Concrete pipe pile center plugging structure

Abstract

The utility model discloses a concrete pipe pile center plugging structure which comprises a pipe pile body inserted in the ground, a bearing and positioning structure is arranged in the pipe pile body, a steel cage is inserted on the bearing and positioning structure, cement is poured between the steel cage and a pipe pile and located above the bearing and positioning structure, and the cement is filled with cement. The center plugging structure of the concrete pipe pile relates to the technical field of building construction, is reasonable in structure and convenient to install, can enable the air bag to expand through inflation to achieve interference fit with the inner wall of the pipe pile after the steel cage is inserted and positioned, effectively plugs a pile core channel, prevents materials such as cement paste from infiltrating, and improves the construction efficiency. The pile body compactness and the pile forming quality are improved; controllable inflation is achieved through the one-way valve and the air pipe system, construction operation and later adjustment are facilitated, good sealing performance, reliability and adaptability are achieved, the engineering construction efficiency and the quality control level are remarkably improved, and the problems of exposure and eccentricity of the reinforcement cage are solved through the positioning pin.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a central sealing structure for concrete pipe piles. Background Technology

[0002] In the current pipe pile construction, after the pipe pile is positioned, a steel cage is installed in the central hole of the pipe pile. However, according to the design requirements, the steel cage is only inserted into the upper 2m depth of the central hole of the pipe pile, and its bottom end does not have the positioning and clamping function. The current solution is to clamp it with a metal rod at the pipe pile opening, but its bottom end still has an opening that cannot support the concrete. Therefore, waste is stuffed into the bottom end of the steel cage to block the concrete.

[0003] If the operation is not standardized, there will still be a problem of concrete mortar leakage due to the gap between the outer wall of the steel cage and the inner wall of the pipe pile. The sealing effect will also be poor, and the bottom end of the steel cage will be exposed.

[0004] In addition, the steel reinforcement cage is not supported inside the pipe pile, which leads to the problem of the steel reinforcement cage being eccentric. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a central sealing structure for concrete pipe piles, which solves the problems of exposed and eccentric reinforcing cages in existing systems.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a concrete pipe pile center sealing structure, comprising a pipe pile body inserted into the ground, a supporting and positioning structure provided in the pipe pile body, a steel cage inserted on the supporting and positioning structure, cement filling being poured between the steel cage and the pipe pile and above the supporting and positioning structure, and the top of the steel cage being higher than the upper end of the pipe pile body.

[0007] Preferably, the supporting and positioning structure includes a lower base plate, which is placed inside the pipe pile body. A cylinder is provided on the lower base plate, and an upper base plate is provided on the cylinder. An opening is provided at the center of the upper base plate, which is connected to the inner cavity of the cylinder. A one-way valve is installed in the opening, and an air inlet pipe is inserted on the one-way valve. An air outlet pipe is inserted below the one-way valve. An annular airbag is provided between the upper base plate and the lower base plate and on the outer ring surface of the cylinder. The air outlet pipe is connected to the airbag. A positioning pin is provided at the center of the upper base plate, and the air inlet pipe passes through the positioning pin.

[0008] Preferably, the positioning pin is wedge-shaped with its small end facing upwards.

[0009] Preferably, both the air inlet pipe and the air outlet pipe are PVC pipes. The top of the air outlet pipe is provided with a single air inlet end that is connected to the one-way valve, and the bottom of the air outlet pipe is provided with a plurality of air outlet ends that are respectively connected to the inner cavity of the airbag.

[0010] Preferably, the airbag is made of neoprene rubber, and the outer wall of the airbag is provided with anti-slip texture, which is an array of annular protrusions or granular protrusions.

[0011] Preferably, when the airbag is in an uninflated state, the inner diameter of the pipe pile body is larger than the diameter of the upper base plate and the lower base plate, and the diameter of the upper base plate and the lower base plate is larger than the outer diameter of the airbag. When the airbag is in an inflated state, the outer diameter of the airbag is larger than the inner diameter of the pipe pile to achieve an interference fit. Beneficial effects

[0012] This utility model provides a center-sealing structure for concrete pipe piles. It offers the following advantages: The structure is rationally designed and easy to install. After the steel cage is inserted and positioned, inflation allows the air bladder to expand and achieve an interference fit with the inner wall of the pipe pile, effectively sealing the pile core channel, preventing the seepage of cement slurry and other materials, and improving pile density and pile quality. Simultaneously, the air bladder is made of neoprene rubber with anti-slip texture, enhancing sealing stability and anti-slip capability. Controllable inflation is achieved through a one-way valve and air pipe system, facilitating construction and subsequent adjustments. It possesses excellent sealing performance, reliability, and adaptability, significantly improving construction efficiency and quality control. Furthermore, the positioning pin solves the problems of exposed and eccentric steel cages, making it convenient for users. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the inflated state of the support and positioning structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the support and positioning structure of this utility model in its uninflated state.

[0016] In the diagram: 1. Pipe pile body; 2. Steel cage; 3. Cement filling; 4. Lower base plate; 5. Cylinder; 6. Upper base plate; 7. One-way valve; 8. Air inlet pipe; 9. Air outlet pipe; 10. Positioning pin; 11. Airbag; 12. Anti-slip texture. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0019] Please see Figure 1-3 This utility model provides a technical solution: a center sealing structure for concrete pipe piles, including a pipe pile body 1 inserted into the ground, a support and positioning structure provided inside the pipe pile body 1, a steel cage 2 inserted on the support and positioning structure, and a cement filling 3 poured between the steel cage 2 and the pipe pile and above the support and positioning structure, with the top of the steel cage 2 higher than the upper end of the pipe pile body 1.

[0020] Example 1: The supporting and positioning structure includes a lower base plate 4, which is placed inside the pipe pile body 1. A cylinder 5 is provided on the lower base plate 4, and an upper base plate 6 is provided on the cylinder 5. An opening is provided at the center of the upper base plate 6, which is connected to the inner cavity of the cylinder 5. A one-way valve 7 is installed in the opening, and an air inlet pipe 8 is inserted on the one-way valve 7. An air outlet pipe 9 is inserted below the one-way valve 7. An annular airbag is provided between the upper base plate 6 and the lower base plate 4 and on the outer ring surface of the cylinder 5. The air outlet pipe 9 is connected to the airbag. A positioning pin 10 is provided at the center of the upper base plate 6, and the air inlet pipe 8 passes through the positioning pin 10.

[0021] The positioning pin 10 is wedge-shaped with its small end facing upwards.

[0022] Specifically, in this embodiment, a supporting platform is formed by setting a sandwich structure of "lower base plate 4 - cylinder 5 - upper base plate 6" inside the pipe pile. A one-way valve 7 is installed in the opening of the upper base plate 6, along with gas flow pipes (inlet pipe 8 and outlet pipe 9), to drive the annular airbag outside the cylinder 5 to inflate, thereby creating a sealing effect. The positioning pin 10 serves as an auxiliary mechanism for inserting and positioning the steel cage 2, and also acts as a channel for the inlet pipe 8, resulting in a high degree of structural integration. The small end of the wedge-shaped structure faces upwards, which helps to automatically lock under vertical force, improving the reliability of positioning.

[0023] Further:

[0024] Automation Extension: A pressure sensor can be added to the air intake system to enable remote inflation and deflation control, adapting to unmanned construction conditions.

[0025] Improved sealing performance: If used for underwater pile foundation construction, O-rings or sealing gaskets can be added to the edges of the upper / lower base plate 4 to improve the impermeability after the airbag is sealed.

[0026] Adaptable to various pipe pile specifications: The upper and lower base plates 4 are designed as sliding or replaceable discs to adapt to different pipe pile diameters and usage scenarios.

[0027] Example 2: Both the air inlet pipe 8 and the air outlet pipe 9 are PVC pipes. The top of the air outlet pipe 9 is provided with a single air inlet end that is connected to the one-way valve 7. The bottom of the air outlet pipe 9 is provided with several air outlet ends that are connected to the inner cavity of the airbag respectively.

[0028] Specifically, this embodiment details the material selection and structural design of the air inlet pipe 8 and the air outlet pipe 9. Using PVC material can reduce costs and improve corrosion resistance. The top of the air outlet pipe 9 has a single air inlet to ensure controllable air intake direction; the bottom has multiple air outlets to achieve uniform gas distribution inside the airbag, improve the overall synchronous expansion efficiency of the airbag, and avoid local expansion that could cause airbag tilting or incomplete sealing.

[0029] Further:

[0030] Pipeline optimization: The exhaust pipe 9 can adopt a spiral arrangement structure to further optimize the airflow distribution path and improve the expansion response speed.

[0031] Intelligent monitoring: A pressure sensor module is added to the 9 outlet pipes to realize real-time monitoring of inflation status and link with the control system for automatic pressure adjustment.

[0032] Shock-resistant / impact-resistant design: A buffer chamber can be installed at the air outlet to reduce the impact force under high flow and rapid inflation, thereby improving system stability.

[0033] Multi-mode inflation: The piping system can be designed to switch between dry gas and wet gas (with water vapor) modes, improving environmental adaptability under specific engineering conditions.

[0034] Example 3: The airbag is made of neoprene rubber, and the outer wall of the airbag is provided with anti-slip texture, which is an array of annular protrusions or granular protrusions.

[0035] When the airbag is in an uninflated state, the inner diameter of the pipe pile body 1 is larger than the diameter of the upper base plate 6 and the lower base plate 4, and the diameter of the upper base plate 6 and the lower base plate 4 is larger than the outer diameter of the airbag. When the airbag is in an inflated state, the outer diameter of the airbag is larger than the inner diameter of the pipe pile to achieve an interference fit.

[0036] Specifically, this embodiment focuses on optimizing the airbag material and its external structure. Neoprene is used as the material, possessing excellent aging resistance, corrosion resistance, and elasticity, making it suitable for complex underground / humid environments. The surface anti-slip texture, such as an array of annular raised dots or granular protrusions, enhances the friction between the airbag and the inner wall of the pipe pile after expansion, effectively preventing structural slippage and improving sealing stability.

[0037] Further:

[0038] Upgraded anti-slip structure: An interlaced diamond-patterned structure can be used to improve the anti-slip performance in both the circumferential and axial directions.

[0039] Composite material design: It can use an inner layer of neoprene rubber and an outer layer of aramid fiber composite material to improve strength and puncture resistance.

[0040] Temperature control adaptation: If construction is carried out in cold regions, a heating wire can be installed inside the airbag cavity to prevent freezing and ensure expansion performance.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A concrete pipe pile center sealing structure, comprising a pipe pile body (1) inserted into the ground, characterized in that, The pipe pile body (1) is provided with a support and positioning structure, and a steel cage (2) is installed on the support and positioning structure. Cement filling (3) is poured between the steel cage (2) and the pipe pile and above the support and positioning structure. The top of the steel cage (2) is higher than the upper port of the pipe pile body (1).

2. The concrete pipe pile center sealing structure according to claim 1, characterized in that... The supporting and positioning structure includes a lower base plate (4), which is placed inside the pipe pile body (1). A cylinder (5) is provided on the lower base plate (4), and an upper base plate (6) is provided on the cylinder (5). An opening is provided at the center of the upper base plate (6), which is connected to the inner cavity of the cylinder (5). A one-way valve (7) is installed in the opening. An air inlet pipe (8) is installed on the one-way valve (7), and an air outlet pipe (9) is installed below the one-way valve (7). An annular airbag (11) is provided between the upper base plate (6) and the lower base plate (4) and on the outer ring surface of the cylinder (5). The air outlet pipe (9) is connected to the airbag (11). A positioning pin (10) is provided at the center of the upper base plate (6), and the air inlet pipe (8) passes through the positioning pin (10).

3. The concrete pipe pile center sealing structure according to claim 2, characterized in that... The positioning pin (10) is wedge-shaped with its small end facing upward.

4. The concrete pipe pile center sealing structure according to claim 2, characterized in that... Both the air inlet pipe (8) and the air outlet pipe (9) are PVC pipes. The top of the air outlet pipe (9) is provided with a single air inlet end that is connected to the one-way valve (7). The bottom of the air outlet pipe (9) is provided with several air outlet ends that are connected to the inner cavity of the airbag (11).

5. A concrete pipe pile center sealing structure according to claim 2, characterized in that... The airbag (11) is made of neoprene rubber, and the outer wall of the airbag (11) is provided with anti-slip texture (12), which is an array of annular protrusions or granular protrusions.

6. A concrete pipe pile center sealing structure according to claim 2, characterized in that... When the airbag (11) is in an uninflated state, the inner diameter of the pipe pile body (1) is greater than the diameter of the upper base plate (6) and the lower base plate (4), and the diameter of the upper base plate (6) and the lower base plate (4) is greater than the outer diameter of the airbag (11). When the airbag (11) is in an inflated state, the outer diameter of the airbag (11) is greater than the inner diameter of the pipe pile to achieve an interference fit.

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