Comparativo entre o método destrutivo e o método não destrutivo na execução de um emissário: estudo de caso

Abstract

This study aims to evaluate the technical and economic feasibility, as well as the reduction of impacts on the urban environment, by adopting non-destructive methods in the construction of a sewer line in the city of Santa Luzia/MG. To achieve this, the characteristics, execution methodology, and applicability of both destructive and nondestructive methods were analyzed. The destructive method involves the opening of trenches and the breaking of the existing pavement to install pipes in sanitation works. This process causes several disruptions to traffic, potentially even causing interruptions, while non-destructive methods aim to preserve the pavement and significantly minimize these inconveniences. A case study was conducted on a local paved road, where the non-destructive method was applied for the execution of the work. In this study, two distinct methods were compared: one destructive and the other non-destructive, using HDD (Horizontal Directional Drilling), considering cost, execution time, social and environmental impacts, as well as planning, quality, and management aspects. The cost comparison showed that the destructive method has a cost approximately 5% higher than the non-destructive method. Additionally, the execution time of the non-destructive method was nearly half that of the destructive method. The social and environmental impacts were also reduced with the nondestructive method. Furthermore, significant improvements were observed in the areas of planning, quality, and management during the execution of the works using the nondestructive method.