Probabilistic Evaluation of Earthquake-Induced Liquefaction Potential for Large Region Site Based on Two-Dimensional Gis Technique

Abstract

The empirical equation of cyclic resistance ratio CRR of saturated sands with different probability levels is utilized to evaluate the earthquake-induced sand liquefaction for 2D (two-dimensional) large region site. Based on GIS technique, the evaluation results of earthquake-induced liquefaction potential at the observation boreholes can be adopted as the “elevation” in digital elevation model, therefore the identification of liquefaction locality for 2D large region site can also be evaluated by Kriging interpolation method. The research in this paper shows that: (1) The Kriging interpolation is an effect method for evaluating the latent distribution of the site liquefaction potential beyond the observation boreholes. Thus, it is a preferable way to evaluate the possible liquefaction range for 2D large site. (2) Based on ArcGIS software, the Kriging method embedded in the “Spatial Analyst” extension module can be utilized to evaluate the liquefaction potential of the unidentified points by the evaluated results of the reconnaissance boreholes. Therefore, the 2D distribution map of the liquefaction potential for the large region site can be generated.