Steel Sheet Pile

U Type Steel Sheet Pile

U-shaped sheet piles (commonly known as Larssen sheet piles) are standardized long structural steel materials with a U-shaped cross-section and vertical interlocking. They are mainly used for foundation pit support, retaining walls, water barriers, and cofferdams. They form a continuous rigid wall through interlocking, and have advantages such as high strength, good water tightness, rapid construction, and reusability. They are widely used in temporary or permanent projects such as ports, bridges, and basements.

Features
Symmetrical U-shaped cross section
Strong bending resistance
Reliable interlocking performance
Easy installation and extraction

Applications
Foundation pit support
Harbor and quay walls
Riverbank protection
Temporary cofferdams

Z Type Steel Sheet Pile

Z type sheet piles are produced in the shape of Z letter,which are normally drive in crimped or welded doubles. Z type sheet piles are more widely used than U profile in port construction and deep foundation because Z profile can have a bigger modulus and can be used as intermediary piles for tubular and HZ combined walls.

The main characteristics of Z-shaped hot-rolled sheet piles are: continuous webs and symmetrically interlocked positions on both sides of the neutral axis, both of which contribute to increasing the section modulus. Generally, Z-shaped sheet piles have the following advantages:
1.With similar section moduli, the weight per unit area of Z-shaped sheet piles is usually less than that of U-shaped sheet piles;
2. Larger width means fewer sheets are required, thus saving on sheet pile installation or excavation costs, and also improving waterproofing performance;
3.They can be used in conjunction with steel pipes and H-beams as infill piles, typically used to achieve extremely high section moduli.

Applications
Circular cofferdams
Bulkhead walls
Marine engineering structures

Straight Web Sheet Pile

Straight-web sheet piles are commonly used to construct closed cylindrical structures and are widely applied in temporary or permanent structures such as cofferdams, wharves, and port engineering. Their interlocking connections allow for rotation of approximately 4.5°, and with special bending, this can reach 12° to meet the requirements of different structural shapes. Straight-web sheet pile structures can be designed as circular units or partition walls, relying on a large unit diameter and internal backfill to ensure stability. They primarily bear horizontal tensile forces, thus requiring the interlocking action between the sheet piles.