Prefabricated pile

Abstract

The invention discloses a prefabricated pile. The prefabricated pile comprises at least one fine pile section and at least one thick pile section which are formed into an integrated structure in the axial direction, the circular peripheral wall of the fine pile section is annularly provided with a plurality of convex rib plates, wherein, the length direction of the rib plates is consistent with the length direction of the prefabricated pile, the radial distance from the top end surfaces of the rib plates to the central axis of the prefabricated pile is less than the exradius of the thick pilesection, and a shaft shoulder surface is formed between the fine pile section and the adjacent thick pile section. According to the structural design, the part of the fine pile section has more contact area with a surrounding soil mass, it is also guaranteed that the surrounding soil mass of the fine pile section is surrounded into an integrated structure, the surrounding soil mass is more closelyattached to the outer wall of the fine pile section, thus, the more contact area and the closer attaching effect between the fine pile section and the surrounding soil mass improve friction force between the pile body and the surrounding soil mass, and thus the uplift bearing capacity of the prefabricated pile can be greatly enhanced.

Description

technical field [0001] The invention relates to the field of concrete pipe piles, in particular to a prefabricated pile. Background technique [0002] Concrete pipe piles are basic building materials commonly used in the fields of construction, transportation, and port construction. The shape of traditional concrete pipe piles is generally a linear square pipe pile or a round pipe pile. For example, a Chinese invention patent (CN101761075A) discloses a circular Solid prestressed concrete pipe pile, the circular solid prestressed concrete pipe pile includes a solid concrete pile body and a reinforcement cage embedded in the pile body, the two ends of the concrete pile body are provided with end skirts, and the reinforcement cage is composed of Several equal-length prestressed main reinforcements and spiral reinforcements are bound together. The prestressed main reinforcements are evenly distributed on the outer wall of the concrete pile with the centerline of the concrete rod...

AI Technical Summary

Problems solved by technology

[0003] Although this kind of circular solid prestressed concrete pipe pile has better crack resistance and seismic performance, the shortcoming of the above-mentioned circular solid prestressed concrete pipe pile is: because the outer wall surface of the concrete pile body is a smooth circular shape surface, thus resulting in less friction between the pile and the soil, when it is necessary to meet a larger axial bearing capacity or pull-out force, it is necessary to increase the length or outer diameter of the pipe pile, which will increase the overall The cost of pile foundation works

[0005] Compared with the traditional linear pipe pile, although the variable cross-section concave-convex pile with this structure has better uplift bearing capacity, in the axial projection area corresponding to the large cross-section section, due to the outer wall surface of the small cross-section pile The set of multiple ribs divides the soil around the pile body into multiple isolated arc-shaped blocks, which makes the arc-shaped blocks not closely attached to the outer wall of the small-section pile section, thus causing the pile body and the surrounding soil to The relative friction between them is limited, so the uplift bearing performance of variable cross-section concave-convex piles needs to be strengthened.

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