Completed Projects
OECP PROJECTS KENSINGTON AND CHELSEA EXCHANGES
Working in partnership with Fujitsu Eirscot is delivering the infrastructure to enable BT Property to transfer it's capabilities from their telephone exchanges in Fulham and Chelsea to the West and South Kensington Exchanges respectively as part of their Operational Estate Consolidation Program project managed by Parsons.
The migration from Fulham to West Kensington Exchange required Eirscot to deliver ten new Manholes carrying a kilometre of 12 & 15 way duct in two phases. Phase 1 running from Fulham Exchange along the North End Road to the A4 Read more, with phase 2 from the A4 to West Kensington Exchange.
The Chelsea to South Kensington Exchange migration involved the construction of five BT manholes and laying approximately 1km of 15 way ducting in the environmentally challenging environment Read more
BT MANHOLE PROJECT ACTON HIGH STREET.
| Contract Duration | 3 months |
| Contract Location | Acton, London |
| Local Authority | London Borough of Ealing |
Contract Brief
To design and build a new multi level manhole at a point of cable damage to copper and fibre cables caused by another utility thrust boring across Acton High St to install a new water main. The damage was located at a depth of approximately 4 meters where the thrust bore cored through the concrete block containing the duct which had been installed by timber lined tunnel techniques many years previous.
Special Engineering Difficulties
This project proved challenging due to the presence of a Thames Water foul sewer of 300.mm diameter running through the excavation and the necessity to pick up another 9 way block of duct at a cover depth of 2.5M. Although this sewer could not be contained within the new structure it would have to be both protected and supported during the works. A non standard design was produced and approved along with a design solution to support the live sewer which was approved by Thames Water. A dilapidation survey was carried out on the sewer with video records taken before and after completion of works.
The total excavation depth exceeded 6 meters and proved problematic due to the running sand ground conditions found at a higher level.
The solution was to construct a two tier manhole with a step in from the lower level to the upper level with this step in now forming the support and position for the 300mm sewer. The upper level would now pick up the BT 9 way duct and the lower level providing a suitable working space for the BT jointers to complete there repairs to the damaged cables
REMEDIAL TIMBER LINED TUNNEL CONSTRUCTED ON BEHALF OF MARCONI CABLE SERVICES / BT PLC.
| Contract Duration | 12 months |
| Contract Location | Ilford, London |
| Local Authority | London Borough of Redbridge |
Contract Brief
To construct a non-standard remedial timber lined tunnel over a distance of 156 meters with 4 associated working shafts at an average working depth of 3.0 meters. One working shaft to be adjusted to suit and a non-standard manhole constructed. A new multiway duct nest laid within the remedial tunnel.read more
DEMOLITION AND RECONSTRUCTION OF EXISTING MULTI-LEVEL MANHOLE ON BEHALF OF MARCONI CABLE SERVICE / BT PLC.
| Contract Duration | 7 months |
| Contract Location | Covent Garden, London |
| Local Authority | Westminster |
Contract Brief
To demolish two very large existing concrete manholes which were in a poor structural condition and re-build with new reinforced concrete manholes to a non-standard design.read more
