A RHEOLOGICAL DAMAGE MODEL OF SANDSTONE AND ITS APPLICATION TO ENGINEERING
WANG Wei1，2，LU Jun1，2，WANG Haicheng1，2，SUN Shaorui3
(1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering，Hohai University，Nanjing，Jiangsu 210098，China；2. Geotechnical Research Institute，Hohai University，Nanjing，Jiangsu 210098，China；3. School of Earth Sciences and Engineering，Hohai University，Nanjing，Jiangsu 210098，China)
Abstract：Common method of describing the rheological damage is usually limited to the accelerated rheological stage，and damage in the decay and steady rheological stages are not considered，which contradict lots of experimental results. In order to better describe three stages of rock rheology，a rheological damage constitutive model for sandstone is proposed by using the damage theory and by introducing the concept of the whole process of damage into Burgers rheological model based on the Mazars damage evolution law. The validity of the model is verified and the parameters are determined by fitting the triaxial rheological test data. Then，the model is applied to the Phoenix Mountain Tunnel project by using the fast lagrangian analysis of continua in three- dimention(FLAC3D). The field monitoring data are compared to the model prediction using the proposed rheological damage model and the rheological model without damage. Results show that the numerical prediction using the proposed model agrees well with the field measurements and describes well the damage and rheological properties of surrounding rocks of the tunnel. Accordingly，the rheological damage model considering the whole process of damage is reasonable.
王 伟1，2，吕 军1，2，王海成1，2，孙少锐3. 砂岩流变损伤模型研究及其工程应用[J]. 岩石力学与工程学报, 2012, 31(s2): 3650-3658.
WANG Wei1，2，LU Jun1，2，WANG Haicheng1，2，SUN Shaorui3. A RHEOLOGICAL DAMAGE MODEL OF SANDSTONE AND ITS APPLICATION TO ENGINEERING. , 2012, 31(s2): 3650-3658.
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2012, Vol. 31 
