This project consisted of a flood defence barrier approx 1.4 km long protecting over 100 households in the Ballinasloe area. The works involved construction of a reinforced concrete flood defense wall consisting of the installation of steel sheet piles using Movax piling hammer with welded joints & a 600m reinforced concrete pile cap. The remainder of the flood defence barrier was achieved with the construction of an 800m impermeable clay bund. The project included installation of aluminium flood gates & controlled pen-stocks in existing and new chambers, construction of culverts and head walls, construction of drainage system to rear of flood barrier with over pump chambers as well as the construction of V ditches and cleaning of existing field drains in the surrounding area.
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.
Upon inspections by Irish Rail, significant subsidence of a railway embankment near Foxford was discovered.
Remedial works were required to stabilise the railway line, consisting of a sheetpiled wall for 160 metres on both sides of the railway line. The approved piles were imported from Asia in 16 number containers into Dublin Port and hauled by road to Foxford Station. The contract was completed entirely with the company’s own plant and resources. The main equipment consisted of a piling rig compromising of a Movax SPE 50 piling hammer fitted on a Case CX210 25 tonne tracked excavator, specially fitted with rubber tracks for railway work. The piles were hauled to the remote site location using two atlas 1504 rubber ducks with rail wheels and tilt rotating encon hitch & McCabe grab towing two 5m x 20TN rail trailers. The piles were loaded at Foxford station by a Case CX160B excavator fitted with rotating grab. The piles were driven to depths of between 7 metres and 13 metres The piles were supported with a waler beam on both sides and tied across using 40mm threaded bars at 4.5 metre centers. The works were carried out at night during TIII possessions with the railline remaining operational each day for passengers and freight traffic.
Please follow link below to see Movax Piling Hammer in action on Ballinasloe Flood Defence project: