ASSESSMENT OF LIQUEFACTION POTENTIAL OF POND ASH AT PANIPAT IN INDIA USING SHAKE2000

摘要

In this paper liquefaction potential of pond ash deposits consists of pond ash and foundation soils have been studied. Two pond ashes namely Unit-I and Unit-II, located at Panipat in India which comes under seismic Zone IV are considered as the part of the study. One borehole was drilled at upstream site of each pond ash and standard penetration tests were carried out at every 1.5m interval up to 40m and 30m depth for Unit-I and Unit-II pond ash respectively. Undisturbed samples were collected by sampling from each bore hole and geotechnical classification tests were performed in the laboratory. The liquefaction analysis of pond ash was carried out by using Seed and Idriss method and 1-D ground response analysis. The ash deposits are found to be loose to medium dense. The pond ash is classified as SMN (Non-plastic sand-silt size fraction). It is concluded that pond ash sites are susceptible to liquefaction for an earthquake of magnitude (M_w) greater than 6.4.