Aercap House, a project which commenced in late 2014, was the first significant deep basement project undertaken in Dublin City Centre post the financial crisis. The role of ByrneLooby was to design the basement enabling works to facilitate the construction of the 8m deep excavation as part of the €25m six-storey office development located on St. Stephen’s Green. The basement enabling works were comprised of a bored secant pile wall and proprietary propping solution.
Close proximity to sensitive neighbouring properties resulted in very stringent movement criteria. Movement limits of 5mm were specified by the Engineer. The solution designed by ByrneLooby outperformed this limit, realising as little as 1-2mm movement. This was achieved by designing a stiff wall system combined with a pre-stressed proprietary propping solution. Limiting noise and vibration was also a major consideration. The design prepared by ByrneLooby minimised the requirement for rock drilling, reducing this potential nuisance issue. This was an important contribution towards the success of this project.