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n Civil Engineering = Siviele Ingenieurswese - Nacala rail corridor (Section 2) : projects : international category
Vale Moçambique Limitada's Nacala Rail Corridor project is being constructed to provide a new route for product to be transported from its Moatize coal mine in Tete to the new port at Nacala in Mozambique. The newly completed Section 2 forms part of this railway corridor and starts at Moatize, covering a length of 62.5 km to the border of Malawi. Aggressive implementation time frames saw innovative modular bridge designs being introduced to ensure that constructability would be fast-tracked. The rail line crosses numerous rivers, streams and watercourses found typically on the flat plains in Mozambique. With such fat topography, difficulty arose with the diversion of water flowing through the works. Due to the nature of the watercourses and the flat gradients, the rainy season would see continual flooding, hence the bridge deck designs were engineered to span the water with precast concrete beams. This was subsequently changed by the contractor who instead opted to use steel girders and cast the beams in situ. Three cast-in-situ culverts were substituted with Armco culverts which were found to be cheaper and quicker to construct.
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