Stability Analysis of High Stilling Pool Slope of a Hydropower Station based on DDA
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Abstract:
The software FLAC3D based on the nonlinear finite difference method was used to obtain the position of potential sliding surface of the high stilling pool slope in a hydropower station. A block system analysis model was developed based on the discontinuous deformation analysis (DDA)This model was used to analyze the relationship between the displacement and strength parameter of the current slope and reinforced slope, which provided the ultimate internal friction angle and the corresponding stability safety factor of the slope before and after reinforcement. The results showed that the slope has a relatively smaller safety factor and is likely to be instable before reinforcement. After the reinforcement with the prestressed anchor cable, the safety factor of the slope increased significantly to meet the requirements of normal operation.
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