Predicting the safety factor of ash impoundment against liquefaction

Abstract

Fly ash exhibits poor strength properties and is susceptible to liquefaction when subject to dynamic loading. Coal power plants produce abundant of fly ash and increasing each year. With limited area to dump the ashes, those facilities will raise the embankment which resulted in higher risk of failure due to liquefaction during earthquake. Calculating the factor of safety using cyclic stress ratio (CSR) and cyclic resistance ratio (CRR) are relatively easy, on the other hand, gathering information for CRR depend on laboratory testing or onsite testing which difficult to get the sample, time consuming and expensive. This study shows example of using equation from previous research to predict the CRR by using only CSR value.