Requalificação do sistema de drenagem, construção de um pavimento rígido e construção de uma vala de drenagem em betão, estrada N1: troço Brigada Montada-Zimpeto

Abstract

Road construction is complex and long process that involves several phases, from planning to the application of asphalt sealant and must be carried out in a responsible and sustainable way, considering the benefits for society and environment. Road drainage is a crucial part of the road construction process that requires significant investment for its design and maintenance. However, the absence of this system could double these costs. In this present work, 3 works were monitored with the scope of periodic maintenance carried out on Estrada N1, highlighting: the requalification of the drainage system in the 25 de Junho neighborhood, the replacement of flexible pavement for rigid pavement in Bagamoio neighborhood and the construction of a drainage ditch in the neighborhood of Zimpeto, Maputo city, Mozambique. The intervention in the 25 de Junho neighborhood took place at the interception of Sao Paulo and Sao Pedro avenues with Road N1, driven by the poor performance that the old system had in relation to the current needs of the neighborhood, the need for cleaning work combined with the fact that these the pipes had a diameter of 600mm, wich made cleaning the system difficult. The requalification of the system consisted of exchanging the ducts for the ducts with a diameter of 1000mm in order to better meet current drainage needs and allow for cleaning work when necessary. To this end, a cut was made in the floor to replace the ducts and then the structure of the pavement was restored. The intervention in the Bagamoio neighborhood took place at intersection of Road N1 and Bagamoio’s paved street, with the aim of responding to the problem of water accumulation that occurred in that section in times of rain, and the decision was made to replace the flexible pavement and create a rigid pavement at a level slightly higher than that of the flexible pavement. The intervention in the Zimpeto neighborhood exactly at Coqueiro’s stop next do the CHINA MALL, the drainage ditch was built with the aim of directing the rainwater that accumulated on the N1 Road in this section to the Mulaúze’s River. To carry out these works, the construction procedures in force in the Normas de Execução da ANE, 2015, we observed.