The deformation properties of railway ballast under cyclic loading revealed by full-scale model tests are discussed. A series of cyclic loading tests were performed at various loading amplitudes and the various center values of amplitude. It is found that the increment of settlement is larger when the maximum load is smaller at the same loading amplitude. Moreover, a series of cyclic loading tests were performed by using various sleepers with different lengths and heights. It is found that the differential settlement of sleeper is larger when the sleeper length is smaller.

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