The City Reach Boardwalk Maintenance Project was situated between 145-175 Eagle Street, the City. It included the demolition and removal of sections of the structure which were in very poor condition, then reconstruction using precast concrete panels. The boardwalk is a reinforced concrete structure suspended approximately one metre above the high tide level of the Brisbane River in the Brisbane CBD. Due to the confined nature of the site and limited access, all lifting works took place using a barge mounted crane positioned in the river adjacent to the site, with demolition works on the structure restricted to small equipment due to strict load limits.
The new walkway panels were transported on trucks from Victoria, loaded onto the barge at the Port of Brisbane and floated up the river to the site. Once lifted into position the pavers, garden boxes and stainless steel balustrading were reinstated and the boardwalk reopened to the public.
The second part of the project required concrete repairs and cathodic protection to sections of the remaining structure beneath the boardwalk including pile caps, beams and deck panels. Tidal variations limited access to the underside of the structure, submerging some of the repair areas for much of the day. Small boats and pontoons were used to gain access beneath the structure and maximise working time between tides. A protective coating was then applied to prevent further corrosion and extend the life span of boardwalk.
Specific Issues and Challenges: