Anti-sliding Stability Analysis Of Concrete Gravity Dam Sliding Along Foundation Plane

Concrete gravity dam depends on its own weight to maintain stability, it is one of the main styles of the hydro-junction constructions, but the binding force between dam and rock foundation is small, rock foundation surface is easily weathered and the existence of rock joints, the foundation surface is deemed to be one of the critical slip planes.This paper summarized the failure mode, research approaches and research progress both at home and abroad of anti-sliding stability of gravity dam. Then study the anti-sliding stability of gravity dam along foundation plane, the main contents are as follows:1. Using fault tree analysis building fault tree model for concrete gravity dam sliding along foundation plane, then using structure importance degree and fuzzy comprehensive evaluation to rank the influence of risk factors, and get three of risk factors, flooding, seismic effects, seismic effects and landslide, for further study.2. Taking koyna concrete gravity dam for example, using strength reduction method to research anti-sliding stability of gravity dam under flooding effects, get the plastic zone and safety coefficient.3. Using the analysis of power spectrum to study anti-sliding stability of gravity dam under seismic effects, get the displacement, stress, velocity, acceleration and acceleration response of the power spectrum of key parts.4. Using acceleration time history analysis to study anti-sliding stability of gravity dam under seismic effects, get the safety coefficient, displacement and plastic zone.5. Using harbor hydrology specification to calculate the wave force by landslide, then calculating the safety coefficient and plastic zone of gravity dam under seismic effects and landslide. Contrast the results of gravity dam with only under seismic effects.The conclusions about safety coefficient and the plastic zone of gravity dam under different kinds of operating conditions, will provide a scientific basis for dam design and construction during the risk management, reinforcement, seismic effects, seismic effects and landslide.