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Abstract Aiming at the shortcomings of component creep models，such as linear constitutive relationships，converging easily and entering accelerative stage too quickly，a new empirical nonlinear damage viscoelasto- plastic model which can reflect rock creep damage effect is put forward based on creep experiments. The model is verified to be correct by means of simulating a uniaxial compression numerical test which makes use of user¢s subroutines of ABAQUS. Finally，the model is applied to simulating the whole construction process of Dagangshan underground powerhouse under two working conditions，with and without considering damage factor，respectively. By comparing the results two working conditions，it is demonstrated that the results of considering damage factor working condition can bring forward more reasonable reference than that of without considering damage factor，especially in plastic zone，damage degree and deformation of rock mass.
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Received: 04 March 2010
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