SEISMIC MITIGATION OF EMBANKMENT BY USING DENSE ZONE IN SUBSOIL

The earthquake shaking experiment provides a great amount of valuable insight into the dynamic behavior of embankment setting on the subsoil. The embankment models developed in the laboratory are exact simulations of the elements of embankment on the subsoil. Acceleration and excess pore water pressure are measured through acceleration and pore water pressure types of sensors. The results clearly revealed that the embankment suffers immediate collapse when dynamic force is applied if it consists of soft soil or is built on soft soil. With the provision of a geo-textiled dense zone confined inside the toe of the embankment, the lateral force on the embankment decreased considerably when it is under dynamic force and increased the stability of the subsoil, which resulted in a reduction of unsustainable deformation and differential settlement.