London Underground, Victoria Station Upgrade

Client: Transport for London
Main Contractor: Taylor Woodrow/BAM-JV
Year: 2012
Value: £40,000



This phase of the Victoria Station upgrade involved the electrical installation between the North Ticket Hall and South Ticket Hall, whilst keeping the station operational. Mott McDonald had designed the power and communication cable network to follow a route to the external of the station building, under adjacent roads and into each ticket hall. This formed the most practical way of connecting both ticket halls effectively, but required an effective watertight sealing system that ensured the vital network cables were protected.



Mott McDonald approved the installation of Interflow UK Ltd’s DOYMA Service Duct Sealing system on the project. As the service ducts needed to be installed through the walls of both the North and South Ticket hall, it was vital that there was no risk of water penetration at the joints of wall, duct and cable, particularly in light of a high water table within the vicinity. The fact that Interflow UK Ltd installed and supplied a product in one package was vital to the solution. The DOYMA system of high density EPDM, within a steel gasket, ensured that the cable network was protected from both water and gas infiltration. This was supported in the design, manufacture and installation by Interflow of two bespoke penetration plates as required by the specification. As an additional fail safe, new tanking was installed over the top of the connection.

Why Interflow Were Used:

Key to the success of this package was that Interflow UK Ltd installed the DOYMA System on site, using their skilled installation team, whilst being the appointed UK supplier of the DOYMA system. Additionally, a 25 year insurance backed product guarantee was supplied. Moreover, the DOYMA system was quicker to install than considered alternatives, enabling the programme to stay ahead of schedule and minimising disruption to road users in the area.

“We chose The DOYMA System through Interflow because it was a tried and tested system, but also it was a plug and play solution. All the installation was very speedy by Interflow and resolved all our concerns regarding water tightness and programme.”
Palan Senthor-Mott McDonald.