Novel prestressed high-strength concrete pipe pile with snap connection

Abstract

This utility model discloses a novel prestressed high-strength concrete pipe pile with snap-fit ​​connection, comprising an upper and lower pipe pile made of concrete and coaxially fixed. Steel end plates are anchored on the axial end faces of the coaxially joined upper and lower pipe piles. Connecting plates are fixed to the outer periphery of each steel end plate to restrict the relative circumferential rotational displacement of the upper and lower pipe piles. Socket positioning units are provided on the opposing end faces of the two steel end plates, and structural adhesive is coated on the opposing end faces of the two steel end plates to circumferentially shield the positioning units. The socket units provide axial and radial positioning constraints for the upper and lower pipe piles. This pipe pile uses a snap-fit ​​connection, which is convenient and quick, greatly shortening the connection time of precast piles and improving construction efficiency. At the same time, the use of structural adhesive on the connection surfaces improves the sealing performance of the connection surfaces and enhances the waterproofing and corrosion resistance of the joint.

Description

Technical Field

[0001] This utility model relates to the field of pile construction technology, specifically to a novel prestressed high-strength concrete pipe pile with snap-fit ​​connection. Background Technology

[0002] Currently, the main connection methods for prestressed high-strength concrete pipe piles include welding, grouting, and flange connections. Among these, welding requires precise control of the gap between the upper and lower piles to prevent center deviation. This high level of skill necessitates highly skilled welders to ensure reliable welding quality, which is crucial for the durability and load-bearing capacity of the pipe pile. Grouting requires post-grouting curing and has stringent requirements for anchor holes and reinforcing bars, thus limiting its practical application. With the rise of green construction and green building practices, mechanized construction of precast piles has become a major highlight of carbon reduction and environmental protection measures. The application of mechanical connections in pile foundation construction is increasing, with flange connections being a common example. These methods improve construction efficiency while ensuring reliable connections.

[0003] However, traditional welding and grouting connections have gradually lost their competitiveness due to factors such as on-site welding operations, low construction efficiency, and high construction quality requirements. Flange mechanical connections increase the connection area and steel consumption, which has a certain impact on pile driving and short-term soil resistance to the pile foundation. In addition, flange connection bolts are susceptible to corrosion, reducing the service life of the pile.

[0004] In summary, how to design a new type of prestressed high-strength concrete pipe pile connection method that avoids connection corrosion problems without increasing construction material costs has become a technical problem that urgently needs to be solved by those in this field. Utility Model Content

[0005] This utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this utility model is to propose a novel prestressed high-strength concrete pipe pile with a snap-fit ​​connection. This pipe pile uses a snap-fit ​​connection, which is convenient and quick, greatly shortening the connection time of precast piles and improving construction efficiency. At the same time, the use of structural adhesive on the connection surface improves the sealing of the connection surface and enhances the waterproofing and corrosion resistance of the joint.

[0006] To address the aforementioned problems, this utility model provides a novel prestressed high-strength concrete pipe pile with snap-fit ​​connection, comprising an upper pipe pile and a lower pipe pile made of concrete and coaxially fixed together. Steel end plates are anchored on the axial end faces of the coaxially joined upper and lower pipe piles. Connecting plates that restrict the relative circumferential rotational displacement of the upper and lower pipe piles are fixed to the outer periphery of each steel end plate. Socket positioning units are provided on the opposing end faces of the two steel end plates, and structural adhesive is coated on the opposing end faces of the two steel end plates to circumferentially shield the positioning units. The socket units provide axial and radial positioning constraints for the upper and lower pipe piles.

[0007] Preferably, a steel plate anchor bar is fixed on the axial end face of the steel end plate, and the steel plate anchor bar is anchored inside the concrete tubular structure of the upper and lower pipe piles.

[0008] Preferably, the socket unit includes a T-shaped plug and a T-shaped slot; the T-shaped plug is circumferentially and evenly fixed on the bottom surface of the upper section of the pipe pile steel end plate; the T-shaped slot is circumferentially and evenly opened on the top surface of the lower section of the pipe pile steel end plate.

[0009] Preferably, the arc length of the T-shaped slot is greater than the arc length of the T-shaped plug, one end of the T-shaped slot is provided with a socket to accommodate the axial displacement of the T-shaped plug, and the other end of the T-shaped slot is fixed with a limiting plate to axially limit the T-shaped plug.

[0010] Preferably, the upper section of the pipe pile connecting plate extends downward to the level of the lower section of the pipe pile connecting plate and is fixedly connected by bolts.

[0011] The advantages of this utility model compared with the prior art are as follows:

[0012] Addressing the weaknesses in precast pipe pile splicing technology, this invention innovates a novel snap-fit ​​connection for prestressed high-strength concrete pipe piles. Compared to traditional splicing methods, the snap-fit ​​structure improves connection reliability while eliminating on-site welding, significantly increasing construction efficiency. Through the combined use of T-shaped inserts and T-shaped slots with structural adhesive, along with circumferential positioning of the connecting plate, the waterproof and corrosion-resistant properties of the pipe pile connection structure are effectively enhanced while ensuring the pipe pile's load-bearing capacity. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is an exploded cross-sectional view of the present invention;

[0015] Figure 2 This is a schematic diagram of the external structure of the connection posture of this utility model;

[0016] Figure 3 This is a bottom view of the upper section of the pipe pile in this utility model;

[0017] Figure 4 This is a top view of the lower section of the pipe pile in this utility model;

[0018] In the diagram: 1-Upper section pipe pile; 2-T-shaped insert; 3-T-shaped slot; 4-Connecting plate; 5-Lower section pipe pile; 6-Steel end plate; 7-Steel plate anchor bar; 8-Bolt; 9-Socket; 10-Limiting plate. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] Combination Figures 1-4 This utility model discloses a novel prestressed high-strength concrete pipe pile with snap-fit ​​connection, comprising an upper pipe pile 1 and a lower pipe pile 5 made of concrete and coaxially fixed. Steel end plates 6 are anchored on the axial end faces of the coaxially joined upper and lower pipe piles. Connecting plates 4 are fixed to the outer periphery of each steel end plate to restrict the relative circumferential rotational displacement of the upper and lower pipe piles. Socket positioning units are provided on the opposing end faces of the two steel end plates, and structural adhesive is coated on the opposing end faces of the two steel end plates to circumferentially shield the positioning units. The socket units provide axial and radial positioning constraints for the upper and lower pipe piles. Preferably, steel plate anchor bars 7 are fixed on the axial end faces of the steel end plates, and these steel plate anchor bars are anchored inside the concrete tubular structure of the upper and lower pipe piles.

[0023] Preferably, the socket unit includes a T-shaped plug 2 and a T-shaped slot 3; the T-shaped plugs are circumferentially and evenly fixed on the bottom surface of the upper section of the pipe pile steel end plate; the T-shaped slots are circumferentially and evenly distributed on the top surface of the lower section of the pipe pile steel end plate.

[0024] Preferably, the arc length of the T-shaped slot is greater than the arc length of the T-shaped plug, one end of the T-shaped slot is provided with a socket 9 to accommodate the axial displacement of the T-shaped plug, and the other end of the T-shaped slot is fixed with a limiting plate 10 to axially limit the T-shaped plug.

[0025] Preferably, the upper section of the pipe pile connecting plate extends downward to the level of the lower section of the pipe pile connecting plate and is fixedly connected by bolts 8.

[0026] To more clearly illustrate the specific implementation of this utility model, an embodiment is provided below:

[0027] This utility model discloses a novel prestressed high-strength concrete pipe pile with a snap-fit ​​connection. Compared with pipe piles with flange connections, its corrosion resistance advantages are as follows:

[0028] 1. In flange-connected pipe piles, the bolts directly bear stress in multiple directions, such as radial shear force and axial pull-out force. After corrosion, the bolt life is even shorter. In this utility model, the bolts are used for circumferential limiting connection between the upper and lower pipe piles. The radial shear force of the pipe pile after being squeezed by the soil is shared by the T-shaped insert and T-shaped slot, reducing the stress on the bolt connection and thus improving the service life of the bolts.

[0029] 2. The T-shaped insert and T-shaped slot are sealed with structural adhesive ring to prevent corrosion of the T-shaped insert or limiting plate.

[0030] Finally, any aspects of this utility model not described herein utilize existing mature products and technologies.

[0031] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A novel prestressed high-strength concrete pipe pile with snap-fit ​​connection, comprising an upper pipe pile section and a lower pipe pile section made of concrete and coaxially fixedly connected, characterized in that: Steel end plates are anchored on the axial end faces of the coaxially connected upper and lower pipe piles. A connecting plate is fixed on the outer periphery of the steel end plate to restrict the relative circumferential rotational displacement of the upper and lower pipe piles. Socket positioning units are provided on the opposing end faces of the two steel end plates, and structural adhesive that circumferentially shields the positioning units is coated on the opposing end faces of the two steel end plates. The socket units provide axial and radial positioning constraints for the upper and lower pipe piles.

2. The novel prestressed high-strength concrete pipe pile with snap-fit ​​connection according to claim 1, characterized in that: Steel plate anchor bars are fixed on the axial end face of the steel end plate, and these steel plate anchor bars are anchored inside the concrete tubular structure of the upper and lower pipe piles.

3. The novel prestressed high-strength concrete pipe pile with snap-fit ​​connection according to claim 1, characterized in that: The socket unit includes a T-shaped insert and a T-shaped slot; the T-shaped insert is circumferentially and evenly fixed on the bottom surface of the upper section of the pipe pile steel end plate; the T-shaped slot is circumferentially and evenly opened on the top surface of the lower section of the pipe pile steel end plate.

4. A novel prestressed high-strength concrete pipe pile with snap-fit ​​connection according to claim 3, characterized in that: The arc length of the T-shaped slot is greater than the arc length of the T-shaped plug. One end of the T-shaped slot is provided with a socket to accommodate the axial displacement of the T-shaped plug, and the other end of the T-shaped slot is fixed with a limiting plate to axially limit the T-shaped plug.

5. A novel prestressed high-strength concrete pipe pile with snap-fit ​​connection according to claim 4, characterized in that: The upper section pipe pile connecting plate extends downward to the level of the lower section pipe pile connecting plate and is fixedly connected by bolts.

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