The liquefaction potential of saturated loose sand lenses in Surabaya east coastal was evaluated probabilistically. The map is a combination of liquefaction susceptibility and liquefaction opportunity. Critical acceleration, the measure of liquefaction susceptibility, was obtained using the simplified empirical method developed by Seed and Idriss (1971) and Liao (1988). This method is based on the empirical relationship between standard penetration resistance and cyclic stress ratio. The liquefaction opportunity is determined by modeling zones of different seismic threat. The probability of liquefaction is computed by comparing the acceleration at the site that required causing liquefaction. Results are expressed as maps of zones of different risk levels and through a normalized liquefaction resistance index of the probability of liquefaction. Over 464 boring logs were examined, showing the soil variability that it was reclaimed land from the sea, swamps, or rivers. The results indicate loose sand lenses have a moderate liquefaction potential.
展开▼
