Three concrete retaining block walls have been built at the Silverstar Casino entertainment complex in Krugersdorp using CMA member, Terraforce’s L11 blocks. The landscaping blocks were supplied by Terraforce licensee and CMA member, ReMaCon Products cc, and the walls were designed by ReMaCon CEO, Silvio Ferarris.
The walls were constructed after an amphitheatre, The Dome, designed and built by Otto Wijnberger of In2Structures, had been added to the site.
Backing onto Roodekrans Ridge, the largest wall is 128m from end-to-end and tops 6.5m at its highest point. Running adjacent to the amphitheatre, it was built by Powergate Construction at an angle of 70˚. Backfill, which varies in depth between 3-3.5m, was reinforced with Kaytech PC 50/50 geofabric at every third block layer.
Wick drains were installed on the cut face at 45˚ every two metres and these channel rain water into a sub-soil drain. Further drainage is provided by a rain channel which was installed in the backfill behind the top layer of blocks.
Indigenous trees, grasses and shrubs combine with the foreground paving to complement and soften the retaining wall particularly well, while the red soils used for the backfill have stained the grey blocks, resulting in a colour mix that blends in well with the surrounding environment.
The two other walls, one 95m long and three metres high and the other 91m long and two metres high, were built to secure embankments on the fringes of two parking areas. Both were built by Powergate Construction using the same L11 block and to the same design specifications as the larger wall.
The Terraforce L11 block has a round face finish (as well as a rock face option) which is easily planted. Moreover, the L 11 system is also cost-effective and easily constructed in uniform concave curves.
For more information contact Silvio Ferarris:
Tel: 011 393 55 04
Email: [email protected]omsa.net