Two approaches for analysis of the dynamic pile bearing capacity via pile driving formulas

Abstract

Piling is considered the most cost-efficient solution in deep foundation structures, and it involves many modern-day solutions in every field, such as modern-day materials and construction equipment. However, analysis of pile bearing capacity that includes evaluating of soil conditions and its mechanical properties is relatively new compared to piling itself. Pile bearing capacity depends on two factors – the strength of the structural element itself and the resistance of the soil around the pile. This resistance must be enough to avoid excessive displacements, rotations and other movements that make the superstructure unstable. The structural strength of the pile itself could be determined, though soil resistance is affected by many factors. One of the pile bearing capacity establishment methods is pile driving formulas – equations that establish pile bearing capacity considering set per blow and hammer impact energy. However, given establishment approach is considered unreliable and out of date, although this approach has several advantages – fast execution and minimum additional equipment required. Paper deals with two approaches for analysing the dynamic pile bearing capacity via pile driving formulas and correlation establishment between dynamic load test and static load test. In paper correlation between both dynamic pile bearing capacity approaches and static load test is established.