考虑试样宽度影响的绿片岩双轴压缩蠕变试验  

BIAXIAL COMPRESSION CREEP TEST FOR GREENSCHIST CONSIDERING INFLUENCE OF SPECIMEN WIDTH

作　　者：熊良宵[1,2,3] 李天斌[2] 杨林德[3] 

机构地区：[1]宁波大学建筑工程与环境学院,浙江宁波315211 [2]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [3]同济大学地下建筑与工程系,上海200092

出　　处：《岩石力学与工程学报》2013年第S2期3385-3390,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学青年基金项目(41002108);成都理工大学地质灾害防治与地质环境保护国家重点实验室开放基金项目(SKLGP2011K008);岩土钻掘与防护教育部工程研究中心开放研究基金课题(201104)

摘　　要：对绿片岩试样进行双轴压缩蠕变试验,采用六元件黏弹性流变模型对试验曲线进行拟合分析,研究试样宽度尺寸对蠕变变形规律的影响。研究结果表明:相同应力水平下,当将试样的宽度逐渐增加时,轴向应变和侧向应变并非呈一直增加或减小的趋势;轴向稳态蠕变速率呈逐渐减小的趋势。蠕变试验曲线和理论模型曲线较吻合,说明六元件流变模型能较好地描述绿片岩的黏弹性蠕变特性。The biaxial compression creep tests for greenschist were carried out. The creep test curves were fitted by six-component viscoelastic rheological model,and the influence of specimen width on creep deformation rule was studied. The results show that the axial and lateral strain will not always increase or decrease with increasing specimen width under the same stress level,but the axial creep strain rate of second creep stage will reduce all the time. The six-component viscoelastic rheological model curve and experimental curve approximately coincide with each other,which indicates that the rheological model is appropriate for determining the viscoelastic rheological parameters of greenschist.

关 键 词：岩石力学 双轴压缩蠕变试验 水电站 绿片岩 

分 类 号：TU458[建筑科学—岩土工程]