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Heol Pentrefelin, Wales

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Heol Pentrefelin, Wales

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Diamond 25 retaining walls provided to construction of housing.
1 of 4 | Diamond 25 retaining walls provided to construction of housing.
Easy, cost effective, efficient construction of walling.
2 of 4 | Easy, cost effective, efficient construction of walling.
Aesthetically fitting to the brief
3 of 4 | Aesthetically fitting to the brief
Formed boundaries to many of the houses.
4 of 4 | Formed boundaries to many of the houses.

Diamond 25 was used as a retaining wall solution as its aesthetically pleasing and easy to use product.

Key facts

Sector: Housing
Client: Celtic Home & Builders Ltd, Dyfed
Contractor: Celtic Home & Builders Ltd, Dyfed
Engineer: George Brown Consultancy, Cardiff
  • Aesthetically pleasing
  • 'Split - face' finish
  • Rapid, straightforward and cost effective product laying

Brief

The client wished to develop a sloping site in west Wales to accommodate new and exclusive housing. Numerous configurations of houses were considered before it was decided to create a series of terraces onto which the new houses would be built. Three parallel retaining walls, up to a maximum of 3.5m high, were required to run the length of the site. Gentle curves in the walls would also provide a feature and interest to the future homeowners. In order to embrace sustainability of scarce resources and to reduce import and export of site materials, an optimum solution would be able to reuse site won material.

Solution

Anchor Wall Systems were approached by George Brown Consultancy to offer alternative retaining structure solutions to meet the clients brief and budget. The wall had to be aesthetically pleasing as it would form boundaries to many of the houses. Ultimately, Diamond 25 was selected as the most appropriate retaining wall solution.

This segmental concrete retaining wall system features a ‘split-face’ finish and was installed as a reinforced wall in combination with polymeric geogrid soil reinforcement. The reinforced soil block acts to retain the terraces and roads above it.

Examination and testing of reclaimed materials from the site showed that it would be suitable for use as a structural backfill to the geogrid reinforcement. This removed the need for the client to either export material off-site, or import expensive structural backfill material, reducing costs.

Consistent positioning and a very accurate wall face angle of the Diamond 25 wall is achieved by a rear lip locator cast on the block. This makes construction of the wall rapid, straightforward and cost effective.

Drainage provision is important in segmental retaining walls, and this was achieved by the addition of a granular drain immediately to the rear of the wall face. From here water was vented into the site surface water drainage system. Where the Diamond 25 walls supported roads on the development, vehicle impact barriers were positioned to the rear of the segmental retaining walls. Sockets were built into the reinforced soil zone as construction progressed.

Heol Pentrefelin, Wales

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