: The mechanical behaviors of a jointed rock mass are strongly affected by the property and geometry of joints. In the present study, a constitutive model of rock masses with multiple fracturing joints is proposed. It reflects the effect of orientation and density of joints. Then, the proposed constitutive model is implemented into a finite element analysis code. As an example, a problem of excavation of a power station cavern is analyzed. Characteristic features of displacement distribution, the opening and sliding of joints, and the change in the tensile forces in prestressed anchorage bars during excavation process are captured in the present analysis.

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