Foynes Port West Jetty, Limerick
Project Title:                Foynes Port West Jetty, Limerick
Client:                          Shannon Foynes Port Company Limited
Architect:                     Shannon Foynes Port Company Limited
TPE Consulting Engineering Works:Structural, Civil, Marine, Project Management
Value:                          $15.2 million




Project Description

TPE Consulting Engineers were the Project Managers and Structural Engineers for the development of the west jetty in Foynes Port, Limerick.  The port has traditionally been a commercial port to all sea-going vessels wishing to service the west coast of Ireland.  Over the years it has grown such that in the early nineties, Foynes Harbour Trustees recognized the need to develop a modern deepwater facility capable of handling vessels up to Panamax size.  Planning permission for the works was issued in January 1997, which included new jetty facilities, dredging and provision of port related infrastructure.

Marine and Civil Engineering

Based on pre-feasibility study, TPE Consulting Engineers initiated a preliminary design review that led to the sequence and the extent of the works as follows:

  •  Set up a flow model of the port and carry out situation monitoring prior to completing navigation to determine the best option for new approaches to upgraded berths.
  •  Carry out the new jetty construction works as a single contract including any ancillary works (Installation of new navigation lights etc).
  •  Complete the works with a separate dredging contract. 

Structural and Civil Engineering

Conceptual engineering design concentrated on the extension of the existing West Jetty eastwards for a distance of 164.0m and upgrading of the existing 106.0m jetty.  Following extensive studies and site investigation, it was concluded to disregard the existing structure as a permanent structural support in any new scheme.  For the upgrading of the existing structure, it was decided to pile through the existing deck and to cast a new in-situ flat slab supported on the new piles. 

The structure of the extension is designed as the composite concrete three-span deck spanning continuously between support beams running longitudinally along the length of the extension.  The concrete deck is 550mm thick consisting of 200mm solid pre-stressed concrete slabs topped with 350mm of in-situ reinforced concrete.  The precast beams are 1500 mm wide and 850 mm deep and span from pile to pile.  These piles are 1067 mm outside diameter, with a wall thickness of 25mm.