Steel sheet piles are structural steel products widely used in construction projects for applications such as retaining walls, cofferdams, waterfront structures, and flood defenses. They are designed to interlock, forming continuous barriers to support earth or water loads. Below is a detailed overview of the primary types of steel sheet piles based on shape, application, and manufacturing processes.
1. Types of Steel Sheet Pile by Shape
(1) Z-Type Sheet Pile
Description: Z-type sheet piles have a Z-shaped profile, with the interlocks positioned at the outer edges.
Features:
High section modulus for better bending resistance.
Efficient use of material due to symmetrical design.
Suitable for deep excavations and large retaining structures.
Applications: Used in retaining walls, seawalls, and large waterfront constructions.
(2) U-Type Sheet Pile
Description: U-type sheet piles have a U-shaped profile with interlocks at the neutral axis.
Features:
Offers good strength and flexibility.
Easy to install and retrieve.
Lower section modulus compared to Z-type but provides effective sealing.
Applications: Ideal for smaller retaining walls, riverbank protection, and temporary works.
(3) Flat-Type Sheet Pile
Description: Flat-type sheet piles have a flat profile and are primarily used for cutoff walls.
Features:
Provides minimal bending resistance.
Offers excellent water-tightness when interlocks are sealed.
Applications: Suitable for seepage control and cutoff walls in dams and embankments.
2. Types by Manufacturing Process
(1) Hot-Rolled Sheet Pile
Description: Manufactured by hot rolling steel through a series of shaping rollers.
Features:
Strong interlock strength.
High durability and resistance to stress.
Available in larger sizes and lengths.
Applications: Preferred for permanent structures and heavy-duty applications.
(2) Cold-Formed Sheet Pile
Description: Produced by forming steel plates into the desired shape through a cold-forming process.
Features:
Cost-effective compared to hot-rolled piles.
Lighter in weight but with weaker interlocks.
Limited in length and size.
Applications: Suitable for temporary or light-duty structures.
3. Types by Connection Mechanism
(1) Larssen Sheet Pile
Description: Interlocking system with a curved connection that ensures tight sealing.
Features:
High strength and excellent water-tightness.
Easy to drive and extract.
Applications: Used in cofferdams, retaining walls, and flood barriers.
(2) Box Sheet Pile
Description: Double sheet piles are welded or riveted to form a box-like structure.
Features:
High strength-to-weight ratio.
Suitable for high-load applications.
Applications: Often used in piers and bridge abutments.
4. Types by Material
(1) Carbon Steel Sheet Pile
Cost-effective and widely available.
Moderate strength and corrosion resistance.
(2) Weathering Steel Sheet Pile
Enhanced corrosion resistance due to the formation of a protective oxide layer.
Ideal for marine and harsh environmental conditions.
(3) Stainless Steel Sheet Pile
Superior corrosion resistance and durability.
Used in high-value applications, such as chemical plants and marine environments.