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Nammuldi Mine
Keeping the trains and trucks running during construction of triple Super•Cor® arches.
Heavy Haul Road Crossings, Pilbara Region, Western Australia.
When Atlantic Civil Products needed to convince a client/consultant that a large two-lane heavy haul road arch system could be constructed over an existing rail line and two adjacent access roads without traffic interruption, two compelling factors sealed the deal: our extensive experience designing Super•Cor® deep-corrugated steel plate structures for use under extreme live loads, and; our Group’s project history building the Stockton, UK railway arches under similar traffic constraints.
All construction took place within a very tight schedule and without interruption to the 24-hour rail and road traffic.
The project specified that the components be delivered and assembled according to a very tight schedule and include imbedded electronic monitoring. The contract was awarded August 28, 2006 and, following manufacturing and trial assembly, complete components arrived on-site in November, well ahead of the planned summer, 2007 construction window. Starting on June 13, the first road tunnel went up in 7 days, while the subsequent rail tunnel took 18 days and the second road tunnel took only 11 days. Engineered ramping and backfilling of approximately 80,000 m3 of earthworks took 38 days.
The project called for an accelerated delivery plus some bells and whistles.
All construction took place without rail or road traffic interruption for a practical completion date of August 28, 2007. The design incorporated the installation of strain gauges, pressure plates and a data logger to the exterior of the rail tunnel.
