Estudo de capacidade de carga de estaca raiz em solo arenoso - caso de obra: ponte sobre o rio Ronuro, no estado do Mato Grosso

Abstract

Reinforced concrete bridges and viaducts require special foundations, whether superficial or deep. Widely used, deep foundations require excavations through piles and/or pipes. Each project has its own distinct assessment, based on which part of the structure will transfer stress and how much the soil can withstand. Soil layers of different types and intrinsic characteristics, including the existence or not of a water level, a level that varies according to the location, climate and season of the year, must be analyzed and studied, through geological prospecting, which will define what the appropriate depth must penetrate the foundation in order to support all the requests arising from the structure. In this Course Completion Work, the geotechnical load capacity of root piles in sandy soil is studied from the soil data of the project in execution of a bridge of reinforced and prestressed concrete, with about 140 meters of extension and 8 .8 meters wide. This bridge is located in the city of Paranatinga, in the state of Mato Grosso, and will cross a section of the Ronuro River, on the MT-130 highway. It will have about 96 units of root cuttings when completed. In the study, the methods of Aoki & Velloso, Décourt & Quaresma and Cabral are employed. It appears that the Décourt & Quaresma method presents lower geotechnical admissible load values, being more conservative and in favor of safety when compared to the Aoki & Velloso and Cabral methods, for the root pile situation in sandy soil.