Análise da capacidade de carga e recalque das fundações de um edifício em solo da região de Uberlândia/MG

Abstract

The good performance of a deep foundation system, in the case of continuous flight auger pile, is associated with the load capacity and settlements against the demands, durability and safety under any subsoil condition. For the preparation of a foundation project it is necessary to carry out the prediction of the load capacity assigned to the piles. The study of the load capacity of the piles can be done from theoretical methods and/or semi-empirical methods. In this work, the superstructure was designed and the loads were obtained so that, later, the pillars with greater load were designed and dimensioned by means of the load capacity and settlement. In this way, the two most requested blocks of three and four piles were analyzed. It began by checking it’s dimensions with the help of the CypeCAD 2018 software. Later the efforts in the trellis elements idealized by the strut-and-tie models were processed. Additionally, the armature was dimensioned and the compression tension was verified in the connecting rods, which had the dimensions carefully analyzed. By means of semi-empirical methods, the load capacity of isolated pile was calculated using the methods of Aoki & Velloso (1975), Décourt & Quaresma (1978) and Teixeira (1996), which are based on SPT and CPT tests. Subsequently, calculations of load capacity for pile group were made by the method of Terzaghi & Peck (1948) apud Poulos & Davis (1980), from the concept of "equivalent pier". Finally, the Whitaker (1957) method presented values that more closely approached the conventional rupture load. The settlement, of the isolated pile and pile group, was analyzed based on the methods of Poulos & Davis (1980) and Cintra & Aoki (2010), the latter adapted to a prediction of group settlement. The results of the permissible load capacity and settlement for group of continuous flight auger piles have been satisfactory and are shown in detail in the form of charts and tables.