FIELD: hydraulic engineering. SUBSTANCE: groved-and-tongued wall has piles 1 with lengthwise groved-and-tongued locks 2 installed on them. Connecting members 3 are installed between the piles. Connecting piles 3 and tubular. Lengthwise ledges 4 engaging groved-and-tongued locks 2 of piles 1 are secured to outer surfaces of connecting members. Groved-and-tongued locks 2 are made of two angular sections with lengthwise stiffening rib 5 installed between those. Side edges of stiffening rib 5 are welded to walls of lock 2. Stiffening rib 2 may be made of separate flat members installed through intervals in one vertical plane. EFFECT: higher reliability. 2 cl, 3 dwg
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