This paper presents the results of field and laboratory tests of railway ballast. Field tests were aimed to study the 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.
IOS Press, Inc.
6751 Tepper Drive
Clifton, VA 20124
Tel.: +1 703 830 6300
Fax: +1 703 830 2300 firstname.lastname@example.org
(Corporate matters and books only) IOS Press c/o Accucoms US, Inc.
For North America Sales and Customer Service
West Point Commons
Lansdale PA 19446
Tel.: +1 866 855 8967
Fax: +1 215 660 5042 email@example.com