TWO TIER RO-RO RAMP AT BERTH I DUBLIN PORT
This contract was for the construction of a new two tier ro-ro ramp for Dublin Port complete with approach bridges, land reclamation, associated retaining wall and revetments.
The Scope of the work included the demolition of an existing bankseat and restraint structures to the existing linkspan. Reclamation works including an anchored steel sheet piled retaining wall and revetment.
The quay wall is anchored by a sheet piled wall consisting of Larsen LX20 sheet piles with 100mm diameter tie-rods approximately 34M long. The fendering system consists of precast concrete facing units.
Two number composite multi-span approach bridges on piled sub-structures. The weight of the steelwork is approximately 500T. Two number piled dolphins to support the forward end of the linkspan. Scour protection to the bed of the existing berth. And relocation, modification and provision of new fendering and mooring installations.
The dolphins we supported by 26 No. 914mm diameter and 24 No. 762mm diameter vertical and raking tubular piles approximately 30M long. The piles were driven by a HH9 Hydraulic Piling Hammer supported by a 160 tonne crawler crane operating from a 1000 tonne flat top floating crane barge.
The sheet piled retaining wall, with an area of 2100m2 was installed from afloat using a PVE 25M Piling Hammer supported by a 60 tonne crawler crane operating from another crane barge.
The approach bridges were installed using a combination of land based and marine based cranes.
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