Main Menu

You are here

Dublin Port Tunnel

NATM support works
Estimated cost: Commencement:
December 30, 2001
Completion date:
December 29, 2005
Technical data:

Bi-directional two lane road tunnels encompassing 5.6 km area. Total tunnel lenght: 4.5 km, TBM bored lenght: 2.4 km, each tube at 11.7 m diameter, Cut & Cover: 1.5 + 0.6 km.

Geology description:

Dublin Boulder Clay (lodgement till), carboniferous argillaceous, limestone bedrock.

Geology types:
Bid cost: Final cost:
£385 million GBP
Service areas:
Construction methods:
Tunneling under:

The Dublin Port Tunnel is an approximately 3.5 mile long twin, two-lane tunnel which connects the M50 motorway and Dublin Airport with Dublin Harbour. The underground connection will help to manage the rising traffic demands and will carry up to 20,000 vehicles per day upon opening. The overall scheme consists of 2.8 miles of tunnels, where 1.3 miles are Cut-and-Cover and the remaining 1.5 miles are TBM bored 35ft.

Cut & Cover at Alfie Byrne Road
TBM Launch Pit
Formworks for Cut & Cover Section
Construction of Reception Shaft
Open Face TBM
Single Pass Lining Installation