Cold-formed steel sheet pile (also called trough plate) and cold-formed steel sheet pile (divided into L type, S type, U type and Z type).

Production technology: thin plate (usually 8 mm ~ 14 mm in thickness) is continuously rolled in the cold bending unit.

Advantages: less production line investment, low production cost and flexible product length control.

Disadvantages: the thickness of each part of the pile body is consistent, and the cross-section size cannot be optimized, which leads to the increase of steel consumption, the shape of the locking part is difficult to control, the buckle at the joint is not tight, and the pile body is easy to tear during use.

(2) Hot rolled steel sheet pile:

There are dozens of specifications of hot-rolled steel sheet piles in the world, including U-type, Z-type, AS-type and H-type. At present, the production, processing and installation processes of Z-type and AS-type steel sheet piles are complicated, which are mainly used in Europe and America. U-shaped steel sheet piles are mainly used in China.

Production technology: it is made by high-temperature rolling with a section steel mill.

Advantages: standard size, superior performance, reasonable cross section, high quality and tight waterproof lock.

Disadvantages: technical difficulty, high production cost and inflexible specification series.

Extended data

In engineering construction, the application scope of cold-formed steel sheet piles is narrow, and most of them are used as auxiliary materials. Hot rolled steel sheet pile has always been the leading product in engineering application.

Based on the advantages of steel sheet piles in construction, the General Administration of Quality Supervision, Inspection and Quarantine and the National Standardization Administration issued the national standard for hot-rolled U-shaped steel sheet piles on May 14, 2007, which was officially implemented on February 1 2007.

However, due to low production efficiency, poor economic benefits, less domestic demand and insufficient technical experience, the trial production failed to continue.

Cold-formed steel sheet piles are continuously rolled by cold-formed units, and the side locks can be continuously superimposed to form sheet pile wall steel structure.

Cold-formed steel sheet piles are made of thin plates (usually 8 mm ~ 14 mm) and processed by cold-formed units. It has lower production cost, cheaper price and more flexible length control.

However, due to the simple processing method, the thickness of each part of the pile body is the same, and the section size can not be optimized, which leads to the increase of steel consumption; The shape of the lock mouth is difficult to control, and the buckle at the joint is not tight, so it is impossible to stop water; Limited by the capacity of cold bending processing equipment, only products with low strength grade and thin thickness can be produced; Moreover, the stress produced in the cold bending process is large, and the pile body is easy to tear in use, so its application has great limitations.

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