Abstract：Research purposes: When there was new construction project near the existing railway, the excavation activities often affected the slope stability. Even worse, the landslide would be caused as a result of the construction project and associated accidents occurred frequently. So it is essentially important to evaluate the slope stability properly in order to ensure the safe operation of existing railway. In this paper, a new reliability slope stability method was established based on the finite element strength reduction method and the point estimate method, and it was applied to an actual project.
Research conclusions:(1)Slope stability evaluation method based on reliability theory, can comprehensively reflect the influence of the geotechnical parameters of spatial discreteness and time variability，the analysis result more accord with the engineering practice. (2) The reliability slope stability method established in this paper can overcome the shortcomings of traditional safety factor method and can show a better interpretation for the slope stability analysis with the variation of geotechnique parameter. (3)By using the new reliability slope stability method established in this paper, the analysis process is simple and the calculation results is consistent with the Monte-Carlo method, so it is reliable method and has a good promotional value. It can provide a good reference for the similar engineering.
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2014, Vol. 31 
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