Addiscombe Road Bridge
Addiscombe Road Bridge is a single span highway bridge spanning over twin tram tracks. It consists of 19 No. concrete encased, riveted steel or wrought iron girders supporting concrete transverse arch ribs and reinforced concrete (R.C.) slabs. The deck is supported on mass brick abutments via concrete capping slabs.
The skew span varies in length at each end; it is approximately 14.8m at the north end and 17.3m at the south end. The main girders span at a skew of 59°. Concrete arch ribs span between the encased inner girders with tie bars provided between them. R.C. slabs span between girders also.
The structure carries Addiscombe Road (A232 – part of the Transport for London Road Network, i.e. TfL are the Highways Authority for this road), Sandilands and
Ashburton Road (the London Borough of Croydon is the Highways Authority for these roads) over the Tramway between Sandilands and Addiscombe tram stops.
The scope of works was to waterproof the entire bridge deck.
Scope of the works
Contract Start and Completion
July 2019 -December 2019
Water ingress from the topside had damaged parts of the encasement concrete to the girders and had caused corrosion of the steelwork, the scope definition was to remediate this. Some of the work activities are detailed below:
Removal of all vegetation from the road side.
Removal / protection all existing services
Removal of all existing roadway surface, protecting all services
Excavation behind the abutment walls
Excavation within the service trough areas at both ends of the parapets
Carried out repairs to all exposed structure surfaces
Preparation of all surfaces for waterproof
Installation of subsurface drainage
Installation of drainage down pipes
Installation of waterproof membrane and coatings
Protection and sealing all services running through the bridge
Back fill and reinstatement of all services, subbase, and road materials including all signage and road markings.
Installation of VRS system and barriers along both parapet walls / pedestrian walkways
Preparation of the underside of the bridge surface / girders to receive protective coatings to substrate and repainting a multi-coats approved painting system.
Even though the blockade was extended due to the complicities of the utilities and associated excavations, the overall Project was a major success for all involved and provided immediate benefits to Trams and Croydon council as well as to the utility providers which will add future benefits to the community.