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FORRESTFIELD AIRPORT LINK PROJECT

The Forrestfield Airport Link in Perth is a A$1.9B project carried out by the GFWA-Trevi Australia JV.
The project will deliver an 8.5 km extension of the existing urban rail network connecting the Midland Line, just past Bayswater Station, to Forrestfield, running underground in twin bored tunnels underneath the Swan River, Tonkin Highway and Perth Airport.
In April 2016 the Public Transport Authority awarded the design, construct and maintenance contract to Salini-Impregilo (now WeBuild) - NRW Joint Venture.
The project comprises the design, construction and maintenance for 10 years of the Forrestfield-Airport Link, which will connect the growing eastern suburbs of Perth with the existing suburban rail network as well as the airport.
By 2021 the line is expected to generate 20,000 passenger trips on the network every day it will also reduce road traffic and travel times.

Trevi scope of works:
Jet Grouting
The Jet Grouting soil improvement technique was an allotted work for Trevi Australia.
The scope of work includes the installation of jet grouted columns to create a consolidated block in correspondence with the cross passages, having both structural and hydraulic purposes, in order to allow the safe excavation of the connecting tunnels.
 
Artificial Ground Freezing
The Artificial Ground Freezing soil improvement technique was an allotted work for Trevi Australia.
The scope of work includes the application of a soil-improvement technique, having both structural and hydraulic purposes, to create a consolidated block in correspondence with the cross passages in order to allow the safe excavation of the connecting tunnels.