CHARACTERISTICS OF TRAFFIC INDUCEDVIBRATION OF GROUND FILLED WITH LIQUEFIED STABILIZED SOIL MADE FROM EXCAVATED VINH PHUC CLAY IN HANOI CITY, VIETNAM

At Hanoi city, the subway system has been constructed for the purpose of modernizing the transportation network. In general, mountain sand is used as backfill of such open-cut transportation tunnels. Recently, for the protection of environment, reuse of excavated soil has been promoted. The characteristics of traffic inducedvibration depend on the stiffness and thickness of sub-layers. It is possible that the traffic induced-vibration can be reduced by the characteristics of backfill. In this paper, using two-dimensional FEM, the characteristics of traffic induced-vibration of ground filled with the liquefied stabilized soil made from excavated Vinh Phuc clay in Hanoi will be compared with those of ground filled with mountain sand.