Estimation of carrying capacity of metallic corrugated structures of the type Multiplate MP 150 during interaction with backfill soil
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 1, Issue 1
Abstract
<p>We estimated the stressed state of a railroad structure with a large cross section spanning more than 6 m, which is made from metallic corrugated sheets of the type Multiplate MP 150. The stressed-strained state of the corrugated structure was estimated depending on the residual deformation of vertical diameter of the pipe, the modulus of elasticity of backfill soil, and the degree of compaction. The study conducted has demonstrated that maximum stresses occur on the horizontal sides of a metallic pipe, and maximum deformations – in the pipe vault.</p><p>It was established that an increase in the degree of compaction of backfill soil leads to a decrease in the stresses in a metallic pipe by almost half. The stresses grow much faster with an increase in irregularity on the railroad track. Numerical calculations have shown that the equivalent stresses exceed the permissible magnitude of 235 MPa when the degree of compaction of backfill soil is below 90 % and an operational irregularity on the track develops beyond the permissible magnitude.</p><p>Operational observations have shown that the pipe is most vulnerable, in terms of resistance against the formation of a plastic hinge, in the initial period of operation when the backfill soil has not yet reached the standard compaction. At the initial stage of operation of a metallic corrugated pipe it is necessary to improve the level of technological control in order to timely detect railroad track’s irregularities that exceed the standards, and to eliminate them.</p><p>Under normal operational conditions, a metallic corrugated structure has a rather large reserve of carrying capacity, which amounts to 80 %. However, these structures, despite their high initial strength margin, are very sensitive to an increase in external dynamic loads due to the occurrence of irregularity on the railroad track.</p>
Authors and Affiliations
Vitalii Kovalchuk, Yuri Kovalchuk, Mykola Sysyn, Volodymyr Stankevych, Oleksiy Petrenko
Keywords
Related Articles
- EP ID EP527720
- DOI 10.15587/1729-4061.2018.123002
- Views 115
- Downloads 0
Studying the physicochemical regularities in the color- and phase formation processes of clinker ceramic materials
<p>The paper reports results of a comprehensive study, aimed at developing formulation-technological parameters for obtaining volumetrically dyed clinker ceramic materials with a wide range of colors. A possibility has b...
Design of the composition of alkali activated portland cement using mineral additives of technogenic origin
<p>This paper reports results of the development of cement compositions and production technology for common cement systems "portland cement clinker – mineral additives – alkaline activator – water-reducing admixture", w...
Investigation of the change in the strength properties of a soil mass by mechanical sensing
<p>Determination of depth distribution of strength characteristics and comparison with analytically determined values allows obtaining data on the depth of various morphological horizons, the presence of voids and inclus...
Establishment of fire protective effectiveness of reed treated with an impregnating solution and coatings
<p>An analysis of techniques for determining the fire protective effectiveness of reed was performed; the need to develop reliable methods for studying the process of ignition and flame propagation around the surface of...
Design and study of the energyefficient unified apparatuses for energytechnological manufacturing
<p>The improved industrial sample of the rotor-pulse heat generator (RPH), integrated into the thermal heating systems of industrial buildings, was produced. Rotor-pulse generators do not occupy significant positions in...