Nant Pibwr culvert is a triple bore masonry culvert structure carrying the Up and Down main lines between Fishguard and Swindon, Carmarthan, South Wales. The structure comprises of three side by side masonry arch culverts founded on masonry abutments and spandrel walls over a length of approximately 28m. There were areas of defective joints and spalling masonry throughout the length of the culverts and visible signs of general dilapidation. The culverts accommodate a tidal river flow of varying depths which often exceeds the culvert capacity and floods the surrounding pasture land. A concrete lining was attached to the culverts to improve the structural integrity and the smooth flow of water.
Category: Sectors
Charing Station Footbridge
To introduce cost saving efficiencies within their own organisation, Network Rail engaged Barhale through the NR route team, as part of the Kent Route Project DIME, rather than using the traditional NR Infrastructure Projects route. This was the first time that this project management route had been implemented.
The scope of the project was to construct a new steel footbridge within Charing Station to replace a life expired Exmouth type structure; the scope included its demolition/ removal following the successful installation of the new bridge.
Design and build project from GRIP stage 3 to 8 and involved gaining planning approval for the repositioning of the new bridge from the district council. Barhale working closely with our designers Tony Gee & Partners, the design we developed incorporated BCS fabrication’s extensive experience of fabricating steel footbridges.
The new bridge was scheduled to be installed and the existing concrete structure dismantled during a 57 hour OROR possession 21st to 22nd September 2013. This date was successfully met.
Chatterton Water Tower
As part of Anglian Water’s Integrated Operational Solutions (IOS)
programme Barhale restored the iconic Chatterton Water Tower in
Spalding, Lincolnshire.
Located in the centre of town, the Water Tower holds up to 3.4 million
litres of fresh water, providing drinking water and essential pressure
to over 22,000 properties in Spalding and the surrounding rural
locations.
Officially opened by The Marquess of Exeter in 1955, the structure is
a local landmark within the town of Spalding and is visible for miles
around. It has therefore been essential that work on this high profile
structure is carried out sensitively and to the highest standards, with a
view to restore the town’s centre piece to its former glory.
Bond Street Water Main Replacement
To meet London’s ever growing transport needs, LUL carried
out a major upgrade of Bond Street Station. More than 155,000
passengers use the station daily. With that number expected to increase to 225,000 when Crossrail arrived in 2018.
The upgrade works were to reduce congestion and delays at the station, open a new station entrance, provide step-free access and integrate access to Crossrail services.
To enable LUL to deliver the full programme of works safely,
several critical water mains needed to be protected from potential
settlement, which could arise from the Crossrail tunnelling operations
and the associated station upgrade.
Abbey Wood Station Civils and Drainage Works
The opening of the new train station building at Abbey Wood was an important milestone for The Crossrail Project as it was a step closer to the introduction of the Elizabeth line services. Abbey Wood is one of ten new Elizabeth line stations, providing passengers with a direct link through central London to new destinations.
As part of the Abbey Wood project, Barhale were required to undertake a series of phased drainage, utility and highway works at the newly constructed Crossrail Station (involving working alongside live rail lines) and within the surrounding streets due to requirements for public footpaths and access to the innovative station building.
A number of drainage runs and manholes were required to be constructed on both sides of the new station to serve the station connecting to the existing surface water and sewer drainage system.
Crossrail Farringdon Station Upgrade
As part of upgrades carried out at Crossrail Farringdon Station, Barhale were engaged by Bam Ferrovial Kier (BFK JV) to carry out trial holes, organise and excavate for the installation of bollards at both ends of Cowcross Street. This is located in the heart of London, in an area frequented by thousands of visitors on a daily basis and in the midst of busy traffic and local businesses. Moreover, the trial holes and excavations took place in areas congested with live services, owned by a diversity of utilities companies (BT, Virgin Media, Vodafone, UKPN, Thames Water, Cadent Gas).
To address these challenges, Barhale took a proactive approach that emphasised exemplary collaboration and stakeholder management. As a result, Barhale provided several design solutions to overcome numerous site restrictions. Barhale also ensured that third party assets were successfully diverted following a strict delivery programme.
Finally, hand-digging and non-obtrusive techniques ensured that the excavations were carried out with zero accidents and cable strikes, despite the heavy presence of live services.
Canterbury WWTW Digester Refurbishment and Upgrade
Canterbury WWTW serves a population of 73,394 and has four digester tanks, each with a capacity of 1500m3 sludge, at approx.12.8m dia. x 11.9m. As part of Southern Water’s AMP6 upgrade works, Barhale were contracted to fully refurbish and upgrade two of these digesters.
The works included purging the digesters out of service; draining down and cleaning the digesters; carrying out necessary surveys and ensuing repairs; replacing the old gas mixing system with a new chopper pump system and all associated pipe-work; installing new temperature probes; testing & commissioning and conducting a 28 days reliability test.
The works took place in an extremely challenging working environment that presented some of the highest risks within the industry.
Canterbury WWTW Aeration Refurbishment and Upgrade
As part of Southern Water’s AMP6 upgrade works, Barhale were
contracted to refurbish the aeration system at Canterbury Waste
Water Treatment Works (WWTW). The works included replacing 7
aeration blowers dating from 1998 with 75kW rotary lobe blowers
which are complementary to new diffusers and the air main. Barhale
also installed new blower and aeration control and instrumentation
systems. These included high and low discharge pressure sensors and
pressure transducer with a visual display or pressure gauge.
The works entailed significant constraints. For example, the blowers
needed to be replaced without stopping the process of the WWTW
and the full works had to stay within consents agreed with the
Environment Agency by Southern Water.