NEW CABLE ROUTE AT WEST WEYBRIDGE

Client: UK Network Power
CHALLENGE
- To design a new 2km, 132kV cable route from a substation to a switching station at West Weybridge, Surrey, passing under the M25, another major road, a canal and a railway
- To respect and balance the interests of multiple landowners and other stakeholders
SOLUTION
- To design three horizontal directional drills up to 22m deep and 300m long so that settlement under the roads, canal and railway was minimised within acceptable limits
- To reassure the client and stakeholders by including in the designs geotechnical analysis of the existing strata, predicted settlement calculations during and after drilling and devising a suitable monitoring regime
- To demonstrate capability and competence through multiple iterations within the design phase
RESULTS AND BENEFITS
- Designs approved by Network Rail, the Highways Agency and Surrey County Council
- A comprehensive detailed ‘buildable’ design approved by the client and backed by relevant reports and calculations
- Stakeholders could continue to use their land as normal as settlement was minimised