We were approached by Alun Griffiths (Contractors) Limited, and Atkins to advise on a suitable geotextile to go beneath rock armour as a heavy-duty separation and filtration layer. The geotextile would form part of the necessary repair work to Network Rail Wales’ embankment at Old Colwyn, Conwy.
During the design phase, Atkins considered and appraised options using either 3,000kg or 6,000kg rock armour with an appropriate grade of MultiTrack SNW geotextile beneath. The final design solution was then agreed upon between Atkins, Alun Griffths (Contractors) Ltd and Geoworks, utilising 6,000kg rock armour overlying MultiTrack SNW140 geotextile.
Our needle punched nonwoven geotextile, MultiTrack SNW, was chosen as it has been specifically developed to offer outstanding performance at minimum weight. The MultiTrack SNW range is manufactured from 100% virgin polypropylene staple fibres and offers unrivalled CBR puncture resistance and tensile strength coupled with optimised elongation and permeability.
