Large-diameter precast pile joint structure with damping function

Abstract

The invention belongs to the technical field of precast pile joints, and discloses a large-diameter precast pile joint structure with a damping function, which comprises a first tubular pile, a second tubular pile is arranged below the first tubular pile, the end parts of the first tubular pile and the second tubular pile are fixedly connected with end plates through bolts, and the side walls of the two end plates abut against each other. Through cooperation of structures such as split bolts, damping rubber layers and elastic rubber rings, the double-layer damping rubber layers fixedly connected to the split bolts are matched with guide rods inserted into the upper portion and the lower portion, the split bolts connecting the first pipe pile and the second pipe pile can extend up and down or be compressed by a certain distance, and the double-layer damping rubber layers can effectively disperse longitudinal shear stress; longitudinal shear stress can be effectively absorbed and dispersed, and the split plug pin can extrude the inner sliding sleeve and the elastic rubber ring in any direction of the periphery along with the first pipe pile and the second pipe pile, so that transverse shear force is resisted, and the using effect of the pipe piles under different geological conditions is enhanced.

Description

Technical Field

[0001] This invention belongs to the field of precast pile joint technology, specifically a large-diameter precast pile joint structure with shock absorption function. Background Technology

[0002] Large-diameter precast pile joints typically refer to specialized components used to connect precast piles with a diameter greater than 800 mm, such as PHC pipe piles and irregular square piles. They must meet the requirements of high bearing capacity, bending resistance, shear resistance, and seismic resistance, and solve the problems of axial alignment, force transmission continuity, and stability under earthquake or impact loads when splicing multiple pile sections.

[0003] A corrosion protection device for prestressed concrete pipe piles, disclosed in prior art document CN219298198U, includes a pile body, an anti-corrosion connection mechanism, and auxiliary components. The anti-corrosion connection mechanism includes a first joint seat and a second joint seat fixedly installed inside the pile body. A pin is fixedly installed at the bottom of the first joint seat, and telescopic rods are fixedly installed on both sides of the inner wall of the pile body. This corrosion protection device for prestressed concrete pipe piles, with its anti-corrosion connection mechanism, can connect the pipe piles and then seal the connection with a sealing hoop to prevent the pore structure from being exposed to the underground environment and corroding. The outer side of the pile body is equipped with an anti-corrosion coating and a wear-resistant layer, which can protect the pile body from corrosion and improve the practicality of the pipe pile. The auxiliary components can protect the pile body and effectively buffer and reduce shock when subjected to external forces, reducing the possibility of damage to the pipe pile and ensuring the safe use of the concrete pipe pile. Although the above application uses auxiliary components and springs to buffer and reduce vibration of the pipe pile, in actual applications, the shear stress on the pipe pile is in different directions, especially the transverse and longitudinal shear forces are large, which requires high shear resistance at the pile connection. Therefore, the buffering effect of a single component is limited, and it is necessary to optimize the joint structure to improve its shear resistance. Summary of the Invention

[0004] To address the problem mentioned in the background art that traditional methods relying on a single component have limited buffering effects, this invention provides a large-diameter precast pile joint structure with shock absorption function.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a large-diameter precast pile joint structure with shock absorption function, comprising a first pipe pile, a second pipe pile disposed below the first pipe pile, end plates being bolted to the ends of both the first and second pipe piles, the sidewalls of the two end plates abutting against each other, and further comprising: The split vibration damping mechanism is located on the end plate and has several parts arranged at equal intervals around the circumference. The easy-to-replace mechanism is connected to the split shock absorption mechanism, and the number of such mechanisms is the same as that of the split shock absorption mechanism. The split shock absorption mechanism extends through the two end plates into the second pipe pile, and the easy-to-replace mechanism locks and unlocks the split shock absorption mechanism. The split pin is inserted into the upper end plate from top to bottom, and then the two end plates are bolted to the first pipe pile and the second pipe pile respectively.

[0006] Preferably, the split shock absorption mechanism includes a split pin that abuts against the bottom of the first pipe pile. The split pin is divided into three parts: upper, middle and lower, and each part is fixed to the other by a limiting wedge with a shock-absorbing rubber layer.

[0007] Preferably, guide rods are fixedly connected to both the upper and lower ends of the split pin, and the ends of the guide rods are elastically connected to the upper and lower parts of the split pin, respectively.

[0008] Preferably, the outer wall of the split pin is slidably sleeved with an inner sliding sleeve, the outer wall of the inner sliding sleeve is fixedly connected with an elastic rubber ring, the outer wall of the elastic rubber ring is fixedly connected with an outer sleeve, and the outer wall of the outer sleeve is slidably engaged with the inner cavity of the end plate.

[0009] Preferably, the lower part of the split pin has an opening groove, and several trapezoidal toothed plates slide through the lower part of the split pin at equal intervals. When a vertical shear force occurs, the split pin moves up and down, sliding in the inner cavity of the split pin. Through the double-layer shock-absorbing rubber layer fixed in the middle, and in conjunction with the guide rods inserted into the upper and lower parts, the split pin connecting the first pipe pile and the second pipe pile can extend or compress a certain distance. The double-layer shock-absorbing rubber layer can effectively disperse the shear stress. When a horizontal shear force occurs, the split pin can follow the first pipe pile and the second pipe pile, squeezing the inner sliding sleeve and elastic rubber ring in any direction. This allows the split shock-absorbing mechanism to resist shear stress in different directions, enhancing the performance.

[0010] Preferably, the easy-to-replace mechanism includes a snap-fit ​​sleeve plate fixed to the inner cavity of the end of the second pipe pile. The inner cavity of the snap-fit ​​sleeve plate has a plurality of toothed grooves, the size of which is adapted to the trapezoidal snap-fit ​​tooth plate.

[0011] Preferably, the outer wall of the snap-fit ​​sleeve is fixedly connected to an mounting plate, and a threaded rod is rotatably connected to the middle of the mounting plate.

[0012] Preferably, a handle is fixedly connected to the end of the threaded rod, and a threaded sleeve is threadedly connected to the outer wall of the threaded rod, and an arc-edged push block is threadedly connected to the outer wall of the threaded sleeve.

[0013] Preferably, the outer wall of the arc-edge push block is slidably engaged in the opening groove, and the arc-edge end of the arc-edge push block abuts against the trapezoidal toothed plate. Workers can remove and replace the split pin and parts at any time on site to facilitate equipment maintenance. By rotating the threaded rod in the opposite direction, the threaded sleeve and the arc-edge push block are retracted synchronously until the threaded rod abuts against the inner cavity of the threaded sleeve. Continuing to rotate can drive the arc-edge push block to retract further through the threaded sleeve until the end of the arc-edge push block slides out of the split pin, releasing the restriction on the split pin.

[0014] Preferably, the second pipe pile end edge is provided with several side grooves, and the mounting plate is located in the side grooves. During installation, from bottom to top, the inner sliding sleeve, elastic rubber ring and outer sleeve are fitted into the gap between the outer wall and end plate of the split pin, the first pipe pile and the second pipe pile are aligned, the lower part of the split pin passes through the lower end plate and enters the inner cavity of the snap-fit ​​sleeve plate. When the split pin descends, the trapezoidal snap-fit ​​plate is squeezed and retracted into the opening groove. At this time, the worker rotates the threaded rod to move the threaded sleeve outward. Then, through the threaded compression of the outer wall of the threaded sleeve, the arc-edge push block moves outward and slides along the axial direction of the opening groove of the outer sleeve until the end of the arc-edge push block abuts against the trapezoidal snap-fit ​​plate, squeezing and pushing the trapezoidal snap-fit ​​plate outward. Finally, the trapezoidal snap-fit ​​plate is snapped into the tooth groove of the snap-fit ​​sleeve plate, completing the snap-fit ​​between the split pin and the arc-edge push block.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention enhances resistance to both lateral and longitudinal shear forces by incorporating a combination of a split pin, a shock-absorbing rubber layer, and an elastic rubber ring. The double-layered shock-absorbing rubber layer fixed to the split pin, along with guide rods inserted into the upper and lower parts, allows the split pin connecting the first and second pipe piles to extend or compress vertically. The double-layered shock-absorbing rubber layer effectively disperses longitudinal shear stress, absorbing and dispersing it, and preventing structural damage caused by stress concentration, thus significantly extending the service life of the pipe piles. Furthermore, the split pin can follow the first and second pipe piles, compressing the inner sliding sleeve and elastic rubber ring in any direction. The compressive strain of the elastic rubber ring disperses stress, resisting lateral shear forces. This ensures that lateral stress is effectively dispersed and alleviated regardless of its direction, greatly enhancing the performance of the pipe piles under various geological conditions.

[0016] This invention, through the combination of a trapezoidal locking plate and an arc-edge push block, facilitates the locking and unlocking of the split pin at any time, supporting on-site replacement of connecting components. By rotating the threaded rod in the opposite direction, the threaded sleeve and the arc-edge push block retract synchronously until the threaded rod abuts against the inner cavity of the threaded sleeve. Continuing to rotate the threaded rod causes the arc-edge push block to retract further through the threaded sleeve until the end of the arc-edge push block slides out of the split pin, releasing the restriction on the split pin. When the split pin moves upward, the trapezoidal locking plate can be easily squeezed and retracted into the opening slot, thereby achieving rapid removal of the split pin, effectively saving maintenance time, reducing maintenance costs, and improving the maintainability and flexibility of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front section structure of the present invention; Figure 2 For the present invention Figure 1 A magnified schematic diagram of the structure at point A in the middle; Figure 3 This is a schematic diagram showing the structural fit between the shock-absorbing adhesive layer and the split pin of the present invention; Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at point B in the middle; Figure 5 This is a schematic diagram showing the structural fit between the mounting plate and the threaded rod of the present invention; Figure 6 This is a schematic diagram showing the structural fit between the split pin and the end plate of the present invention; Figure 7 This is a schematic diagram showing the structural fit between the elastic rubber ring and the outer sleeve of the present invention; Figure 8 This is a schematic diagram showing the structural fit between the arc-edge push block and the snap-fit ​​sleeve plate of the present invention; Figure 9 This is a schematic diagram showing the mating relationship between the arc-edge push block and the split pin structure of the present invention; Figure 10 This is a schematic diagram showing the structural fit between the trapezoidal toothed plate and the arc-edge push block of the present invention.

[0018] In the picture: 1. First pipe pile; 2. Second pipe pile; 3. End plate; 4. Split damping mechanism; 401. Split pin; 402. Damping rubber layer; 403. Elastic rubber ring; 404. Inner sliding sleeve; 405. Outer sleeve; 406. Trapezoidal toothed plate; 407. Opening groove; 408. Guide rod; 409. Limiting wedge; 5. Easy-to-replace mechanism; 501. Snap-fit ​​sleeve plate; 502. Tooth groove; 503. Threaded sleeve; 504. Mounting plate; 505. Threaded rod; 506. Arc-edge push block; 507. Side groove. Detailed Implementation

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figures 1 to 10 As shown, the present invention provides a large-diameter precast pile joint structure with shock absorption function, including a first pipe pile 1, a second pipe pile 2 disposed below the first pipe pile 1, and end plates 3 fixed to the ends of both the first pipe pile 1 and the second pipe pile 2 by bolts, with the side walls of the two end plates 3 abutting against each other, and further including: Split vibration damping mechanism 4, the split vibration damping mechanism 4 is located on end plate 3, and several are arranged at equal intervals around the circumference; Easy-to-replace mechanism 5 is connected to split shock absorber mechanism 4, and the number of them is the same as that of split shock absorber mechanism 4. Among them, the split shock absorption mechanism 4 passes through the two end plates 3 and extends into the second pipe pile 2, and the disassembly and replacement mechanism 5 locks and unlocks the split shock absorption mechanism 4.

[0021] Using the above method: the split pin 401 is precisely inserted into the upper end plate 3 from top to bottom, ensuring a smooth and complete insertion process. Subsequently, the two end plates 3 are bolted to the first pipe pile 1 and the second pipe pile 2 respectively. This connection method is firm and reliable, laying the foundation for the overall structural stability.

[0022] like Figure 3 As shown, the split damping mechanism 4 includes a split pin 401 that abuts against the bottom of the first pipe pile 1. The split pin 401 is divided into three parts: upper, middle and lower, and each part is fixed to the other by a damping rubber layer 402 through a limiting wedge 409. Guide rods 408 are fixed to the upper and lower ends of the middle part of the split pin 401, and the ends of the guide rods 408 are elastically connected to the upper and lower parts of the split pin 401, respectively.

[0023] like Figure 4 , Figures 6 to 10 As shown, the outer wall of the split pin 401 is slidably sleeved with an inner sliding sleeve 404, the outer wall of the inner sliding sleeve 404 is fixedly connected with an elastic rubber ring 403, the outer wall of the elastic rubber ring 403 is fixedly connected with an outer sleeve 405, and the outer wall of the outer sleeve 405 is slidably engaged with the inner cavity of the end plate 3; the lower part of the split pin 401 is provided with an opening groove 407, and the lower part of the split pin 401 is also equidistantly slidably perforated with a number of trapezoidal toothed plates 406.

[0024] Using the above-mentioned scheme, after the connected first pipe pile 1 and second pipe pile 2 are put into underground use, the structure exhibits excellent shear resistance and vibration damping performance. When vertical shear force occurs, the split pin 401 can move flexibly up and down within its inner cavity. The double-layer damping rubber layer 402 fixed in the middle plays a key role, acting as a highly efficient buffer. Together with the guide rods 408 inserted into the upper and lower parts of the split pin 401, it allows the split pin 401 connecting the first pipe pile 1 and the second pipe pile 2 to extend or compress vertically for a certain distance. This design not only effectively absorbs and disperses vertical shear stress but also avoids structural damage caused by stress concentration, greatly extending the service life of the pipe piles. When horizontal shear force occurs, the split pin 401 can follow the first pipe pile 1 and the second pipe pile 2 to press the inner sliding sleeve 404 and the elastic rubber ring 403 in any direction. The inner sliding sleeve 404 and the elastic rubber ring 403 have good elasticity and deformation capacity, and can deform under compression, thereby effectively buffering the horizontal shear force. This unique design enables the split damping mechanism 4 to resist shear stress in different directions. No matter where the stress comes from, it can be effectively dispersed and relieved, greatly enhancing the performance of the pipe pile under different geological conditions.

[0025] like Figures 4 to 6 As shown, the easy-to-replace mechanism 5 includes a snap-fit ​​sleeve 501 fixed to the inner cavity of the end of the second pipe pile 2. The inner cavity of the snap-fit ​​sleeve 501 is provided with a plurality of toothed grooves 502. The size of the toothed grooves 502 is adapted to the trapezoidal snap-fit ​​tooth plate 406. An installation plate 504 is fixed to the outer wall of the snap-fit ​​sleeve 501. A threaded rod 505 is rotatably connected to the middle of the installation plate 504.

[0026] like Figure 4 , Figure 9 and Figure 10 As shown, a handle is fixed to the end of the threaded rod 505, and a threaded sleeve 503 is threadedly connected to the outer wall of the threaded rod 505. An arc-edged push block 506 is threadedly connected to the outer wall of the threaded sleeve 503. The outer wall of the arc-edged push block 506 is slidably engaged in the opening groove 407, and the arc-edged end of the arc-edged push block 506 abuts against the trapezoidal toothed plate 406. Several side grooves 507 are opened at the edge of the end of the second pipe pile 2, and the mounting plate 504 is located in the side grooves 507.

[0027] Using the above method: The operator rotates the threaded rod 505, and through the threaded transmission principle, smoothly moves the threaded sleeve 503 outwards. As the threaded sleeve 503 moves, the threads on its outer wall press against the arc-edged push block 506, causing the arc-edged push block 506 to move precisely outwards and slide axially along the outer sleeve opening groove 407. This continues until the end of the arc-edged push block 506 tightly abuts against the trapezoidal toothed plate 406, forcefully pushing the trapezoidal toothed plate 406 outwards, ultimately securing the trapezoidal toothed plate 406 firmly onto the toothed groove 502 of the locking sleeve plate 501, completing the stable engagement of the split pin 401 and the arc-edged push block 506. The entire installation process is rigorous and orderly, ensuring the stability and reliability of the structure. During disassembly, by rotating the threaded rod 505 in the opposite direction, the threaded sleeve 503 and the arc-edged push block 506 are retracted synchronously until the threaded rod 505 abuts against the inner cavity of the threaded sleeve 503. Continue rotating the threaded rod 505, which will cause the arc-edged push block 506 to retract further through the threaded sleeve 503 until the end of the arc-edged push block 506 slides out of the split pin 401, releasing the restriction on the split pin 401. At this time, the end of the trapezoidal toothed plate 406 has no contact. When the split pin 401 moves upward, the trapezoidal toothed plate 406 can be easily squeezed and retracted into the opening slot 407, thereby achieving the quick removal of the split pin 401.

[0028] Working principle and usage process of this invention: First, insert the split pin 401 into the upper end plate 3 from top to bottom. Then, bolt the two end plates 3 to the first pipe pile 1 and the second pipe pile 2 respectively. Next, from bottom to top, fit the inner sliding sleeve 404, the elastic rubber ring 403, and the outer connecting sleeve 405 into the gap between the outer wall of the split pin 401 and the end plate 3. Then, using an external docking device, align the first pipe pile 1 and the second pipe pile 2 so that the split pin 401 and the outer inner sliding sleeve 404, elastic rubber ring 403, and outer connecting sleeve 405 are simultaneously inserted into the lower end plate 3. At this time, the lower part of the split pin 401 passes through the lower end plate 3 and enters the inner cavity of the snap-fit ​​sleeve 501. Since the trapezoidal snap-fit ​​plate 406 has trapezoidal inclined sides on both sides, when the split pin 401 descends, the trapezoidal snap-fit ​​plate 406 is squeezed and retracted into the opening groove 407. At this time, the worker rotates the threaded rod 505, moves the threaded sleeve 503 outward, and then, through the threaded extrusion of the outer wall of the threaded sleeve 503, moves the arc-edge push block 506 outward and slides axially along the opening groove 407 of the outer sleeve until the end of the arc-edge push block 506 abuts against the trapezoidal toothed plate 406, pushing the trapezoidal toothed plate 406 outward, and finally making the trapezoidal toothed plate 406 snap into the tooth groove 502 of the snap-fit ​​sleeve 501, completing the snap-fit ​​between the split pin 401 and the arc-edge push block 506, and the installation is completed. Secondly, the connected first pipe pile 1 and second pipe pile 2 are driven underground for use. When vertical shear force occurs, the split pin 401 moves up and down, sliding within its inner cavity. Through the double-layer shock-absorbing rubber layer 402 fixed in the middle, and in conjunction with the guide rods 408 inserted into the upper and lower parts, the split pin 401 connecting the first pipe pile 1 and the second pipe pile 2 can extend or compress a certain distance, and the double-layer shock-absorbing rubber layer 402 can effectively disperse shear stress. When horizontal shear force occurs, the split pin 401 can follow the first pipe pile 1 and the second pipe pile 2, pressing the inner sliding sleeve 404 and the elastic rubber ring 403 in any direction, thereby enabling the split shock-absorbing mechanism 4 to resist shear stress in different directions and enhance its performance. Finally, staff can remove and replace the split pin 401 and other parts on-site at any time to facilitate equipment maintenance. Specifically, by rotating the threaded rod 505 in the reverse direction, the threaded sleeve 503 and the arc-edged push block 506 are retracted synchronously until the threaded rod 505 abuts against the inner cavity of the threaded sleeve 503. Continuing to rotate can drive the arc-edged push block 506 to retract further through the threaded sleeve 503 until the end of the arc-edged push block 506 slides out of the split pin 401, releasing the restriction on the split pin 401. At this time, the end of the trapezoidal toothed plate 406 has no contact, so when the split pin 401 moves upward, it can squeeze the trapezoidal toothed plate 406 and retract it into the opening slot 407.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 process, method, article, or apparatus.

[0030] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A large-diameter precast pile joint structure with shock absorption function, comprising a first pipe pile (1), a second pipe pile (2) disposed below the first pipe pile (1), and end plates (3) fixed to the ends of the first pipe pile (1) and the second pipe pile (2) by bolts, wherein the side walls of the two end plates (3) abut against each other, characterized in that: Also includes: Split shock absorption mechanism (4), the split shock absorption mechanism (4) is located on end plate (3), and several are arranged at equal intervals around the circumference; Easy-to-replace mechanism (5), which is connected to the split shock absorption mechanism (4) and the number of such mechanisms is the same as that of the split shock absorption mechanism (4); The split shock absorption mechanism (4) extends the two end plates (3) through and into the second pipe pile (2), and the easy-to-replace mechanism (5) locks and unlocks the split shock absorption mechanism (4).

2. The large-diameter precast pile joint structure with vibration damping function according to claim 1, characterized in that: The split shock absorption mechanism (4) includes a split pin (401) that abuts against the bottom of the first pipe pile (1). The split pin (401) is divided into three parts: upper, middle and lower, and each part is fixed to the other by a limiting wedge (409) with a shock-absorbing rubber layer (402).

3. The large-diameter precast pile joint structure with vibration damping function according to claim 2, characterized in that: The split pin (401) has guide rods (408) fixedly connected to both the upper and lower ends of the middle part, and the ends of the guide rods (408) are elastically connected to the upper and lower parts of the split pin (401) respectively.

4. The large-diameter precast pile joint structure with vibration damping function according to claim 3, characterized in that: The outer wall of the split pin (401) is slidably sleeved with an inner sliding sleeve (404), the outer wall of the inner sliding sleeve (404) is fixedly connected with an elastic rubber ring (403), the outer wall of the elastic rubber ring (403) is fixedly connected with an outer sleeve (405), and the outer wall of the outer sleeve (405) is slidably snapped into the inner cavity of the end plate (3).

5. The large-diameter precast pile joint structure with vibration damping function according to claim 4, characterized in that: The split pin (401) has an opening groove (407) at its lower part, and a number of trapezoidal toothed plates (406) slide through the lower part of the split pin (401) at equal intervals.

6. The large-diameter precast pile joint structure with vibration damping function according to claim 5, characterized in that: The easy-to-replace mechanism (5) includes a snap-fit ​​sleeve (501) fixed to the inner cavity of the end of the second pipe pile (2). The inner cavity of the snap-fit ​​sleeve (501) is provided with a number of tooth grooves (502). The size of the tooth grooves (502) is adapted to the trapezoidal snap-fit ​​tooth plate (406).

7. The large-diameter precast pile joint structure with vibration damping function according to claim 6, characterized in that: The outer wall of the snap-fit ​​sleeve (501) is fixedly connected to an mounting plate (504), and a threaded rod (505) is rotatably connected to the middle of the mounting plate (504).

8. The large-diameter precast pile joint structure with vibration damping function according to claim 7, characterized in that: The end of the threaded rod (505) is fixed with a handle, and the outer wall of the threaded rod (505) is threaded with a threaded sleeve (503), and the outer wall of the threaded sleeve (503) is threaded with an arc-edge push block (506).

9. The large-diameter precast pile joint structure with vibration damping function according to claim 8, characterized in that: The outer wall of the arc-edge push block (506) is slidably engaged in the opening groove (407), and the arc-edge end of the arc-edge push block (506) abuts against the trapezoidal toothed plate (406).

10. The large-diameter precast pile joint structure with vibration damping function according to claim 9, characterized in that: The second pipe pile (2) has several side grooves (507) at its end edge, and the mounting plate (504) is located in the side grooves (507).

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