鲁晓兵,张旭辉,石要红,王淑云,罗大双

• 1:中国科学院力学研究所
• 2:中国科学院大学工程科学学院
• 3:广州海洋地质调查局

摘要(Abstract)：

以中国近海某天然气水合物(水合物)区的海底粉质黏土制备水合物沉积物样品,并在土工三轴仪上进行实验,分析其应力应变曲线和破坏应力特性。结果表明:力学常数如破坏应力(应变为15%对应的偏应力)随水合物饱和度的增加而增加,在饱和度约25%时破坏应力产生跳跃,即破坏应力随水合物饱和度的变化可分为两部分,饱和度小于25%时水合物的存在对沉积物破坏应力影响较小,大于25%时影响较大。在水合物饱和度小于45%的范围内,水合物沉积物的应力应变曲线可分为弹性段、屈服段和强化段。文中给出了描述其应力应变曲线的分段函数。

关键词(KeyWords)： 黏土水合物沉积物;应力应变曲线;破坏应力

Abstract:

Keywords:

基金项目(Foundation): 中国地质调查局项目(GZH2011003);; 国家自然科学基金项目(11072245,41376078)资助~~

作者(Author): 鲁晓兵,张旭辉,石要红,王淑云,罗大双

DOI: 10.16441/j.cnki.hdxb.20160474

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