EVALUATION OF SHEET PILE-RING COUNTERMEASURE AGAINST LIQUEFACTION FOROIL TANK SITE

The evaluation of a countermeasure against liquefaction which uses a s heet pilering for oil tank sites is presented. The simulation of earth quake responses observed at tank sites with and without sheet pile-rin g is first performed to validate the three-dimensional finite element numerical model. Using the numerical model, liquefaction analysis is p erformed and the excess pore water pressure generated in the soil and the settlement of tank are investigated. The comparison of two- and th ree-dimensional models is also conducted to assess the applicability o f two-dimensional analysis. The results show that the numerical model could simulate the observed earthquake responses of tank-ring-soil sys tem, and that the excess pore water pressure and the settlement of the tank could be significantly reduced using a sheet pile-ring. The two- dimensional analysis proves to be capable of representing the main fea tures of the dynamic response of the three-dimensional tank-ring-soil system. Copyright (C) 1996 Elsevier Science Ltd