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LiqSVs is a software program for the assessment of soil liquefaction based on field data acquired by Standard Penetration Test (SPT) or Shear Waves velocity Vs. The calculation procedure invoked is divided into the following five steps:

 

1. Field SPT, Vs data are used for the evaluation of Cyclic Ratio Resistance (CRR) which is the soil "strength".

2. The seismic load is expressed through Cyclic Stress Ratio (CSR).

3. Calculation of factor of safety against liquefaction.

4. Estimation of post-liquefaction induced settlements.

5. Estimation of the overall liquefaction potential.

 

LiqSVs implements the most commonly used calculation methods for both CSR and CRR, NCEER and Boulanger & Idriss 2014. However, it should be noted that the results of these methods should be used according to the engineering judgment of the user and taking into consideration the risk that is implied.