In order to analyze the influence of bedding and water on the creep characteristics of shale

five kinds of shale are prepared in the laboratory

including 0

30

60

90 degrees and no bedding. Each kind of bedding shale is treated with 4 kinds of water bearing state

which is dry

natural

water unsaturated and water saturated. The results show that: (1) The bedding angle and water content have great influence on the creep characteristics of shale. At the same moisture content

with the increase of the angle of stratification

the initial instantaneous elasticity of shale decreases exponentially and the instantaneous elastic modulus increases exponentially. At the same layer angle

with the increase of moisture content

the initial instantaneous elastic strain linear growth of shale and linear decrease of instantaneous elastic modulus. (2) The creep of shale is described by Burgers creep model with elastic elements

viscous elements and Kelvin body

and the parameters of the model inversion and the verification. The results show that the model can better reflect the features of the shale creep. According to the law of the influence of the bedding and water on the creep deformation of shale and based on the fitting relationship between the instantaneous elastic modulus

the viscosity coefficient and the bedding angle

water content

the instantaneous elastic modulus and viscosity coefficient of the creep model are replaced by a function of the bedding angle and moisture content; thus a creep model which can reflect shale bedding and water content is constructed.