CLiq uses established empirical correlations to estimate geotechnical parameters for basic data interpretation. It also allows the user to modify constants that are essential for the liquefaction calculation procedure. These input parameters are applied to each single CPTU file in the current project, giving the ability to perform analysis with different set of parameters for the various files. In order to preview and/or modify the calculation parameters, first select a CPTU file and then from the CPT Data tab select the Analysis properties command. The following dialog will appear:
Liquefaction assessment parameters dialog
The dialog presents various sections where the user may alter calculation parameters. For more details click on the section name are presented below:
If you need to set these parameters to all CPTU files in the current project, click on the Apply to all button (this will result the dialog to close and CLiq will recalculate all CPTU files). When done click on the OK button to close the dialog. Please notice that the software will try to automatically recalculate the selected CPTU file and will prompt for an answer:
Calculation of a CPT file
Answer Yes to the above dialog if you must recalculate the basic interpretation of the CPTU file e.g. if you have altered the cone area ratio or the thin layer detection algorithm. If you answer No the software will use the current interpretation to perform the liquefaction calculation. If you are not sure about your answer always click on the Yes button. If your answer is Cancel then no calculation will be performed but the changes made to the liquefaction calculation properties will not be lost.