Monorail Removal Project - Review of Environmental Factors (REF)

• removal of contractor’s equipment and facilities• reinstall signs removed from Monorail columns• reinstall ‘stop don’t walk’ signal and power feed• reinstate below-deck access ways• removal of all temporary works supports• replacement of any damaged pavers at western-on ramp resulting from Monorail removalworks• make good bridge deck surface that may have been damaged from Monorail removalworks• removal of rubbish• cleaning up of site• removal of temporary fencing.Phase 6 would involve returning the cabin to its original location (described below).5.6.2 Removal strategyRemoval of structural steel elements (Monorail and support columns)The conceptual methodology for these works would be similar to that described under workcomponent 2, in section 5.3. It is noted that there are three types of columns on the bridge,which would require slight variations to the methodology.Removal of hydraulic ramsTo enable the swinging section of the Monorail track to remain free to rotate at all times prior tothe actual removal of the beams, temporary vertical props would be installed to secure thebeams onto the bridge deck. This would enable the hydraulic jacks to be removed whileallowing the track to swing with the bridge span prior to its removal.It is possible to remove the hydraulic equipment through the penetrations left in the deck fromthe removal of the box-seat containers (within which the rams are currently disguised). It isanticipated however, that there is a substantial quantity of structural steel associated with theremoval of the rams. As a result, a barge may be used for removal from below.Reinstatement of the bridge control tower and braking systemThe bridge cabin is an original component of Pyrmont Bridge that was moved approximately sixmetres to the east of its original location to accommodate the Monorail. It is proposed torelocate the cabin to its original position. It is also proposed to reinstate the bridge’s mechanicalbreaking system that was disengaged to accommodate the Monorail.Reinstatement of truss members at Monorail column locationsHerringbone bracing was previously located at the Monorail support columns, prior to theconstruction of the Monorail. The tie bolts were cut and left in place, and still exist at the columnlocations. Works to the truss members would involve reinstating the timber sections andprovision of new tie bolts.Repairs to anchor holes in timber membersThe bolt holes remaining from the removal of the base plates off the timber members can beplugged with a suitable epoxy infill.38 | GHD | Transport for NSW - Monorail Removal Project REF