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Moulds for retaining walls

Multiple solutions for precast L-, U-, T- and A-shaped retaining walls 

Opening and closing as well as locking and unlocking the moulds, the side-forms and the stop-ends can be done manually, mechanically (gear box) or hydraulically.

There are 3 ways of manufacturing retaining walls:

  • Cast upside-down
  • Side-cast
  • Front-cast

Cast upside-down
Multiple element moulds are typical. All surfaces are fair-faced except from the base which is never apparent. Chamfers can be applied in almost all edges and tongue and groove or other side features can easily be implemented. Between demoulding and putting the elements in the stockyard, a turning operation must be applied. There are several solutions possible to do so (mechanical or vacuum lifting and turning device…) or as a high-end solution the complete mould can be turned and demoulded in one single action. The length of the elements can easily be adapted and simple solutions can be found to change the length of the legs.

Typical one element, one mould combination. It is difficult to combine multiple elements in one mould. It is not easy to apply tongue and groove in these moulds. The mould itself is very straightforward and can be low-cost and easily equipped with chamfers all around. If multiple moulds are required, they are quite space-consuming in regard to the other mould positions. The transport types can be the cast position, so no turning is needed.

A typical mould for this type of casting looks like a table with a fixed vertical side. A second vertical side is used as a counter form. There is always easy access to the mould and to the concrete. The biggest disadvantage of these moulds is that self-compacting concrete cannot be used and that casting with regular concrete must be carried out with great care. One inside face of the retaining wall has no fair-faced finish. If the edges of the retaining walls can be made tapered an easy and quick demoulding of multiple elements is possible.

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