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High and steep soil slope stability problem has long been the hot topic in transportation engineering , one of the research questions involving high-speed railway , highway, deep construction pit reservoir bank dams , mining and other engineering fields . With the country's western development , central China , to expand domestic demand and promote economic construction and development , and other important policies are implemented , a large slope engineering construction projects will be everywhere , so the issue more attention by the majority of scientists . So how to make accurate on slope stability reasonable and effective safety evaluation, has a huge social and economic effects . This paper studies the existing soil slope stability based on the utilization of plastic soil mechanics, numerical analysis , creep mechanics , engineering geology, slope engineering and other disciplines multi-disciplinary knowledge , the use of large-scale projects powerful nonlinear finite difference numerical software FLAC3D and FISH secondary development of embedded languages ??, as well as high-level computer programming language VC, to study the program calculates the slope for the displacement , plastic zone distribution , shear strain rate and the amount of other key safety factors to discuss slope stability changes in the characteristics with time . In this paper, Yingtan - Xiamen Railway Cutting steep soil slope for the study, according to data collection - on-site surveys and experiments - to establish model - Programming - numerical example - displacement monitoring of technical ideas . In the finite difference calculations , using tetrahedral mesh , creep model for the applicability of the three strong creep model parameters (HK creep model ) , using least-squares techniques to obtain the shear strength index , cohesiveness force c and friction angle φ, obtained through Laplace PTS creep parameters, obtained using strength reduction factor of safety , has analyzed the vertical displacement characteristics over time , that is in the initial stages of displacement versus time soon , with the extension of time change mitigation ; focuses on high and steep soil slope hidden in the toe of slope and slope in the lower zone. The results coincide with the actual investigation , which is high and steep road cutting soil slope stability analysis draws some conclusions can be funded applications .
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