This project involved the replacement of an under-track culvert on the Limerick to Tuam rail line with 4 new 2.4m x 2.4m precast concrete box culverts. The works were carried out in a short time frame of just 36 hours in order to facilitate a the re-opening of the railway line. The works carried out included ground-works, precast installation, waterproofing of units, installation of gabion units and relaying of railway tracks.
This project consisted of the replacement of existing viaduct over the Multeen River, Dundrum, Co.Tipperary with a new 3 span deck. The 3 no. 12m double track decks were cast on-site to incorporate new steel bridge structure ( supplied by IR ) and lifted into position during 36 hour TIII Possession using 1,100t mobile crane ( supplied by IR ). Each lift was approximately 150t. Ancillary works included Eliminator & Hytec waterproofing, bridge joints details and sealing same, coring existing masonry abutments and installation of 32mm dia 1.50m long dowels, grouted in position to receive new decks.
Please follow link below to see video of the construction process:
The existing bridge OB702 was widened to take the skew out of the road. The overbridge comprised of Opti-Cadre units and reinforced earth abutments.
The bridge was widened to the Claremorris side by approximately 10.5m while leaving the existing structure intact and maintaining traffic flow. The reinforced earth walls were constructed with little interference to the existing passing traffic and the railway line. Other works included palindine fencing, high level safety barrier and road surfacing. The work was necessary to create a straight road across the railway line to enable all local traffic to traverse the bridge safely. This project was the first of its type to use Opti-Cadre units to extend an existing bridge.
please follow link below to see installation of precast concrete portal frame:
At this site Existing Level Crossing’s XE128 & XE129 were closed and replaced by a 4.50m x 4.50m internal dimension under-bridge, 20m long. The under-bridge was a contractor designed structure.
500m long new access roads were also constructed The installation of the under-bridge took place over 2 days, from 7.00 am Tuesday 16th of June 2009 to 6.00pm on Wednesday 17th of June 2009. The under-bridge is made up of 15no U shaped duct units each weighing approx 20t (i.e. 8no base units and 7no top units). A 350 ton crane was used during the installation both for lifting /replacing the track and also for installing the units.
On day 1, the track was removed, excavation completed, and preparation of base for unit’s. On day 2 the precast units were installed. All sealants and waterproof membranes installed and completion of stitches between units together one erection of temporary handrails.
Please follow link below to see video of precast units being lifted into place: