Journal
CHINA OCEAN ENGINEERING
Volume 25, Issue 1, Pages 113-122Publisher
CHINA OCEAN PRESS
DOI: 10.1007/s13344-011-0009-6
Keywords
gas hydrate; mechanical properties; marine sediment; triaxial testing; safe extraction
Funding
- National High Technology Research and Development Program of China [2006AA09A209]
- Major National ST Program [2008ZX05026-004]
- Major State Basic Research Development Program of China [2009CB219507]
- National Natural Science Foundation of China [91010015]
Ask authors/readers for more resources
A triaxial system is designed with a temperature range from -20 degrees C to 25 degrees C and a pressure range from 0 MPa to 30 MPa in order to improve the understanding of the mechanical properties of gas hydrate-bearing sediments. The mechanical properties of synthetic gas hydrate-bearing sediments (gas hydrate-kaolin clay mixture) were measured by using current experimental apparatus. The results indicate that: (1) the failure strength of gas hydrate-bearing sediments strongly depends on the temperature. The sediment's strength increases with the decreases of temperature. (2) The maximum deviator stress increases linearly with the confining pressure at a low-pressure stage. However, it fluctuates at a high-pressure stage. (3) Maximum deviator stress increases with increasing strain rate, whereas the strain-stress curve has no tremendous change until the axial strain reaches approximately 0.5%. (4) The internal friction angles of gas hydrate-bearing sediments are not sensitive to kaolin volume ratio. The Cohesion shows a high kaolin volume ratio dependency.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available