Rail Infrastructure Alliance – Metro Tunnel
Sunbury Line Upgrade
Directionally Drill and Construct 2 CSR Bores (combined Services Relocation) parallel to rail corridor from Hobsons road to South Kensington railway station, passing under Kensington road and all existing infrastructure.
Learn MoreLocation
Kensington Victoria
Client
Metro Tunnel
Pipe
125mm SDR 13.6 HDPE conduits
Geology
Cat C – Coode Island Silt
Length
> 500 m
Each bore had a horizontal change of alignment over a smooth radius to destination and had a vertical radius of up to a maximum of 8.9 meters while crossing Kensington road.
The bores consisted of 13 x 125mm SDR 13.6 HDPE conduits over the required bore length of 150 meters , conduit lengths being 152 meters
Highlights:
Challenges – Tracking of the pilot due to interference – Skills, knowledge, experience and planning by the team resulted in delivery as per design
Highlight- Delivery well before program timelines, knowing all the planning and hard work resulted in a positive outcome
RIA Staff – excellent to work with – preparation and daily support of the highest level
Project Value:
Delivered a bore per 2 shifts
Bore 1 : Day 1 pilot , Day 2 ream and install conduit configuration to bore
Bore 2 : Day 1 Pilot , Day 2 ream and install conduit configuration to bore
Program delivery dates – met earlier than programmed
Scope/Required:
- High water table
- Coode island silt
- Cat C soils
- High interference levels
- Restricted zones
Number of ppl required / team:
Average team of 7 personnel
Techniques required, materials required:
Construct using Vermeer D60 x 90 Horizontal Directional Drill
Digitrak F5 Falcon Tracking system
Defined Mud mix to suit known Geological Conditions
Adequate water and Mud mix resources to permit consistent supply as required upon demand
Ample Vacuum Trucks to ensure smooth transfer of drilling slurry to Tip site without incurring delays to process
Special purpose tooling – reamers
Skilled Team
Precise planning pre commencement