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The gateway to boating leisure
14/08/2008
With berths for nearly 600 craft, the Mercia Marina near Derby will be one of the most prestigious pleasure craft developments in the country.
Engineers Bettridge Turner & Partners chose a Matière CM4 precast concrete arch structure for the entrance to the development. The 27.5m long ‘green’ bridge/tunnel will take vessels on a new canal link from the Trent and Mersey canal under the re-aligned access road to the site.
The CM4 25m2 x 40m2 structure with a span of 4.78m was carefully selected to give the required clearance over the canal and tow path whilst keeping the finished road level as low as possible.
The Matière CM4 arch profile closely replicates the traditional brick arch bridge shape frequently found on the UK’s canal network so compliments the traditional canal architecture. By using a raked spandrel wall and recess roof unit at each end of the tunnel, the portal will follow the earth works line without the need for intrusive headwalls.
The structure was erected in just 2 days, well in time for the Marina’s planned opening in September 2008.
Image: The completed Matière CM4 structure and in-situ canal base before waterproofing and back-fill operations started.
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