Controle executivo de estacas raiz a partir de medidas de campo

Abstract

During the execution of the foundations of buildings, the evaluation of the failure load is commonly determined by specific methods, which vary depending on the type of pile. The control of root piles are usually executed by load tests. This paper proposes an empirical formulation for prediction of failure load of root piles, using some variables that are monitored during the execution of the piles, using a digital speedometer. Therefore, slow static load test in three root piles monitored with diameters of 350 to 410 mm were conducted. Several combinations between portions of end bearing load capacity, side friction load capacity, and the monitored variables, were tested using computer programs as Excel and Maple. Afterwards, an equation for the prediction of the failure load of the piles tested was estimated, as a function of the monitored variables, according to polynomial relations, exponential, logarithmic and linear combination, referencing to the value obtained in Van der Veen’s method (1953). It was found that there is a correlation between the failure load and the monitored variables, and the results obtained by the proposed equation were concordant with the reference values for the tested piles.