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A377 stabilisation scheme underway

A377 Devon

Stabilisation work on the A377 in Devon has got underway.

Reconstruction work has started on a 30m stretch of the A377, where the edge of the road was cracking due to an unstable embankment.

Three metres has been excavated adjacent to the carriageway before a new concrete retaining wall was built, after the existing bank was showing signs of movement.

The height of carriageway is around 3m above the adjacent field level.

A Devon County Council spokesperson said: “Originally we were considering a reinforced earth embankment solution, however this is a busy main road and our preference was a simple mass concrete dwarf wall at the toe of the bank which we hoped would allow a quicker and more robust repair to be constructed.

“The dwarf wall stands approximately 1m above field level, and in turn sits on a mass concrete bass 0.9m thick founded onto underlying gravelly very sandy clayey silt material. This allowed Class 6N backfill material to be compacted behind and finished at a 1:2 batter slope.”

 

A377 Devon

A377 Devon

Finishing works will also include reinstatement of the road surfacing and the replacement of highway drainage.

Macplant Construction is carrying out the work and the road is due to be reopened on Monday 12 February.

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