三峡工程永久船闸高边坡变形数值仿真分析

基于实际的开挖过程、锚固措施和地质条件建立了三峡永久船闸高边坡的二维和三维数值模型，按9种工况对边坡变形进行了数值仿真分析．计算成果表明，岩体开挖卸荷对边坡的变形有较大影响，正确地划分岩体卸荷带使计算结果更趋合理；锚固和地下水对边坡的整体变形影响较小；边坡岩体仅局部产生零星塑性屈服区，但在中隔墩顶部有拉应力区，可能引起岩体开裂；粘弹塑性模型计算成果显示，边坡开挖完成后变形将趋于稳定．

Numerical Simulation of Deformation of Permanent Shiplock High Rock Slope of Three Gorges Project

Two dimension and three dimension numerical models of the permanent shiplock high rock slope of the Three Gorges Project(TGP) were established on the basis of excavation process,reinforcement measures and geological conditions;and nine simulation schemes were carried out with the two models.The results show that the excavation disturbance has an important effect on the slope deformation;and proper division of the unloading-zone can make better results.Reinforcing cables and groundwater have minor effect on the deformation of the slope.The results also show that there are only few small isolated plastic yield zones in the slope rock mass;but there are some tension zones near the top of the central rock wall which may cause tension crack.The results of viscoelastic plastic model indicate that the deformation of the slope can keep stable in the long term.