Abstract: The invention relates to a drain trench body having base plates (11, 12), between which columns (13) are arranged vertically. The drain trench body comprises side walls (14) which are connected to the base plates (11, 12). The side walls (14) and the base plates (11, 12) have first and second locking elements (15, 16) which are in engagement with each other. The locking elements (15, 16) are movable relative to one another in the height direction along the longitudinal axis of the columns (13). The invention further relates to a center plate (20) for a drain trench body.

Abstract: The invention relates to a trenching unit having at least two trenching bodies (10a, 10b), which each comprise an upper base plate (11), a lower base plate (12), and hollow columns (13a, 13b), which are arranged perpendicularly between the base plates (11, 12) and form column openings (14) in the base plates (11, 12), wherein the lower base plate (11) of the one trenching body (10a) and the upper base plate (12) of the other trenching body (10b) bear on one another in such a way that the column openings (14) of the two bearing base plates (11, 12) are arranged concentrically.

Abstract: The invention relates to a device for guiding liquid, in particular a drainage channel, comprising a guiding section (10) and at least one functional region (11), wherein the guiding section (10) is formed of concrete, which has a binder and a filler having a first grain size K1, wherein the functional region (11) is formed at least partially of a filled reaction resin, which has a filler having a second grain size K2, wherein K2<K1.