Abstract
A series of centrifuge model tests was carried out in order to investigate the efficiency of chemical grouting as a countermeasure against the liquefaction of sand with existing oil tanks. The test results indicated that the improvement of the area beneath the tank by the chemical grouting was effective in reducing the maximum settlement and differential settlement of the tank and the maximum settlement decreased almost linearly with the depth of the improvement. Some differences were observed in the recorded acceleration and subsidence behavior between 2D plane strain models and 3D models with a circular tank, which clearly showed the 3D effects in the settlement behavior of the tank under seismic loading.
