Class 700 Signal Sighting Limitations Project
Our UK Rail Infrastructure Contractor, Global Rail Construction Limited, has been awarded a further signalling civils contract with WS Atkins at Three Bridges Station. This latest project win is hot on the heels following their recent successful delivery for the same company, covering a platform extension and associated Civils and Track (P-Way) works at Redhill Station.
The work comprises the installation of a new cantilever signal superstructure and associated transfer grillage onto 410mm steel piled foundations, the relocation of signal T280 onto a new structure and the demolition of existing structure. The scope of works also covers the installation of RA offset signal structure and installation of a raised GRP platform for maintenance access. These works will provide the required signal sighting distance for normal and turnback operation of 12-car full length units (FLU) on Platform 1
This latest success follows the introduction of the new 8-car and 12-car Class for Train Operator GTR, being enhanced by Network Rail and is to support the requirement for providing the necessary signal sighting at Three Bridges, East Croydon, Brighton and Redhill railway stations.
The location of the new T280 signal is to be moved approximately 20.5m towards London from the centre bridge abutment to behind the London End abutment and wingwall. This will permit turn-back moves of FLU Thameslink Trains towards both London and country. An area of Network Rail land has been identified as the proposed location between the abutment and wingwall of underbridge VTB3/125. The abutment front wall is reinforced concrete faced with masonry and the wing wall is masonry with concrete fill to the rear. The ground signal T1192 located on the existing T280 signal gantry will be repositioned on a new post fixed to the base of the existing signal gantry which will remain in-situ once the gantry is removed.
The lines are powered by 750V D.C. conductor rails, which extend throughout the works area. There is an existing raised GRP walkway running parallel to the siding line which steps down to track level at the London side of the proposed structure. It is proposed to install a raised GRP platform butting up against the existing raised walkway for maintenance access. There are a large amount of surface cables running out of the existing cable trough, these will need to be managed prior to construction works.
Global Rail Construction’s works will include all necessary traffic management, materials logistics and works planning and site management and will be fully controlled by GRCL’s Southern based Contract Management team.
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