赵志超,朱志鹏,王栋,周鸣亮

• 1:中国海洋大学环境科学与工程学院
• 2:同济大学土木工程学院

摘要(Abstract)：

利用水饱和法制备含天然气水合物试样,进行等向压缩试验和不排水三轴试验。采用天然气水合物临界状态(MHCS)模型同时预测排水条件和不排水条件下的三轴试验,并进行变动参数分析。不排水条件下,密实纯砂发生应变硬化,而相近密实度的含水合物试样出现应变软化,峰值偏应力随水合物饱和度和围压增大。通过与排水和不排水三轴试验结果的对比,验证了MHCS模型对含水合物粉细砂的适用性与局限。变动参数分析表明:两个关键参数的取值显著影响峰后偏应力的软化过程,但二者的作用均存在相当程度的不确定性。

关键词(KeyWords)： 天然气水合物;粉细砂;三轴试验;水饱和;本构模型

Abstract:

Keywords:

基金项目(Foundation): 中央高校基本业务经费项目(841962013);; 国家自然科学基金项目(42025702)资助~~

作者(Author): 赵志超,朱志鹏,王栋,周鸣亮

DOI: 10.16441/j.cnki.hdxb.20210097

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