ATS/AGS/ICE/ASTT jointly presents this in person and online Hybrid Technical Event.

Overview

Thornlie Cockburn Link (TCL) project consists of a new railway line between the Armadale and Mandurah lines via the Thornlie and Cockburn Stations. The track extension from Thornlie to Cockburn is approximately 14.50 km.

To make way for the major construction works, a 12.6km of existing BP KWOL (Kewdale White Oil Line) required to be relocated which is situated within the narrow brownfield railway corridor.  The works consists of 11.5km of Horizontal Directional Drilling (HDD), two 50m microtunnelling/pipejacking crossing operational PTA passenger and Arc freight rail, 1km of open trench, 120m steel truss river crossing, 2 pigging stations and 12 valves and associated valve pits.

This presentation will dive into how the determined team have overcome several design and construction challenges and safely delivered the project; these includes:

• Resolved design issues and obtained stakeholder approval on key design elements of the project including Design package submission in compliance to the railway requirement, narrow right of way within the active railway corridor, Canning River Pipeline Crossing, Cathodic Protection and Voltage Mitigation,
• Completed 12 Horizontal Directional Drilling (HDD) drill shots up to length of 1.4km and depth of 25m within the railway corridor parallel to the operational rail, in many cases near residential properties, 12 months of drilling works included eight months of 24/7 works with two drill rigs,
• Recovery of stuck drilling operation, using two drill rigs from either end,
• Recovery of a Micro Tunnel Boring Machine (MTBM) during the Easter break un-der the existing Thornlie Passenger Line and live Arc Infrastructure freight rail,
• Installation of a truss bridge over the environmentally and culturally sensitive Canning River site during night-time PTA passenger rail possessions in October 2022, using a 750T crane and specially manufactured remote-controlled counter-weight,
• Installation of 12 Main Line Valve (MLV) pits along the alignment with some of them as close as 500mm to the existing bp KWOL pipeline.
• Successful completion of the works leading up to the pipeline cut over date com-mitted 6 months in advance and carried out the critical golden welds during the shut ensuring the successful commissioning of the new line and handover of the new asset.

Event schedule:

Networking and light refreshments: 17:30 – 18:00 (AWST).

Technical presentation: 18:00 – 19:00 (AWST).

Q&A and networking: 19:00 – 20:00 (AWST).

Speaker