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Althorp Embankment
Find out more on our role

M25 Flint Hall Farm
Read about our remediation work

A38 Glynn Valley Slope Stabilisation
See our work

 

Remedial earthworks design

Since 1995 Mott MacDonald has been involved in an intensive development programme identifying, innovative and cost-effective ways to upgrade the condition and to extend the usage of ageing and distressed earthworks for London Underground. Techniques used include tied or anchored mini-piled walls, lime columns to stabilise clay embankments as well as horizontal in situ soil mixing to stabilise loose ash on embankment shoulders.

Embankment stabilisationEmbankment stabilisationMore recently these skills have been used to assist Midland Zone of Railtrack to upgrade similar earth structure where repeated maintenance is causing significant delays to normal operation of the railway and as well as requiring repetitive costly short term maintenance.

In addition, we are developing a proactive maintenance strategy for distressed earthworks for the Highways Agency Area 3. This has also included the use of lime to stabilise an embankment in Gault Clay near Gatwick.

Ash stabilisationAsh stabilisationOur award-winning design and supervision of the stabilisation of a large cutting on the M25 (using dowel piles), is an example of the strategic solutions we are able to deliver.


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