Research Report

The study on mechanical evaluation of shallow type methane hydrate ground.

Research Project

Project/Area Number	21860083
Research Category	Grant-in-Aid for Research Activity Start-up
Allocation Type	Single-year Grants
Research Field	Geotechnical engineering
Research Institution	Hakodate National College of Technology
Principal Investigator	KATAOKA Satsuki Hakodate National College of Technology, 環境都市工学科, 助教 (50552080)
Project Period (FY)	2009 – 2010
Keywords	メタンハイドレート / 海底表層土 / 力学的性質 / 物理・化学的性質
Research Abstract	For examination of the soil properties contained shallow type methane hydrate, various strength tests were conducted for the sediment samples collected from shallow type methane hydrate ground. From these tests, the strengths and suction of the sediments into methane hydrate are lower than other areas sediments. Therefore, it was considered that the sedimentary layers were disturbed by gas and water upwelling from underground and the pressure release during the samples. In addition, it is considered that the anisotropy into the specimen made of low salinity levels were equally high regardless of the condition of K0-consolidation from the tests performed by soil change salinity level in the pore water.

(4 results)