Contenções periféricas em edifícios caso de estudo: execução de um edifício multiuso na Avenida Julius Nyerere

Abstract

The growing need to occupy more and more underground space, especially in urban areas, combined with the evolution of peripheral containment techniques, means that this subject is very important in the professional life of the civil engineer. This report was carried out at the Toprak company and its case study was the construction of a multi-purpose building with 22 floors for apartments and 6 underground floors for parking on Julius Nyerere Avenue, focusing on the excavation phase and the execution of peripheral containment. First of all, reference was made to the importance of peripheral containments for the construction of underground buildings, their purpose and function. Therefore, in order for excavations to be carried out safely, it is necessary to carry out certain preliminary works and studies, the most important of which are: a study of the surroundings of the construction to be carried out, in which a survey will be made of all the neighbouring constructions, such as buildings, communication routes, among others; geotechnical reconnaissance of the soil, which serves to identify and characterize the types of soil that will be encountered in the excavation. These preliminary studies are important as they help determine the most suitable type of containment.We then move on to study four of the most common methods of peripheral retaining walls: Cast-in-place walls, Berlin-type walls, sheet pile curtain walls and cast-in-place pile curtain walls, where the fields of application and construction processes are described. Reference is also made to some auxiliary retaining structures, such as shoring and anchoring. Finally, a method for choosing the most suitable peripheral retaining wall is presented, taking into account the various parameters discussed above. (TRADUÇAO NOSSA)