Larssen sheet piling

Larssen sheet piling is a kind of sheet piling retaining wall. Segments with indented profiles (troughs) interlock to form a wall with alternating indents and outdents. The troughs increase resistance to bending. The segments are typically made of steel or another metal.

Larssen sheet piling was developed in 1912 for use in the construction of piers, oil terminals, waste storage facilities, bridges, houses, buildings, other construction sites and for the strengthening of pond banks, preventing slumping into a pit and flooding.

Lengths can reach 34 meters.

Each segment is flipped 180° versus the preceding segment. The segments lock together using a variety of interconnections.

The fully assembled structure is formed in a linear, circular, or other shape.

To reduce the filtering space, mixed sealant is injected. Additionally, it may be combined with the use of dowels, metal beams and pipes.

Metal dowels are hot-rolled and cold-rolled.

cantilever beam fixed at the bottom of the wall.

Larssens are used in foundation pits, coastline strengthening, bridge construction, piers and other work requiring extremely strong support in a narrow geometry.

...
Wikipedia