As part of the Port of Melbourne’s ALWC (Accelerated Low Water Corrosion) protection program, Freyssinet were engaged to design, install, commission and monitor an ICCP (Impressed Current Cathodic Protection) system to protect the submerged sheet piles at Webb Dock East Berth 1.
This berth is used daily by ships transporting goods between Victoria and Tasmania and normal shipping operations were maintained throughout the works.
A bespoke access system was used to work within the narrow space between the wharf face and the berthed vessels.
Diving works included underwater welding and installation of all submerged ICCP components.
Additional protection to anodes subject to thrust was designed to ensure long term operation under harsh conditions.
The installation included sourcing the electrical supply from the adjacent wharf approximately 230m away. The current is then distributed from Transformer Rectifier Units (TRU) along the wharf within a PVC cable tray system to reduce the risk of corrosion and provide longevity.
Port of Melbourne Operations
ARUP & AW Maritime
Nov 2018 to Jan 2020
Appleton Dock Wharf, Pavement and Fire Rehabilitation
Appleton Dock was constructed in the 1950s and consists of pre-cast concrete beam-slabs supported on timber piles and a cast in situ concrete relieving platform with an integral concrete sheet pile wall supported on precast concrete piles. The deck is overlayed with asphalt to provide a trafficable surface and the old sheds were demolished and removed, leaving a concrete floor. The terminals are currently used to handle break-bulk cargoes, dry bulk and containers.
Condition inspections and surveys of the wharf structure and terminal pavements identified the need for rehabilitation works to maintain acceptable levels of service. Freyssinet's works included rehabilitation of Appleton Dock Berths B, C, D & E above and below the wharf, including the installation of a new fire main, redundancy of the existing fire main, pavement repairs, timber pile repairs and concrete repair.
Freyssinet as Principal Contractor self-performed project management, delamination testing, concrete repair and encasement grouting works.
Other specialist activities included fire main removal and installation, asbestos removal, concrete demolition, sawcutting, concrete pouring, asphalting, diving, reinforcement welding and crane lifts.
Freyssinet undertook complex program optimisation to work safely and efficiently around daily live shipping and stevedoring activities.
Central Highlands Water
Jun 2018 to Oct 2018
Daylesford Low Level Basin Remediation
The Daylesford Low Level Basin was constructed in 1966 and is part of the potable water delivery system for Daylesford, Victoria. The basin is constructed in ground with a reinforced concrete liner on the floor and sloping walls. An upgrade on the Basin was completed in 1996 including the installation of a steel clad roof.
Ongoing issues with the basin’s water tightness through previously repaired concrete joints lead to the requirement for remediation. An HDPE liner was specified for installation on the concrete liner to improve water tightness. Inspections on the basin also identified defective coating and corrosion on roof members.
Freyssinet was engaged to complete the remediation on the structure including the installation of a new HDPE liner and roof refurbishment.
Installation of geofabric and HDPE liners over existing basin concrete liner.
Installation of access system to facilitate roofing works.
Roof sheeting removal and reinstatement including approximately 300 lineal metres of new purlins, 25 new bridging members, new roof cladding and ventilators.
Locally applied epoxy based steel coating system.
Disinfection of basin and hydrostatic testing following remediation works.