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Event Organiser: ICE

Geotechnical challenges on A83 Strone Point improvements, Glasgow

  • Lecture
  • Glasgow
  • 06 February 2020
  • 17:30 - 19:30
Geotechnical challenges on A83 Strone Point improvements, Glasgow

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The A83 is of significant economic and strategic importance, connecting the Central Belt to Argyll and Bute and surrounding island communities. The section of A83 at Strone Point was an accident blackspot. The site is overlooked by the town of Inveraray across Loch Fyne and presented various environmental and geotechnical challenges.

Jacobs’ project brief was to create a single radius curved alignment with enhanced highway standards over a length of 370m to improve road safety. This required cutting into a steep mixed soil and rock hillside whilst keeping the A83 open to traffic. The solution was also to be environmentally and aesthetically sympathetic to the landscape.

The initial design was fully Code compliant as required by Transport Scotland, but the cost estimate exceed the available budget. Hence an alternative earthworks solution was required to enable the scheme to be financially viable, whilst still achieving the requisite highway performance.

This was achieved via various value engineering and innovative measures, developed in a collaborative approach with a specialist contractor resulting in a 50% saving in the earthworks costs. The scheme was constructed in four months by John Paul Construction and opened in April 2018. Further value was achieved on site by reducing the number of night time closures and details of soil nail installation.

Registration and refreshments from 17.30 for a 18.15 start.


For more information, please contact:

Donald Bell
E: [email protected]


Fraser McMillan and Rob McConnell are both Jacobs UK Geotechnical Engineers with over 20 and 25 years’ experience respectively. Fraser developed the design strategy and is currently leading the specimen design for Lot 2 of the A9 Dualling Scheme. Rob was the technical supervisor during construction and is generally responsible for rock engineering schemes and ground investigations.

Event venue

University of Strathclyde
Technology and Innovation Centre
99 George Street
Glasgow G1 1RD
United Kingdom

For more information please contact:

Lynn Dow

e: [email protected]