Dynamic load test of cast in place pile using a free fall hammer

摘要

The use of high strain dynamic test applied to cast in place piles is growing in the foundation engineering practice in Brazil. This paper presents a single case of the use of this method to assess the bearing capacity of large bored pile, part of the foundation of the new Sao Paulo subway line. The use of a special hydraulic self-propulsion hammer delivering high energy, locally developed, allowed the verification of the parameters required by the foundation design. The dynamic test was conducted according to the common procedure, in Brazil, consisting of the application of variable energy.