岩土工程学报2017，Vol.39Issue(z2)：212-215,4.DOI:10.11779/CJGE2017S2051
利用带弯曲元应力路径三轴仪量测静止土压力系数研究
K0-determination by stress path triaxial apparatus with bender element
摘要
Abstract
The coefficient of lateral earth pressure at rest K0 of Shanghai soft clay is measured by the GDS stress path triaxial device. The shear wave velocity and the corresponding small strain shear stiffness at K0 state are also determined by the bender elements planned in the triaxial apparatus. The functional relationship between the maximum shear modulus G0 and the isotropic confining pressure σ'c is established, and then the functional relationship between G0 and K0 is deduced. The possibility of using G0 to calculate K0 is investigated. Meanwhile, the value of G0 at isotropic stress state is also measured and that of K0 is back calculated based on the values of G0 at isotropic stress state and K0 stress state. The results indicate that the dissipation of the excessive pore water pressure during the K0-measurement is very important to obtain the reliable value of K0. Meanwhile, the back calculated values of K0 based on the G0-measurement agree well with the directly measured ones, which indicates the feasibility of K0-determination based on the field shear wave velocity.关键词
静止土压力系数K0/应力路径三轴仪/弯曲元/剪切波速/K0试验Key words
coefficient of lateral earth pressure at rest K0/stress path triaxial test/bender element/shear wave velocity/K0-test分类
建筑与水利引用本文复制引用
刘麟,顾晓强,黄茂松..利用带弯曲元应力路径三轴仪量测静止土压力系数研究[J].岩土工程学报,2017,39(z2):212-215,4.基金项目
国家重点研发计划(2016YFC0800202) （2016YFC0800202）
中国矿业大学深部岩土力学与地下工程国家重点实验室开放基金项目(SKLGDUEK1712) （SKLGDUEK1712）
