含甲烷水合物非固结沉积物三轴实验Triaxial Test of Unconsolidated Hydrate Sediment Containing Methane
黄萌,单红仙,刘乐乐,李彦龙,贾永刚,刘昌岭
摘要(Abstract)：
利用自主研发的水合物合成与分解一体化三轴实验装置,以中细砂作为水合物赋存介质,在不同有效围压(1 MPa、2 MPa、4 MPa)条件下,对不同水合物饱和度(0%、13.3%、26.6%、39.9%)的松散沉积物进行三轴剪切实验,探讨了水合物饱和度和有效围压对沉积物应力应变曲线形态及不同抗剪强度指标的影响规律,得到不同强度参数的经验模型。结果表明:含甲烷水合物非固结沉积物的应力应变曲线形态是水合物饱和度和有效围压共同作用的结果;抗剪强度、起始屈服强度与水合物饱和度有关,而受温度和有效围压的影响较小;黏聚力和内摩擦角随水合物饱和度的增大而增大。
关键词(KeyWords)： 甲烷水合物;非固结沉积物;三轴实验;应力应变曲线;抗剪强度
基金项目(Foundation): 国家自然科学基金项目(编号:41427803、41376078);国家自然科学基金青年基金(编号:11402131)
作者(Author): 黄萌,单红仙,刘乐乐,李彦龙,贾永刚,刘昌岭
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