| More than half a century, reinforced earth technology has rapidly developed through-out the world, and has be used widely in many fields such as dams, railways, high-way, mine and wharf and so on, however, the theory still falls behind the practice. As the construction in the west and the reinforced earth technology regulation improve, the height of the reinforced wall would be increased, but the standard has not been developed. It is significant to carry out the research on the stabilization of the reinf-orced walls.Now in our country, among the "Code for design of highway reinforced earth engineeri-ng" and "Code for design on retaining engineering structures of railway subgrad", the in-ternal stability analysis of the reinforced walls was based upon the limit equilibrium method, but according to the engineering practice, the limit equilibrium method are very conservative and inaccurate for geosynthetic walls. Through the contrastive study on the K-stiffness method and the Simplified Stiffness Method, This paper has dra-wn a conclusion about the main factors on accuracy including the reinforcement load distribution, local reinforcement stiffness, facing batter, facing stiffness, and the soil property. At the same time, through the comparison of the K-stiffness Method and the Simplified Stiffness Method, it shows a high-accuracy and a wider range of ap-plications on the Simplified Stiffness Method.Therefore, this paper suggests a new way to calculate the stability of the multistage reinforced soil walls, that is "the Simplified Stiffness Method Of The Multistage Rei-nforced soil walls". Through the engineering practice and the numerical simulation,it has been proved that the Simplified Stiffness Method is compatible with the real co-nditions and has a higher precision. |
