Reinforced concrete sleepers bearing capacity assessment during the construction and rehabilitation of railway tracks

Abstract

   In the last decade, the development of international relations, the growth of the Russian economy, the reorientation of the flow of goods transported by rail from West to East have set new tasks for the reconstruction of the Baikal-Amur and Trans-Siberian Railways, and conducting pre-design studies on the North Siberian and Central Asian international roads , in particular, to improve methods for calculating structures, railway track elements, and the stress-strain state of concrete and reinforced concrete structures. The article attempts to evaluate the bearing capacity of two sub-types of widely used sleepers (S3-D and S3-D 4×10) from the perspective of calculating reinforced concrete structures using the general method. Thus, all the prerequisites and necessary dependencies were used in the general case of calculating the normal cross-sections of bent elements for any cross-section shapes and reinforcement. Studies have been conducted for concrete compressive strength classes B40 and B55. It is shown that sleepers of the S3-D subtype in the sub-rail section have a higher bearing capacity than sleepers of the S3-D 4×10 subtype. The results of the study also showed that for reinforced concrete sleepers of subtypes S3-D and S3-D 4×10, an increase in the concrete compressive strength class does not significantly affect the bearing capacity of structures.