Liquefaction Potential Calculator

Evaluate soil liquefaction risk during earthquakes based on SPT data and seismic parameters

Input Parameters

Earthquake Parameters
Soil Layer Parameters
SPT Parameters
Correction Factors
LPI Options

Results

Factor of Safety (FS)

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Enter parameters and click calculate

Liquefaction Potential

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LPI will be calculated when enabled

Detailed Results
Parameter Value Description
Corrected N60 - Energy-corrected SPT N-value
(N1)60 - Overburden and energy corrected N-value
CSR7.5 - Cyclic Stress Ratio (M=7.5)
CRR7.5 - Cyclic Resistance Ratio (M=7.5)
MSF - Magnitude Scaling Factor
Kσ - Overburden Correction Factor
rd - Stress Reduction Factor
Interpretation Guide
Factor of Safety (FS) Against Liquefaction
  • FS ≥ 1.2: Liquefaction unlikely
  • 1.0 ≤ FS < 1.2: Marginal case, further analysis recommended
  • FS < 1.0: Liquefaction likely, mitigation measures required
Liquefaction Potential Index (LPI)
  • LPI = 0: No liquefaction hazard
  • 0 < LPI ≤ 5: Low liquefaction hazard
  • 5 < LPI ≤ 15: High liquefaction hazard
  • LPI > 15: Very high liquefaction hazard