ERW Steel Pipe for subway piling

The large straight seam steel pipes used in subway piling are a type of steel pipe used in underground structure construction. They usually have larger diameters and thicknesses to adapt to the high requirements for pile foundation bearing capacity and stability in subway construction.

The large straight seam steel pipes used in subway piling are a type of steel pipe used in underground structure construction. They usually have larger diameters and thicknesses to adapt to the high requirements for pile foundation bearing capacity and stability in subway construction. The following is some key information about large straight seam steel pipes for subway piling:

Material and strength: Straight seam steel pipes are generally made of ordinary carbon steel or higher steel grade materials, with good tensile strength and yield strength, such as tensile strength of 402MPa and yield strength of 235.2MPa, or selected according to design requirements.

Processing technology: Straight seam steel pipes are divided according to processing technology, including spiral seam steel pipes and straight seam steel pipes. Spiral seam steel pipes are often used in engineering because of their high stiffness, but straight seam steel pipes also have their specific application scenarios.

Length and combination: Due to limitations of transportation and construction equipment, steel pipe piles are often composed of an upper section pile, a lower section pile and several middle section piles. The length of each section is generally 13m or 15m.

Advantages: Straight seam steel pipes are light in weight, good in rigidity, easy to load, unload, transport and stack, and not easily damaged. Due to the high strength of steel, it can be effectively driven into hard soil and obtain a great single pile bearing capacity.

Adjustability: The length of the pile can be adjusted by lengthening or cutting as needed, which increases the flexibility of use.

Construction impact: The open design of the lower end of the straight-seam steel pipe pile reduces the amount of soil squeezed during the piling process and has less impact on adjacent buildings.

Connection method: The joint connection is simple, usually using electric welding, which is easy to operate, high strength and safe to use.

Construction efficiency: The project quality is reliable and the construction speed is fast, which is suitable for the rapid construction requirements of subway construction.

Manufacturing process: The manufacturing process of large-diameter straight seam steel pipes includes plate detection, edge milling, pre-bending, forming, pre-welding, internal and external welding, finishing and other steps.

Scope of application: Straight seam steel pipes are widely used in the production of low-pressure and high-pressure fluid transportation, chemical and chemical pipelines, high-grade construction steel, pipeline steel and other high-grade materials. They are suitable for the production of steel supports, steel pipe columns, lattice columns, steel purlins, steel protection, etc. .

In summary, large straight-slit steel pipes for subway piling have been widely used in the construction of subways and other infrastructure due to their high strength, good construction performance and reliability.