Synchronous Computation Analysis on Subgrade Settlement and Stability

Based on Biot consolidation theory and strength reduction concept,using rapid Lagrange method of difference,this paper carries out real-time synchronous numerical analysis on expressway subgrade settlement and stability.The result shows that during construction period,with the increase of filling height,subgrade settlement increases linearly and slope safety factor decreases gradually.During operation period,with the diffusion of pore water pressure,cumulative consolidation settlement finally trends stable.Safety factor of slope is the minimum at the initial stage of construction completion.