1. Structure and construction

Basic composition: Steel pipe pile is mainly composed of steel pipe, tongue and groove, tongue and groove pin and other components. The left end of the steel pipe diameter is vertically connected to the tongue and groove groove. The cross section of the tongue and groove groove is a square frame with one side open, and a reinforcing rib is provided on the side; the right end of the steel pipe diameter is vertically connected to the tongue and groove pin at the radial position, and the groove section of the tongue and groove pin is I-shaped.

Specifications and sizes: The size specifications of steel pipe piles are diverse, and the diameter range is generally between 400-2000mm. The most commonly used is about 1800mm. There are also literatures indicating that the diameter ranges from φ406.4φ2032.0mm. The outer diameter of the steel pipe is generally between 50-120cm, and the wall thickness is mostly between 1-1.8cm, but there are also thicker ones, such as 625mm. The length of the steel pipe pile is generally determined according to the needs of the project. The common single-section length is 13m or 15m, and it can also be composed of multiple sections.

2. Performance characteristics

Strong bearing capacity: Steel pipe piles have the characteristics of light weight, good rigidity, and high bearing capacity, and are suitable for various complex geological conditions.

Convenient construction: There are various construction methods for steel pipe piles, including vertical pipe method, casing method, hole digging method, pipe pulling method, etc., and the appropriate construction method can be selected according to the specific engineering conditions.

Good sealing: The design of the tongue-and-groove steel pipe pile enables the piles to overlap closely, forming a good sealing effect.

Strong adaptability: Steel pipe piles can be processed into various shapes, such as square, rectangular, conical, trapezoidal, spiral, etc., to adapt to different use conditions.

3. Application field

Steel pipe piles are widely used in engineering fields such as docks, ports, bridges, buildings, water conservancy, and transportation. In the construction of docks and ports, steel pipe piles are often used as basic materials, which can withstand huge loads and remain stable. In bridge engineering, steel pipe piles can be used for the supporting structures of piers and abutments. In addition, steel pipe piles are also commonly used in water conservancy projects such as cofferdams and embankments, as well as the basic construction of transportation projects such as roads and railways.

IV. Advantages and Disadvantages

Advantages:

Strong bearing capacity: able to withstand large loads and remain stable.

Convenient construction: a variety of construction methods are available, with strong adaptability.

Good sealing: piles are tightly overlapped to prevent leakage.

Strong adaptability: can be processed into various shapes to adapt to different use conditions.

Disadvantages:

Large amount of steel: resulting in relatively high project costs.

Complicated pile driving equipment: requires professional equipment and technology to operate.

Large vibration and noise: may have a certain impact on the surrounding environment.

Poor protection of pile materials is easy to corrode: anti-corrosion measures need to be strengthened to extend service life.

In summary, steel pipe piles are a basic engineering material with excellent performance and wide application. When selecting and using steel pipe piles, comprehensive consideration and selection are required based on specific engineering conditions and requirements.