Abstract：The monitoring work and related observations were conducted in the north slope of the permanent shiplock of the Three Gorges Project by sliding deformeter. The interpretation of the observed data indicates that：(1) the rock mass in the slope deformed mainly in a shallow belt underneath the excavation surface，termed as disturbed zone，(2) the deformation of the rock mass in disturbed zones was mainly composed of “opening displacement” of primary structure planes，constituting 66.7% of the total accumulative deformation on average，(3) the magnitude of deformation is closely related to the excavation intensity，(4) the slope is stable in the monitoring region based on the analysis of deformation trend.
