Ireland

Dublin Port Tunnel

overcoming poor ground conditions was essential for the success of this project

ByrneLooby were temporary works designers for the cut and cover sections of the 4.5km Dublin Port Tunnel.

The twin tunnels are primarily for HGV traffic and were constructed through a combination of boring and cut and cover techniques.

The ground conditions were especially challenging and variable consisting of a mix of made ground, boulder clays, gravels, silts and significant deposits of land filled domestic refuse.

Our designs involved stability solutions for the slopes along the cut and cover sections including designs for soil nailing, gabion retaining walls, bored pile walls, groundwater lowering and open cut slopes as appropriate following an inspection and review of each slope.

Scope of Project

  • Design of temporary works for the cut and cover sections of the 4.5Km tunnel.
  • Role involved the inspection, review and stabilisation of numerous slopes.
  • Slope stability solutions included soil nailing, gabion retaining walls, bored pile walls, groundwater lowering and open cut slopes dependent on the nature of the slope.
  • Variable and challenging ground conditions along the length of the tunnel required a mix of stability measures.

Project Photos