St. Stephen's Green

Canada House

REDUCING NOISE AND VIBRATION IS KEY TO THIS CITY CENTRE PROJECT'S SUCCESS

Canada House, a project which commenced in late 2014, was the first significant deep basement project undertaken in Dublin City Centre post 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.

The project presented a number of challenges due to the site’s location being a city centre development. The site’s close proximity to adjacent multi-storey office buildings and neighbouring properties, as well as the restricted space available for the proposed development, meant there was very stringent movement criteria specified. Tight movement tolerances of a maximum of 5mm were specified by the Engineer. ByrneLooby outperformed the client’s requirements, achieving as little as 1-2mm movement, by designing a very stiff wall system combined with a pre-stressed proprietary propping solution.

Due to the large amount of rock drilling potentially required, the noise and vibration was a major consideration for the project. The design prepared by ByrneLooby minimised the requirement for rock drilling in order to reduce the potential nuisance issues. This was a defining criteria in the success of this project.

STAFF INSIGHT

"Opportunities to work on projects such as Canada House have developed my knowledge and understanding of the cutting edge technologies and systems available for deep basement construction. In conjunction with the main contractor, McNamara Construction, I developed a propping regime using high capacity Groundforce propping solutions, which I hadn’t used extensively previously.”
Maurice, Principal Engineer
ByrneLooby

 

Project Photos