Earthquake Induced Settlement of Imphal City

The present research article estimates the liquefaction induced settlement of 114 sites present in Imphal city due to the 1869 Cachar earthquake (Mw = 7.0). Liquefaction triggering analysis has been performed using the latest revised method. Using the Factor of safety against the liquefaction and relative density (DR) of the soil layer, the sites’ settlement is calculated based on procedures given by (Cetin et al., 2009) and (Ishihara and Yoshimine, 1992). A modified method is proposed, which involves considering optimum depth concept, whereas omitted the depth factor consideration for obtaining the liquefaction induced settlement of Imphal city. Contour map has been prepared to show the variation of settlement throughout Imphal city. The results show that the Kangla place area is more prone to settlement than other Imphal cities. The map generated will help the geotechnical engineer as a ready reference map in the design of foundations.