Case Studies

The following key case studies exemplify the versatility and outstanding success of the novel and highly successful King Sheet Piling (KSP®) retaining wall system.


M25 DBFO Widening Junctions 16 - 23 and 27 – 30, UK

King Sheet Piling (KSP) was first used in 2009 on this prestigious, high-profile and fast-track project to widen 63 km of motorway in the northern sector of the M25 London Orbital Motorway. Introduced without prior trial, it proved a resounding success, with over 25km of KSP wall forming part of Europe’s largest land-based use of sheet piling. Steel saving of 35% to 40% was typical. The KSP installation speed was key to the project opening 3 months early and helped deliver KSP savings of over £10M, shared equally with the Highways Agency.

More information about the Balfour Beatty project


A421 Marston Pumping Station, UK

Incorporation of KSP in 2009/2010 in the re-design of a pumping station saved £800k and avoided a projected 3 month programme over-run, resulting in savings of £2.7m for Client, The Highways Agency.


M4/M5 Managed Motorway, UK

KSP’s versatility was proven in 2011/2012 by use in weak rock where sheet piles would normally be rejected. It saved valuable vegetation screening, enhanced safety and was built in 1/3 the time of a gabion alternative.


Westbury Railway Embankment Stabilisation, UK

KSP was used to great success in stabilising a railway embankment for Network Rail, saving 41% of steel and more than halving noise for nearby residents.


Contact Us

To find out how you can use a KSP wall on your project, see Guidance to Users. Contact enquiries@ksp-piling.co.uk for more information.

Latest News

July 2021: Installation of the last KSP wall on M4 Junctions 3 – 12 Smart Motorway marked completion of many kilometres of Smart Motorway KSP walls across the Highways England network. KSP walls are currently being designed for further schemes under the Smart Motorway Alliance programme.

2020 saw completion of substantial anchored and cantilever KSP walls for Langport Embankment for Network Rail, following on from those on Bridgewater rail embankment in 2019. KSP walls completed or in progress for Highways England include M23 J8-10, M1 J13-16, M4 J3-12, M25 EAs 01 & 06 and A19 Norton to Wynyard. Further KSP walls are envisaged on Highways England SMA schemes currently in the design phase.

10 November 2020: The United States IPO issued Patent 10,829,902 covering the intellectual property rights behind KSP.

12 April 2019: The Indian IPO issued Patent 311168 covering the intellectual property rights behind KSP.