Concrete pipe pile with prestressed reinforcement anti-seismic buffer structure

Abstract

The invention relates to the technical field of pipe piles, in particular to a concrete pipe pile with a prestressed reinforcement anti-seismic buffer structure, which comprises a concrete pile body, a reinforcement cage formed in the concrete pile body and end plates arranged at two ends of the concrete pile body, a buffer medium is filled between the elastic bag and the outer side wall of the concrete pipe pile; a plurality of impedance hoops are sleeved and hooped on the outer side wall of the circumference of the elastic bag in an axial sliding mode, every two adjacent impedance hoops form a group, a protruding ring is arranged at the position, opposite to the position between the two impedance hoops in the same group, of the outer side wall of the concrete pile body, and an elastic jacking piece is arranged between every two adjacent impedance hoops in every two adjacent groups. The method has the advantage that the service life of the concrete pipe pile is prolonged.

Description

Technical Field

[0001] This application relates to the field of pipe pile technology, and in particular to a concrete pipe pile with a prestressed steel reinforcement seismic buffer structure. Background Technology

[0002] Prestressed concrete pipe piles are a type of concrete pipe pile manufactured using prestressing technology. During the manufacturing process, prestress is applied to the concrete by tensioning steel bars, causing the concrete to develop compressive stress before bearing any load. These prestressed concrete pipe piles possess high load-bearing capacity and good durability, and are widely used in construction, bridge, and road engineering projects.

[0003] However, in practical applications, the lateral or vertical vibrations generated by earthquakes are directly transmitted to the prestressed steel bars inside the pipe pile wall, causing the prestressed steel bars to be repeatedly subjected to instantaneous impact loads. Since the prestressed steel bars are rigidly connected to the pipe wall concrete, the vibration energy cannot be effectively dissipated, which can easily cause fatigue damage to the steel bars, such as local yielding and fracture. This leads to a decrease in the overall bearing capacity of the pipe pile and a shortened service life, indicating significant shortcomings. Summary of the Invention

[0004] To address the issue of short service life of concrete pipe piles, this application provides a concrete pipe pile with a prestressed steel reinforcement seismic buffer structure.

[0005] This application provides a concrete pipe pile with a prestressed steel seismic buffer structure, which adopts the following technical solution: A concrete pipe pile with a prestressed steel reinforcement seismic buffer structure includes a concrete pile body, a steel cage formed in the concrete pile body, and end plates arranged at both ends of the concrete pile body. An elastic bladder is sleeved on the outer wall of the concrete pipe pile, and a buffer medium is filled between the elastic bladder and the outer wall of the concrete pipe pile.

[0006] By adopting the above technical solution, when an earthquake occurs, the vibration is transmitted from the soil layer laterally or longitudinally to the elastic bladder outside the concrete pile. Because the elastic bladder is flexible and there is a buffer medium between the elastic bladder and the concrete pile, the elastic bladder deforms under the action of vibration, and the buffer medium also flows accordingly. In this way, the elastic bladder and the buffer medium work together to buffer the vibration, weaken the vibration intensity transmitted to the concrete pile, reduce the possibility of damage to the concrete pipe pile, and extend its service life.

[0007] Optionally, the elastic bladder is axially slidably fitted with multiple impedance hoops on its outer circumferential wall, with two adjacent impedance hoops forming a group and a convex ring arranged on the outer wall of the concrete pile relative to the position between the two impedance hoops in the same group, and an elastic top support is arranged between two adjacent groups and between two adjacent impedance hoops.

[0008] By adopting the above technical solution, when the elastic bladder is subjected to lateral or vertical vibration, the buffer medium will be compressed. In this way, the buffer medium can push the impedance hoop to move outside the elastic bladder, and the two adjacent sets of impedance hoop will compress the corresponding elastic support members, which can further weaken the vibration effect.

[0009] Optionally, the elastic support includes a sleeve and an inner rod that is inserted into the sleeve. The sleeve is arranged on an impedance clamp, while the inner rod is hinged to another impedance clamp. The inner rod has a step and is fitted with a support spring. One end of the support spring supports the step, and the other end supports the inner end face of the sleeve.

[0010] By adopting the above technical solution, when the impedance clamp moves outside the elastic bladder, the inner insertion rod will gradually insert into the sleeve, and the step on the inner insertion rod, together with the inner end face of the sleeve, will compress the top support spring, thereby reducing the vibration.

[0011] Optionally, the sleeve has an opening on the side facing away from the axis of the concrete pile and is hinged to an installation side plate, which is detachably connected to the inner sleeve at a position away from the hinge.

[0012] By adopting the above technical solution, after the impedance clamp is installed outside the elastic bladder, the worker puts the top support spring on the inner insert rod and squeezes it. Then, the inner insert rod is rotated so that both the inner insert rod and the top support spring are turned into the sleeve. Then, the installation side plate is rotated to close the open side of the sleeve. Finally, the installation side plate and the sleeve are fastened together, which facilitates the installation of the elastic top support.

[0013] Optionally, an injection pipe formed in the concrete pile body is arranged between the two end plates. One end of the injection pipe is closed and the other end is provided with a one-way valve. An injection hole is opened on the injection pipe at a position relative to the two impedance hoops in the same group.

[0014] By adopting the above technical solution, the elastic bladder and the concrete pipe pile body are not filled with buffer medium before the concrete pipe pile is driven into the ground. After it has been driven deep into the soil, the buffer medium is injected between the elastic bladder and the concrete pipe pile body through the injection pipe and injection hole to prevent the bulging elastic bladder from being torn by sharp stones in the soil layer during the process of entering the deep soil layer.

[0015] Optionally, the buffer medium is concentrated saline solution.

[0016] By adopting the above technical solution, the freezing temperature of concentrated brine is relatively low. Therefore, when used in cold regions, it can still maintain strong vibration damping performance and further extend the service life of concrete pipe piles.

[0017] Optionally, some of the impedance rings are provided with arc-shaped deflectors, which are arranged at an angle to the direction of pile driving away from the concrete pile body.

[0018] By adopting the above technical solution, the arc deflector protects the elastic bladder. During the process of driving the concrete pipe pile into the ground, the arc deflector blocks the front of the elastic bladder and opens up space for the elastic bladder to descend, reducing the possibility of damage to the elastic bladder.

[0019] Optionally, both the impedance clamp and the elastic bladder are coated with polytetrafluoroethylene.

[0020] By adopting the above technical solution, polytetrafluoroethylene (PTFE) has a low coefficient of friction, allowing concrete pipe piles to be driven into the ground more smoothly. In addition, PTFE has strong wear resistance, providing excellent protection for the elastic bladder.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. When an earthquake occurs, the vibration is transmitted from the soil layer laterally or longitudinally to the elastic bladder outside the concrete pile. Because the elastic bladder is flexible and there is a buffer medium between the elastic bladder and the concrete pile, the elastic bladder deforms under the action of vibration, and the buffer medium also flows accordingly. In this way, the elastic bladder and the buffer medium work together to buffer the vibration, weaken the vibration intensity transmitted to the concrete pile, reduce the possibility of damage to the concrete pipe pile, and extend its service life. 2. When the elastic bladder is subjected to lateral or vertical vibration, the buffer medium will be compressed. This buffer medium can push the impedance hoop to move outside the elastic bladder, and the two adjacent sets of impedance hoop will compress the corresponding elastic support members, which can further weaken the vibration. 3. After the resistance clamp is installed outside the elastic bladder, the worker puts the top support spring on the inner insert rod and squeezes it. Then, the inner insert rod is rotated so that both the inner insert rod and the top support spring are turned into the sleeve. Then, the installation side plate is rotated to close the open side of the sleeve. Finally, the installation side plate and the sleeve are fastened together, which facilitates the installation of the elastic top support. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0023] Figure 2 This is a cross-sectional view showing the positional relationship between the concrete pile, end plate, and elastic bladder in an embodiment of this application.

[0024] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0025] Explanation of reference numerals in the attached drawings: 1. Concrete pile; 3. End plate; 4. Elastic bladder; 5. Buffer medium; 6. Impedance hoop; 7. Convex ring; 8. Elastic top support; 81. Sleeve; 82. Inner rod; 83. Top support compression spring; 84. Step; 85. Mounting side plate; 9. Injection pipe; 91. Injection hole; 10. One-way valve; 11. Arc detonator; 12. Ring clamp. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0027] This application discloses a concrete pipe pile with a prestressed steel reinforcement seismic buffer structure.

[0028] Reference Figure 1 The concrete pipe pile with prestressed steel reinforcement seismic buffer structure includes a concrete pile body 1, a steel cage (not shown in the figure) formed in the concrete pile body 1, and end plates 3 connected to the steel cage and arranged at both ends of the concrete pile body 1.

[0029] Reference Figure 1 An elastic bladder 4 is fitted on the outer wall of the concrete pile 1, and a ring clamp 12 is also bolted to the side of the end plate 3 facing away from the concrete pile 1. The end of the elastic bladder 4 is clamped between the end plate 3 and the ring clamp 12.

[0030] Reference Figure 1 and Figure 2 The elastic bladder 4 is axially slidably sleeved on the outer circumferential wall and is fitted with multiple impedance hoops 6. The position of the elastic bladder 4 relative to the impedance hoops 6 is in close contact with the outer wall of the concrete pile 1.

[0031] Two adjacent impedance hoops 6 form a group. A raised ring 7 is integrally formed on the outer wall of the concrete pile 1 relative to the position between the two impedance hoops 6 in the same group. The cavity enclosed by the concrete pile 1, the elastic bladder 4, and the two raised rings 7 in the same group is filled with a buffer medium 5. In this application, the buffer medium 5 is concentrated salt water.

[0032] Reference Figure 1 and Figure 2 A material injection pipe 9, formed inside the concrete pile body 1, is fixedly inserted between the two end plates 3. One end of the material injection pipe 9 is closed and the other end is threadedly connected to a one-way valve 10. A material injection hole 91 is opened on the material injection pipe 9 at a position relative to the two impedance clamps 6 in the same group. The material injection hole 91 communicates with the cavity mentioned above.

[0033] Reference Figure 2 After the concrete pipe pile is driven into the ground, the one-way valve 10 is connected to the material supply device in the prior art, so that the injection pipe 9 and the injection hole 91 work together to send the buffer medium 5 into each cavity.

[0034] Reference Figure 2When an earthquake occurs, the lateral and longitudinal vibrations are transmitted through the soil layer to the elastic bladder 4. Since the elastic bladder 4 is flexible, the vibration acts on the elastic bladder 4, causing the elastic bladder 4 to deform under the force, while the buffer medium 5 is subjected to force and flows. In this way, the elastic bladder 4 and the buffer medium 5 work together to weaken the vibration intensity transmitted to the concrete pile 1 and extend its service life.

[0035] Reference Figure 2 and Figure 3 An elastic support member 8 is arranged between two adjacent groups and two adjacent impedance clamps 6. The elastic support member 8 includes a sleeve 81 and an inner rod 82 that is inserted into the sleeve 81. The sleeve 81 is welded to one impedance clamp 6, while the inner rod 82 is hinged to another impedance clamp 6. A step 84 is reserved on the inner rod 82 and a top support spring 83 is sleeved on it. One end of the top support spring 83 supports the step 84, and the other end supports the inner end face of the sleeve 81.

[0036] Reference Figure 2 and Figure 3 The sleeve 81 has an opening on the side facing away from the axis of the concrete pile 1 and is hinged to an installation side plate 85. The installation side plate 85 is bolted to the inner sleeve 81 at a position away from the hinge.

[0037] During installation, the worker manually places the top support spring 83 onto the inner insert rod 82 and rotates it so that both the top support spring 83 and the inner insert rod 82 are inserted into the sleeve 81. Then, the installation side plate 85 is rotated to close and tighten the open side of the sleeve 81.

[0038] Reference Figure 2 and Figure 3 When the elastic bladder 4 is deformed by force, the buffer medium 5 inside it will push the two corresponding impedance rings 6 away from each other, so that the two adjacent sets of impedance rings 6 that are close to each other will move closer to each other. In this way, the inner rod 82 will gradually be inserted into the sleeve 81, and the step 84 on the inner rod 82, together with the inner end face of the sleeve 81, will compress the top support spring 83, thereby further weakening the vibration.

[0039] Reference Figure 2 An arc-shaped baffle 11 is integrally formed on part of the impedance hoop 6. The arc-shaped baffle 11 is inclined and faces away from the driving direction of the concrete pile 1. During the process of the concrete pile 1 being driven into the ground, the arc-shaped baffle 11 is positioned in front of the elastic bladder 4, which protects the elastic bladder 4 and also creates space for the elastic bladder 4 to descend, reducing the possibility of damage to the elastic bladder 4.

[0040] Reference Figure 2 The impedance clamp 6, the arc pawl 11, and the elastic bladder 4 are all coated with polytetrafluoroethylene (PTFE). PTFE has strong wear resistance and can provide strong protection for each component.

[0041] The implementation principle of a concrete pipe pile with a prestressed steel reinforcement seismic buffer structure in this application embodiment is as follows: When an earthquake occurs, the lateral and longitudinal vibrations are transmitted to the elastic bladder 4 through the soil layer. Since the elastic bladder 4 is flexible, the vibration acts on the elastic bladder 4, causing the elastic bladder 4 to deform under force, while the buffer medium 5 is subjected to force and flows. In this way, the elastic bladder 4 and the buffer medium 5 work together to weaken the vibration intensity transmitted to the concrete pile body 1 and extend the service life.

[0042] Furthermore, when the elastic bladder 4 is deformed by force, the buffer medium 5 inside it will push the two corresponding impedance clamps 6 away from each other, so that the two adjacent sets of impedance clamps 6 that are close to each other will move closer to each other. In this way, the inner rod 82 will gradually be inserted into the sleeve 81, and the step 84 on the inner rod 82, together with the inner end face of the sleeve 81, will compress the top support spring 83, thereby further weakening the vibration.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A concrete pipe pile with a prestressed steel reinforcement seismic buffer structure, comprising a concrete pile body (1), a steel cage formed within the concrete pile body (1), and end plates (3) arranged at both ends of the concrete pile body (1), characterized in that: An elastic bladder (4) is fitted on the outer wall of the concrete pipe pile, and a buffer medium (5) is filled between the elastic bladder (4) and the outer wall of the concrete pipe pile.

2. The concrete pipe pile with prestressed steel reinforcement seismic buffer structure according to claim 1, characterized in that: The elastic bladder (4) is axially slidably fitted on the outer circumferential wall and is fitted with multiple impedance hoops (6). Two adjacent impedance hoops (6) form a group and a convex ring (7) is arranged on the outer wall of the concrete pile (1) relative to the position between the two impedance hoops (6) in the same group. An elastic top support (8) is arranged between two adjacent groups and between two adjacent impedance hoops (6).

3. The concrete pipe pile with prestressed steel reinforcement seismic buffer structure according to claim 2, characterized in that: The elastic support member (8) includes a sleeve (81) and an inner rod (82) that is inserted into the sleeve (81). The sleeve (81) is arranged on an impedance clamp (6), and the inner rod (82) is hinged to another impedance clamp (6). A step (84) is arranged on the inner rod (82) and a top support spring (83) is sleeved on it. One end of the top support spring (83) supports the step (84), and the other end supports the inner end face of the sleeve (81).

4. The concrete pipe pile with prestressed steel reinforcement seismic buffer structure according to claim 3, characterized in that: The sleeve (81) has an opening on the side facing away from the axis of the concrete pile (1) and is hinged to an installation side plate (85). The installation side plate (85) is detachably connected to the inner sleeve (81) at a position away from the hinge.

5. The concrete pipe pile with prestressed steel reinforcement seismic buffer structure according to claim 2, characterized in that: A material injection pipe (9) formed in the concrete pile body (1) is arranged between the two end plates (3). One end of the material injection pipe (9) is closed and the other end is provided with a one-way valve (10). A material injection hole (91) is opened on the material injection pipe (9) at a position relative to the two impedance hoops (6) in the same group.

6. The concrete pipe pile with prestressed steel reinforcement seismic buffer structure according to claim 1, characterized in that: The buffer medium (5) is concentrated saline.

7. The concrete pipe pile with prestressed steel reinforcement seismic buffer structure according to claim 2, characterized in that: An arc-shaped baffle (11) is arranged on a portion of the impedance hoop (6), and the arc-shaped baffle (11) is arranged at an angle away from the driving direction of the concrete pile body (1).

8. The concrete pipe pile with prestressed steel reinforcement seismic buffer structure according to claim 2, characterized in that: Both the impedance clamp (6) and the elastic bladder (4) are coated with polytetrafluoroethylene.

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