106412 – HV Cable Route Refurbishment project

About Project

106412– HV Cable Route Refurbishment project throughout Wessex ECR area

Project Overview

The 106412– HV Cable Route Refurbishment project was carried out to repair and replace the cable routes for HV feeder cables on the Wessex route electrification which was in a degraded state.

Where the HV cable was unsupported or was retaining the weight of ballast material it experienced undue mechanical stress, leading to rapid degeneration of the insulation and damaging the integrity of the HV cable which could have caused the cable to fail.

This cable route also had encountered a degradation of the GRC and GRP troughing housing the cable as over time it had become brittle and broken leaving the feeder cable exposed to the elements.

Sunville Rail conducted the surveys to identify where subsidence or displacement of the existing cable route existed and then carried out the required work to ensure that all HV cables affected by soil or ballast movement are offered the best route and maximum possible protection from mechanical stress.

The general scope of the works included:

• Site surveillance and planning
• Bank stabilisation
• Retainer walls
• Troughing repairs and installation
• Route support
• GRP installation
• Vegetation clearance
• T Stake support to existing routes
• Ballast clearance
• Manhole installation