Determination of Liquefaction Potential of NCR Region

Abstract

Evaluation of liquefaction potential of a region is useful in a variety of ways as it gives information on the geological characteristics of the region of interest and proves to be important when it comes to taking preventive measures before and after the occurrence of an earthquake. Study and analysis of liquefaction potential index involve criteria like the geotechnical characteristics, the historical criteria as well as the seismic vulnerability of the region. Region selected falls in both Delhi and Noida; hence, NCR region is taken in title. It was observed that the evaluation of LPI is of paramount importance. The aim of the present report is to evaluate potential of liquefaction of Noida and Greater Noida region by calculating factor of safety against liquefaction using simplified approach and comparison of the results with respect to the methods used; these results will extend its help in micro-zonation of the region. The total boundary of the study area falls within a radius of 20 km approximately. Standard penetration test was vital for the collection of SPT-N values. The field test was carried out at the specified location, and various soil characteristics were recorded for analysis using SPT. The project also consists of the effect of factor of safety due to the change in the peak ground acceleration by increasing or decreasing it as well as the change in the magnitude of the earthquake on the liquefaction potential sites.  It was observed that, the MSF depends upon the resistance of the soil against the seismic activity and peak ground acceleration depends upon the seismic capacity of the earthquake against the soil. In our present study, 0.24g has been used.