Análise das vibrações geradas pela cravação de estacas em obras da cidade do Recife.

Abstract

The choice of the type of foundation when intending to build a real estate development is extremely important since its execution and nailing can interfere with neighboring buildings both in the disturbance of daily life with the generation of vibrations and sounds and in the issue of structural impacts on homes. neighbors. These factors lead to a series of legal disputes between the construction company and neighboring residents. The present work aims to study and analyze, through tests carried out in situ using the geophone device, the acceleration of particles in a medium in the directions: longitudinal, sagittal, and transversal, which are expressed in Peak Particle Velocity (PPV) and frequency. These measurements were carried out in several works, called case studies, located in the city of Recife and Metropolitan Region (Ipojuca), Pernambuco. Each case study contained a type of pile and execution to be measured, named: precast concrete pile, metal pile, root pile, mortar pile and continuous flight auger. With the aid of the geophone, measurements were carried out at a certain safe distance from the execution equipment. The results and values of peak particle velocity and frequency were analyzed and compared with current international standards and other existing case studies. It was found that precast concrete piles and the method using a hydraulic hammer presented the highest values of peak particle velocity. Regarding frequency, root-type cuttings presented the highest values. It is worth noting that even though they did not obtain the highest particle peak value, the metallic type piles also obtained significant values in terms of their peak particle velocity.