Ferrycarrig was engaged by John Holland to undertake a portion of the works for the upgrade of Stage 2 of ‘More Trains, More Services’ service improvements to vital rail corridors including the T4 Illawarra and T8 Airport lines.
The Next Rail partnership is fulfilling the contract between Central and Hurstville with a program of works including upgrades to rail infrastructure such as signaling, track, and power supply.
Ferrycarrig has undertaken two main scopes, firstly to install an HV feeder pit under a complex FRP scope and secondly to install CSR works for the project including a challenging under bore under numerous vital water, communications, and electric assets.
The HV Feeder pit was composed of three separate pits that will feed the new substation for the T8 Airport Line. It entailed a complex excavation alongside numerous assets including Sydney Trains HV assets in challenging ground conditions. Ferrycarrig’s project delivery team inserted specially engineered shoring boxes for a prolonged period until the FRP top slab was formed and ready to pour
This pit was fed with approximately 10km of 200mm HD conduits which also fed the new substation. Services such as HP gas, HV electrical assets, and vital communication assets for Sydney Trains had to be considered when excavating trenches around them.
The import of energycrete also required close attention from the project management team.
Some of the key challenges regarding the pit design were ensuring accurate RLs alongside the top of the base slab, challenging ground conditions, and a complex reinforcement schedule.
A close relationship was maintained with vital suppliers to ensure that all materials were of suitable quality.
As with all Ferrycarrig projects, our approach to achieving high-quality and efficient project outcomes is through working directly with our clients to resolve issues and add value. Any issues were identified early and resolved without any impact on the budget or program.
The project team’s experience and problem-solving approach were key to resolving numerous design issues in a short timeframe and delivering a high-quality program of work as a result.