A kind of offshore photovoltaic PHC pipe pile frost heaving damage reinforcing device

Abstract

The present application relates to photovoltaic pipe pile reinforcing technical field, especially to a kind of offshore photovoltaic PHC pipe pile frost heaving damage reinforcing device, including carbon fiber cloth winding layer and assembly type sleeve;The carbon fiber cloth winding layer is wrapped in the frost heaving damage area of PHC pipe pile;The carbon fiber cloth winding layer is tightly combined with pile body by epoxy resin adhesive, and high-strength anti-cracking layer is formed;The assembly type sleeve is formed by two half-round steel components, is set outside carbon fiber cloth winding layer and is mutually connected, for providing radial restraint force;Two half-round steel components are first half sleeve and second half sleeve respectively.For the offshore photovoltaic PHC pipe pile after frost heaving cracking, carbon fiber cloth winding layer reinforcement can improve its bearing capacity, rigidity and stability, effectively inhibit crack propagation;Assembly type sleeve enhances the hoop restraint effect of carbon fiber cloth winding layer, improves the durability and fatigue resistance of overall structure, especially suitable for offshore complex corrosion environment and periodic load action.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic pipe pile reinforcement technology, and in particular to a device for reinforcing marine photovoltaic PHC pipe piles to prevent frost heave damage. Background Technology

[0002] Against the backdrop of global efforts to address climate change, energy security pressures, and the transition to a green economy, renewable energy has rapidly emerged and become a crucial direction for international energy development. Among these renewable energy industries, photovoltaic (PV) power generation, due to its abundant resources, low carbon footprint, environmental friendliness, and ease of maintenance, has become one of the most promising new energy sources. Prestressed high-strength concrete (PHC) pipe piles, as an important foundation form for PV systems, offer advantages such as high strength, good economic efficiency, and convenient construction. In practical engineering, considering the potential damage to PV modules from ocean waves, the pipe piles need to be cantilevered 3-5 meters above sea level. Excessive deformation can lead to damage because they bear not only vertical loads from the superstructure but also lateral loads from wind, waves, and earthquakes.

[0003] In marine engineering, rainwater and seawater entering the cavity of cantilever pipe piles can freeze and expand at low temperatures, causing cracks in the pile body. These cracks reduce the mechanical properties of the piles, posing a threat to photovoltaic systems and requiring timely repair. However, replacing cracked cantilever piles is costly. Therefore, adopting efficient and economical reinforcement measures to restore their mechanical properties and meet engineering requirements has become an inherent need in engineering practice. Summary of the Invention

[0004] The purpose of this invention is to provide a device for reinforcing marine photovoltaic PHC pipe piles to prevent frost heave damage, thereby solving at least one of the technical problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides a device for reinforcing marine photovoltaic PHC pipe piles against frost heave damage, comprising a carbon fiber cloth winding layer and an assembled sleeve;

[0006] The carbon fiber cloth wrapping layer is wrapped around the frost heave damage area of ​​the PHC pipe pile;

[0007] The carbon fiber cloth winding layer is tightly bonded to the pile body by epoxy resin adhesive to form a high-strength crack-resistant layer;

[0008] The assembled sleeve is composed of two semi-circular steel components joined together, which are sleeved on the outside of the carbon fiber cloth winding layer and connected to each other to provide radial constraint force.

[0009] The two semi-circular steel components are the first half-sleeve and the second half-sleeve, respectively.

[0010] The first half-sleeve includes a first semi-circular body and a first fixed connecting plate integrally formed with the first semi-circular body;

[0011] The second half-sleeve includes a second semi-circular body and a second fixed connecting plate integrally formed with the second semi-circular body;

[0012] Two first fixed connecting plates are symmetrically arranged at both ends of the first semi-circular body, and two second fixed connecting plates are symmetrically arranged at both ends of the second semi-circular body;

[0013] The first fixed connecting plate and the second fixed connecting plate are respectively provided with a first bolt hole and a second bolt hole, and a fastening connection is achieved by passing a high-strength bolt through the first bolt hole and the second bolt hole.

[0014] Furthermore, the first prestressed anchor plates are also provided at both ends of the first half-sleeve along the axial direction;

[0015] The second half-sleeve is also provided with second prestressed anchor plates at both ends of its axial direction;

[0016] Both the first prestressed end plate and the second prestressed end plate at both ends are provided with end plate through holes;

[0017] Prestressed steel strands are inserted into the through hole, and initial radial pressure is applied to the assembled sleeve by tensioning the prestressed steel strands.

[0018] After tensioning, the prestressed steel strand is anchored to the first prestressed anchor plate or the second prestressed anchor plate by a first anchor provided at its end.

[0019] Furthermore, the first half-sleeve also includes a first reinforcing rib plate fixedly disposed on the first semi-circular body;

[0020] The second half-sleeve also includes a second reinforcing rib plate fixedly disposed on the second semi-circular body;

[0021] The first reinforcing ribs are evenly arranged along the radial outer side of the first semi-circular body.

[0022] The second reinforcing ribs are evenly arranged along the radial outer side of the second semi-circular body.

[0023] Furthermore, the first reinforcing rib and the second reinforcing rib are also provided with rib through holes for the prestressed steel strands to pass through sequentially.

[0024] Furthermore, it also includes an anti-pull-out device;

[0025] The anti-pull-out device includes an anti-pull-out pull bracket;

[0026] One end of the anti-pull-out bracket is hinged to the seabed surface, and the other end is hinged to the high-strength bolt;

[0027] The anti-pull-out bracket includes a long support rod, a short support rod, and a hinge seat;

[0028] The long support pole and the short support pole are hinged together at the ends near the seabed by hinge seats fixedly installed on the seabed.

[0029] The ends of the long support rod and the short support rod furthest from the seabed are respectively hinged to different high-strength bolts to form a triangular support structure, which restricts the rotation and pull-out of the bolts under extreme loads.

[0030] Furthermore, the anti-pull-out device also includes a first inclined strand and a second inclined strand;

[0031] One end of the first inclined strand is anchored to the first fixed connecting plate, and the other end passes through the second fixed connecting plate and is anchored to a fixed anchor point on the seabed.

[0032] One end of the second inclined strand is anchored to the second fixed connecting plate, and the other end passes through the first fixed connecting plate and is anchored to symmetrical fixed anchor points on the seabed.

[0033] Furthermore, the first inclined strand and the second inclined strand are respectively anchored to the first fixed connecting plate and the second fixed connecting plate by second anchors fixed at their ends;

[0034] Both the first fixed connecting plate and the second fixed connecting plate are provided with anchor grooves that cooperate with the second anchor.

[0035] Furthermore, the second anchor is a semi-ellipsoidal structure, and its long axis end is fixedly connected to the first or second inclined strand;

[0036] The shape of the anchor groove matches the shape of the second anchor to ensure a tight fit during anchoring and prevent loosening;

[0037] When vertical misalignment occurs between the first half-plate and the second half-plate, the second anchor generates a wedge-tightening effect in the anchor groove. The curved surface of the semi-ellipsoidal structure is squeezed against the inner wall of the anchor groove, converting part of the tension of the first or second inclined strand into radial locking force and restoring force.

[0038] Furthermore, a rubber gasket is provided between the assembled sleeve and the carbon fiber cloth winding layer to enhance the friction between the sleeve and the carbon fiber cloth winding layer and prevent stress concentration.

[0039] The rubber gasket includes a middle sleeve, an upper sleeve, and a lower sleeve;

[0040] The intermediate sleeve is cylindrical;

[0041] The upper sleeve includes an upper fixed plate and an upper rotating plate, and the upper rotating plate can rotate relative to the upper fixed plate;

[0042] The lower sleeve includes a lower fixed plate and a lower rotating plate, and the lower rotating plate can rotate relative to the lower fixed plate;

[0043] The upper fixing plate and the lower fixing plate are fixedly connected to the upper and lower ends of the intermediate sleeve;

[0044] In the initial state, the lower rotating plate hangs down naturally under gravity. When it is put on from above the PHC pipe pile, the rubber pad sleeve automatically adheres to the outer wall of the pipe pile due to gravity. The upper rotating plate rotates due to contact force during the insertion process and eventually adheres to the outer wall of the pipe pile.

[0045] Furthermore, two upper fixing plates are arranged opposite each other, and two upper rotating plates are arranged opposite each other between the two upper fixing plates;

[0046] Two lower fixing plates are arranged opposite each other, and two lower rotating plates are arranged opposite each other between the two lower fixing plates;

[0047] Magnetic blocks are provided at the corners above the two upper rotating plates and at the corners below the two lower rotating plates. The magnetic blocks attract each other through opposite magnetic poles.

[0048] In a vertical position, the two lower rotating plates naturally droop under the action of gravity, overcoming the attraction of the magnetic blocks, ensuring smooth insertion into the pipe pile. Meanwhile, the upper end of the upper rotating plate remains closed due to the attraction of the magnetic blocks. As the rubber pad moves down and contacts the outer wall of the pipe pile, it is separated by force and rotates to the fitting position. Attached Figure Description

[0049] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0050] Figure 1 A three-dimensional structural diagram of a carbon fiber cloth wrapping layer on a PHC pipe pile;

[0051] Figure 2 A three-dimensional structural diagram of installing prefabricated sleeves on PHC pipe piles;

[0052] Figure 3 This is a three-dimensional structural diagram of the assembled sleeve;

[0053] Figure 4 A three-dimensional structural diagram of a prestressed precast sleeve installed on a PHC pipe pile;

[0054] Figure 5 A schematic diagram of the three-dimensional structure after the bracket is installed to prevent it from being pulled out;

[0055] Figure 6 A three-dimensional structural diagram to prevent the pull-out bracket;

[0056] Figure 7 A three-dimensional structural diagram of the anti-pull-out device after installation;

[0057] Figure 8 A schematic diagram of the planar structure after the anti-pull-out device is installed;

[0058] Figure 9 A schematic diagram of the planar structure in which the second anchor is positioned orthogonally in the anchor groove;

[0059] Figure 10 This is a schematic diagram of the planar structure when the second anchor is tilted in the anchor groove;

[0060] Figure 11 A top-view sectional view of the PHC pipe pile after the carbon fiber cloth wrapping layer, rubber gasket and assembled casing have been installed;

[0061] Figure 12 This is a schematic diagram of the three-dimensional structure of the rubber gasket.

[0062] Figure 13 A three-dimensional structural diagram of the rubber gasket sleeve after it is fitted onto the PHC pipe pile;

[0063] Figure 14 A three-dimensional structural diagram of the PHC pipe pile after it has been completely installed on the PHC pipe pile.

[0064] Figure label:

[0065] 1-Carbon fiber cloth winding layer; 2-Assembled sleeve; 3-PHC pipe pile; 4-First half-sleeve; 5-Second half-sleeve; 6-First semi-circular body; 7-First fixing connection plate; 8-Second semi-circular body; 9-Second fixing connection plate; 10-First bolt hole; 11-Second bolt hole; 12-High-strength bolt; 13-First prestressed anchor plate; 14-Second prestressed anchor plate; 15-Prestressed steel strand; 16-First anchorage; 17-First reinforcing rib plate ; 18-Second reinforcing rib; 19-Anti-pull-out device; 20-Anti-pull-out tie; 21-Long frame rod; 22-Short frame rod; 23-Hinge seat; 24-First inclined strand; 25-Second inclined strand; 26-Second anchor; 27-Anchor groove; 28-Rubber pad sleeve; 29-Intermediate sleeve; 30-Upper sleeve; 31-Lower sleeve; 32-Upper fixing plate; 33-Upper rotating plate; 34-Lower fixing plate; 35-Lower rotating plate; 36-Magnetic block. Detailed Implementation

[0066] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0067] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0068] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0069] It should also be noted that the specific embodiments or implementation methods described below are a series of optimized settings listed by the present invention to further explain the specific content of the invention, and these settings can be combined or used in conjunction with each other.

[0070] The present invention will be further explained below with reference to specific embodiments.

[0071] like Figure 1-3 As shown in the figure, the offshore photovoltaic PHC pipe pile frost heave damage reinforcement device provided in this embodiment includes a carbon fiber cloth winding layer 1 and an assembled sleeve 2.

[0072] The carbon fiber cloth wrapping layer 1 is wrapped around the frost heave damage area of ​​the PHC pipe pile 3;

[0073] The carbon fiber cloth winding layer 1 is tightly bonded to the pile body by epoxy resin adhesive to form a high-strength crack-resistant layer;

[0074] The assembled sleeve 2 is composed of two semi-circular steel components joined together, sleeved on the outside of the carbon fiber cloth winding layer 1 and connected to each other, to provide radial constraint force;

[0075] The two semi-circular steel components are the first half-sleeve 4 and the second half-sleeve 5, respectively.

[0076] The first semi-sleeve 4 includes a first semi-circular body 6 and a first fixed connecting plate 7 integrally formed with the first semi-circular body 6;

[0077] The second semi-sleeve 5 includes a second semi-circular body 8 and a second fixed connecting plate 9 integrally formed with the second semi-circular body 8;

[0078] Two first fixed connecting plates 7 are symmetrically arranged at both ends of the first semi-circular body 6, and two second fixed connecting plates 9 are symmetrically arranged at both ends of the second semi-circular body 8;

[0079] The first fixed connecting plate 7 and the second fixed connecting plate 9 are respectively provided with a first bolt hole 10 and a second bolt hole 11, and a fastening connection is achieved by passing a high-strength bolt 12 through the first bolt hole 10 and the second bolt hole 11.

[0080] This embodiment addresses the offshore photovoltaic PHC pipe pile 3 that has undergone frost heave cracking. A carbon fiber cloth winding layer 1 is used for reinforcement, enhancing the load-bearing capacity, stiffness, and stability of the cracked PHC pipe pile 3 while effectively inhibiting further crack propagation. The prefabricated sleeve 2 not only strengthens the circumferential restraint effect of the carbon fiber cloth winding layer 1 but also improves the overall structural durability and fatigue resistance, making it particularly suitable for complex corrosive marine environments and cyclic loads. An epoxy resin adhesive achieves a strong bond between the carbon fiber cloth winding layer 1 and the pile body, significantly improving interfacial bond strength and ensuring effective stress transfer. This reinforcement device is easy to install and can be quickly assembled on-site, providing reliable technical support for the long-term safe operation of offshore photovoltaic infrastructure.

[0081] like Figure 4 As shown, as a further embodiment of this example, the first half-sleeve 4 is further provided with a first prestressed anchor plate 13 at both ends of the axial direction.

[0082] The second half-sleeve 5 is also provided with second prestressed anchor plates 14 at both ends of the axial direction;

[0083] Both the first prestressed end plate and the second prestressed end plate at both ends are provided with end plate through holes;

[0084] Prestressed steel strands 15 are inserted into the through hole, and initial radial pressure is applied to the assembled sleeve 2 by tensioning the prestressed steel strands 15.

[0085] After tensioning, the prestressed steel strand 15 is anchored to the first prestressed anchor plate 13 or the second prestressed anchor plate 14 by the first anchor 16 provided at the end.

[0086] The tensioning of the prestressed steel strand 15 effectively enhances the radial constraint force of the sleeve on the carbon fiber cloth winding layer 1, further strengthening the synergistic performance between the reinforcement layer and the pile. Furthermore, by applying initial pressure, the interfacial relaxation problem caused by temperature changes and seawater erosion during service is significantly improved, thus enhancing overall durability.

[0087] As a further embodiment of this embodiment, the first half-sleeve 4 also includes a first reinforcing rib 17 fixedly disposed on the first semi-circular body 6.

[0088] The second half-sleeve 5 also includes a second reinforcing rib 18 fixedly disposed on the second semi-circular body 8;

[0089] The first reinforcing rib 17 is evenly arranged along the radial outer side of the first semi-circular body 6.

[0090] The second reinforcing rib 18 is evenly arranged along the radial outer side of the second semi-circular body 8.

[0091] As a further embodiment of this invention, the first reinforcing rib 17 and the second reinforcing rib 18 are also provided with rib through holes for the prestressed steel strands 15 to pass through sequentially.

[0092] The through holes in the ribs and end plates are arranged coaxially to ensure that the prestressed steel strands 15 pass through straight, reducing frictional losses during tensioning. The reinforced ribs significantly improve the local stiffness and bending resistance of the semi-casing, effectively preventing deformation caused by external forces during assembly. The overall structure, through the coordinated action of multiple defenses, greatly enhances the long-term service performance and safety reserves of the offshore photovoltaic PHC pipe pile 3 in complex marine environments. The rational layout and tension control of the prestressed steel strands 15 ensure the uniform application of initial prestress, avoiding damage to the carbon fiber wrapping layer 1 due to localized stress concentration. Through a staged tensioning process, precise control of the radial pressure of the casing is achieved, further improving the overall collaborative performance of the structure. Considering the characteristics of the marine environment, the prestressed steel strands 15 are protected by a galvanized layer and an external anti-corrosion coating, effectively resisting chloride ion corrosion and ensuring long-term durability.

[0093] like Figure 5-6 As shown, as a further embodiment of this example, an anti-pull-out device 19 is also included;

[0094] The anti-pull-out device 19 includes an anti-pull-out pull bracket 20;

[0095] One end of the anti-pull-out bracket 20 is hinged to the seabed surface, and the other end is hinged to the high-strength bolt 12;

[0096] The anti-pull-out bracket 20 includes a long frame rod 21, a short frame rod 22, and a hinge seat 23;

[0097] The long support pole 21 and the short support pole 22 are hinged together at the ends near the seabed by a hinge seat 23 fixedly installed on the seabed.

[0098] The ends of the long support rod 21 and the short support rod 22 away from the seabed are respectively hinged to different high-strength bolts 12 to form a triangular support structure, so as to restrict the rotation and pull-out of the bolts under extreme loads.

[0099] This embodiment addresses the offshore photovoltaic PHC pipe pile 3 that has undergone frost heave and cracking. While a carbon fiber wrapping layer 1 and a prestressed assembled steel sleeve are installed, which can withstand typhoons or super typhoons and significantly improve load-bearing capacity, stability, and rigidity, the pile itself, though intact, is still pulled out entirely under the combined effects of horizontal typhoon or super typhoon forces and upward ocean currents, ultimately leading to damage and failure of the offshore photovoltaic system. Therefore, an anti-pull-out device 19 is proposed. In this application, the anti-pull-out device 19 effectively disperses the load through the invariant geometric properties of a triangle, significantly improving the shear and tensile strength of the connection nodes. Under extreme conditions such as wave impact and ship collisions, the anti-pull-out tie 20, in conjunction with high-strength bolts 12, maintains the integrity of the anchoring system, preventing sleeve connection failure. Each hinge point uses corrosion-resistant alloy materials and is equipped with a sealing and lubrication device to ensure rotational flexibility and connection reliability during long-term service. The anti-pull-out device 19, together with the prestressed tensioning system and reinforcing ribs, constitutes a multi-layered protection system, comprehensively improving the stability and safety of the offshore photovoltaic PHC pipe pile foundation.

[0100] like Figure 7-8 As shown, as a further embodiment of this example, the anti-pull-out device 19 further includes a first inclined strand 24 and a second inclined strand 25.

[0101] One end of the first inclined strand 24 is anchored to the first fixed connecting plate 7, and the other end passes through the second fixed connecting plate 9 and is anchored to a fixed anchor point on the seabed.

[0102] One end of the second inclined strand 25 is anchored to the second fixed connecting plate 9, and the other end passes through the first fixed connecting plate 7 and is anchored to symmetrical fixed anchor points on the seabed.

[0103] As a further embodiment of this embodiment, the first inclined strand 24 and the second inclined strand 25 are respectively anchored to the first fixed connecting plate 7 and the second fixed connecting plate 9 by the second anchor 26 fixedly provided at the end;

[0104] Both the first fixed connecting plate 7 and the second fixed connecting plate 9 are provided with anchor grooves 27 that cooperate with the second anchor 26.

[0105] When waves surge in with greater force, the impact force on the pipe piles submerged in seawater also increases. In this situation, the sleeve needs to grip the pipe pile with greater force. Only by applying a greater gripping force can the probability of damage to the pipe pile under the strong impact force be effectively reduced. At the same time, large waves exert an upward force on the pipe pile during impact, which could potentially cause the pile to be pulled out of the seabed.

[0106] When stranded wire is introduced into the entire structure, it plays a unique role once the pipe pile shows an upward pulling tendency. It causes the two halves of the sleeve to gradually approach and compress. First, this approaching compression further enhances the sleeve's grip on the pipe pile. Given that the pipe pile may crack under wave impact, the tighter grip of the sleeve prevents further damage at the cracks, avoiding a greater impact on the structural stability of the pipe pile due to crack expansion. Second, the sleeve's grip on the pipe pile significantly increases the friction between the sleeve and the pipe pile. This increased friction ensures that relative slippage does not occur between the sleeve and the pipe pile during wave impact. Relative slippage not only affects the stability of the entire structure but may also exacerbate wear on the pipe pile and sleeve. Third, the stranded wire itself provides a downward pulling force to the sleeve. This downward pulling force effectively resists the upward force of the waves on the pipe pile, thus preventing the pipe pile from being pulled out of the seabed and ensuring the safety and stability of the entire pipe pile structure in harsh wave environments.

[0107] like Figure 9-10 As shown, as a further embodiment of this example, the second anchor 26 is a semi-ellipsoidal structure, and its long axis end is fixedly connected to the first inclined strand 24 or the second inclined strand 25.

[0108] The shape of the anchor groove 27 matches the shape of the second anchor 26 to ensure a tight fit during anchoring and prevent loosening;

[0109] When vertical misalignment occurs between the first half-plate and the second half-plate, the second anchor 26 generates a wedge-tightening effect in the anchor groove 27. The curved surface of the semi-ellipsoidal structure is squeezed against the inner wall of the anchor groove 27, converting part of the tension of the first inclined strand 24 or the second inclined strand 25 into radial locking force and restoring force.

[0110] This embodiment achieves effective protection of pipe piles in complex marine environments through the aforementioned structural design. The cooperation between the semi-ellipsoidal second anchor 26 and the matching anchor groove 27 generates a wedge-tightening effect when vertical misalignment occurs. This not only improves the reliability of the connection but also utilizes the tension of the strand to generate additional radial locking force, further enhancing the clamping effect of the sleeve on the pipe pile. Due to the use of a semi-ellipsoidal structure, compared to a traditional spherical structure, when the second anchor 26 tilts, its contact with the inner wall of the anchor groove 27 is a misaligned contact. On the one hand, this raises the anchoring point height of the inclined strand, increasing the restoring force of the inclined strand. On the other hand, it makes the tension of the inclined strand tend to bring the two half-sleeves closer to the center and return them to their original position, thereby achieving an adaptive reset function under dynamic loads.

[0111] like Figure 11-14As shown, as a further embodiment of this embodiment, a rubber gasket 28 is also provided between the assembled sleeve 2 and the carbon fiber cloth winding layer 1 to enhance the friction between the sleeve and the carbon fiber cloth winding layer 1 and prevent stress concentration.

[0112] The rubber pad sleeve 28 includes a middle sleeve 29, an upper sleeve 30, and a lower sleeve 31;

[0113] The intermediate sleeve 29 is cylindrical;

[0114] The upper sleeve 30 includes an upper fixed plate 32 and an upper rotating plate 33, and the upper rotating plate 33 can rotate relative to the upper fixed plate 32.

[0115] The lower sleeve 31 includes a lower fixed plate 34 and a lower rotating plate 35, and the lower rotating plate 35 can rotate relative to the lower fixed plate 34;

[0116] The upper fixing plate 32 and the lower fixing plate 34 are fixedly connected to the upper and lower ends of the intermediate sleeve 29;

[0117] In the initial state, the lower rotating plate 35 hangs down naturally under gravity. When it is put on from above the PHC pipe pile 3, the lower rotating plate 35 of the rubber pad 28 automatically adheres to the outer wall of the pipe pile under gravity. The upper rotating plate 33 rotates due to contact force during the insertion process and eventually adheres to the outer wall of the pipe pile.

[0118] In this application, a rubber gasket 28 with movable parts is provided between the assembled sleeve 2 and the carbon fiber cloth winding layer 1. For the contact surface between the rubber gasket 28 and the carbon fiber cloth winding layer 1, the good adhesion and compatibility between the two materials effectively transmit interfacial shear stress, preventing local peeling or slippage. Simultaneously, the elastic deformation capacity of the rubber gasket 28 can coordinate the strain difference between the carbon fiber cloth winding layer 1 and the sleeve, further improving the overall structural performance and maintaining a stable anchoring state under dynamic loads, extending the durability and service life of the protection system. For the contact surface between the rubber gasket 28 and the outer wall of the pipe pile, its flexibility effectively prevents scratches or damage caused by rigid contact between the assembled sleeve 2 and the carbon fiber cloth winding layer 1. At the same time, adaptive bonding eliminates contact gaps, ensuring uniform pressure transmission. Furthermore, the tight fit between the rubber gasket 28 and the outer wall of the pipe pile can be dynamically adjusted according to the closure degree of the first half-sleeve 4 and the second half-sleeve 5, further improving the interfacial sealing effect. In terms of vertical displacement, the rubber pad 28 can provide a certain extension stroke in the vertical direction, that is, a vertical displacement buffer layer is formed between the assembled sleeve 2 and the carbon fiber cloth winding layer 1, which effectively alleviates the accumulation of vertical stress caused by temperature changes, foundation settlement or wave impact.

[0119] As a further embodiment of this embodiment, two upper fixing plates 32 are arranged opposite to each other, and two upper rotating plates 33 are arranged opposite to each other between the two upper fixing plates 32;

[0120] Two lower fixing plates 34 are arranged opposite each other, and two lower rotating plates 35 are arranged opposite each other between the two lower fixing plates 34;

[0121] Magnetic blocks 36 are provided at the corners above the two upper rotating plates 33 and at the corners below the two lower rotating plates 35. The magnetic blocks 36 are attracted to each other by opposite magnetic poles.

[0122] In the vertical position, the two lower rotating plates 35 naturally droop under the action of gravity, overcoming the attraction force of the magnetic blocks 36, to ensure smooth insertion into the pipe pile. Meanwhile, the upper end of the upper rotating plate 33 remains closed due to the attraction of the magnetic blocks 36. When it moves down with the rubber pad 28 and contacts the outer wall of the pipe pile, it is separated by force and rotates to the fitting position.

[0123] In this application, the upper sleeve 30 and the lower sleeve 31 have the same structure, which facilitates production. In actual use, the same function can be achieved regardless of which part faces upward, which reduces the directional requirements during installation and improves construction efficiency.

[0124] The rubber gasket 28 disclosed in this application has a symmetrical structure, allowing for easy interchange of its upper and lower orientations during actual assembly without distinguishing the assembly sequence of the upper and lower parts. During assembly, the rubber gasket 28 is first vertically hoisted. At this time, the two lower rotating plates 35 naturally droop under gravity, facilitating insertion into the pipe pile, while the two upper rotating plates 33 remain temporarily closed due to the attraction of the magnetic blocks 36. As the rubber gasket 28 slowly moves down along the outer wall of the pipe pile, the upper rotating plates 33, upon contacting the pile surface, are driven by a reaction force to gradually overcome the magnetic attraction and rotate outward until they completely conform to the circumference of the pipe pile, achieving self-adaptive closure. At this point, both sets of rotating plates are tightly attached to the outer wall of the pipe pile, forming a continuous sealed support structure that effectively transmits radial pressure and disperses local stress concentration. The symmetrical design, combined with the magnetic positioning mechanism, not only simplifies the on-site installation process but also significantly improves the assembly accuracy and connection reliability of the rubber gasket 28 and the casing system, maintaining structural stability and durability even under complex marine conditions. Meanwhile, the magnetic attraction force of the magnetic block 36 is precisely calculated to ensure that the upper rotating plate 33 can be stably closed when not in operation, and can be smoothly triggered to open when in contact with the pipe pile, thus avoiding excessive resistance that could lead to assembly difficulties.

[0125] By adopting the above technical solution, the present invention has the following beneficial effects:

[0126] (1) For the offshore photovoltaic PHC pipe pile 3 after frost heave cracking, the carbon fiber cloth winding layer 1 can enhance its bearing capacity, stiffness and stability, and effectively suppress crack propagation; the prefabricated sleeve 2 enhances the circumferential restraint effect of the carbon fiber cloth winding layer 1, improves the overall structural durability and fatigue resistance, and is especially suitable for complex offshore corrosion environment and periodic load.

[0127] (2) The epoxy resin adhesive makes the carbon fiber cloth winding layer 1 firmly bonded to the pile body, improves the interface bonding strength, and ensures effective stress transfer; the prestressed steel strand 15 tensions the lifting sleeve to exert radial constraint force on the carbon fiber cloth winding layer 1, enhances the cooperative working performance of the reinforcement layer and the pile body, improves the interface relaxation problem, and improves the overall durability; strengthens the local stiffness and bending resistance of the rib lifting half sleeve, prevents assembly deformation, ensures that the prestressed steel strand 15 passes through straight, and reduces friction loss.

[0128] (3) The overall structure improves the long-term service performance and safety reserve of the offshore photovoltaic PHC pipe pile 3 in complex marine environments through the synergistic effect of multiple defense lines; the reasonable layout and tension control of the prestressed steel strand 15 avoids local stress concentration damage to the carbon fiber cloth winding layer 1, and the staged tensioning process accurately controls the radial pressure of the sleeve, further improving the synergistic working performance; the prestressed steel strand 15 has double protection to resist chloride ion corrosion and ensure long-term durability.

[0129] (4) The anti-pullout device 19 utilizes the geometric invariance of triangles to distribute the load, enhance the shear and tensile strength of the connection nodes, maintain the integrity of the anchoring system under extreme working conditions, and prevent the sleeve connection from failing. Each hinge point is made of corrosion-resistant alloy material and is equipped with a sealing and lubrication device to ensure rotational flexibility and connection reliability. The anti-pullout device 19, together with the prestressed tensioning system and the reinforcing ribs, constitutes a multi-layer protection system to comprehensively improve the stability and safety of the pipe pile foundation.

[0130] (5) After the introduction of the inclined strand, when the pipe pile tends to be pulled up, the strand will bring the two halves of the sleeve closer together and squeeze them, which will enhance the tightness of the sleeve on the pipe pile, prevent the crack from expanding, increase the friction to avoid relative sliding, and the strand itself will provide downward pull to resist the upward force of the waves, thus ensuring the safety and stability of the pipe pile structure.

[0131] (6) The semi-ellipsoidal second anchor 26 and the matching anchor groove 27 cooperate to generate a wedge tightening effect when vertically misaligned, which improves the reliability of the connection part and generates radial locking force to enhance the sleeve clamping effect; the semi-ellipsoidal structure makes the tension of the inclined strand tend to bring the half sleeve plate closer and return to its position, realizing the adaptive reset function under dynamic load.

[0132] (7) The rubber pad 28 enhances the friction between the rubber pad and the carbon fiber cloth winding layer 1, prevents stress concentration, coordinates the strain difference in elastic deformation, improves the collaborative working performance, maintains a stable anchoring state, and extends the durability and service life of the protection system; the flexible feature avoids rigid contact damage to the carbon fiber cloth winding layer 1, the adaptive fit eliminates the contact gap, ensures uniform pressure transmission, dynamically adjusts according to the degree of closure to improve the tight fit effect, forms a vertical displacement buffer layer, and alleviates the accumulation of vertical stress.

[0133] (8) The upper and lower structures of the rubber pad sleeve 28 are identical and symmetrical, and the actual assembly can be adjusted at will, reducing the installation direction requirements and improving construction efficiency; the magnetic positioning mechanism simplifies the on-site installation process, improves the assembly accuracy and connection reliability, maintains structural stability and durability under complex marine working conditions, and the magnetic force is accurately calculated to avoid assembly difficulties.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for reinforcing marine photovoltaic PHC pipe piles against frost heave damage, characterized in that, Includes carbon fiber fabric winding layer and assembled sleeve; The carbon fiber cloth wrapping layer is wrapped around the frost heave damage area of ​​the PHC pipe pile; The carbon fiber cloth winding layer is tightly bonded to the pile body by epoxy resin adhesive to form a high-strength crack-resistant layer; The assembled sleeve is composed of two semi-circular steel components joined together, which are sleeved on the outside of the carbon fiber cloth winding layer and connected to each other to provide radial constraint force. The two semi-circular steel components are the first half-sleeve and the second half-sleeve, respectively. The first half-sleeve includes a first semi-circular body and a first fixed connecting plate integrally formed with the first semi-circular body; The second half-sleeve includes a second semi-circular body and a second fixed connecting plate integrally formed with the second semi-circular body; Two first fixed connecting plates are symmetrically arranged at both ends of the first semi-circular body, and two second fixed connecting plates are symmetrically arranged at both ends of the second semi-circular body; The first fixed connecting plate and the second fixed connecting plate are respectively provided with a first bolt hole and a second bolt hole, and a fastening connection is achieved by passing a high-strength bolt through the first bolt hole and the second bolt hole; A rubber gasket is also provided between the assembled sleeve and the carbon fiber cloth winding layer to enhance the friction between the sleeve and the carbon fiber cloth winding layer and prevent stress concentration. The rubber gasket includes a middle sleeve, an upper sleeve, and a lower sleeve; The intermediate sleeve is cylindrical; The upper sleeve includes an upper fixed plate and an upper rotating plate, and the upper rotating plate can rotate relative to the upper fixed plate; The lower sleeve includes a lower fixed plate and a lower rotating plate, and the lower rotating plate can rotate relative to the lower fixed plate; The upper fixing plate and the lower fixing plate are fixedly connected to the upper and lower ends of the intermediate sleeve; In the initial state, the lower rotating plate hangs down naturally under gravity. When it is put on from above the PHC pipe pile, the rubber pad sleeve lower rotating plate automatically adheres to the outer wall of the pipe pile under gravity. The upper rotating plate rotates due to contact force during the insertion process and eventually adheres to the outer wall of the pipe pile. Two upper fixing plates are arranged opposite each other, and two upper rotating plates are arranged opposite each other between the two upper fixing plates; Two lower fixing plates are arranged opposite each other, and two lower rotating plates are arranged opposite each other between the two lower fixing plates; Magnetic blocks are provided at the corners above the two upper rotating plates and at the corners below the two lower rotating plates. The magnetic blocks attract each other through opposite magnetic poles. In a vertical position, the two lower rotating plates naturally droop under the action of gravity, overcoming the attraction of the magnetic blocks, ensuring smooth insertion into the pipe pile. Meanwhile, the upper end of the upper rotating plate remains closed due to the attraction of the magnetic blocks. As the rubber pad moves down and contacts the outer wall of the pipe pile, it is separated by force and rotates to the fitting position.

2. The offshore photovoltaic PHC pipe pile frost heave damage reinforcement device according to claim 1, characterized in that, The first half-sleeve is also provided with first prestressed anchor plates at both ends of its axial direction; The second half-sleeve is also provided with second prestressed anchor plates at both ends of its axial direction; Both the first prestressed end plate and the second prestressed end plate at both ends are provided with end plate through holes; Prestressed steel strands are inserted into the through hole, and initial radial pressure is applied to the assembled sleeve by tensioning the prestressed steel strands. After tensioning, the prestressed steel strand is anchored to the first prestressed anchor plate or the second prestressed anchor plate by a first anchor provided at its end.

3. The offshore photovoltaic PHC pipe pile frost heave damage reinforcement device according to claim 2, characterized in that, The first half-sleeve also includes a first reinforcing rib plate fixedly disposed on the first semi-circular body; The second half-sleeve also includes a second reinforcing rib plate fixedly disposed on the second semi-circular body; The first reinforcing ribs are evenly arranged along the radial outer side of the first semi-circular body. The second reinforcing ribs are evenly arranged along the radial outer side of the second semi-circular body.

4. The offshore photovoltaic PHC pipe pile frost heave damage reinforcement device according to claim 3, characterized in that, The first and second reinforcing ribs are also provided with rib through holes for the prestressed steel strands to pass through sequentially.

5. The device for reinforcing marine photovoltaic PHC pipe piles against frost heave damage according to claim 1, characterized in that, It also includes an anti-pull-out device; The anti-pull-out device includes an anti-pull-out pull bracket; One end of the anti-pull-out bracket is hinged to the seabed surface, and the other end is hinged to the high-strength bolt; The anti-pull-out bracket includes a long support rod, a short support rod, and a hinge seat; The long support pole and the short support pole are hinged together at the ends near the seabed by hinge seats fixedly installed on the seabed. The ends of the long support rod and the short support rod furthest from the seabed are respectively hinged to different high-strength bolts to form a triangular support structure, which restricts the rotation and pull-out of the bolts under extreme loads.

6. The device for reinforcing marine photovoltaic PHC pipe piles against frost heave damage according to claim 5, characterized in that, The anti-pull-out device also includes a first inclined strand and a second inclined strand; One end of the first inclined strand is anchored to the first fixed connecting plate, and the other end passes through the second fixed connecting plate and is anchored to a fixed anchor point on the seabed. One end of the second inclined strand is anchored to the second fixed connecting plate, and the other end passes through the first fixed connecting plate and is anchored to symmetrical fixed anchor points on the seabed.

7. The offshore photovoltaic PHC pipe pile frost heave damage reinforcement device according to claim 6, characterized in that, The first and second inclined strands are respectively anchored to the first and second fixed connecting plates by second anchors fixed at their ends; Both the first fixed connecting plate and the second fixed connecting plate are provided with anchor grooves that cooperate with the second anchor.

8. The offshore photovoltaic PHC pipe pile frost heave damage reinforcement device according to claim 7, characterized in that, The second anchor is a semi-ellipsoidal structure, and its long axis end is fixedly connected to the first or second inclined strand; The shape of the anchor groove matches the shape of the second anchor to ensure a tight fit during anchoring and prevent loosening; When vertical misalignment occurs between the first half-sleeve and the second half-sleeve, the second anchor generates a wedge-tightening effect in the anchor groove. The curved surface of the semi-ellipsoidal structure is squeezed against the inner wall of the anchor groove, converting part of the tension of the first or second inclined strand into radial locking force and restoring force.

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