To simplify the production and expand the variability of structures to use, a grooved sheet pile having a trough-type body is produced by cutting a cylindrical segment (referred to as a troughlike element) (1) from a round tube along its length and fixing locking elements (2) and (3) to side edges of the troughlike element. The troughlike element (1) can be reinforced by attaching reinforcing elements (4) thereto and/or providing annular elements (15), (16). The troughlike element (1) has a section made of material of higher strength and/or corrosion-resistant and/or thickened material. The troughlike elements (1) can be arranged in parallel and fixed to each other to make a panel.