Crag End landslip, Newcastle

1 March, 2016 | 17:45 - 20:00

The damage to the road after the landslip at Crag End, Northumberland.
The damage to the road after the landslip at Crag End, Northumberland.

About this event

This talk will discuss the Crag End Landslip – A section of the B6344 road connecting Rothbury to the A697 has been closed to vehicles since 26th December 2012 due to a landslip following one of the wettest periods on record.

Northumberland County Council, is keen to re-open the road as soon as possible as residents are currently faced with a substantial detour to access Rothbury. The local economy depends heavily on tourism which has been badly hit by the road closure.

VBA has designed and implemented a solution comprising two main elements – a deep dewatering system to reduce the risk of instability by lowering artesian groundwater pressures, and an anchored bored pile retaining wall to support the road in the event of a slip.

This talk will be split into three parts:

  • Part 1 will give an overview of the project, discuss the geology and hydrogeology, challenges faced during intrusive ground investigations, causes of instability and the landslip mechanism.
  • Part 2 will cover the technically complex bored pile anchored retaining wall design, provide an overview of the chosen passive dewatering system, and discuss the design challenges faced.
  • Part 3 will present an overview of construction work and discuss the challenges faced working at a remote site with limited working space.

Speaker

Paul Berry, Senior geotechnical engineer, Newcastle-Upon-Tyne.

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