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Liffey Service Tunnel
The Liffey Service Tunnel is a service tunnel for various pipelines in Dublin, Ireland, owned by Dublin City Council.
Project
The tunnel was designed by British company Atkins and constructed by a joint venture of the German contractor Züblin and the Irish contractor Cleary & Doyle of Wexford. Its construction took place from September 2006 until October 2008.
Tunnel design
The tunnel is 260 m long and consists of a single bore of diameter 2.96 m. It was built in pipe-jacking using a Herrenknecht tunnel-boring machine and 2.5 m-long precast reinforced-concrete pipes. The tunnel leads from the southern edge of the East Link Bridge, underneath the River Liffey towards the North Quay Wall, approximately 150 m west of 3Arena. The drive and reception shafts are respectively 19 m and 22 m deep, leaving the tunnel passing approximately 8 m below the shipping channel of the river.
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