Device and technical method for connecting underwater prefabricated pipe pile foundation and prefabricated pile column

Abstract

The invention relates to the technical field of prefabricated pipe pile connecting equipment, in particular to a device and a technical method for connecting an underwater prefabricated pipe pile foundation and a prefabricated pile column. The water-proof annular sealing sleeve is arranged and matched with the longitudinal bars, the stirrups and the poured concrete which are connected in the clamping cavity in a staggered mode, and a multi-protection structure is formed. Not only can the contact between water and an internal structure be effectively isolated, the corrosion speed be slowed down, the service life is prolonged, but also the strength and the stability of a connecting part can be enhanced, and stable work in an underwater complex environment is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated pipe pile connection equipment, in particular to a device and technical method for connecting an underwater prefabricated pipe pile foundation with a prefabricated pile column. Background Art

[0002] Pre-tensioned prestressed pipe piles are hollow, elongated concrete precast components manufactured using a pre-tensioning process and centrifugal forming. They primarily consist of a cylindrical pile body, end plates, and steel collars. Pile splicing involves connecting precast pipe piles one by one and continuing to sink them until the designed depth is reached, when the length of a single pile does not reach the specified design depth. This involves connecting the top of the previously driven pipe pile with the bottom of the next pile to extend the pile body. (For example, when the original ground elevation of abutment and pier foundations is insufficient to meet the design height requirements, splicing is necessary to ensure the total length of the pile foundation.) Currently, the main methods for splicing piles include welding, flange bolting, and sulfur mortar anchoring.

[0003] Patent CN220225280U discloses a prefabricated pipe pile connection structure. This structure utilizes a butt-welded steel plate and prestressed steel bars to provide mounting ends for two concrete pipe piles. A connecting assembly and a threaded cap secure the butt-welded steel plate, achieving stable butt connection of the piles. This structure enhances the connection strength by implanting steel bars. It also incorporates a connecting structure around the pile body and utilizes butt welding and hole welding to secure the two piles. This ensures strong connection stability and compressive strength, ensuring a stable connection and end position.

[0004] However, the aforementioned pipe pile joint structure fails to consider corrosion protection requirements. Pipe piles operate in diverse environments, including dry, humid, and underwater. In humid or underwater environments, exposed steel bars at the joints are susceptible to corrosion, shortening the pile life and requiring frequent maintenance or replacement, significantly increasing repair and maintenance costs. Therefore, corrosion protection at the joints is crucial to ensuring structural durability. Summary of the Invention

[0005] In order to avoid and overcome the technical problems existing in the prior art, the present invention provides a device and a technical method for connecting an underwater prefabricated pipe pile foundation with a prefabricated pile column. The present invention can effectively prevent the pipe pile connection from being corroded and extend its service life.

[0006] To achieve the above object, the present invention provides the following technical solutions: A device for connecting an underwater prefabricated pipe pile foundation with a prefabricated pile column comprises two connecting seats installed at the ends of two prefabricated pipe piles that are butted against each other and fixedly connected; the outer sides of the two connecting seats are provided with a water-proof annular sealing sleeve, a clamping cavity is formed between the annular sealing sleeve and the connecting seat, longitudinal bars and stirrups that are staggered and connected to each other are arranged in the clamping cavity, and concrete is also poured in the clamping cavity.

[0007] As a further solution of the present invention: the two end surfaces of the two connecting seats that are opposite to each other are each evenly provided with snap-in holes along their respective circumferential directions, and each snap-in hole is a stepped hole with a thick bottom and a thin mouth. A connecting rod is inserted into the two snap-in holes that are opposite to each other, and both ends of the connecting rod are stepped and can be tightened and inserted into the snap-in holes and then opened to clamp the snap-in holes, so as to fix the two connecting seats together.

[0008] As a further solution of the present invention: semi-cylindrical connecting rods are evenly arranged in sequence along their respective circumferential directions on the sides of the two connecting seats, and the axial directions of the connecting rods are perpendicular to the axes of the prefabricated pipe piles; the two corresponding connecting rods above and below are matched with each other to form a cylindrical reinforcement rod, and a sleeve is coaxially sleeved on the outer side of the reinforcement rod.

[0009] As a further solution of the present invention: a semi-annular protrusion is installed on the outer side of the end of each connecting rod and is used to prevent the sleeve from sliding off the reinforcement rod.

[0010] As a further solution of the present invention, reinforcing ribs for contacting with the surface of the prefabricated pipe pile are arranged on both the upper and lower annular surfaces of the annular sealing sleeve.

[0011] As a further solution of the present invention, the reinforcing ribs on each annular surface are uniformly arranged in sequence around the circumference of the annular surface.

[0012] As a further solution of the present invention, the oblique side of the reinforcing rib forms an angle of 45° with the horizontal plane.

[0013] As a further solution of the present invention, sealable casting holes are provided between adjacent reinforcing ribs.

[0014] As a further solution of the present invention: the annular sealing sleeve is made of PC material.

[0015] As a further solution of the present invention, the front ends of the opposite surfaces of the two connecting rods that are aligned with each other are both wedge surfaces, and the two wedge surfaces cooperate with each other to form a jaw that can be opened and closed by the two connecting rods.

[0016] A device and method for connecting an underwater prefabricated pipe pile foundation with a prefabricated pile column, the method using the above-mentioned device for connecting an underwater prefabricated pipe pile foundation with a prefabricated pile column, comprising the following steps: S1. Make a connecting seat on each end face of two prefabricated pipe piles. Evenly open stepped connecting holes with a thick bottom and a narrow mouth along the circumference on the butt end faces of the two connecting seats. Arrange connecting rods with wedge surfaces and protrusions on the sides. S2. After tightening the connecting rod with stepped ends and V-grooves, align it with the clamping holes of the upper and lower connecting seats and insert it. Release the pressure to automatically open the ends of the connecting rod and clamp the clamping holes to achieve vertical consolidation of the two prefabricated pipe piles. S3. The connecting rods of the upper and lower connecting seats are matched to form a cylindrical reinforcement rod. The sleeve is coaxially sleeved on the outside of the reinforcement rod. The protrusion at the end of the connecting rod is used to prevent the sleeve from sliding off, thereby enhancing lateral stability. S4. Build a grid-like skeleton consisting of longitudinal reinforcement and stirrups interlaced on the outside of the two connecting seats to serve as a load-bearing support structure for subsequent concrete pouring; S5. Place a two-petal annular sealing sleeve made of PC material on the outside of the steel skeleton, so that the annular sealing sleeve and the surface of the prefabricated pipe pile are closely abutted through the reinforcement ribs to form a closed clamping cavity; S6. Pour high-strength concrete into the clamp cavity through the pouring holes on the annular sealing sleeve, and vibrate to ensure uniform filling; after pouring, seal the pouring holes so that the annular sealing sleeve and the concrete form an integral protective structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention utilizes a watertight annular sealing sleeve, combined with the interlaced longitudinal reinforcement, stirrups, and poured concrete within the clamp cavity, to form a multi-layered protective structure. This not only effectively isolates water from the internal structure, slowing corrosion and extending service life, but also enhances the strength and stability of the joints, ensuring stable operation in complex underwater environments.

[0018] 2. The use of a stepped, narrow-bottomed connection hole and a connecting rod that tightens and opens to lock after insertion makes this unique connection method easy to operate and secure. Compared with traditional connection methods, it can better adapt to the complex conditions of underwater operations, reliably fastening the two connectors together and improving the reliability and stability of the connection.

[0019] 3. The connecting rods arranged on the sides of the connection seat are joined to form a reinforcement rod, and a sleeve is installed to further enhance the lateral stability and bending resistance of the connection. It can effectively resist underwater horizontal forces and bending moments, improve the overall structural strength of the prefabricated pipe pile underwater connection foundation, and maintain stability even in harsh underwater environments.

[0020] 4. The raised design on the outer side of the connecting rod end simply and cleverly solves the problem of sleeve slipping, ensuring that the connection between the reinforcement rod and the sleeve is always stable, guaranteeing the effectiveness of the reinforcement structure and thus improving the reliability of the entire underwater connection foundation.

[0021] 5. The reinforcing ribs arranged on the upper and lower ring surfaces of the annular sealing sleeve, on the one hand, enhance the contact effect between the annular sealing sleeve and the surface of the prefabricated pipe pile, thereby improving the sealing performance; on the other hand, they also enhance the structural strength of the annular sealing sleeve itself, making it more durable under underwater pressure environment.

[0022] 6. The reinforcement ribs are evenly arranged around the circumference of the ring surface, ensuring balanced force in all directions of the sealing sleeve, avoiding damage caused by local uneven force, and further improving the overall stability and reliability.

[0023] 7. The oblique side of the reinforcement is at a 45° angle to the horizontal plane. This angle design optimizes the force distribution of the reinforcement. While improving the structural strength, it can better disperse the underwater pressure and enhance the protection effect of the underwater connection foundation of the prefabricated pipe piles.

[0024] 8. The sealable pouring holes opened between adjacent reinforcement bars facilitate the pouring of concrete during the construction process, ensuring that the concrete in the cavity is fully filled. At the same time, they can be sealed after the pouring is completed to ensure the integrity and sealing of the structure.

[0025] 9. The annular sealing sleeve is made of PC material, which has good water resistance, corrosion resistance and mechanical strength. It can effectively resist the erosion of the underwater environment, further extend the service life of the annular sealing sleeve, and ensure the performance of the entire connection foundation.

[0026] 10. The wedge surfaces on the opposite sides of the connecting rod form a closable jaw, which makes it easy to adjust the position of the connecting rod during installation, making it easier to align the two connecting rods, improving the convenience and efficiency of installation, and also enhancing the tightness of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 It is a top view of the annular sealing sleeve in the present invention.

[0029] Figure 3 It is a cross-sectional view of the connecting seat in the present invention.

[0030] Figure 4 It is a bottom view of the connecting seat in the present invention.

[0031] Figure 5 Schematic diagram of the structure of the connecting rod in the present invention.

[0032] In the figure: 1. Connecting seat; 11. Clamping hole; 12. Connecting rod; 121. Wedge surface; 122. Protrusion; 2. Connecting rod; 21. V-shaped groove; 3. Annular sealing sleeve; 31. Casting hole; 32. Reinforcement rib; 33. Longitudinal rib; 34. Stirrup; 4. Sleeve; 5. Precast pipe pile; 6. High-strength concrete. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figures 1 to 5 In an embodiment of the present invention, a device for connecting an underwater prefabricated pipe pile foundation and a prefabricated pile column includes a connecting seat 1, a connecting rod 2, an annular sealing sleeve 3 and a sleeve 4.

[0035] Precast pipe pile 5 is precast using a precast mold and concrete. During or after the pouring process, a connector 1 is cast and secured to the end of precast pipe pile 5 using the mold and high-strength concrete 6, thereby connecting the precast pipe pile 5 and connector 1. The connector 1 uses a relatively small amount of concrete, so high-strength concrete 6 is used to achieve the required strength.

[0036] The connecting seat 1 is annular in shape, with one surface coaxially fixed to the prefabricated pipe pile 5, and the other surface docking with another connecting seat 1. Multiple engaging holes 11 are uniformly arranged along the circumference of the docking surface. Each engaging hole 11 is a stepped hole with a wide bottom and a narrow mouth, which is used to engage with the connecting rod 2.

[0037] Both ends of the connecting rod 2 are stepped, allowing them to be tightened and inserted into the engaging holes 11 and then opened to clamp the engaging holes 11. A V-shaped groove 21 is provided at the center surface of each end, so that the ends form jaws that can automatically open, facilitating insertion into the corresponding engaging holes 11. By aligning the connecting rods with the engaging holes 11 and applying a certain amount of pressure, the connecting rods 2 are brought together and gradually inserted into the engaging holes 11. Under the action of the axial limit of the steps, the two engaging holes 11 are clamped, thereby achieving a vertical connection between the two prefabricated pipe piles 5.

[0038] To further enhance the connection strength between the two connecting sockets 1, semi-cylindrical connecting rods 12 are evenly arranged along the outer annular surface of each connecting socket 1, with the axial direction of the connecting rods 12 perpendicular to the axis of the prefabricated pipe pile 5. The front ends of the opposing surfaces of the two connecting rods 12 are each formed with a wedge surface 121, which cooperates to form a retractable jaw between the two connecting rods 12. A semi-annular protrusion 122 is mounted on the outer side of the end of each connecting rod 12 to prevent the sleeve 4 from sliding off the reinforcement rod. External force is used to fit the sleeve 4 onto the two connecting rods 12. The tension of the jaws and the limiting action of the protrusion 122 ensure a stable connection between the two connecting rods 12.

[0039] After the connection base 1 is installed, longitudinal reinforcements 33 and stirrups 34 are arranged on its outer side in a crisscross pattern to provide a skeleton for the concrete to be poured into the annular sealing sleeve 3 .

[0040] The annular sealing sleeve 3, the main component of the connection base of the present invention, is divided into two parts along the axis of symmetry. During use, the two semi-annular parts are assembled according to the shape of the regular shape. After being aligned, they can be wrapped around the outside of the connection of the prefabricated pipe pile 5 to provide waterproof and corrosion protection. The annular sealing sleeve 3 is made of PC material, which has good waterproof performance and hardness.

[0041] The upper surface of the annular sealing sleeve 3 is provided with circular pouring holes 31, each of which is evenly spaced along the circumference of the annular surface. Portland cement concrete, incorporating a permeable cement-based composite material, is poured through each of these pouring holes 31 and vibrated to complete the concrete pouring. The provision of multiple pouring holes 31 avoids uneven concrete distribution during pouring. After pouring, these holes can be vibrated, further facilitating the concrete pouring process.

[0042] Reinforcing ribs 32 are arranged on both the upper and lower surfaces of the annular sealing sleeve 3 for contact with the surface of the precast tubular piles 5. The ribs 32 on each annular surface are evenly spaced around the circumference of the annular surface, ensuring that the annular sealing sleeve 3 will not significantly deform or collapse due to prolonged heavy loads after concrete pouring. For ease of production, the beveled edges of the ribs 32 typically form a 45° angle with the horizontal plane.

[0043] During construction, the connecting seat 1 is installed on the corresponding end of the prefabricated pipe pile 5, and then each upper prefabricated pipe pile 5 is hoisted, and each connecting rod 2 is inserted into the clamping hole 11 of the lower connecting seat 1; then the upper prefabricated pipe pile 5 is slowly lowered, and the clamping holes 11 of the upper connecting seat 1 are aligned with the connecting rod 2, so that the upper and lower prefabricated pipe piles 5 are fixed together through the connecting rod 2. Then, the sleeve 4 is used to be sequentially sleeved on each of the matching connecting rods 12. After the above work is completed, the longitudinal reinforcement 33 and stirrups 34 are woven on the outside of the connecting seat 1. Then, the annular sealing sleeve 3 is sleeved on the outside of the steel bar and concrete is poured into it through the pouring hole 31. Finally, all the pouring holes 31 are sealed with hole plugs and the concrete is allowed to solidify. In the subsequent use process, the annular sealing sleeve 3 is not removed and is used together with the prefabricated pipe pile 5 immersed in water.

[0044] The present invention is completely in an underwater environment during use. The PC material can isolate water from the reinforced concrete inside it, effectively preventing water from contacting the concrete, and improving the waterproof function to the greatest extent possible.

[0045] The annular sealing sleeve 3 is made of PC material, which has a certain degree of hardness. It is equivalent to adding a layer of reinforcement to the existing reinforced concrete reinforcement at the joint. The diagonal bracing at its bottom supports the entire reinforcement device around the joint, further ensuring the stability of the structure and playing a significant role in stabilizing the connection of the precast pipe pile 5.

[0046] If cracks eventually appear in the annular sealing sleeve 3, water will come into contact with the reinforced concrete. Under the erosion of water, cracks will appear in the concrete. The water will penetrate into the interior of the component along the cracks, come into contact with the concrete on both sides, and the active ingredients in the permeated crystallized cement-based composite material will enter the concrete along with the water, react with the free lime and oxides in the crack pores caused by tensile damage, form crystal precipitation, block the pores and cracks, and repair the concrete.

[0047] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A device for connecting an underwater prefabricated pipe pile foundation with a prefabricated pile column, characterized in that: The invention comprises two connecting seats (1) installed at the ends of two prefabricated pipe piles (5) butted against each other, and the two connecting seats (1) are fixedly connected to each other; the outer sides of the two connecting seats (1) are both provided with a water-proof annular sealing sleeve (3), a clamping cavity is formed between the annular sealing sleeve (3) and the connecting seat (1), longitudinal reinforcement (33) and stirrup reinforcement (34) connected to each other in an interlaced manner are arranged in the clamping cavity, and concrete is also poured in the clamping cavity.

2. The device for connecting an underwater prefabricated pipe pile foundation and a prefabricated pile column according to claim 1, characterized in that: The two end surfaces of the two connecting seats (1) that are aligned with each other are uniformly provided with snap-fit ​​holes (11) in sequence along their respective circumferential directions, and each snap-fit ​​hole (11) is a stepped hole with a thick bottom and a thin mouth. A connecting rod (2) is inserted into the two snap-fit ​​holes (11) aligned with each other, and both ends of the connecting rod (2) are stepped so as to be tightened and inserted into the snap-fit ​​hole (11) and then opened to clamp the snap-fit ​​hole (11), so as to fix the two connecting seats (1) together.

3. The device for connecting an underwater prefabricated pipe pile foundation and a prefabricated pile column according to claim 2, characterized in that: Semi-cylindrical connecting rods (12) are uniformly arranged in sequence along the circumference of each of the two connecting seats (1), and the axial direction of the connecting rod (12) is perpendicular to the axis of the prefabricated pipe pile (5); the two corresponding connecting rods (12) above and below are matched with each other to form a cylindrical reinforcement rod, and a sleeve (4) is coaxially sleeved on the outer side of the reinforcement rod.

4. The device for connecting an underwater prefabricated pipe pile foundation and a prefabricated pile column according to claim 3, characterized in that: A semi-annular protrusion (122) is installed on the outer side of the end of each connecting rod (12) and is used to prevent the sleeve (4) from sliding off the reinforcement rod.

5. A device for connecting an underwater prefabricated pipe pile foundation and a prefabricated pile column according to any one of claims 1 to 4, characterized in that: Reinforcing ribs (32) for contacting the surface of the prefabricated pipe pile (5) are arranged on both the upper and lower annular surfaces of the annular sealing sleeve (3).

6. The device for connecting an underwater prefabricated pipe pile foundation and a prefabricated pile column according to claim 5, characterized in that: The reinforcing ribs (32) on each annular surface are uniformly arranged in sequence around the circumference of the annular surface.

7. The device for connecting an underwater prefabricated pipe pile foundation and a prefabricated pile column according to claim 6, characterized in that: The beveled edge of the reinforcement rib (32) is at an angle of 45° to the horizontal plane.

8. The device for connecting an underwater prefabricated pipe pile foundation and a prefabricated pile column according to claim 7, characterized in that: Sealable casting holes (31) are provided between adjacent reinforcing ribs (32).

9. The device for connecting an underwater prefabricated pipe pile foundation and a prefabricated pile column according to claim 8, characterized in that: The front ends of the opposite surfaces of the two connecting rods (12) that are aligned with each other are both wedge surfaces (121), and the two wedge surfaces (121) cooperate with each other to form a jaw that can be opened and closed.

10. A device and method for connecting an underwater prefabricated pipe pile foundation with a prefabricated pile column, the method using the device for connecting an underwater prefabricated pipe pile foundation with a prefabricated pile column as claimed in claim 9, characterized in that: The following steps are involved: S1. A connecting seat (1) is made on each end face of two prefabricated pipe piles (5). Step-shaped clamping holes (11) with a thick bottom and a thin mouth are uniformly opened along the circumference on the butt end faces of the two connecting seats (1). Connecting rods (12) with wedge surfaces (121) and protrusions (122) are arranged on the sides. S2. After tightening the connecting rod (2) with stepped ends and V-shaped grooves (21), align it with the clamping holes (11) of the upper and lower connecting seats (1) and insert it. Release the pressure to automatically open the ends of the connecting rod (2), clamp the clamping holes (11), and realize the vertical consolidation of the two prefabricated pipe piles (5); S3, making the connecting rods (12) of the upper and lower connecting seats (1) cooperate to form a cylindrical reinforcement rod, coaxially sleeve the sleeve (4) on the outside of the reinforcement rod, and using the protrusion (122) at the end of the connecting rod (12) to prevent the sleeve (4) from sliding off, thereby enhancing lateral stability; S4. A grid-like skeleton consisting of longitudinal bars (33) and stirrups (34) is constructed on the outside of the two connecting seats (1) to serve as a load-bearing support structure for subsequent concrete pouring; S5, a two-petal annular sealing sleeve (3) made of PC material is placed on the outside of the grid-shaped frame, so that the annular sealing sleeve (3) and the surface of the prefabricated pipe pile (5) are tightly abutted through the reinforcing ribs (32) to form a closed clamping cavity; S6. Concrete is poured into the clamp cavity through the pouring hole (31) on the annular sealing sleeve (3), and vibrated to ensure uniform filling; after pouring, the pouring hole (31) is covered so that the annular sealing sleeve (3) and the concrete form an integral protective structure.

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