Test results of railway ballast for bearing capacity calculations |
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| Authors: | Alexey F Kolos and Anastasia A Konon |
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| Institution: | Emperor Alexander I St. Petersburg State Transport University, Construction of Roads for Transportation Complex Department, Moskovskiy pr. 9, St. Petersburg 190031, Russia;Emperor Alexander I St. Petersburg State Transport University, Construction of Roads for Transportation Complex Department, Moskovskiy pr. 9, St. Petersburg 190031, Russia |
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| Abstract: | This paper presents the results of field and laboratory tests of railway ballast.Field tests were aimed to study vibrational acceleration of ballast particles and ballast layer stressed state in terms of train traffic with heavy axle loads.The test results are vibrational acceleration and stress values distribution in ballast layer and experimental relationships of vertical and horizontal vibroaccelerations damping in terms of train operation with axle load up to 300 kN.Laboratory stabilometer tests were directed to study the change of ballast strength properties due to vibrodynamic impact and shows that for dynamic loading with 10,25,55 Hz frequencies vibrodynamic impact influences strength properties insignificantly and coincides with the accuracy of test equipment.Stated test results provide references for calculation of ballast and sub-ballast bearing capacity. |
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| Keywords: | ballast vibrational acceleration vertical stress heavy axle load stabilometer |
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