Dynamic response and pile-soil interaction of a heavy-haul railway embankment slope reinforced by micro-piles

We investigated the dynamic characteristics and pile-soil interaction of a heavy-haul embankment reinforced by micro-piles. First, the vibration of a heavy-haul railway under a C80 train was tested. Based on the acceleration test, the dynamic response characteristics were further studied using a model test and 3D numerical simulation, which were verified via comparison with the field test. Finally, by integrating the model test and numerical simulation results, the influence of the pile length, pile diameter and pile spacing on the dynamic behavior of the embankment was analyzed, and the vibration-attenuation characteristics and dynamic soil-arching effect were discussed.