October 14 - Dorman Long Technology (DLT) has been contracted by The St Lawrence Construction Group to supply a DL-MT1000 Mega Transporter, as well as a 1,000-tonne capacity 2.5 m jack up system, for a bridge construction project in Canada.
The equipment will be used for handling precast concrete sections for the side spans of the New Champlain Bridge construction project.
The bridge footings and piers of the side spans will be precast on land and then placed into position by a floating crane. The precast footing and pier units weigh up to 1,000 tonnes and are up to 11.37 m high.
The main contractor required a solution for transporting the precast units around the casting yard. The equipment needed to be as compact as a ground level skid system, but as fast as a self propelled modular transporter (SPMT), said DLT.
Standard SPMTs were considered for this project, but were deemed too long to turn within the narrow confines of the site. The DL-MT1000 Mega Transporter was selected due to its high load capacity tyres, which deliver four to five-times the load carrying capacity per axle line of a conventional SPMT, and as a result is much shorter.
The DL-MT1000 is controlled wirelessly by an operator who walks alongside the transporter. It is able to drive around a curve, drive diagonally and rotate about its centre point at a full load speed of 1 km/hr, and an unloaded speed of 3 km/hr.
The 10 m x 10 m x 2 m footings are cast at ground level and will be lifted using the synchronised jacking system, in order to be loaded onto the DL-MT1000. The jack up system uses four 300-tonne capacity 2.5m stroke rams that are synchronised using a DL-P40 computer control system.
The equipment for this project will be delivered in January 2016.
Footing unit being lifted by the jack up system ready for loading on to the DL-MT1000 Mega Transporter.
An 11.37 m pier head unit on the DL-MT1000 Mega Transporter.