Projects
CLIENT: | Department of Water, Monadelphous, Stockland |
LOCATION: | Gladstone, Queensland |
COMPLETION DATE: | 2011 |
The Wiggins Island Coal Export Terminal (WICET) is a coal export terminal located at Golding Point, Gladstone, in Queensland, Australia.
Upon completion, WICET doubled the coal export capacity at its port. Stage one construction included a rail receiver facility, overland conveyors, stockyard areas for 1.9 million tonnes of coal (including the overhead gantry stacker), materials handling and sampling station, single berth (including the ship loader), wharf and substation. The first coal shipments through stage one of the terminal started late 2014.
DBM Vircon provided modelling and detailing services for 3 main areas of the project (Stockyard Overhead Gantry Stacker, Jetty & Wharf Structure, and the Ship Loader) and additional services for engineering and erection services for the gantry and stackers.
Stockyard Overhead Gantry Stacker
DBM Vircon provided modelling and detailing services for the Stockyard Overhead Gantry Stacker. This unique stacker design consists of a central raised gantry, ~900m long, supporting the feed conveyor, rails and walkways. On either side of the gantry (east and west) is a ~130m long (total 260m) and ~25m high moving bridge structure to precisely stack the coal in piles up to 18m high over a 22-hectare area. This bridge structure included:
In addition, to ensure correct operation of this large complex piece of machinery, many virtual checks were carried out for clearances as the stacker moved along the gantry and in its varying positions of operation.
Jetty & Wharf Structure
DBM Vircon provided structural detailing for the jetty and wharf structures including:
Working closely with the design team at Aurecon and with Monadelphous, DBM Vircon modelled all water piping, electrical services and equipment to ensure they could fit on the structure, and ensure maintenance access was achievable after construction. Modelling all these services also ensured all the necessary supports and bracketry were applied to the structure during fabrication in a safe and controlled environment, rather than on-site in an exposed environment. This considered items like positioning the lighting, safety requirements, substations, control rooms, anti-corrosive aids, cable ladders etc.
Ship Loader
The Ship Loader located on the wharf is a large piece of machinery that can take coal from the conveyor and transfer it into the ship’s hull for transport. DBM Vircon not only provided modelling and detailing services for the main structure of the ship loader machinery, but also worked closely with the design team at Aurecon to model all necessary services a large piece of machinery required. This allowed the ship loader to be fully fitted out before being commissioned on the wharf. These include:
In addition, to ensure correct operation of this large complex piece of machinery which sits over the water, many checks were carried out for clearances as the ship loader moved along the wharf and in its varying positions of operation.
Engineering and Erection Services for the Gantry and Stackers
Working with the WA Department of Water, Monadelphous and Stockland, DBM Vircon’s scope included the design and detailing of the lifting frames for the ‘undressed’ east and west stacker bridge, stacker legs, central carriage and tripper for inshore lifting of the bridges. The stacker bridge lifting study included the design and detailing of the lifting frames for the stacker bridge.
DBM Vircon then carried out the transportation study and temporary supports for John Holland to modify the design of the frame to allow the bridge to be transported over land, provide supports while the bridge was dressed and allow lifting of the fully dressed bridge into the final position.
“The largest individual structure to be built at the Wiggins Island Coal Export Terminal has been successfully lifted into place at the WICET coal stockyard. The 780-tonne lift and installation of the western stacker bridge was completed…Work began with 750 and 1100-tonne cranes lifting the bridge structure into place, 25 metres above the stockyard floor. The stacker bridge is 11 metres wide and 125 metres long, and will comprise an integral part of the terminal’s coal in-loading infrastructure, providing the support and housing for the shuttling conveyor and telescopic chute which will deliver coal across the stockpiles.”
From the article ‘Monster lift puts 125 metre-long bridge in place at WICET‘.
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