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- W2394237803 abstract "In order to study the influence of water pore pressure on time-dependent deformation of surrounding rock in the process of deep rock mass excavation under high stress,step loading triaxial creep test was carried out for deep sandstone from Chongqing under different pore water pressure.The results show that water pressure can enhance the performance of rock creep deformation,but with the increase of water pressure,the deformation of rock is restrained in some extent at the initial loading phase.During rock creep,viscoelastic modulus changes exponentially with time.By analysing the variation of exponential expression parameter at different water pressure,expression of viscoelastic modulus varid with time and water pressure was obtained,then,a revised modified Kelvin was proposed which is much better to discribe the nonlinear viscoelastic creep characteristic in different water pressure.Based on the action of fine sandstone accelerating creep curves at the level of different water pressure,a two component viscoplactic model was acquired by the method of fitting and anology,which is connected with the revised modified Kelvin model in series,then a new nonlinear viscoelastic-plastic constitutive model was gotten.According to test result,the optimize anglysis software 1stOpt was choosed to identify the model parameters,which has a quite ideal effect.The test curves are coincidentwell with the theoretic cruves,which verified the correctness of the model." @default.
- W2394237803 created "2016-06-24" @default.
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- W2394237803 date "2014-01-01" @default.
- W2394237803 modified "2023-09-23" @default.
- W2394237803 title "Influence of high pore water pressure on creep properties of rock under high confining pressure" @default.
- W2394237803 hasPublicationYear "2014" @default.
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