Numerical Simulation Study on the Toppling Deformation Process of Rock Mass in a Hydropower Station Based on FLAC3D
The geological processes in the mountainous and canyon areas of southwestern China are strong,and the tilted and deformed rock masses are widely developed.The FLAC3D software based on the Lagrangian finite difference method can conduct numerical simulation research on the process of rock mass toppling deformation.This article establishes a rheological model to study the toppling deformation of a hydropower station under construction in the upper reaches of the Lancang River.The results indicate that under the long-term action of the self weight and unloading stress of the rock mass,the steep rock layers in the reservoir area will tilt and deform towards the vacant position.This is a long-term rheological failure process.The tilting deformation only develops in the shallow surface of the slope,and the deep rock mass does not experience tilting.The rock layers at the bottom of the shallow layer bend the most strongly,and the rock layers in these areas will be the first to break.If the broken section is connected,it is highly likely to cause the overall collapse and sliding of the toppling body,leading to disasters such as landslides.In the construction of hydropower stations,it is important to focus on supporting slopes with severe tilting deformation to prevent large-scale instability and damage.
toppling deformationnumerical simulationFLAC3Ddeformation and failure
万方数据
维普
