Preform made of concrete for dewatering structures

摘要

In order to dewater structures, in particular in the field of underground construction, for example of cable ducts (19), a moulded brick (10) is used whose lower part (collection part 12) consists of water-tight concrete and whose upper part (filter part 11) consists of water-permeable concrete (light-grained concrete). The moulded brick (10) which is formed in this way is installed in the ground directly next to the structure which is to be kept free of water. <IMAGE>