We’ve been providing consultancy services for immersed tube tunnels
in many countries around the globe for over 25 years, with
commissions extending from feasibility studies and tender designs
through to full detailed design and construction supervision.
Sydney Harbour Tunnel in Australia incorporates a
960m immersed tube comprising eight reinforced concrete units
between Milsons Point and the concourse west of the Opera
House Thanks to the wide spectrum of engineering skills
available within Mott MacDonald, we can provide a fully integrated
team of specialists to take care of every aspect – from the initial
marine-based soil surveys, the conceptualisation of structural
layouts, dredging, environmental impact and shore protection, and
marine structures through to the final designs of terminal
buildings, ventilation and associated mechanical and electrical
services, and landscaping.
For numerous customers, including contractors and public
authorities, Mott MacDonald hasdesigned steel and reinforced
concrete immersed tube tunnels carrying utilities, roads and
railways. Our roles have ranged from the early planning and
environmental impact studies, through detailed design and
construction supervision and maintenance. We have worked for both
the owner and contractor on design-and-build projects – the
favoured contractual form for immersed tube tunnels.
Notable Mott MacDonald immersed tube tunnel projects include:
Medway Tunnel’s three 126m long, 24m wide, 9.4m
deep immersed tube units were designed to be watertight without an
external membrane
- Medway Tunnel, UK
- Pulau Seraya cable tunnel, Singapore
- Bilbao Metro, Spain
- Sydney Harbour Tunnel, Australia
- Euroroute proposal, UK/France
- Jack Lynch Tunnel, Ireland
- Tuas cable tunnel, Singapore
- Songkhla Tunnel, Thailand
- Shanghai Ring Road, China
- Third Hampton Roads Crossing, USA
Jack Lynch immersed tube tunnel in Ireland’s city
of Cork was built using a partially on-line casting basin
