Mechanical and dissociation properties of methane hydrate-bearing sand in deep seabed

被引：390

作者：

Hyodo, Masayuki ^{[1
]}

Yoneda, Jun ^{[2
]}

Yoshimoto, Norimasa ^{[1
]}

Nakata, Yukio ^{[1
]}

机构：

[1] Yamaguchi Univ, Grad Sch Sci & Engn, Yamaguchi, Japan

[2] Natl Inst Adv Ind Sci & Technol, Tokyo, Japan

来源：

SOILS AND FOUNDATIONS | 2013年 / 53卷 / 02期

关键词：

Methane hydrate-bearing sand; Triaxial compression test; High pressure; Temperature; Back pressure; Strength; Stiffness; Stability; NANKAI TROUGH; SEDIMENTS;

D O I：

10.1016/j.sandf.2013.02.010

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

A series of triaxial tests has been carried out on the mechanical properties and dissociation characteristics of sands containing methane hydrate using an innovative high pressure apparatus which has been developed to reproduce the in-situ conditions expected during proposed methane extraction methods. It was found that the strength of MH sand increased with MH saturation due to particle bonding. Dissociation by heating caused large axial strains for samples with an initial shear stress and total collapse for samples consolidated in the metastable zone. In the case of dissociation by de-pressurization, axial strains were generated by increasing effective stress until a stable equilibrium was reached. However, re-pressurization led to the collapse in the metastable zone. (C) 2013 The Japanese Geotechnical Society. Production and hosting by Elsevier B.V. All rights reserved.

引用

页码：299 / 314

页数：16

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