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CLiq is software for the assessment of soil liquefaction using CPT/CPTU data. CLiq was developed in collaboration with Gregg Drilling & Testing Inc., a leading company in site investigation and CPT, and Professor Peter Robertson, author of the method used in the software.

CLiq provides users with an easy to use graphical environment specifically tailored for CPT and CPTU data.  This new software addresses advanced issues such as cyclic softening in clay-like soils and thin layer/layer transition zone detection.  CLiq provides results and plots for each calculation step, starting with the basic CPT data interpretation through to final plots of factor of safety, liquefaction potential index and post-earthquake displacements, both vertical settlement and lateral displacements. CLiq provides consistent output results by applying the state-of-the-art methods (e.g. Youd et al, 2001) along with the calibrated procedures for post-earthquake displacements (e.g. Zhang et al 2002 & 2004).