Analysis Of The Performance Of Cfa And Omega Piles: Executives Aspects.
(Almeida Neto, José Albuquerque de)
Analysis of the performance of CFA and omega piles: executives aspects.This research work presents an Analysis of the performance of CFA andomega piles, with emphasis on the influence of execution processes. Areview of previous work is presented, showing the constructionevolution of these piles, it?s execution process and relevant aspectsconcerning the correct execution of these piles, as well as materialproperties effecting on it?s behavior, execution effects on thepile-soil system and an analyses of the influence of the pile?s tip onit?s performance. Three cases of foundation works are shown. First ofall, a piled foundation in which CFA piles were changed to omega piles,due to alterations in the concrete properties. After that, an omegapile execution on Vila das Belezas subway station is shown. At last, aninteresting case of CFA piles as a retaining wall, on Luz subwaystation, where proximity old buildings restrained the choice ofretaining methods. A comparative analysis of the performance of omegaand CFA piles, based on load tests, is also shown, as well as ananalysis of the unexpected behavior of an omega pile tip, based on aninterpretation of load test and Cambefort?s R parameter. In addition tothis, the predict methods of bearing capacity, the methods ofextrapolation of the load-settlement curve and the methods of theseparation of the shaft friction and the end bearing, which were usedin the performance analysis of the piles, are also presented.
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