Assessment of Risk of Liquefaction - A Case Study

摘要

Catastrophic failures in recent earthquakes have provided a sobering reminder that liquefaction of sandy soils as a result of earthquake ground shaking poses a major threat to the safety of Civil Engineering Structures. Major landslides, lateral movements of bridge supports, settling and tilting of buildings, and failure of waterfront retaining structures have all been observed in recent years as a result of this phenomenon and efforts have been increasingly directed to the development of methods of evaluating the liquefaction potential of soil deposits. In the present study, an attempt has been made to evaluate the liquefaction potential of some selected sites in Haryana (India) using standard penetration resistance value 'N'. These sites have been selected keeping in mind their increased susceptibility to liquefaction due to favourable soil & water table conditions. According to IS: 1893 (Part I): 2002, Haryana lies in the Seismic Zone IV, which is likely to be subjected to an earthquake of maximum moment magnitude of 7.5 and the same magnitude value has been adopted to evaluate the liquefaction susceptibility of the sites.