Leighton Contractors, Transurban’s preferred contractor for the Hills M2 Upgrade Project, contracted UEA Trenchless to perform the horizontal directional drill (HDD) conduit installations. The works were undertaken at the Windsor Road eastbound on-ramp, and at the Pennant Hills Road east and west on- and off-ramps.
On a typical workday, the Hills M2 is used by more than 100,000 vehicles and over 27,000 bus commuters, so minimising disruption to traffic was paramount in deciding on the method of installation. For this reason, the project was technically challenging with construction taking place under a live motorway.
To overcome these challenges, UEA came up with innovative designs and safe construction methodologies, including introducing a wire-line tracking system as part of the directional drilling process that elimainates the need to stop the flow of traffic. A Vermeer D100x120 was used for the installation.
The Hills M2 motorway plays a key role in Sydney's orbital network, linking the north-west region to the lower North Shore and Sydney's central business district. The upgrade will significantly reduce congestion in peak periods and improve access to major growth areas along the motorway.