Tunnelling Solutions have recently completed the Darebin Rail Underpass (under Darebin and Hawdon Streets in Heidelberg, Melbourne) for the North East Program Alliance - which includes Lang O’Rourke, Fulton Hogan, Jacobs, Metro Trains Melbourne and Level Crossing Authority. 

The construction of an adjacent tunnel next to the existing rail tunnel was provided as a Design and Construct solution for our client.  Total length of the underpass is 70m. 

Differing support types were used to address low cover and proximity to critical services including gas main, water main and various telecommunications.  Support of works included a combination of steel ribs with shotcrete; spile bars; rock bolts; soil nails; and canopy tubes (DN300mm – 9 no. each 36m long). 

Tunnel construction was completed on time with no disruption to the existing rail line and zero settlement recorded on surrounding roads.

The project team have done an exceptional job and must be recognised for this outstanding achievement.  Read below what the Project Manager at North Eastern Program Alliance, Level Crossing had to say:

 

Tunnelling Solutions successfully completed the design and construction of a 70 metre tunnel for the North East Program Alliance. The works were carried out adjacent to a live railway and alongside an existing brick tunnel constructed in the early 1900’s. Their involvement within the early works of the project was invaluable resulting in a design which was constructible and optimised for the ground conditions at hand. The works involved a heading and benching methodology to minimise disturbance to the adjacent tunnel and jacking a series of ~300mm canopy tubes, each approximately 36m long, to enable the support of the crown of the tunnel directly underneath sensitive services such as gas and water. The works were carried out professionally and collaboratively throughout and I would gladly recommend Tunnelling Solutions for any future works.
- Con Anagnos, Project Manager

 

Completed Underpass adjacent Hurtsbridge line (during Occupation)

 

Butor excavating top heading of Underpass

 

Canopy Tube installation, South Portal

 

Akermann drill rig on canopy tube platform

 

Application of spray on waterproofing membrane