Case Studies: Temporary Slope Stabilisation, Wastewater Treatment Works Manchester, England

PROJECT SPECIFICATION

As part of a Wastewater Treatment Works upgrade, a 25m x 50m storm water retention tank was to be constructed. A formation level of 14m below existing ground level required a novel approach for stabilisation of the temporary batters. Typical solutions such as a secant pile wall or sheet pile wall were not appropriate due to the lack of flexibility to avoid existing infrastructure.

Slope reinforcement during excavation using Platipus anchors (Left) & Design showing anchor installation to stabilise slope (Right)

SOLUTION

The Designer, OGI Groundwater Specialists, proposed their Stable-Earth™ system which comprises of slope rein-forcement and erosion control using Platipus Percussion Driven Earth Anchors (PDEA®) together with groundwater management. The design approach was flexible and enabled OGI’s Engineer to adjust the placement and frequency of the Platipus anchors as necessary. The use of the PDEA® System and the OGI Stable-Earth™ system for this large-scale infrastructure project has demonstrated the viability of using cost effective materials to stabilise steep batters for temporary excavation works.

Completed temporary works with the retention tank in position

Further Information

For more information visit www.platipus-anchors.com or write to info@platipus-anchors.com

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