Abstract：The visco-elastoplastic rheological failure model for rock block and joint is studied. A new concept of rheological instantaneous strength is firstly proposed；and on the basis，the nonlinear visco-plastic rheological failure model for rock and joint is established. Taking the uniaxial compression creep test for example，the visco-plastic deformation characteristics described by the new model is discussed. Then，the complete visco- elastoplastic rheological failure model for rock is established；and the creep as well as the relaxation characters of rock described by the model are analyzed. The influence of the parameter on rheological deformation and failure pattern is studied showing that the model can well reflect the brittle-ductile failure pattern of rock. By comparison with the uniaxial creep test of marble，it is found that the test and calculation by the model are coincident well，especially in the failure stage. Furthermore，the complete visco-elastoplastic rheological failure model for joint is also discussed. The calculation of creep failure process for a grouted joint is demonstrated to be well coincident with the test results. Finally，the new model is applied to the rheological failure analysis of the access tunnel of the Dagangshan hydropower station. The failure process is well modeled and the failure time is successfully forecasted，which can be the basis for further design of bolt and shotcrete support. The proposed visco-elasto- plastic rheological failure model for rock and joint is not only clear in concept，well simulating the rheological failure process and determining the failure time，but also the parameters can be easily measured by conventional tests showing the good application perspective in practical engineering.
佘成学，孙辅庭. 节理岩体黏弹塑性流变破坏模型研究[J]. 岩石力学与工程学报, 2013, 32(2): 231-238.
SHE Chengxue，SUN Futing . RESEARCH ON VISCO-ELASTOPLASTIC RHEOLOGICAL FAILURE MODEL OF JOINTED ROCK MASS. , 2013, 32(2): 231-238.
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2013, Vol. 32 
