Abstract
The subject of this paper is analysis of the influence of horizontal forces estimated on the basis of Eurocode on the stability of an exemplary railway embankment located in the horizontal curve. The work begins with an overview of the methods for determining the earthworks stability. The methods are presented along with a reference to the recommendations contained in Eurocode 7. On the basis of the Eurocode, the loads acting on the analyzed embankment are presented together. In addition to the standard vertical interactions (from the rolling stock, the weight of the track structure and ground), the calculations also take into account horizontal forces caused by: wind forces on rolling stock, centrifugal forces and nosing force of the rolling stock as well as thermal stresses in the rails. Next, there are 15 load combinations calculated according to the Eurocode guidelines. At the end of the work the values of safety factors of the embankment obtained by shear strength reduction method are presented. The obtained results show a significant influence of horizontal forces calculated on the basis of the Eurocode on the stability of the railway embankment analyzed in the work.
Highlights
Standard railway embankment stability calculations take into account only the vertical impact of rolling stock, the weight of railway track and the ground
It should be noted that in the case of load combinations from 11 to 14, the eccentricity of forces transmitted to the track by the rolling stock exceeds the distance between the rails, which would lead to the vehicle rollover
On the basis of the analyzes carried out, conclusions can be drawn regarding the influence of the analyzed horizontal impacts on slope stability
Summary
Standard railway embankment stability calculations take into account only the vertical impact of rolling stock, the weight of railway track and the ground. This approach is justified, since the PN-EN 1991-2: 2007 standard [1] for railway earthworks specifies only the vertical loads. The aim of the work was to analyze the influence of these impacts on the stability of an exemplary railway embankment located in the horizontal curve. It was estimated on the basis of Eurocodes [1, 3, 4]. The transient situations have been omitted, relating, for example, to the construction or reconstruction of an object, as well as exceptional situations, e.g. derailment
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