Special Engineering Difficulties (SED’s) Civil Works
The company has specific expertise in developing innovative solutions for Special Engineering Difficulties (SED’s).
This photo shows the solution which was developed for a multi-duct crossing of a shallow deck masonry arch bridge. The non-structural covering was removed and the multi-duct array was incorporated in a reinforced grid which was then concreted to provide an improved and strengthened bridge deck.
This canal crossing had to be carried out without draining the canal thereby preventing the use of open-cut excavation. A directional drill profile was designed and the crossing was completed without disruption or damage to the canal.
Crossing of the River Liffey was achieved by the use of pipelining techniques involving the installation of a 450mm diameter carrier pipe containing 12 no. 110mm diameter telecoms ducts. Agreement had been reached with the ESB to reduce river flows to a low level and the work was completed within one day.
Rock drilling technique was used to cross underneath the Cork-Dublin railway line. The tight confines of the site required the use of steel sheet piled coffer dams to enable the pipe drill to work at the required depth.