CAN was contracted to carry out the installation of heavy-duty brackets, secured with Cintec anchors installed in cored holes, to support 15m high overhead line masts to Piers 1 and 4 of Winterbourne viaduct.

CAN carried out advance trial coring at each works location to determine substrate conditions and inform the design and main works methodology. With the design approved, and knowledge that the anchors would need to pass through loose fill material as well as the engineering brick of the structure, CAN mobilised to site to carry out the main works.

A V-Deck modular access platform was used to provide a suitable working platform. Coring was carried out using a double mining barrel system in conjunction with plastic casing, allowing cores to be removed as drilling progressed, with the outer barrel forming a casing to keep the cored hole open and then being replaced with a further plastic casing. The very tight tolerances between the clearance holes to the brackets and the anchors were met with anchor sets drilled to within 1.5mm accuracy.

The OLE brackets, weighing 215kg each, were winched into position using winches attached to a CAN designed and manufactured gallows bracket installed above each works location. All CAN works, including repointing sections of brickwork, were completed on programme.

Duration:        5 Weeks

Client:             Balfour Beatty Rail

Location:        Winterbourne, Bristol