A Coates Hire jacking solution was recently employed to lift up the Merrylands Railway overpass bridge to carry out repairs on the bridge’s bearings.
Coates Hire has previously supplied its hydraulic lifting technologies for projects ranging from a bridge lift in Sydney to lifting the roof of Ausgrid stadium in Newcastle.
Their sound engineering capabilities were recently on display again when a Coates Hire jacking solution lifted up the Merrylands Railway overpass bridge and then propped it up for several weeks whilst the bridge’s support bearings were being replaced.
The railway overpass bridge connecting Neil and Mombri streets in Merrylands caters for thousands of cars every day. Coates Hire was called upon to supply hydraulic cylinders for the lift and develop a unique propping solution to complement the cylinders for the repair work on the bridge.
Product Specialists Michael Broome and Steve Veld had an initial meeting with RailCorp for the supply of cylinders only. The client intended to weld a frame together with structural steel and then proceed to jack off that platform.
Coates Hire offered an engineered solution utilising the Coates Hire System 60 propping system combined with their range of Enerpac hydraulic cylinders. Michael Broome came up with the initial concept, assembled a prototype and asked RailCorp to assess its suitability.
A Pivot-Arm Hoist and scaffold attachment was used to transport the gear up the side of the tower.
Since the project involved replacing the bridge bearings, Enerpac RC1006 hydraulic cylinders were utilised at eight lifting points to take the load off the bearing and lift the bridge up slightly. At this stage the props were extended to support the load of 14 tonnes at each point with a substantial safety factor taken into consideration.
Once the preparation of the new headstock was complete, the new bearings could be safely installed whilst the propping secured the bridge. The set-up of the propping and hydraulic system on the project took two days with one day used for the setup of the equipment and the second day for the lift with Coates Hire on site to provide assistance and support with the gear.