• Griffith Road Retaining Wall

  • During heavy rains in December 2010, a significant failure of the approach embankment to the Newport Bridge on Griffith Road occurred. In order to repair this breakdown, and to mitigate any future occurrence, Moreton Bay Regional Council initially installed sheet piles to arrest further erosion and AllenCon was engaged to construct the permanent works design.

    Construction began in April 2011 with the excavation of the saturated plastic clays and preparation of the work site including soil nailing and shotcreting to temporary excavations.  In order to provide a suitable working zone, an all-weather piling rig was established on the unstable slope to enable safe installation of 150 pre-cast piles.

    As part of this flood repair project, an 80m long pile cap was cast insitu and the construction of the concrete wall, revetment walls and ‘ConCrib” retaining walls were undertaken. This product was selected due to its open web construction and use of free draining material that provide both long-term durability and a resistance to rotting or warping.

    Client: Moreton Bay Regional Council | Value: $1.3M

  • The proximity of the site to the heavily utilised road required the implementation of extensive traffic management procedures.  The works were undertaken directly adjacent to the Newport Marina and Griffith Road where the existing road shoulder surfacing, kerb and channel were also replaced. AllenCon carried out contra-flow traffic measures on the opposing side of the median in collaboration with the Queensland Police, local authorities and executed the works under all necessary work permits.

    Provisions for bus and heavy goods vehicle movements were also undertaken together with pedestrian management and detours.

    Despite experiencing a slow start due to poor weather and bad ground conditions the project was completed on-time, within budget and with minimal disruption to the local community.