SoilStructure Drilled Pier Software is one of the few programs where the engineer can investigate the Geotechnical & Structural Torsional Capacity of the Drilled Pier. A recent study by Oregon Department of Transportation, Final Report, SPR 304-701 was completed on May 2016. This report deals with Geotechnical Torsional Capacity.
The report can be downloaded from here: and is titled “Evaluation of Torsional Load Transfer for Drilled Shaft Foundations” by Studlein, Barbosa & Li.
I have run the 3 examples shown in the Appendix of this report and compared it to results from Drilled Pier Software. Below are my findings:
Case 1: Torsion of Drilled Pier embedded in Sandy Soil:
Case 2: Torsion of Drilled Pier embedded in Clayey Soil:
Case 3: Torsion of Drilled Pier embedded in Granular Fill over Clayey Soil:
CONCLUSION:
The comparison indicates that SoilStructure Drilled Pier Software predicts well when compared with other methods of Torsional Capacity in various soil conditions.