On the energy intensity of driving and the bearing capacity of models of pyramidal-prismatic piles

Abstract

The article presents the results of driving and static tests of pile models with different longitudinal shapes, carried out in laboratory conditions. It was revealed that the specific energy consumption of driving a pyramidal-prismatic pile can either exceed or be less than the specific energy consumption of driving a prismatic pile. Unlike pyramidal piles, pyramidal-prismatic piles have less specific energy consumption for driving. Energy costs for driving pyramidal-prismatic piles, as well as their resistance to pressing vertical loads depend on the length of the pyramidal section and rise with its increase. It has been established that, with the same depth of driving and with the same piles, the specific bearing capacity of the pyramidal-prismatic piles is higher than the prismatic piles and less than the pyramidal pile. The revealed features of the behavior of the pyramidalprismatic piles are due to the influence of the longitudinal shape and the length of the pyramidal part of their shaft on the driving process and behavior under the loads.