Maidstone, UK – NC Line Culvert Strengthening
Kent County Council‘s programme of planned highways maintenance works to be carried out during 2019 – 2021 included strengthening works to structures such as the Raigersfeld Culvert situated beneath the A20 Ashford Road, Maidstone, Kent.
Following on from previous culvert rehabilitation works for Kent County Council, Steadline Ltd. were once again comissioned to make the required improvements to an existing historical brick and steel beamed culvert which was showing signs of deteriotaion resulting the restriction of flow capacity.
With the same project team comprising Steadline Ltd., BdR (Civil & Structural Engineering) Ltd. and Amiblu, a bespoke, non-circular GRP liner was designed with specific challenges to overcome, including:
- Steel cross sections to the soffit of the culvert
- Inconsistent shape
- Traffic loads
- Restricted access
- Environmental considerations
The result, 16 m x 1 m length sections, 1244 mm x 754 mm Eliptical shaped NC Line with a 27 mm wall weighing just 175 kg per meter with a push fit bell & spigot socket, was designed to maintain the required cross section and flow capacity.
“All in all the scheme was very successful and certainly improved the flow of the stream/small river and with the new rag stone head walls looked very pleasing to the eye.”
– Aaron Harber, Contracts Manager, Steadline Ltd.
Amiblu relining pipes are particularly suitable for pipe and culvert rehabilitation, as they are light in weight, corrosion resistant, quality assured, easy to install and engineered to give 150 years’ service life, they are manufactured in a wide range of sizes in both circular and non-circular options and with varying strengths to cater for all locations and performance criteria.
Amiblu NC Line pipes are produced to ISO16611. The non-circular cross-sections are ideal for relining and strengthening aging sewer networks, culverts and channels. Non-circular pipes are also used for open trench applications where capacity is required, but allowable depth to invert is limited. They can be customised according to project requirements and easily be adapted to different types of shapes and geometries.
Fmd: united.kingdom@amiblu.com