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AIL Group Partners team up on Nammuldi project.
When Atlantic Civil Products Pty Ltd, our Australian Partner in the AIL Group of Companies, needed to convince a client/consultant that a large two-lane heavy haul road arch system could be constructed over an existing twin track rail line and two adjacent access roads without traffic interruption, two compelling factors sealed the deal. Our Group's extensive experience designing Super•Cor® deep corrugated steel plate structures for use under extreme live loads and our project history building the Stockton, UK railway arches under similar traffic constraints.
An accelerated delivery plus some bells and whistles.
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 at Atlantic Industries Limited?s Dorchester, New Brunswick plant, complete components were shipped in September and arrived in Australia by 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 (2,825,173 ft3) of earthworks took 38 days. 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.
About our Partner, Atlantic Civil Products.
Atlantic Civil Products Pty Ltd, of Townsville, Queensland, is our Australian Partner in the AIL Group of Companies. Like Atlantic Industries Limited, Atlantic Civil Products develops, designs, manufactures and delivers innovative products and expertise for the civil, mining, forestry and transportation sectors. They operate both fixed and mobile manufacturing facilities across Australia and deliver quality-assured infrastructure solutions throughout Australia, New Zealand and the Pacific Islands. For more information on Atlantic Civil Products, follow the links from our web site.
Project-at-a-glance:
Nammuldi Lens E & F Haul Road Crossing, Brockman 2 Iron Ore Mine
Rail tunnel specifications:
Super•Cor® Arch HA 68S with Ribs
Span: 13.6 m (44' 7")
Rise: 9.8 m (32' 2")
Length: 82.4 m (270' 4")
Road tunnel specifications:
Super•Cor® Arch SC 54S
Span: 11.4 m (37' 6")
Rise: 7.2 m (23' 6")
Length: 80.8 m (265' 4")
Minimum/Maximum
Engineered Backfill Cover:
2.6 m (8' 6") / 5 m (16' 3") at a density of 27.0 kN/m3
Live weight load:
Up to GVM 390t
Design Service Life:
At least 50 years
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