A comparative study of SPT-based liquefaction potential estimation methods from three sites in India

In the present study, four different SPT-based methods for liquefaction assessment namely Seed and Idriss (S-I), Tokimatsu and Yoshimi (T-Y), Japan Road Association (JRA), and Chinese code for Seismic Design of Buildings (CSDB) method has been discussed in detail. The present study compares the liquefaction potential estimation of S-I, T-Y, and JRA methods, respectively. The S-I method predicts 9.29 and 3.42 times higher liquefaction occurrence compared to JRA and T-Y methods respectively. Different damage indices such as liquefaction potential index (LPI), liquefaction risk index (LRI), and ground settlement have been evaluated for an earthquake magnitude of 7.5 on the Richter scale and peak ground accelerations varying in the range of 0.1-0.36 g respectively. LRI provides a more precise estimation of the liquefaction damages compared to LPI. The gradation of liquefiable soil has been presented and compared with the established limits of liquefiable soils.