Larsen piles, also known as U-shaped steel sheet piles, are a new type of retaining wall. They are used in pile bridge cofferdams, large pipeline construction, temporary ditch excavations, water and sand retaining walls, and as retaining walls at docks and unloading yards. They play an important role in engineering projects, such as as retaining walls, embankment revetments, and bank protection.

Larsen piles are shaped like a rope, are environmentally friendly, and offer fast and cost-effective construction. They also provide excellent waterproofing. Larsen steel sheet piles are also known as U-shaped steel sheet piles.

Larsen steel sheet piles are categorized by surface shape and application, including U-, Z-, and W-shaped steel pipe piles. They are also categorized by wall thickness into lightweight and cold-pressed steel pipe piles.

Lightweight steel sheet piles have a wall thickness of 4-7mm, while standard steel sheet piles have a wall thickness of 8-12mm. U-shaped interlocking Larsen steel sheet piles are primarily used throughout Asia, including in China.