Soil liquefaction analysis – Liquiter

Liquiter allows the acquisition of CPTU data from the Pagani G.E. control unit (TGAS / CPTU-ACQ system).
Imported data are automatically processed for lithology identification according to the Robertson method. Data import is performed through Stratigraphy Tab → Import Stratigraphy, which automatically generates the stratigraphic profile. The procedure ensures fast and reliable integration of CPTU tests into the calculation model. In addition, the Priebe method for liquefaction risk mitigation and the Seed and Idriss method, based on relative density and fines content, have been implemented.

LIQUITER is a software for analysing and calculating soil liquefaction processes among the most complete and tested in the world.

Liquiter supports the following field tests for soil liquefaction analysis:

• • Standard Penetration Test (SPT);
  • Tests that calculate the shear waves velocities (Vs);
  • Cone penetration test (CPT);
  • Cone penetration test electric (CPTE );
  • Cone penetration test Piezocone (CPTU).
  • Grading curve

Magnitude Scaling Factor (MSF)

• • Seed & Idriss,1990;
  • Idriss, 1995;
  • Andrus & Stokoe, 1997, 2000;
  • Idriss & Boulanger, 2008, 2014.

Stress Reduction Factor (Kσ)

• •  NCEER (Youd, 1997).

Shear Wave Velocity Normalization with Depth

• • Robertson et al., 1992.

SPT Correction (Cn)

• • Liao and Whitman, 1986;
  • Idriss & Boulanger 2014.

Post Liquefaction Residual Strength (Sr)

• • Idriss & Boulanger, 2009, 2014.

Fines Content Correction

• • Idriss & Seed, 1997 (NCEER Workshop);
  • Robertson & Wride, 1997 (NCEER Workshop);
  • Idriss & Boulanger, 2014.

Calculation of liquefaction safety factor using:

• • Andrus-Stokoe;
  • Boulanger-Idriss-CPT-2008;
  • Boulanger-Idriss-CPT-2014;
  • Boulanger-Idriss-NSPT, 2014;
  • Corte;
  • Eurocode-8;
  • Finn;
  • Iwasaki;
  • Robertson-Wride;
  • Seed-Idriss 192-1985;
  • Tokimatsu-Yoshimi;
  • Youd et. al., 2001;
  • C. Hsein Juang 2006.

Lateral Spreading

• • Youd et. al., 2002;
  • Barlett and Youd, 1995.

Consolidation interventions with gravel columns.

• • Priebe’s method 1998

Liquefaction potential index (LPI)

• • Iwasaki et al.;
  • Somez (2003).