Steel pipe piles are widely used in various situations such as support piles and friction piles. Especially when it is used as a support pile, since it can be fully driven into a relatively hard support layer, it can exert the bearing effect of the entire section strength of the steel material. Even in the deep soft soil foundation of more than 30m, the steel pipe pile can also be sunk into a relatively solid supporting layer, and its bearing capacity can be fully exerted. In general, the main features of steel pipe piles are:
1. Can withstand strong impact. Its penetration and penetration properties are superior due to its ability to withstand strong impact forces. If there is a hard interlayer buried in the foundation with a small thickness and a standard penetration number IV=30, it can pass through smoothly. It can be penetrated into the solid support layer according to the design requirements.
2. Large bearing capacity. Since the steel as the base material of the steel pipe pile has a high yield strength, a large bearing capacity can be obtained as long as the pile is sunk on a solid supporting layer.
3. Large horizontal resistance and strong resistance to lateral force. Since steel pipe piles have a large section stiffness and a large resistance moment against bending moments, they can withstand large horizontal forces. In addition, large-diameter thick-walled pipes can also be used. Therefore, it can be widely used on bollards, bridge abutments and bridge piers to bear lateral force.
4. Great flexibility in design. The wall thickness of each single pipe of the steel pipe pile can be changed as required, and the outer diameter that meets the design bearing requirements can also be selected as required.
5. The pile length is easy to adjust. Prepared piles may appear longer or shorter when the layer that serves as the support layer for the pile tip is undulating. Since steel pipe piles can be freely welded to length or cut to length by gas cutting, it is easy to adjust the length of the pile, so that the construction can be carried out smoothly.
6. The joints are safe and suitable for long-dimension construction. Since the steel pipe piles are easy to make welded joints, the pile sections are spliced together, and the strength of the joints is equal to that of the base material, so the embedding depth that meets the needs can be determined.
7. It is easy to combine with the upper structure. By pre-welding the steel bars to the upper part of the pile, the steel pipe pile can be easily combined with the upper part of the cap and the concrete. It can also be welded directly with the upper structure, thus ensuring that the upper and lower parts work together.
8. Minimal soil discharge during piling. Steel pipe piles can be driven into the opening, relatively speaking, the cross-sectional area of the soil discharge is small, and the driving efficiency is high. Then it has the following characteristics,
a: The disturbance effect on the clay foundation is small.
b: There is no adverse effect on adjacent buildings (structures), and very intensive piling construction can be carried out on a small area site.
c: It is most suitable for high-rise buildings, large-scale mechanical equipment foundations and harbor structures, etc., where large loads are applied to small areas.
d: Easy to carry and stack. The steel pipe pile is light in weight, so there is no need to worry about damage, and it is easy to carry and stack.
e: Save engineering costs and shorten the construction period. Since steel pipe piles have many of the above characteristics, if these characteristics can be fully utilized in actual projects, the construction period can be shortened. Steel pipe piles are the most suitable for rapid construction. Therefore, its comprehensive economic benefits are high, and relatively speaking, it can save engineering costs.
Post time: Nov-21-2022