Retaining wall movement, identified in a recent building inspection carried out in the Arana Hills area, a Northern suburb of Brisbane, by Peter Weddell, owner/operator of Qld Home Buyers Inspection Service.
These retaining walls have moved and would need a large amount of money to remove and replace. Due to limited access with machinery. Therefore replacing them would be labour intensive and costly.
Loose block walls are suitable for retaining small volumes of soil only, less than 1 metre in height. They are not suitable for retaining large volumes of soil.
Another example of retaining wall movement with loose concrete tubes used in construction.
To avoid retaining wall movement. Walls over 1 metre in height must be engineer designed and reinforced. Concrete filled and have drains fitted to the lower section (to help relieve water pressure build up). Council approval and soil tests are also required.
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