Classification of sheet piles

Steel sheet pile products are divided into cold-formed thin-walled steel sheet piles and hot-rolled steel sheet piles according to the production process.

(1) Cold-formed steel sheet piles continuously cold-bend the steel strip to form Z-shaped, U-shaped or other shapes of cross-section, which can be connected to each other through locks. There are two types of non-bite type cold-formed steel sheet piles (also called channel plates) and bite-type cold-formed steel sheet piles (divided into L-type, S-type, U-type, Z-type). Production process: The thin plate (commonly used thickness 8mm ~ 14mm) is continuously rolled and formed in the cold bending unit. Advantages: less investment in production lines, lower production costs, and flexible product sizing control. Disadvantages: The thickness of each part of the pile body is the same, the section size cannot be optimized, resulting in an increase in the amount of steel used, the shape of the locking part is difficult to control, the joints are not tightly buckled, and the water cannot be stopped, and the pile body is prone to tearing during use.

(2) The hot-rolled steel sheet pile has a tight water barrier with its lock bite. The world’s hot-rolled steel sheet piles mainly include U-type, Z-type, AS-type, H-type and dozens of specifications. Production process: It is formed by high temperature rolling in a section steel rolling mill. Advantages: standard size, superior performance, reasonable cross-section, high quality, and tight water-resistance for locking. Disadvantages: technical difficulty, high production cost, inflexible specification series.

Advantages of steel sheet piles:

1. High strength, easy to drive into hard soil layer, the continuous wall composed of steel sheet piles has high strength and rigidity;

2. It can be constructed in deep water, and if necessary, add diagonal supports to form a cage;

3. The waterproof performance is good, and the joints of the steel sheet piles are tightly combined, which can naturally prevent seepage;

4. Cofferdams of various shapes can be formed according to needs, and can be reused many times;

5. Suitable for rapid implementation of flood control, subsidence, quicksand, earthquake and other disaster relief and prevention;

Steel sheet piles are suitable for many temporary and permanent engineering structures, and it is characterized by providing the best strength and durability with the least amount of steel, while guaranteeing its piling performance. The steel sheet piles are connected by a series of similar joints (locks) to form a continuous wall, and the design of the locks is required to facilitate connection and piling.