Owing to the increase in traffic from the M50 into Dun Laoighaire and the increase of urban development in South County Dublin, the interchange at Wyattville was upgraded. This interchange facilitates a traffic fl ow of 50,000 vehicles a day and is the second busiest section of motorway in Ireland.
The new Wyattville overbridge runs East to West over the N11 South Eastern motorway. The overbridge consists of two piled cast-in-situ concrete abutments with a similarly constructed central pier carrying 30 metre long precast concreted bridge beams.
We were contracted by Jons Civil Engineering Ltd to install 640mm diameter ODEX cased rock socketed piles to carry the two abutments and central pier. A total of 114 No. 640mm ODEX piles were installed to an overall average depth of 26 metres including an average rock socket of 4 metres.
