This Project involved installing a new precast concrete box culvert consisting of 9 units 2.1m x 1.8m totaling 18m in length. The culvert was laid adjacent to an existing culvert on the R358 station road, Ballinasloe. A road closure and diversion was put in place to facilitate the works which were carried out in two phases in order to maintain pedestrian access for residents. The river was dammed either side of the new culvert location and the water pumped out before excavation works commenced. Sheet piles were driven in order to support sides of the excavation while the culvert foundation base was prepared and units lifted into place with 90 ton hydraulic mobile crane. There was also numerous services contained within the road including a telecoms junction box, 2 x watermains and a foul sewer line all of which had to remain operational and protected during the works.
Tag Archives: precast installation
OB702 Roscommon Bridge Widening & Road Alignment
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:
https://www.conneelybuilders.com/video-gallery/?catid=cat1&slg=ob-702-roscommon
Noone’s UB121, Rineen, Gort, Co. Galway
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:
Spencer Dock Platform Works
Construction of Platforms and access stairs from existing roads at new Dockland’s Rail Station. The station was designed of elements that would permit the station to be moved from its current temporary location to its permanent location at a future date. There were many elements to this project such as vibrocompaction to the existing ground to increase bearing capacity for foundations of platform precast units each weighing 27tonne. It involved the piling of all foundations to support ground beams and main building portal frame. Construction of buffer stops, installation of pumping station, surface water attenuation system, associated drainage and services at Spencer Dock, Dublin 1.
Geoghegans OBE 151a
This project involved the closure of two number Iarnród Eireann Level Crossing’s. The crossings were replaced by a single overbridge and associated approach embankments. The overbridge comprised of a contractor designed structure and contractor designed reinforced earth wing walls. Construction of the new Overbridge consisted of Precast Optri-Cadre units each weighing 36 tonnes and included precast concrete parapet units. A new access road with concrete post and wire fencing was constructed over a length of 1,200m to tie into the existing public road at one end and farm access road at the other end.
Havertys OB158A
This project involved the closure of three number Iarnród Eireann Level Crossing’s. The crossings were replaced by a single overbridge and associated approach embankments. The overbridge comprised of a contractor designed structure and contractor designed reinforced earth wing walls. Construction of the new Overbridge consisted of 11.50m wide Precast Optri-Cadre units each weighing 36 tonnes and included precast concrete parapet units. The existing level crossing gates were taken down and closed to traffic. The new road was 4 metres wide with concrete post and wire fencing, and constructed over a length of 650m to tie into existing farmer access roads.
Caherduff OB142A
This project involved the closure of two number Iarnród Eireann Level Crossing’s. The crossings were replaced by a single overbridge and associated approach embankments. The overbridge comprised of a contractor designed structure and contractor designed reinforced earth wing walls. Construction of the new Overbridge consisted of 11.50m wide Precast Optri-Cadre units each weighing 36 tonnes and included precast concrete parapet units. The existing level crossing gates were taken down and closed to traffic. The new road was 4 metres wide with concrete post and wire fencing, and constructed over a length of approximately 1,000m to tie into existing public roads.
OB132 Bridge Renewal, Ballinasloe, Co. Galway
The existing metal deck bridge was replaced with a precast concrete bridge. The works involved the removal of the steel bridge , placing of precast bedstones, beams and retaining wall units. Installation of an Aluminium Bridge parapet , double height crash barrier , fencing, road surfacing , telecom and water diversion. The bridge was assessable to traffic after four days.
Bridge Renewal Project OB121, Ballinasloe, Co. Galway
The existing metal deck bridge was replaced with a pre-cast concrete bridge. Works included removal of the steel bridge, placing pre-cast concrete bed stones, beams and parapet walls. Diversion of existing services, extensive retaining wall structures with faced gabions, permanent fencing, pre-cast concrete safety barriers and accommodation works for local residents.
Level Crossing Replacement Works & Cattle Crossing
At this site Iarnród Eireann Level Crossing XE46 was replaced by a single Overbridge and associated approach embankments, access roads and drainage. The Overbridge comprised of contractor designed structure and reinforced earth abutments.
Newbridge Station Accessibility Works
Renewal of a Railway Overbridge OB-67
This project involved the renewal of a railway overbridge OB67, Clarecastle, Co Clare on the Limerick / Ennis line. The works consisted of the demolition of the existing bridge deck, stone arch and the provision of containment approach walls. The works involved the placing of a new deck of precast pre-stressed beams with precast concrete parapets and precast concrete retaining walls. The works involved substantial site set up and clearance adjacent to the existing deck and approaches.
