High-performance large-diameter concrete pipe pile

Abstract

The utility model provides a high-performance large-diameter concrete pipe pile which comprises a pipe pile body formed by pouring concrete, the outer diameter of the pipe pile body ranges from 1.2 m to 2.5 m, and the wall thickness of the pipe pile body ranges from 150 mm to 300 mm. The longitudinal main reinforcements are uniformly distributed in the circumferential direction of the inner wall of the pipe pile body, the longitudinal main reinforcements are HRB500-grade reinforcements, the diameter is 28-40 mm, and the distance between every two adjacent longitudinal main reinforcements is 50-100 mm; the spiral stirrups are wound on the outer sides of the longitudinal main reinforcements, the spiral stirrups are HRB400-grade reinforcements, the diameter of each spiral stirrup is 10-16 mm, and the screw pitch of each spiral stirrup is 80-150 mm; the end flange plates are welded to the two ends of the pipe pile body, bolt holes which are annularly distributed are formed in the flange plates, the hole diameter ranges from 30 mm to 50 mm, and the hole distance ranges from 100 mm to 200 mm; the inner wall reinforcing ribs axially extend along the inner wall of the pipe pile body and are distributed in a crossed manner, the height of the inner wall reinforcing ribs is 50-100mm, and the thickness of the inner wall reinforcing ribs is 30-60mm. By optimizing materials, the structure and the connecting mode, the bearing capacity, durability and construction efficiency are remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the field of concrete pipe pile technology, specifically relating to a high-performance large-diameter concrete pipe pile. Background Technology

[0002] Concrete pipe piles are precast components widely used in engineering fields such as bridges, ports, and building foundations. Their performance directly affects the stability and durability of the engineering structure. Traditional concrete pipe piles have the following technical problems: ordinary concrete has low strength and the steel reinforcement configuration is simple, resulting in limited compressive and bending resistance, making it difficult to meet the requirements of large-diameter, high-load projects; pipe piles are exposed to humid, saline-alkali, or chemically corrosive environments for a long time, which makes the surface prone to cracking and peeling, accelerates the corrosion of steel reinforcement, and shortens the service life; the ends of traditional pipe piles are mostly flat or simple tenon and mortise structures, which are prone to misalignment during connection and lack effective sealing, easily leading to leakage or stress concentration. Utility Model Content

[0003] The main objective of this invention is to provide a high-performance, large-diameter concrete pipe pile that significantly improves bearing capacity, durability, and construction efficiency by optimizing materials, structure, and connection methods.

[0004] To achieve the above objectives, this utility model provides a high-performance large-diameter concrete pipe pile. The high-performance large-diameter concrete pipe pile includes a pipe pile body, cast from concrete, with an outer diameter of 1.2-2.5 meters and a wall thickness of 150-300 millimeters; longitudinal main reinforcement bars, evenly distributed circumferentially along the inner wall of the pipe pile body, the longitudinal main reinforcement bars being HRB500 grade steel bars with a diameter of 28-40 millimeters and a spacing of 50-100 millimeters; spiral stirrups, wrapped around the outer side of the longitudinal main reinforcement bars, the spiral stirrups being HRB400 grade steel bars with a diameter of 10-16 millimeters and a pitch of 80-150 millimeters; end flanges, welded to both ends of the pipe pile body, the flanges having annularly distributed bolt holes with a diameter of 30-50 millimeters and a spacing of 100-200 millimeters; and inner wall reinforcing ribs, extending axially along the inner wall of the pipe pile body in a cross-shaped distribution, with a height of 50-100 millimeters and a thickness of 30-60 millimeters.

[0005] This utility model provides a high-performance, large-diameter concrete pipe pile. The high-strength concrete and thick wall design significantly enhance compressive strength, making it suitable for heavy-load applications such as deep-sea pile foundations and super high-rise buildings. The longitudinal main reinforcement and spiral stirrups form a "three-dimensional stress network," collaboratively resisting axial pressure and lateral shear force, preventing deformation of the reinforcing steel skeleton. The flange, through bolt holes, enables quick and precise connection, reducing construction errors and improving connection stability. The inner wall's cross-shaped reinforcing ribs enhance the radial stiffness of the pipe pile, suppressing concrete shrinkage cracks and optimizing stress distribution. This application significantly improves load-bearing capacity, durability, and construction efficiency through optimized materials, structure, and connection methods.

[0006] In one possible implementation, the outer surface of the pipe pile body is coated with an epoxy resin anti-corrosion layer with a thickness of 0.5-1.2 mm, and the anti-corrosion layer is embedded with a fiberglass mesh. The epoxy resin layer provides a chemically inert barrier to resist corrosion from seawater, acid rain, and other corrosive media, while the fiberglass mesh enhances the impact resistance of the anti-corrosion layer, preventing the coating from peeling off during transportation or construction and extending the service life of the pipe pile.

[0007] In one possible implementation, the longitudinal main bars and spiral stirrups are fixed together by spot welding to form a three-dimensional steel reinforcement skeleton. Reinforcing bars, which are L-shaped short bars with a length of 100-200 mm, are provided at the nodes of the steel reinforcement skeleton. The spot welding process ensures the integrity of the steel reinforcement skeleton, avoiding the displacement or loosening of the bars caused by traditional tying. The L-shaped reinforcing bars strengthen the node connections, disperse local stress, prevent the stirrups from detaching from the main bars, and improve seismic performance.

[0008] In one possible implementation, prestressed anchoring holes are provided at the intersections of the inner wall reinforcing ribs. Steel strands are threaded through the anchoring holes, and both ends of the steel strands are tensioned and fixed by anchors. The prestressed steel strands apply pre-stress to the pipe pile, offsetting the tensile stress caused by external loads, significantly improving crack resistance. The combined design of the anchoring holes and steel strands achieves "active reinforcement," suitable for soft soil foundations or dynamic load scenarios, reducing the risk of pipe pile deformation.

[0009] In one possible implementation, prestressed anchoring holes are provided at the intersections of the inner wall reinforcing ribs, and steel strands are threaded through these holes. The ends of the steel strands are tensioned and fixed by anchors. This multi-stage prestressing system achieves uniform stress distribution and avoids localized stress concentration. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a high-performance large-diameter concrete pipe pile structure provided by this utility model. Detailed Implementation

[0011] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0012] In the description of this application, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0013] In the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0014] See attached diagram. Figure 1 , Figure 1 This is a schematic diagram of a high-performance large-diameter concrete pipe pile structure provided by this utility model, as shown below. Figure 1 As shown, the present invention provides a high-performance large-diameter concrete pipe pile, comprising a pipe pile body 1, which is cast from concrete, with an outer diameter of 1.2-2.5 meters and a wall thickness of 150-300 mm; longitudinal main reinforcement 2, which is evenly distributed along the inner wall of the pipe pile body 1, wherein the longitudinal main reinforcement 2 is HRB500 grade steel bar with a diameter of 28-40 mm and a spacing of 50-100 mm; spiral stirrups 3, which are wound around the outer side of the longitudinal main reinforcement 2, wherein the spiral stirrups 3 are HRB400 grade steel bars with a diameter of 10-16 mm and a pitch of 80-150 mm; end flanges 4, which are welded to both ends of the pipe pile body 1, wherein the flanges 4 are provided with annularly distributed bolt holes with a diameter of 30-50 mm and a spacing of 100-200 mm; and inner wall reinforcing ribs 5, which extend axially along the inner wall of the pipe pile body 1, are distributed in a cross pattern, with a height of 50-100 mm and a thickness of 30-60 mm.

[0015] This utility model provides a high-performance, large-diameter concrete pipe pile. The high-strength concrete and thick wall design significantly enhance compressive strength, making it suitable for heavy-load applications such as deep-sea pile foundations and super high-rise buildings. The longitudinal main reinforcement 2 and spiral stirrups 3 form a "three-dimensional stress network," collaboratively resisting axial pressure and lateral shear force, preventing deformation of the reinforcing steel skeleton. The flange 4 achieves rapid and precise connection via bolt holes, reducing construction errors and improving connection stability. The inner wall cross-shaped reinforcing ribs enhance the radial stiffness of the pipe pile, suppressing concrete shrinkage cracks and optimizing stress distribution. This application significantly improves load-bearing capacity, durability, and construction efficiency through optimized materials, structure, and connection methods.

[0016] In one possible implementation, the outer surface of the pipe pile body 1 is coated with an epoxy resin anti-corrosion layer with a thickness of 0.5-1.2 mm, and the anti-corrosion layer is embedded with a fiberglass mesh. The epoxy resin layer provides a chemically inert barrier to resist corrosion from seawater, acid rain, and other corrosive media, while the fiberglass mesh enhances the impact resistance of the anti-corrosion layer, preventing the coating from peeling off during transportation or construction and extending the service life of the pipe pile.

[0017] In one possible implementation, the longitudinal main reinforcement 2 and the spiral stirrups 3 are fixed together by spot welding to form a three-dimensional steel reinforcement skeleton. Reinforcing ribs are provided at the nodes of the steel reinforcement skeleton. These reinforcing ribs are L-shaped short bars with a length of 100-200 mm. The spot welding process ensures the integrity of the steel reinforcement skeleton, avoiding the displacement or loosening of the reinforcement caused by traditional tying. The L-shaped reinforcing ribs strengthen the node connections, disperse local stress, prevent the stirrups from detaching from the main reinforcement, and improve seismic performance.

[0018] In one possible implementation, prestressed anchoring holes are provided at the intersections of the inner wall reinforcing ribs 5. Steel strands are threaded through the anchoring holes, and both ends of the steel strands are tensioned and fixed by anchors. The prestressed steel strands apply pre-stress to the pipe pile, offsetting the tensile stress caused by external loads, significantly improving crack resistance. The combined design of the anchoring holes and steel strands achieves "active reinforcement," suitable for soft soil foundations or dynamic load scenarios, reducing the risk of pipe pile deformation.

[0019] In one possible implementation, prestressed anchoring holes are provided at the intersections of the inner wall reinforcing ribs 5, and steel strands are threaded through the anchoring holes. The two ends of the steel strands are tensioned and fixed by anchors. The multi-stage prestressing system achieves uniform stress distribution and avoids local stress concentration.

[0020] It is worth mentioning that those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-performance large-diameter concrete pipe pile, characterized in that, include: The pipe pile body is made of concrete, with an outer diameter of 1.2-2.5 meters and a wall thickness of 150-300 millimeters; The longitudinal main reinforcement is evenly distributed along the circumference of the inner wall of the pipe pile body. The longitudinal main reinforcement is HRB500 grade steel bar with a diameter of 28-40 mm and a spacing of 50-100 mm. Spiral stirrups are wrapped around the outside of the longitudinal main bars. The spiral stirrups are HRB400 grade steel bars with a diameter of 10-16 mm and a pitch of 80-150 mm. The end flanges are welded to both ends of the pipe pile body. The flanges are provided with annularly distributed bolt holes with a diameter of 30-50 mm and a spacing of 100-200 mm. The inner wall reinforcing ribs extend axially along the inner wall of the pipe pile body, are distributed in a cross shape, and have a height of 50-100 mm and a thickness of 30-60 mm.

2. The high-performance large-diameter concrete pipe pile according to claim 1, characterized in that, The outer surface of the pipe pile body is coated with an epoxy resin anti-corrosion layer with a thickness of 0.5-1.2 mm, and the anti-corrosion layer is embedded with glass fiber mesh.

3. The high-performance large-diameter concrete pipe pile according to claim 2, characterized in that, The longitudinal main bars and spiral stirrups are fixed by spot welding to form a three-dimensional steel reinforcement skeleton. The nodes of the steel reinforcement skeleton are provided with reinforcing bars, which are L-shaped short bars with a length of 100-200 mm.

4. The high-performance large-diameter concrete pipe pile according to claim 3, characterized in that, The inner wall reinforcing ribs are provided with prestressed anchoring holes, and steel strands are threaded through the anchoring holes. The two ends of the steel strands are tensioned and fixed by anchors.

5. The high-performance large-diameter concrete pipe pile according to claim 4, characterized in that, The inner wall reinforcing ribs are provided with prestressed anchoring holes, and steel strands are threaded through the anchoring holes. The two ends of the steel strands are tensioned and fixed by anchors.

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