Abstract
Liquefaction phenomenon is one of the most important problems in engineering that occurs in saturated sandy soils during earthquakes. In this phenomenon, pore water pressure increases up to confining pressures. Hence the effective confined pressure becomes zero and the soil doesn’t have any shear resistance, so the soil mass will be unstable and much destructive. In this paper, the liquefaction potential of Tabriz Urban Railway Line 2 (TURL2) according to Standard Penetration Test (SPT) has been evaluated. Evaluation of liquefaction potential based on SPT method is the latest methods offered by Idriss-Boulangr (2008), and is used to calculate the soil liquefaction, and have compared the results with Japanese Highway bridges method. In this research, the data of more than 100 boreholes were evaluated and calculated for designed basic earthquake with magnitude 7.5. The safety factor for liquefaction was evaluated by two methods for several boreholes at different depths and the liquefaction risk potential indexes were determined along TURL2. The analysis results obtained by both methods are compared for 2 boreholes, as a sample. The analysis results show that at some horizons along TURL2, liquefaction will happen during strong motions.
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