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Melbourne Metro Rail (Parkville)

Client :

APA_Group_(Australia)_logo

Project Date

2017

Length

1.0Km

Pipe Diameter & Type

300mm, 180mm, 150mm, 100mm

Construction of approx. 1,000M of DN300 Steel high pressure gas pipeline for APA group as part of the Melbourne Metro Rail enabling works.

Construction of approx. 1,000M of DN300 Steel high pressure gas pipeline for APA group as part of the Melbourne Metro Rail enabling works. Pipeline installation included construction of DN300 pipeline on Flemington Road (night works) and a 180m horizontal directional drill underneath the Haymarket roundabout. Works also included 10 cut and caps to decommission existing gas mains in Grattan Street with pipe sizes ranging between DN450 and DN100. National Australian Pipelines also installed various short sections of steel and poly pipe work ranging between DN180 and DN63 to maintain gas supply to Melbourne University and the Parkville hospital precinct. Commissioning of the new gas lines and capping of existing lines included a number of hot-taps and live welding works to ensure supply was maintained throughout the construction operation. The construction of the gas pipelines in the metro area resulted in crossing over existing services and interfacing with a number of stakeholders and other contractors.

Major activities

Major activities undertaken for this project included:

Provision of construction management plans for the pipeline including; Health and Safety Plan, Site Environmental Management Plan, Quality Plan.
Provision of Traffic Management Plans.
Fulltime traffic management on project through construction of the pipeline.
Site setup and survey of pipeline alignment.
Identification, potholing and recording of over 200 crossing existing assets and utilities using along the pipeline construction alignment.
Excavation of trench to ensure pipeline installation at a minimum cover of 1200mm to the top of pipe.
Cartage and disposal contaminated spoil given Cat C classification of the Parkville precinct.
Welding of the steel 300mm X52 steel pipe and non-destructive testing (NDT) on 10% of mainline welds.
Stringing and laying of welded steel pipeline using a CAT 21 ton excavator and throughout metro Melbourne streets including Flemington Rd, Grattan St, Pelham St and Bouverie St.
180m horizontal directional drilling underneath the Haymarket Roundabout on Flemington Rd to install DN300 steel gas main. HDD construction conducted as night works to avoid disturbance to traffic and nearby hospitals.
Night works construction for pipeline installed on Flemington Rd and Grattan St to avoid disturbance to local traffic and community.
Backfilling of pipeline using APA approved materials and asphalt reinstatement of entire pipeline alignment to VicRoads and council specification.
Pigging, gauging and hydrotesting the new main to a minimum pressure of 1500kpa in accordance with the APA specification in the contract.
10 cut and caps to decommission existing gas mains in Grattan Street with pipe sizes ranging between DN450 and DN100.
Commissioning of the new gas lines and capping of existing lines included a number of hottaps and live welding works to ensure supply was maintained throughout the construction operation.