Steel pipe piles and steel sheet piles are two common foundation engineering materials, and they are widely used in foundation engineering. Although they are all steel products, their structures, and uses are very different. This article will compare steel pipe piles and steel sheet piles in terms of structure, performance, application, etc., in order to better understand their differences.

Structure

Steel pipe piles are made of steel pipes, and their cross-sectional shapes are round, square, rectangular, etc., and round and square are commonly used. The length of the steel pipe pile is generally between 10-100 meters, and the diameter is between 0.3-1.2 meters. The wall thickness of steel pipe piles is generally between 5-20 mm, and there are also thicker ones. The ends of steel pipe piles can be in different forms such as closed, open, and expanded.

Steel sheet piles are made of steel plates, and their cross-sectional shapes are U-shaped, Z-shaped, straight, etc. U-shaped and Z-shaped are commonly used. The length of the steel sheet pile is generally between 6-12 meters, the width is between 400-600 mm, and the thickness is between 8-16 mm. The end of the steel sheet pile can adopt different forms such as lock type, gusset type, welded type, etc.

Performance

1. Bearing capacity

The bearing capacity of the steel pipe pile mainly depends on its cross-sectional area and wall thickness. Generally speaking, the bearing capacity of the steel pipe pile is relatively large, and it can bear larger loads. The bearing capacity of the steel sheet pile mainly depends on its cross-sectional shape and thickness. Generally speaking, the bearing capacity of the steel sheet pile is relatively small and can only bear a small load.

2. Bending resistance

Steel pipe piles have relatively good bending resistance and can withstand large bending forces. Steel sheet piles have relatively poor bending resistance and are prone to bending deformation.

3. Anti-seismic performance

Steel pipe piles have relatively good seismic performance and can withstand large earthquake forces. Steel sheet piles have poor seismic performance and are prone to damage.

4. Corrosion resistance

Steel pipe piles have better corrosion resistance and can be used for a long time in humid and corrosive environments. Steel sheet piles have poor corrosion resistance and are prone to rust and corrosion.

Application

Both steel pipe piles and steel sheet piles are commonly used materials in foundation engineering, but their application ranges are different.

1. Application of steel pipe piles

(1) Bridge foundation: Steel pipe piles can be used for bridge piers, bridge abutments, bridge foundations, and other foundations.

(2) Wharf engineering: Steel pipe piles can be used for pile foundations, bank revetments, wharf piers, etc. of wharves.

(3) Building foundation: Steel pipe piles can be used for building foundations, foundations, basements, etc.

(4) Oilfield engineering: steel pipe piles can be used for oil wells, oil pipes, oil tanks, etc.

2. Application of steel sheet pile

(1) Retaining wall: Steel sheet piles can be used in the construction of retaining walls, which can effectively prevent landslides and collapses.

(2) River engineering: Steel sheet piles can be used for bank revetment, dams, riverbed reinforcement, etc. of rivers.

(3) Building foundation: Steel sheet piles can be used for building foundations, foundations, basements, etc.

(4) Marine engineering: steel sheet piles can be used for seawalls, coastal protection, docks, etc. in marine engineering.

Both steel pipe piles and steel sheet piles are commonly used materials in foundation engineering, and their structures and properties are quite different. Steel pipe piles have relatively large bearing capacity, better-bending resistance and earthquake resistance, and better corrosion resistance. They are suitable for bridge foundations, wharf projects, building foundations, and oil field projects. Steel sheet piles have relatively small bearing capacity, relatively poor bending resistance and seismic performance, and relatively poor corrosion resistance. They are suitable for retaining walls, river engineering, building foundations, marine engineering, etc. When selecting steel pipe piles and steel sheet piles, it is necessary to choose according to specific engineering requirements and environmental conditions to ensure the quality and safety of the project.

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