Abstract:Abstract: The effective consolidation stress method was applicated to analyze the stability of reinforced embankment over soft foundation soils, considering the characteristics of staged-filling subgrade in construction. Based on the working mechanism of reinforced cushion, its two principles in improving the stability of embankment were illustrated by analyzing the tensile force of geosynthetics and the overall stability analysis of the embankment with limit equilibrium method. The results showed that not only the tensile force of geosynthetics can resist the sliding force directly on the tangent of potential failure surface, but its normal component also can enhance the shear strength of foundation soils. Taking the function of reinforced cushion and the consolidation of soft foundation soils during construction process into account, a modified formula of effective consolidation stress method was proposed, which can be used to analyze the stability of reinforced embankment over soft foundation soils. In addition, its features and applicability were studied by the calculation and analysis of engineering projects.
