Aplicação de métodos para dimensionamento de estaca raiz embutida parcialmente em rocha - Estudo de caso

Abstract

It is known that it is essential to use piles for support in any type of work, to ensure its safety and stability. During the execution of this type of constructive element, it is common to encounter obstacles and interferences, such as foundations of old constructions in the place or the presence of rock masses, which demand that it is necessary to embed the piles in rock, the rotary drilling process or embedded in rock. Such a process requires the use of certain specific types of piles, such as the root pile, bored piles, drilling “in loco” and injected, performed by means of rotary or roto-percussive drilling. In this sense, in this work, a study was carried out on the different methods for calculating the bearing capacity of this type of pile, as well as applying these methods in a real case of work to evaluate their coherence in the prediction of the bearing capacity of root pile under these conditions. Thus, it was analyzed through a load test result, compared to the results obtained from each analyzed method. Based on the results of the analyses, it was found that all the methods analyzed overestimated the bearing capacity of the pile embedded in rock, and on average this estimate was 150% higher compared to the conventional ultimate load. However, the method based on rock properties presented the best estimate which was only 39% higher compared to the reference value obtained in the static load test.