Stability Safety Analysis of Wuhan Section of Changjiang Dike under Drawdown Conditions

摘要

A saturated-unsaturated soil seepage mathematical model and transient finite element patterns are considered to study the slope stability of Wuhan section of Changjiang dike under drawdown conditions, for rapid drawdown of water level tend to cause landslides. During the drawdown process transient seepage is factually simulated and the safety factor is calculated corresponding to each level. The effects of different drawdown speed and various material parameters on slope stability are discussed. The results show that the embankment hydraulic conductivity and drawdown rate have important influence on slope steady. Larger soil hydraulic conductivity and slower drawdown speed is advantaged for slope stability. The Wuhan section of Changjiang dike is safe under the present design conditions.