Project 20 – Hunter River Bridge, Muswellbrook NSW.
Project Description : Roller Rehab Bridge Bearing Service. Bearing rust removal, external and internal cleaning, painting, greasing, oiling and fitting of metal covers to fixed pivot bearings.
Heavily rusted rocker bearing covers removed from the bearings were no longer water tight.
Once the covers were removed the rusted nest of rockers were visible. The picture on the left shows the debris which had entered through the holes of the cover. This debris is also compacted into the oil bath. This ballast and rubbish would eventually inhibit movement and seize the bearing.
The bearings were cleaned and de-rusted by non abrasive means so as not to disturb the lead based undercoat. All components looked in tact and free once they were internally cleaned.
A recess in the bottom plate of the bearing serves as an oil bath to lubricate the bottom of the rockers. This bath was filled with debris and water.
Once de-rusted, cleaned and painted the oil bath was pumped full of grease to prevent water filling it.
Fixed end pivots de-rusted and painted & the rocker bearing fully serviced and awaiting cover replacement.
Pivot with the custom designed protective cover fitted. Galleries on the pivots were very dry. Once cleaned they were oiled with a penetrating oil then greased.
This bottom flange on this slide plate bearing has delaminated with rust separating the bronze sole plate from the steel upper. De-rusted painted and oiled slide plate bearing.
Project 19 – Glennies Creek Bridge, Singleton NSW.
Project Description : Roller Rehab Bridge Bearing Service. Bearing rust removal, external and internal cleaning, painting, greasing, oiling and fitting of metal covers to roller bearings and fixed pivot bearings.
Span 4 abutment showing roller bearings choked with ballast and coal. This bearing was in serious danger of being damaged if not rectified. The steel covers now fitted will prevent this from re-occurring.
Coal and Ballast deposited on top of other roller and pivot bearings other than the abutments of the structure.
Debris between the rollers prior to servicing.
Typical roller bearing condition after being pressure washed. Rollers were visually inspected after cleaning to ensure they were totally clean before painting and greasing.
Painted oiled and greased roller and pivot bearings. Note marking on the roller and top plate to gauge future movement.
Image looking down on the bearing, showing the long keeper plate is straight, fixings are in tact and rollers evenly spaced. The rotation of rollers was compared to the set on the opposing pier.
Before and after. With covers fitted ballast and coal can no longer enter the bearings. The covers will also ensure grease remains clean and moist until the next scheduled service.
Project 18 – ARTC at Chilcotts Creek, Kankool
Project Description : Roller Rehab Bridge Bearing Service. Bearing rust removal, internal cleaning, painting, greasing and oiling. Report on service and any defects identified.
Bearings on both abutments were covered in ballast which was removed prior to servicing. All ARTC bridges we have serviced have lead based undercoats which is still in reasonably good condition considering the age of the structures. When lead is apparent we use ultra high pressure water blasting and Action Gel (no abrasives) which removes top coat and rust and leaves the undercoat in sound condition. If painting the structure in the future we would recommend this preparation prior to painting.
The girders on spans 2 and 3 are out of alignment as shown. The bearing below mirrors this i.e. one girder flange has a considerable gap between it and the bearing whereas the other flange is tight to the bearing. These are the same bearings where the concrete beds are cracking after previous epoxy repairs. It would appear the movement of the girders is tending to twist the bearings, causing the defects found in the concrete beds. We recommend monitoring this movement and rectifying when appropriate. This should preserve the concrete beds.
The northern approach to the bridge is on a bend. Trains coming from this direction are fully laden with coal. (Generally empty when they return) Beyond the bridge is the start of a gradual rise into the Liverpool ranges. The girder movement is consistent with the heavy loads rounding this bend and tending to list. Perhaps a review of speed limits can be considered until girders are re-aligned.
Girders have been marked and dated so engineers can gauge future movement. Bearings de-rusted, inspected, painted oiled then greased.
Cracks in the concrete beds on bearings under spans two and three are apparent. The bottom flange of one of the girders within the bearing is tight the other girder has a 10mm gap. It would appear this action of twisting on the bearing has caused cracks to appear and open up.
Project 17 – Wet’n’Wild Super 8 Aqua Racer
The heavily rusted frames were unbolted and craned down.
The whole frame was then water/grit blasted to identify which areas needed to be repaired.
Then, the heavily rusted sections were cut out and new plates were welded in.
It received a prime coat and was ready for the top coat. The Frames were top coated and put back into service.
PROJECT 16 – BURNETT RIVER BRIDGE BEARING RUST REMOVAL, INTERNAL CLEANING, PAINTING, GREASING, AND OILING
Along the approaches there are small plates which appear to connect both the free expansion end and the adjoining fixed end of beams. A new walkway has been bolted to one side of the entire length of the structure. Whilst the handrail appears to have allowances for movement.
PROJECT 15 – CONCRETE TREAD REPLACEMENT WET ‘ N WILD
PROJECT 14 – QLD RAIL
Rust removal and application of protective coatings to heavily rusted Brookes Street Bridge, Fortitude Valley
PROJECT 13 – RAMADA MARCOOLA BEACH QLD
Refurbishment of rooftop penthouse shade structures at the Ramada Resort.
PROJECT 12 – SEA LIFE SYDNEY AQUARIUM
Refurbishment of large dugong and shark tanks at the Sydney Aquarium.
PROJECT 11 – POLLY’S MOTEL
RUSTED STEEL DOOR FRAME REPAIR
PROJECT 10 – TWEED SHOPPING CENTRE
Corrosion Removal and Application of Corrosion Protection (Dexus Property Group)
PROJECT 9 – ‘LA ORANA’ BEACHFRONT RESIDENCE
Anti Corrosion Service on the Award Winning Beachfront Residence, Salt Estate Northern NSW
Action Corrosion provide this servicing to domestic homes, which are generally proximate to the coast. Every two years we return to check on our coating and apply new coating to new fixtures and fittings.