Concrete tank especially for domestic waste water treatment is cast in one piece with inner partitions to make compartments of different sizes

摘要

The tank, comprising an outer wall (16), a base (17) and one or more partitions (18, 19) dividing it into compartments (20, 21, 22) of unequal size, is cast in one piece with the outer wall made cylindrical in shape and the partitions located to one side of its central axis (A). The concrete is poured between an outer mould (1) and hollow inner cores (2, 3, 4) connected by a cylindrical ring and fitted with valves (23, 24, 25) in the form of plugs (26, 27, 28) and rods (29, 30, 31) passing through guide sleeves (34) in cross members (36. 37, 38).