CPeT-IT can perform basic calculations regarding direct pile bearing capacity calculation form CPTU data, using the Bustamante and Gianaselli (1982) method (LCPC method). The LCPC CPT method is recommended since it provides simple guidance to account for different pile installation methods and provides good estimates of axial capacity of single piles. A more detailed description on the procedure can be found here.
After you have selected a CPTU file from the CPT file Manager click on the pile calculation tool button 
. The following dialog will appear:
Pile bearing capacity dialog
The software can perform the LCPC method using solid or pipe piles. Pile properties may be accessed by clicking on the Pile details button. The following dialog will appear:
Pile properties dialog
Pile type can be either solid or pipe. When a pipe pile is selected from the Pile type drop down list, the Wall thickness edit box will be enabled. According to the type of pile you must make the appropriate selections regarding the group of the pile for both bearing capacity factor and friction coefficient. Click on the OK button to commit the changes.
Calculations will be performed according to a depth step entered in the Calc. every edit box. The allowable capacity for the pile will be calculated based on the defined factors of safety for both the tip and shaft resistance. To perform the calculation click on the Calculate button. The results will be displayed as shown in the next pictures:
Calculation results (plots)
The bottom axis of the pile bearing capacity plot can be customized in a way similar to the one described here. The depth scales are the same as the ones used in the Basic plots for Tip resistance.
Calculation results (numeric)
By default the calculation of the friction coefficient performs a check for the restrictions defined by the LCPC method. If you wish not to include these restrictions during the calculation process uncheck the Apply fp restrictions check box.
After the calculation is complete you may preview and print a report by clicking on the Report button.
Pile bearing capacity report
A single pile load-settlement plot can be generated by selecting the Settlements Calculation Data tab and providing the required user input variables. Clicking on the small Calc. button will refresh the settlement calculation based on the entered values.The load-settlement plot can be viewed by selecting the Load vs Settlement tab. Appropriate selection of the displacements to reach peak Qs and Qb is crucial in the calculation process.
