Stability Research of Lanan Rock-Fill Dam Based on Limit Equilibrium Method
There are corresponding stability criterions for limit equilibrium method, which is simple to implement and has been used for long-term. But this method is only considered the equilibrium of system without considering deformation, compatibility conditions and material constitutive. To improve the method, which is used to analysis the stability of Lanna dam, was proposed to optimize the boundary conditions, consider the discontinuity between the media in junction and add additional stress to consider the effects of buoyancy and seepage. After completion, tests showed that this approach could overcome limit equilibrium method’s shortcoming and describe the discontinuous characteristics of media naturally, such as dislocation, opening, slip and so on. And the result is reliable.