safety · quality · programme


Werrington Grade Seperation


£8 Million
70 weeks

Scope of works:
The Werrington Project was split into multiple packages. OC constructed the South Ramp, Reception Pit and Box Culvert. This involved trackside drainage, FRC to capping beams, pile cropping, earthworks, and cofferdam excavations.

South Ramp Construction:
OCS constructed over 1km of capping beams and base slab (5500m3 concrete) to the south ramp of the project into the dive under. OCS are also undertaking over 4km of drainage on site. This phase of the project was completed in January 2021, prior to the 9-day blockade to jack the dive under box in February 2021. These works are being carried out between two live railway lines.


Reception Pit
Upon completion of the piling works, OCS carried out the FRC to the capping beam. Following on from this OCS carried out the excavation of 2200m3 of material and installed the temporary propping. OCS then constructed the base slab. Upon completion of OCS works, the TBM shortly broke through into the reception pit. These tunnels will be fitted out with guide rails which will guide the jacking of the 13000-tonne curved box from the east to the west of the project, to form the Werrington Dive Under on the East Coast Mainline.

Box Culvert
Oliver Connell was contracted by Morgan Sindall to carry out the earthworks and FRC to a 350m long concrete culvert (4500m3) to take the watercourse of Brook Drain South Prior to the slewing of the ECML tracks on to the top of the constructed Culvert. These works were carried out next to the live East Coast Mainline railway which was also next to overhead power line and pylons. OC carried out the works with specialist plant and formwork to aid the construction process in this confined area. Following some unexpected flood events, all works were completed on time for the slewing of the tracks on a Christmas possession.

Trackside Drainage and Shaft Works
OCS are also undertaking over 4km of drainage on site. This included some Shaft works and a river diversion to a local watercourse. We utilised our in-house Vacuum Excavator to handle the safe excavation around the contig wall and shaft.

Oliver Connell & Son Ltd
Zanrose House, Perivale Park,
Horsenden Lane South, Greenford, UB6 7RH

T. +44 (0) 20 8568 0001

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