Abstract
Cyclic deformation properties of railway ballast under vertical cyclic loading revealed by full-scale model tests are discussed. In order to improve the prediction accuracy of the ballast settlements in the ballasted track, a series of cyclic loading tests were performed to be focused attention on the condition of minimum load and the shape of sleeper in the various design condition. It was found that the settlement of railway ballast increased to be supported at the central part of sleeper for the ballasted track on the standard rigid roadbed when the small void became to be grown between the bottom surface of sleeper and upper surface of railway ballast around the end of sleeper by the cyclic loading.
