Abstarct: Liquefaction is an evidence that occur in loss sands during earthquakes imposing lots of damage to structures and foundations. each year This phenomenon will bring thousands of human lives in to damage and impose huge costs to the country’s economy. We also experienced This kind of life and financial damages in rudbar earthquake in Iran. But the most important factors that affects the liquefaction are water table, soil density, soil properties and excess load. More over the foundation type is another factor in increase or decrease of damages. In this study first we argue about nonlinear modeling of laxyered soils, then we measure the settlement of rigid foundations that has occur by the earthquake and then we will monitor the effect of water table, density increase and also the effect of laxyers depth in presence and absent of pile, with deferent type of soils (include liquefiable and nonliquefiable soils). The bam records and the flac Itasca 7.00.411 software, has been used for this modeling. In the end, the results have been compared with seed and iwasaki methods and also they has been compare with novoliq software and liqIT software results, and the new boundaries for liquefaction in the intense earthquakes has been modified.