ABSTRACT
A series of dynamic centrifuge model tests was performed to investigate the efficiency of chemical grouting as a countermeasure against the liquefaction of sand with existing oil tanks on the surface. The parameter mainly investigated in the tests is the grouting depth ratio to the depth of the liquefiable layer. The test results indicated that the improvement of the area beneath the tank by 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 dynamic response and the settlement 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.
