Basic composition: Steel pipe piles are mainly composed of steel pipes, tongue-and-groove mortises, tongue-and-groove dowels and other components. The tongue-and-groove is vertically connected to the left end of the steel pipe diameter. The cross section of the tongue-and-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: Steel pipe piles have various sizes and specifications. Their diameters generally range from 400-2000mm. The most commonly used ones are around 1800mm. Some literature also indicates that their diameters range from φ406.4φ2032.0mm. The outer diameter of the steel pipe is generally between 50-120cm, and the wall thickness is mostly 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. 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 allows the piles to overlap tightly, 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 conditions of use.

3. Application fields

Steel pipe piles are widely used in engineering fields such as docks, ports, bridges, buildings, water conservancy, and transportation. In dock and port construction, 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 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.

4. Advantages and disadvantages

Advantages:

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

Convenient construction: A variety of construction methods are available, and the adaptability is strong.

Good sealing: The piles are tightly overlapped to prevent leakage.

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

Disadvantages:

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

Pile driving equipment is more complicated: professional equipment and technology are required for operation.

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

Poorly protected pile materials are prone to corrosion: anti-corrosion measures need to be strengthened to extend the service life.

In summary, steel pipe piles are a kind of foundation engineering material with excellent performance and wide application. When selecting and using steel pipe piles, it is necessary to make comprehensive considerations and selections based on specific engineering conditions and requirements.