Análise de critérios de dimensionamento de carga em dutos de concreto instalados em vala na situação de recobrimento mínimo.

Abstract

In various engineering situations, empirical formulations of design, based on field data and professional experience which highly define the subjective nature of the standard design methodology, are used. This paper discusses the various methods of obtaining the stresses generated in buried pipelines, which are subjected to static and dynamic loads, and their subsequent re-evaluation by numerical modeling with Plaxis 3D program. The non-conventional analytical methods were compared with the standard method of calculation and it has demonstrated good accuracy even without considering other factors such as soil cohesion and deformability. The numerical modeling demonstrated the conservatism of the Marston method and subsiding of the prism spread due to local effects caused by the adoption of minimum cover and high dynamic overload and due to how the use of two classical methods favor reasonable results. A classic modified method that would allow a closer approximation of the load was also proposed.