Culvert Lining | Greatham Beck, Hartlepool, UK

250m² of CC8^® installed to provide a protective lining to a culvert

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Project Overview

In September 2018, Concrete Canvas^® Ltd were approached to establish whether their GCCMs could be used to extend the working life of a new culvert structure. The design of the culvert was to the standard BD12/01 and under clause 8.14 the provision of additional protection to the newly installed corrugated steel structure was required.

The culvert was situated beneath an existing masonry railway arch and placed in a tidal stream known as Greatham Beck. A solution was required to provide the additional protection required under clause 8.14 from the tidal water. The client also required the solution to give the culvert structure the required 120-year life span.

Inverts lined with concrete to support CC, Pre-cut layers transported to site using scaffold pole, Typical end detail, Marking CC for fixings

250m²

of CC8^® used to line the culvert

7 Days

to complete due limited access during high tides

2 .5

years later, CC8^® was still performing as expected

Solution

The location and site restrictions prohibited standard invert protection techniques, therefore, a practical, cost-effective solution was required. The material would be used to line the invert of the culvert structure, extending above the normal high tide level for maximum protection. The culvert manufacturer approached CC with their proposed solution, and together finalised a design which was approved by all parties.

Concrete Canvas CC8^® GCCM (CC) was specified to line the culvert structure as planned and provided the 120 year lifespan required by Network rail.

CC edges secured under clamping bars

Design & Installation

Prior install, invert culvert corrugations were filled with concrete mix to provide smooth, void-free surface
CC8^® Bulk Rolls were specified
Bulk Rolls batched on site for transporting into the culvert by hand
Transverse layup
Perimeter edges secured with clamping bar
Stainless steel fixing and washer joints
Additional fixings mid panel to prevent CC from bulging as concrete mix was poured behind to fill the corrugations on the sides
CC was hydrated using a dammed water and hose

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Completed wall section of CC lined culvert

Summary

The installation of the 250m² of CC8^® material was carried out across several days due to the lack of access to the site during high tides. The installation was a success, with the collaborative approach to the project, and the specified CC8^™ material resulting in all of the client’s requirements being met.

The site was re-visited in June 2021, over two-and-a-half years after the installation was completed. The CC was found to be performing as expected despite very high tides. The CC is also beginning to ‘green’ due to algae growth on its fibrous top-surface.

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