RJ Power Group were faced with challenging on-site design issues and sought to mobilise a small team to work collaboratively alongside Volker Fitzpatrick’s design team, accessing accessible areas to provide important data to facilitate the progress of the design.
The cable containment over the main access footbridge, providing the links to both the down siding and the up sidings, necessitated the need for innovative design arrangements from RJ Power Group. The bridge which carried the 11kv ring main feeder cable for the depot as well as the 10No positive ETE cables and 6No ETE return traction cables, also required a fire segregation system to be designed and installed to prevent the circuits from damaging each other.
The length of cable runs and the accessibility of the cable routes required careful scrutiny by RJ Power Group’s project team. A novel method of installing the ETE cables with bespoke horizontal cable spinners was devised by RJ Power Group. This allowed the longer cable runs to be installed by fewer staff both from the cable drums and into the awaiting cable containment, providing a safe and efficient working methodology.
An inventive approach using 110v capstan cable winches was taken by RJ Power Group in respect of a large number of cables that needed to be installed through buried cable ducting.
Additionally, careful consideration was given to smaller emergency push button cabling, which was installed by hand into duct or onto cable trays.
Recognising the complexities faced by the client in design and sourcing the appropriate cabling and EPB button in respect of the systems for both sidings, RJ Power Group worked closely with their project team and provided design and product advice to ensure that the correct equipment and materials were procured, thus ensuring that key programme installation, test and commissioning milestones could be met with confidence.
The programme was originally due to be commissioned in three separate stages, however, due to the complexities around the design and also separate pressures from other on-site activities, the works were re-programmed to be completed over six separate stages. RJ Power Group’s flexible approach allowed these changes to be effortlessly delivered, with a high degree collaborative interface throughout.
Additional works were also carried out successfully by RJ Power Group in respect of the commissioning of the Under Frame Cleaning building (UFC) interlocking system. This complex system, which took feeds from multiple locations to ensure that the interaction between all the various systems installed functioned correctly, was successfully completed as part of this project.
R J Power Group absorbed and managed effectively the project risks, fully owning the power deliverables, delivering the project with minimal support and providing a seamless and integrated service into Volker Fitzpatrick.
By holding a directly employed workforce of highly trained power engineers, RJ Power Group, were able to flex their resource to meet project change without affecting the key project dates.
Flexibility around contract engagement, ensured RJ Power Group were able to complete the works using a fixed-price lump-sum model, which allowed their strong engineering delivery group, to proactively adapt to and manage the project complexities, meeting the programme – even with the volume of change – successfully commissioning the project, with zero defects to meet its grand unveiling.