In October 2017, Concrete Canvas® GCCM* (CC) was used to line a drainage channel on the A21, along the Tonbridge to Pembury Dualling stretch.
The aim of the project was to find a lining solution for the channel, which would collect runoff water from the highway and transport it to a storage pond. The channel was 360m long, with a 0.5m wide invert, and 1.5m long side slopes.
A channel lining system made from sections of corrugated HDPE had originally been specified for the project; however, the requirements for the installation meant this solution was not suitable due to the tolerances required in channel preparation needing a lot of additional work. Instead, CC was specified, providing greater flexibility during installation, as well as accomodating varying profile widths in the channel more successfully.
The works were carried out by Balfour Beatty for Highways England. To read the full case study, click here.