130 Reinforcing Mechanism of Reinforced Embankments over Soft Soils

Geo-synthetics reinforced and sand wick embankments have been regarded as an effective alternative, which adopted worldwide to solve the problem appeared in the construction of embankments on soft soils. At present, the safety factors are improved little with circular failure analysis method stated in the criterion for preventing deep-seated slope failure of reinforced embankments, which not agree with the actual effects. Numerical methods have been increasingly used for analyzing slope stability including the computation of its factor of safety. Strength Reduction FEM was adopted in this study for analyzing the factor of safety of reinforced embankments, and the influence of some parameters, namely friction angle of mat, reinforcement layer, coefficient and interface and geo-synthetic stiffness, is also analyzed. The conclusions are obtained.