Abstract：Abstract：In order to study the effect of water content on rock creep, the water switch and the creep damage threshold are introduced into a new creep model named rock water-damage creep model, through which the coupling of water deterioration and creep damage is realized on constitutive relation. The rock water-damage creep model has good imitative effect by comparison with the triaxial compression creep test results of a soft rock, and the variation laws of the model parameters with the water content are inversed by Levenberg-Marquardt (LM-UGO) algorithm. In the environment of C++ language and Fish language in FLAC3D, through deducing its constitutive equation in three-dimensional difference form, the rock water-damage creep model is secondarily developed by the interface of FLAC3D. After validating its accuracy by an engineering example, the rock water-damage creep model is used in numerical simulation to reflect that the roadway stability is gradually weakened with the increase of water content in surrounding soft rock.
2018, Vol. 39 
