渭河某城市防洪大堤地震液化分析和评价

Under the condition of earthquake, the most important reason for the soil liquefaction are the reduction of effective stress and the rapid growth of the pore water pressure which has no time to dissipate. Here, the standard penetration test and finite element method are both applied to analyze and evaluate the earthquake liquefaction of the urban flood control embankment of Wei River. The three-dimensional finite element model is built on the basis of geological structure, geologic stratification and groundwater distribution of the embankment, and simulated results of the embankment during earthquake are obtained of the distribution of maximum acceleration response, the growth of pore water pressure and the variation of liquefaction zone. It is shown the foundation of the embankment will liquefy in some domain under 8 degree earthquake intensity, and some engineering treatments should be implemented.