Case Study

Case Studies Home > HS2 Saltley Viaduct - Diversion 14 132kV Cable Diversion

HS2 Saltley Viaduct - Diversion 14 132kV Cable Diversion

Excalon have been successful in securing a contract for the diversion of an existing twin 132kV circuit between Nechells and Sparkbroo k/Cheapside substations. The circuits are being diverted due to extensive HS2 development planned in the immediate area of Saltley Viaduct.

The cables are to be diverted from joint bay 1/2 situated outside the Star City Complex to a new terminal tower adjacent to Saltley Viaduct. The new route involves crossing the Birmingham & Warwick Junction Canal via a cable bridge and then excavating for over 1.3km along the canal towpath.

Due to the sensitive location of the works, early engagement and coordination has been essential between Excalon and WPD, Canal and River Trust and HS2 to ensure all proposed methods surpass the high sta ndards required to deliver the project in an efficient and environmentally friendly way.

The space along the canal towpath is extremely limited for plant and machinery and as such the delivery teams will be support by local canal bar ges and pontoons who will be assisting with the movement of all materials along the route.

There are several Special Engineering Difficulties (SED’s) along the towpath route that will need careful planning and execution to ensure the project is a success. These include the construction of a new cable bridge over the Birmingham & Warwick Canal, the design and installation of a new steel pipe support over the River Rea overflow, the re moval of the existing cable coffin under the overpass and the con struction of a new cable coffin and the working proximity to a retaining wall.

As well as being contracted to install the new twin 132kV circuit, Excalon are required to remove the existing redundant gas insulated 132kV circuits situated along the canal towpath.

Overall, the approximate length of the diversion is just over 1.7km with the full scope of works including the duct and cable installation, cable join ting and testing and commissioning of the circuits.

The works are due to commence March 2021 and be complete for November 2021.

Case Study Specifics

Client: Western Power Distribution

Duration: 8 Months

Services Provided:

  • Principle Contractor
  • Full Project Management
  • Civil Design Verification
  • Stakeholder Management
  • Site Management & Supervision Traffic Management
  • Excavation and Civil works 132kV
  • Jointing HV
  • AC Testing

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