Deformation of track associated with failure
mechanismMott MacDonald was appointed by Birse Rail
to undertake a ground investigation and design remedial works to
mitigate the risk associated with the vegetation and stabilise the
embankment.
Ground investigation and inclinometer monitoring results
indicated a progressive failure mechanism was occurring within the
highly plastic Lias Clay embankment materials leading to track
movement. The mechanisms were modelled in the finite element
software PLAXIS to assess the factor of safety and associated
improvements gained through implementation of remedial works.
Soil nail installation to stabilise
embankmentRemedial works design was undertaken to
Network Rail standards with the production of Form A Approval in
Principle and Form B documentation.
Permanent works comprised an innovative double row of soil nailed
gabions with earthworks fill to stabilise the progressive failure
mechanism and provide additional cess support. Inclinometer
monitoring was undertaken over a 12 month period to confirm
movements had ceased.
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Slope management and vegetation
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