Experimental Study on Mechanical Properties of Gas Hydrate-Bearing Sediments Using Kaolin Clay

被引：82

作者：

Li Yang-hui ^{[1
]}

Song Yong-chen ^{[1
]}

Yu Feng ^{[1
]}

Liu Wei-guo ^{[1
]}

Zhao Jia-fei ^{[1
]}

机构：

[1] Dalian Univ Technol, Minist Educ, Key Lab Ocean Energy Utilizat & Energy Conservat, Dalian 116024, Peoples R China

来源：

CHINA OCEAN ENGINEERING | 2011年 / 25卷 / 01期

基金：

中国国家自然科学基金; 国家高技术研究发展计划(863计划);

关键词：

gas hydrate; mechanical properties; marine sediment; triaxial testing; safe extraction; METHANE HYDRATE; BEHAVIOR; STRENGTH; STRAIN;

D O I：

10.1007/s13344-011-0009-6

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

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.

引用

页码：113 / 122

页数：10

共 31 条

[1]

Alkire B.D., 1973, Journal of Glaciology, V12, P469, DOI [10.1017/S0022143000031889, DOI 10.1017/S0022143000031889]

[2] STRAIN RATE EFFECT ON THE COMPRESSIVE STRENGTH OF FROZEN SAND [J].