The project concerns the Pre-Feasibility Study for a roadway between Greenville and Zwedru, in the Republic of Liberia, with a total extension of 185km, which aims to upgrade an unpaved road to a primary standard road, accessible in all-weather conditions.
The expected results of the upgrading roads will be a maintainable and safe road, with a life cycle of 20 years, that will ensure an extreme benefit to the local areas, namely a healthcare and education improvement.
Due to the necessity of exporting the iron ore and the inexistence of alternative connections with the ports, an additional option was studied, in which there were used road trains, carrying approx. 200 tonne of iron ore, 5 times a day.
The site visit comprehended a complete track monitoring along the road, where it was also possible to perform an effective analysis of the general road conditions.
Special emphasis was taken in the aspects related to the geometric alignment, to the drainage elements (structural and hydraulic conditions), the soil capacity and bridges’ structural conditions.
The main goal of this study was to provide to the client, Odebrecht, a feasible list of quantities and general scope of the necessary works in order to allow a correct cost estimation of the project for the Feasibility and EPC phases.
The studies encompassed the preliminary design of earthworks, pavements, alignment, drainage and structures along the road, for normal traffic and heavy hauling traffic options. It included the definition of a geological-geotechnical and a topography survey plan.