• 首页 | 期刊简介 | 编委会 | 投稿须知 | 下载专区 | 联系我们 | English
含水合物黏土的力学性质试验研究
Experimental Study on Mechanical Properties of Clay Containing hydrate
投稿时间: 2016-10-24  最后修改时间: 2017-03-30
DOI:
中文关键词:  四氢呋喃水合物,黏土,含水合物黏土,应力-应变,强度
英文关键词:THF hydrate  clay  clay containing hydrate  stress-strain  strength
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
王淑云 中国科学院力学研究所 sywang@imech.ac.cn 
摘要点击次数: 59
全文下载次数: 
中文摘要:
      基于含四氢呋喃水合物黏土样品在不同水合物饱和度、围压及水合物分解前后的高压三轴剪切试验和超声波测量数据,分析了含水合物黏土的应力-应变关系和强度特性。试验结果表明:1)含水合物黏土的应力-应变曲线包括弹性、塑性变形以及应变硬化三个阶段(在应变低于1.5%时近似为弹性,在应变2~6%范围内表现为塑性,在大于6%后呈现明显的应变硬化特性),与不含水合物黏土的应力-应变关系有明显不同;2)含水合物黏土在水合物分解前后的应力-应变关系存在明显的不同,水合物分解后比水合物分解前的不排水强度值降低程度最大为50%; 3)含水合物黏土的不排水抗剪强度随水合物饱和度和围压的增加而增大,并比不含水合物黏土的强度提高1~6倍,表明水合物的存在增强了黏土颗粒之间的连结或胶结作用。
英文摘要:
      Based on a series of static tri-axial compression tests and ultrasonic wave measurements data of clay containing THF hydrate under the conditions of different hydrate saturation, cell pressure and before and after hydrate dissociation, the stress-strain curves and the undrained shear strength characteristics of clay were analyzed. It is shown that 1) The stress-strain curve of clay containing hydrate presents elastic (when strain is less than 1.5%), plastic strain (when strain is between 1.5% and 6%) and obvious strain hardening (when strain is greater than 6%) behaviors, and very different from that of clay not containing hydrate. 2)The stress-strain behavior of clay after hydrate dissociation is very different from that of clay before hydrate dissociation, and the undrained strength decreases maximum extent by 50% than that before hydrate dissociation. 3) The undrained strength of clay containing hydrate increases with hydrate saturation and confining pressure, and 1~6 times higher than that of clay not containing hydrate, and it is the effect of hydrate that makes the interconnect and cementation function among clay particles be stronger.
查看全文  查看/发表评论  下载PDF阅读器
关闭

版权所有:《实验力学》编辑部
您是本站第 1245544 位访问者,今日一共访问76次,当前在线人数: 12
技术支持:本系统由北京勤云科技发展有限公司设计