Validity of Juang's Method to Predict the Liquefaction Potential of the Soils of Sablette Algiers

Abstract

This work presents a deterministic and probabilistic analysis of the liquefaction potential of soils. Soil liquefaction is a process leading to the total loss of shear strength of loose sands under seismic stresses by increasing pore pressure. It is accompanied by deformations.

Certain factors related to the characteristics of the ground and the seismic excitation can significantly influence the appearance or not of the phenomenon.

Empirical methods of liquefaction potential assessment are widely used. The probabilistic method has been widely used for estimating the probability of liquefaction. Initially, the uncertain parameters are modeled by normal random variables. A parametric study of the coefficients of variation of the random variables showed that the number of strokes (N1)₆₀ of the SPT test is the parameter that has the greatest influence on the probability of liquefaction.

This study focuses on the liquefaction potential by methods based on the results of the in-situ "Standard Penetration Test"

Through the results obtained in this study of the site of Sablettes in Algiers, in general, there is a risk of liquefaction of the soil in the sandy layers, and we can say that the site studied has an average liquefaction potential. According to the classification of liquefaction potential proposed by Juang et al., (2012).

Keywords. Liquefaction, Interstitial Pressure, Liquefaction Potential, SPT Tests.

Received. Jun 26, 2022. Accepted.February 13, 2023. Published. April 16, 2023