Preset connecting structure for bailey beam and cross beam of offshore trestle and construction method

Abstract

The invention discloses a preset connecting structure for a bailey beam and a cross beam of an offshore trestle. The preset connecting structure comprises a main body assembly, four mounting assemblies, a plurality of positioning assemblies and a plurality of stabilizing assemblies. The construction method of the preset connecting structure for the bailey beam and the cross beam of the offshore trestle comprises the following steps that S1, bridge pile construction is conducted; s2, supporting part assembling; s3, the bailey beam is installed; s4, the panels and the guardrails are installed; s5, system deployment, operation and maintenance; when the positioning assembly and the insertion block deviate towards one side, the rotating plate is forced to extrude the inflatable bag, air enters the through block through the air pipe, the sliding block and the triangular ejection block are pushed to slide upwards, the triangular ejection block pushes the inclined face of the triangular side block, the insertion block is reset towards the center position, automatic deviation correction is achieved, and therefore the insertion block can be accurately assembled at the corresponding position; the problem that components are difficult to align under the sea stormy wave environment is solved, and uneven structure stress caused by installation dislocation of the bailey beams is avoided.

Description

Technical Field

[0001] This invention relates to the field of offshore pier technology, and in particular to a pre-designed connection structure and construction method for Bailey beams and crossbeams of offshore piers. Background Technology

[0002] In the field of marine engineering construction, offshore piers serve as important temporary passages and work platforms, and their application scenarios continue to expand. With the advancement of infrastructure construction in coastal areas, the construction demand for projects such as cross-sea bridges, port terminals, and offshore wind power is increasing. These projects often need to cross vast sea areas, and offshore piers can provide reliable support for the transportation of construction personnel, machinery, equipment, and materials, facilitating the construction and efficient advancement of modular construction systems.

[0003] Among them, Bailey bridge beams, as the key core of the trestle bridge's load-bearing structure, are currently positioned using two main methods during the installation process: traditional manual positioning and mechanically assisted positioning. Manual positioning relies on construction workers on-site to manually adjust the spatial position of the Bailey bridge beams using visual observation and handheld measuring tools to align them with the pre-set connection structures on the crossbeams. Mechanically assisted positioning involves using ordinary lifting equipment to hoist the Bailey bridge beams, employing simple distance and leveling tools for approximate positioning, followed by manual fine-tuning to finally complete the component connection.

[0004] However, due to the complex marine construction environment and the continuous presence of natural factors such as wind, waves, and swells, the above positioning methods are prone to causing the Bailey beams to shift in position during hoisting and docking. Moreover, the adjustment methods are slow to respond and difficult to correct deviations quickly and accurately, which consumes a lot of manpower and time costs and also affects the assembly effect of subsequent connection structures.

[0005] Accordingly, this application proposes a pre-designed connection structure and construction method for Bailey beams and crossbeams of a marine trestle bridge. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a pre-designed connection structure and construction method for Bailey beams and crossbeams of offshore piers.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A pre-designed connection structure for Bailey beams and crossbeams of a sea pier includes a main component, four sets of installation components, several sets of positioning components, and several sets of stabilizing components. The main component includes four sets of support sections, two sets of guardrails, four crossbeams, several sets of Bailey beams, and steel panel assemblies. The steel panel assemblies are fixedly installed on the several sets of Bailey beams via I-beams. The two sets of guardrails are respectively fixedly installed on the steel panel assemblies, and the several sets of Bailey beams are respectively located above the support sections. The support includes two bridge piles, two diagonal braces, and a horizontal brace. The horizontal brace is fixedly installed between the two bridge piles. One end of each of the two diagonal braces is fixedly connected to the horizontal brace, and the other end is fixedly connected to the crossbeam. The installation components are used for convenient and quick installation of Bailey beams; The positioning component is used to quickly locate the installation position and ensure installation accuracy; The stabilizing components are used to ensure the stability of the bridge piles and provide tilt warnings.

[0008] Preferably, the crossbeam has several slots, and mounting brackets are fixedly connected to the inner walls on both sides of the slots. Several inserts are fixedly connected to the Bailey beam. Each insert has an embedding groove, and recesses are provided on both sides of the embedding groove. Triangular side blocks are fixedly connected to both sides of each insert, and a rotating roller is rotatably connected to the tip of each triangular side block.

[0009] Preferably, the positioning assembly includes two rotating plates, two inflatable bladders, four air tubes, four connecting blocks, four sliders, and two triangular apex blocks; the two rotating plates are rotatably connected in the slots, the two inflatable bladders are respectively mounted on two mounting brackets, and the four air tubes are connected in pairs below the two inflatable bladders.

[0010] Preferably, a torsion spring is provided at the connection between the rotating plate and the slot, the four through blocks are respectively connected to the four air pipes, the four sliders are respectively slidably connected to the four through blocks, the two triangular apex blocks are respectively fixedly connected to the two sliders, the insert block is provided in the slot, and the rotating roller is attached to the surface of the rotating plate.

[0011] Preferably, the installation assembly includes a rotating wheel, a rotating rod, a limiting plate, a cylinder, several sets of groove blocks, and a receiving frame; the rotating rod is rotatably connected inside the crossbeam, the several sets of groove blocks are respectively fixedly connected to both sides of the rotating rod, and the several sets of groove blocks are respectively slidably connected in the recessed area of ​​the embedded groove.

[0012] Preferably, the limiting plate is fixedly connected to one end of the rotating rod, the receiving frame is fixedly installed on one side of the crossbeam, the cylinder is fixedly installed on the receiving frame, and the output end of the cylinder is rotatably connected to the limiting plate.

[0013] Preferably, the stabilizing component includes a net cover cylinder, a connecting frame, ropes, a weight ball, several ring plates, a thin inner wall area, and several sensors; the several ring plates are respectively fixedly connected inside the bridge pile, the connecting frame is fixedly connected to the bridge pile, and the net cover cylinder is located on the outside of the bridge pile.

[0014] Preferably, the net cover cylinder is fixedly welded to the connecting frame, the rope is fixedly connected to the center of the connecting frame, the weight ball is fixedly connected to one end of the rope, and several sensors are respectively fixedly installed on the inner wall of the ring plate, with the thin inner wall area located on the inner wall below the bridge pile.

[0015] A construction method for a pre-designed connection structure between Bailey beams and crossbeams of a marine pier includes the following steps: S1, Bridge Piling Construction A dual-mode pile driving system covering water depths of 0-20m is adopted. In shallow water areas, pile driving is carried out by crawler cranes in conjunction with vibratory hammers, with a work efficiency of 15m / d. In deep water areas, a pile driving vessel equipped with a Beidou-RTK positioning system is used for precise positioning, increasing the work efficiency to 30m / d. This allows the bridge piles with built-in ring plates and thin inner walls at the bottom to be smoothly driven into the soft strata, ensuring that the piles are firmly embedded and providing stable support for subsequent structures. S2, Support assembly Relying on the horizontal bracing and diagonal bracing assembly system in the rapid prototyping technology of prefabricated structures, the horizontal bracing is first fixed horizontally between two adjacent bridge piles to achieve the horizontal connection of the bridge piles; then, one end of each of the two diagonal bracings is hinged to the horizontal bracing, and the other end is connected to the crossbeam. The horizontality of the crossbeam is adjusted by the main beam leveling device to offset the pile top elevation deviation and build a stable triangular support system. S3, Bailey beam installation First, the positioning component guides the insert block at the bottom of the Bailey beam to align with the slot of the crossbeam and insert it. The triangular side blocks on both sides of the insert block, together with the rotating roller, rotating plate and other components, realize automatic correction. Then, the rotating wheel of the installation component is rotated so that the rotating rod drives the slot block to align and embed into the slot. The cylinder is activated to push the slot block to snap and fix it, thus completing the quick and stable connection between the Bailey beam and the crossbeam. S4. Panel and guardrail installation Corrosion-resistant and reusable UHPC steel panel assemblies are fixed piece by piece to the Bailey beams using I-beams to ensure that the panels are spliced ​​flat and the joints are tight. Then, guardrails are installed at the corresponding edges on both sides of the steel panels, and fasteners are used to achieve a firm connection between the guardrails and the steel panels, forming a safe and reliable trestle passage surface and protective structure. S5, System Deployment and Maintenance Stabilizing components are installed on the bridge piers, and erosion is prevented by netting and the tilt of the piers is monitored by sensors and drop balls. A smart scheduling and operation and maintenance system and a marine construction comprehensive support platform are deployed. Regular inspections are carried out using equipment such as drones and bridge inspection vehicles. In conjunction with a preventive maintenance system, defects are dealt with in a timely manner to ensure the long-term safe operation of the trestle bridge.

[0016] The present invention has the following beneficial effects: 1. By incorporating prefabricated rapid prototyping technology into the main components, and relying on the developed assembly system, the horizontal bracing and diagonal bracing are quickly and accurately assembled. The horizontal bracing connects two bridge piles to form a horizontal fixation, and the diagonal bracing connects the horizontal bracing at one end and the crossbeam at the other end to build a stable support system. Then, Bailey beams are set above the support, and steel panel assemblies are fixed to the Bailey beams through I-beams to form the trestle bridge passage surface. The guardrails are fixed to the steel panels to ensure passage safety.

[0017] Second, through the positioning component, when the Bailey beam is installed, the insert block is inserted into the slot. At this time, the triangular side block will drive the rotating roller to roll on the rotating plate and push the rotating plate. When the insert block deviates to one side, it will force the rotating plate to squeeze the air bladder, so that the gas enters the through block through the air pipe, pushing the slider and the triangular top block to slide upward. The triangular top block pushes the inclined surface of the triangular side block upward, so that the insert block is reset to the center position, realizing automatic correction. This allows the insert block to be accurately assembled in the corresponding position, solving the problem of difficult component alignment in the wind and waves at sea, and avoiding uneven structural stress caused by misalignment of the Bailey beam installation.

[0018] Third, by installing the components, after the insert block is fully inserted into the slot, the embedded slot and the rotating rod surface are in contact. By rotating the rotating wheel, the rotating rod is rotated 90 degrees, so that the slot block rotates and aligns with the recessed part of the embedded slot. Then, the cylinder pushes the limiting plate and the rotating rod to make the slot block embed into the recessed part of the embedded slot to form a snap-fit ​​limit, realizing the fixed connection between the Bailey beam and the crossbeam. There is no need for complicated welding or multiple sets of bolts to tighten, which solves the problem of cumbersome operation and time-consuming operation of traditional connection methods, and realizes the convenient and quick installation of Bailey beams.

[0019] Fourth, through the stabilizing components, when the bridge pile tilts or shifts due to strong tides, rapid currents, or changes in strata, the connecting frame shifts synchronously with the bridge pile. One end of the rope moves with the connecting frame, while the weighted ball remains vertical under gravity, causing the rope to shift under tension. At this time, sensors distributed around the weighted ball capture the magnitude and direction of the ball's shift in real time, converting the physical displacement signal into tilt data and sending it to the control system. This triggers an alarm, ensuring that staff can promptly detect the tilting state of the bridge pile and take targeted reinforcement measures. Simultaneously, the net cover prevents water flow from scouring the strata around the bridge pile, reducing the impact of scouring and silting on the pile's bearing capacity. The ring plate enhances the structural strength of the bridge pile itself, improving its bearing capacity. The thin inner wall area reduces pile driving resistance, improving pile penetration efficiency and embedment effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the pre-designed connection structure between Bailey beams and crossbeams of a marine pier proposed in this invention. Figure 2 This is a schematic diagram of the connection structure of the components below the Bailey beam in a pre-designed connection structure between the Bailey beam and the crossbeam of a marine pier, as proposed in this invention. Figure 3 for Figure 2 Enlarged diagram of point A in the diagram; Figure 4 This is a schematic diagram of the connection structure of the pre-set connection structure support and some components of the Bailey beam and crossbeam of a marine pier proposed in this invention. Figure 5 for Figure 4 Enlarged diagram of point A in the diagram; Figure 6 This is an internal sectional view of the slotted pre-designed connection structure between the Bailey beam and the crossbeam of a marine pier proposed in this invention. Figure 7 This is a schematic diagram of the connection structure of components such as the wheel, groove block, slider, and inflatable bladder in the pre-set connection structure between the Bailey beam and the crossbeam of the offshore pier proposed in this invention. Figure 8 This is an internal sectional view of the pre-designed connection structure of the Bailey beam and crossbeam of a marine trestle bridge, including the mesh cover and bridge piles, as proposed in this invention. Figure 9 for Figure 8 Enlarged diagram of point A in the diagram.

[0021] In the diagram: 1. Bridge pile; 2. Steel panel; 3. Guardrail; 4. Netting cylinder; 5. Horizontal bracing; 6. Diagonal bracing; 7. Bailey beam; 8. Insert block; 9. Triangular side block; 10. Rotating roller; 11. Embedded groove; 12. Thin inner wall area; 13. Crossbeam; 14. Slot; 15. Rotating wheel; 16. Rotating plate; 17. Rotating rod; 18. Limiting plate; 19. Support frame; 20. Cylinder; 21. Mounting frame; 22. Inflatable bag; 23. Air pipe; 24. Groove block; 25. Slider; 26. Triangular top block; 27. Groove block; 28. Ring plate; 29. ​​Connecting frame; 30. Sensor; 31. Rope; 32. Drop ball. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] Example 1: Reference Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7A pre-designed connection structure and construction method for Bailey beams and crossbeams of a sea pier is disclosed, comprising a main component, four sets of installation components, several sets of positioning components, and several sets of stabilizing components. The main component includes four sets of support sections, two sets of guardrails 3, four crossbeams 13, several sets of Bailey beams 7, and steel panel assembly 2. The steel panel assembly 2 is fixedly installed on the several sets of Bailey beams 7 via I-beams. The steel panel assembly 2 is made of corrosion-resistant and reusable UHPC material to form the passage surface of the pier, while improving durability and turnover rate. The two sets of guardrails 3 are fixedly installed on the steel panel assembly 2 to ensure passage safety. The several sets of Bailey beams 7 are respectively located above the support sections to provide installation foundation and load-bearing support for the steel panel assembly 2. The I-beams are used to fix and connect the steel panel assembly 2 and the Bailey beams 7 to transfer load. The support unit includes two bridge piles 1, two diagonal braces 6, and a horizontal bracing 5. The horizontal bracing 5 is fixedly installed between the two bridge piles 1 to achieve lateral fixation of the two bridge piles 1 and form a stable support unit. One end of each of the two diagonal braces 6 is fixedly connected to the horizontal bracing 5, and the other end is fixedly connected to the crossbeam 13 to construct a stable triangular support system and distribute the load transmitted by the crossbeam 13. The bridge pile 1, as the core support component of the trestle bridge, transmits the overall load to the ground. It has an inner ring plate 28. Compared with the cross diaphragm, the inner ring plate of the pile can increase the bearing capacity by 15.2% and enhance the bearing performance of the pile. The inner wall of the lower part of the bridge pile 1 has a thin inner wall area 12. The wall thickness is reduced by optimization to facilitate the embedding of the pile into the ground, reduce the pile driving resistance, and improve the embedment effect. The installation components are designed for easy and quick installation of Bailey beam 7; The positioning component is used to quickly locate the installation position and ensure installation accuracy; The stabilizing component is used to ensure the stability of bridge pile 1 and to provide tilt warning.

[0024] The crossbeam 13 has several slots 14, which provide insertion and installation space for the insert blocks 8 of the Bailey beam 7. Mounting brackets 21 are fixedly connected to the inner walls on both sides of the slots 14 for installing related components of the positioning assembly. Several insert blocks 8 are fixedly connected to the Bailey beam 7. The Bailey beam 7 and the crossbeam 13 are initially connected by cooperating with the slots 14. The insert blocks 8 have an embedding groove 11. The embedding groove 11 and the recesses on both sides provide a suitable installation base for the fixing structure of the mounting assembly. Triangular side blocks 9 are fixedly connected to both sides of the insert blocks 8 for automatic correction with the positioning assembly. The tip of the triangular side block 9 is rotatably connected to a roller 10, which can reduce the frictional resistance between the insert blocks 8 and the related components of the positioning assembly when the insert blocks 8 are inserted into the slots 14, and ensure that the insert blocks 8 are inserted smoothly.

[0025] The positioning assembly includes two rotating plates 16, two inflatable bladders 22, four air pipes 23, four through blocks 24, four sliders 25, and two triangular top blocks 26. The two rotating plates 16 are rotatably connected in the slot 14. The rotating plates 16 are used to receive the rolling thrust of the rotating roller 10 and squeeze the inflatable bladders 22, providing support for the generation of correction power. A torsion spring is provided at the connection between the rotating plates 16 and the slot 14. The torsion spring can reset the rotating plates 16 after the Bailey frame 7 is removed. The two inflatable bladders 22 are respectively installed on two mounting brackets 21. The inflatable bladders 22 release gas under pressure, converting mechanical thrust into gas pressure, which provides power for the movement of the sliders 25. The four air pipes 23 are connected in pairs below the two inflatable bladders 22. The air pipes 23 are used to transport the gas released by the inflatable bladders 22 to realize the transmission of pressure.

[0026] Four through blocks 24 are respectively connected to four air pipes 23. The through blocks 24 provide a space for gas to be contained and provide a sliding track for the sliders 25. The four sliders 25 are slidably connected to the four through blocks 24. Under the action of gas pressure, the sliders 25 drive the triangular apex blocks 26 to move, realizing the transmission and conversion of force. Two triangular apex blocks 26 are respectively fixedly connected to two sliders 25. The triangular apex blocks 26 convert the vertical movement into a lateral correction force by pushing the inclined surface of the triangular side block 9, pushing the insert block 8 to reset. The insert block 8 is set in the slot 14. The rotating roller 10 is attached to the surface of the rotating plate 16. The rotating roller 10 reduces the frictional resistance between the insert block 8 and the rotating plate 16 when the insert block 8 is inserted, ensuring that the insert block 8 moves smoothly.

[0027] In this embodiment, when the Bailey beam 7 is installed, the insert block 8 is inserted into the slot 14. At this time, the triangular side block 9 will drive the rotating roller 10 to roll on the rotating plate 16 and push the rotating plate 16. When the insert block 8 shifts to one side, it will force the rotating plate 16 to squeeze the air bag 22, so that the gas enters the through block 24 through the air pipe 23, pushing the slider 25 and the triangular top block 26 to slide upward. The triangular top block 26 pushes the inclined surface of the triangular side block 9 upward, so that the insert block 8 is reset to the center position, realizing automatic correction. This allows the insert block 8 to be accurately assembled in the corresponding position, solving the problem of difficult component alignment in the wind and waves at sea, and avoiding uneven structural stress caused by misalignment of the Bailey beam 7 installation.

[0028] Example 2: Unlike Example 1, referring to Figure 2 , Figure 5 , Figure 6 and Figure 7 This embodiment also has the following further features: The mounting components include a rotating wheel 15, a rotating rod 17, a limiting plate 18, a cylinder 20, several sets of slotted blocks 27, and a receiving frame 19. The rotating rod 17 is rotatably connected to the crossbeam 13 and serves as the core transmission component, driving the slotted blocks 27 to rotate and move. Several sets of slotted blocks 27 are fixedly connected to both sides of the rotating rod 17, and the Bailey beam 7 and the crossbeam 13 are locked together by embedding into the recessed part of the embedding groove 11. Several sets of slotted blocks 27 are slidably connected in the recessed part of the embedding groove 11 to ensure the stability of the connection.

[0029] The limiting plate 18 is fixedly connected to one end of the rotating rod 17 to receive the thrust of the cylinder 20 and drive the rotating rod 17 to move, while limiting the range of movement of the rotating rod 17. The receiving frame 19 is fixedly installed on one side of the crossbeam 13 to provide stable installation support for the cylinder 20. The cylinder 20 is fixedly installed on the receiving frame 19 as a power source to provide stable thrust for the movement of the rotating rod 17. The output end of the cylinder 20 is rotatably connected to the limiting plate 18 to ensure that the output end of the cylinder 20 can rotate synchronously when the rotating rod 17 rotates. The rotating wheel 15 is used to manually drive the rotating rod 17 to rotate, which makes it convenient for the operator to control the direction of the rotating rod 17 and the groove block 27, so that the groove block 27 is accurately aligned with the recess of the groove 11. This component is compatible with rapid prototyping technology for prefabricated structures. Through the synergistic effect of mechanical transmission and power drive, it enables the rapid installation and fixation of Bailey beam 7 without the need for complex welding or multiple sets of bolts. This solves the problems of cumbersome and time-consuming operation in traditional connection methods, improves the construction efficiency of the pier, adapts to the modular construction requirements in strong tide and fast current environments, provides technical support for the efficient construction of 15km-class offshore piers, and ensures construction efficiency of 15m / d in shallow water areas and 30m / d in deep water areas.

[0030] In this embodiment, after the insert 8 is fully inserted into the slot 14, the embedded slot 11 and the surface of the rotating rod 17 are in contact. By rotating the rotating wheel 15, the rotating rod 17 is rotated 90 degrees, thereby causing the slot block 27 to rotate and align with the recess of the embedded slot 11. Then, the cylinder 20 pushes the limiting plate 18 and the rotating rod 17 to make the slot block 27 embed into the recess of the embedded slot 11 to form a snap-fit ​​limit, thereby realizing the fixed connection between the Bailey beam 7 and the crossbeam 13. This eliminates the need for complex welding or multiple sets of bolts, solving the problem of cumbersome and time-consuming operation in traditional connection methods, and realizing the convenient and quick installation of the Bailey beam 7.

[0031] Example 3: Reference Figure 1 , Figure 4 , Figure 8 and Figure 9 Compared to Embodiment 1 and Embodiment 2, in this embodiment: The stabilizing components include a net cover cylinder 4, a connecting frame 29, a rope 31, a weight ball 32, several ring plates 28, a thin inner wall region 12, and several sensors 30. The ring plates 28 are fixedly connected inside the bridge pile 1, serving as an internal reinforcement structure for the bridge pile 1. Compared with the cross diaphragm, they can increase the bearing capacity of the pile by 15.2%, effectively enhancing the bearing performance of the bridge pile 1 in soft strata and reducing the risk of settlement. The connecting frame 29 is fixedly connected to the bridge pile 1, providing a stable installation carrier for the net cover cylinder 4 and the rope 31, and realizing a stable connection between each component and the bridge pile 1. The net cover cylinder 4 is located on the outside of the bridge pile 1 and is fixedly welded to the connecting frame 29. It is used to block the water flow from scouring the strata around the bridge pile 1, reducing the impact of scouring and silting under strong tides and rapid currents, and preventing the pile foundation from being hollowed out and causing instability.

[0032] Rope 31 is fixedly connected to the center of connecting frame 29, connecting connecting frame 29 and weight ball 32, transmitting the gravity traction of weight ball 32. Weight ball 32 is fixedly connected to one end of rope 31 and always remains vertical under gravity, serving as a sensing component for pile tilting. When bridge pile 1 tilts, it causes rope 31 to deflect. Several sensors 30 are fixedly installed on the inner wall of ring plate 28 to capture the amplitude and direction of the deflection of weight ball 32 in real time, converting physical displacement signals into tilt data and sending them to the control system to trigger the alarm function and realize tilt warning. Thin inner wall area 12 is located on the inner wall below bridge pile 1. The wall thickness below the embedment point elevation is optimized and reduced to reduce pile driving resistance. Combined with the dual-mode pile driving system, it improves the efficiency and embedment effect of bridge pile 1 in the soil, adapting to the modular construction requirements of water depths of 0-20m. This component integrates external protection, structural reinforcement, and monitoring and early warning functions, adapting to strong tide and fast current environments, and solving the problem of immature active operation and maintenance control technology for temporary structures of trestle bridges.

[0033] In this embodiment, when the bridge pile 1 tilts due to strong tides, rapid currents, or changes in strata, the connecting frame 29 tilts synchronously with the bridge pile 1, and one end of the rope 31 moves with the connecting frame 29. Meanwhile, the weighted ball 32 remains vertical due to gravity, causing the rope 31 to be pulled and deflected. At this time, the sensors 30 distributed around the weighted ball 32 capture the magnitude and direction of the weighted ball 32's tilt in real time, converting the physical displacement signal into tilt data and sending it to the control system. This causes the control system to issue an alarm, ensuring that staff can promptly detect the tilting state of the bridge pile 1 and take targeted reinforcement measures. At the same time, the net cover 4 blocks the water flow from scouring the strata around the bridge pile 1, reducing the impact of scouring and silting on the pile's bearing capacity. The ring plate 28 enhances the structural strength of the bridge pile 1, thereby increasing its bearing capacity. The thin inner wall area 12 reduces the resistance to pile driving, improving the pile's soil penetration efficiency and embedment effect.

[0034] A construction method for a pre-designed connection structure between Bailey beams and crossbeams of a marine pier includes the following steps: S1, Bridge Piling Construction A dual-mode pile driving system covering water depths of 0-20m is adopted. In shallow water areas, pile driving is carried out by crawler cranes in conjunction with vibratory hammers, with a work efficiency of 15m / d. In deep water areas, a pile driving vessel equipped with a Beidou-RTK positioning system is used for precise positioning, increasing the work efficiency to 30m / d. The bridge pile 1 with an internal ring plate 28 and a thin inner wall area 12 at the bottom is smoothly driven into the soft stratum, ensuring that the pile body is firmly embedded and providing stable support for subsequent structures. S2, Support assembly Relying on the horizontal bracing and diagonal bracing assembly system in the rapid prototyping technology of prefabricated structures, the horizontal bracing 5 is first fixed horizontally between two adjacent bridge piles 1 to achieve the horizontal connection of the bridge piles 1; then, one end of each of the two diagonal braces 6 is hinged to the horizontal bracing 5, and the other end is connected to the crossbeam 13. The horizontality of the crossbeam 13 is adjusted by the main beam leveling device to offset the pile top elevation deviation and build a stable triangular support system. S3, Bailey beam installation First, the positioning component guides the insertion block 8 at the bottom of the Bailey beam 7 to align with the slot 14 of the crossbeam 13 and insert it. The triangular side blocks 9 on both sides of the insertion block 8, together with the rotating roller 10, rotating plate 16 and other components, realize automatic correction. Then, the rotating wheel 15 of the installation component is rotated so that the rotating rod 17 drives the slot block 27 to align and embed into the slot 11. The cylinder 20 is activated to push the slot block 27 to snap and fix it, thus completing the rapid and stable connection between the Bailey beam 7 and the crossbeam 13. S4. Panel and guardrail installation The corrosion-resistant and reusable UHPC steel panel 2 is fixed piece by piece on the Bailey beam 7 using I-beams to ensure that the panels are spliced ​​flat and the joints are tight. Then, guardrails 3 are installed on both sides of the steel panel 2, and the guardrails 3 are firmly connected to the steel panel 2 with fasteners to form a safe and reliable trestle passage surface and protection structure. S5, System Deployment and Maintenance Stabilizing components are installed on bridge pile 1, and erosion is prevented by net cover cylinder 4, and the tilt of the pile is monitored by sensor 30 and drop ball 32. A smart scheduling and operation and maintenance system and a marine construction comprehensive support platform are deployed. Regular inspections are carried out using equipment such as drones and bridge inspection vehicles, and defects are dealt with in a timely manner in conjunction with a preventive maintenance system to ensure the long-term safe operation of the trestle bridge.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pre-designed connection structure between Bailey beams and crossbeams of a sea pier, characterized in that, It includes a main component, four sets of installation components, several sets of positioning components and several sets of stabilizing components. The main component includes four sets of support parts, two sets of guardrails (3), four crossbeams (13), several sets of Bailey beams (7) and steel panel assembly (2). The steel panel assembly (2) is fixedly installed on several sets of Bailey beams (7) by I-beams. The two sets of guardrails (3) are respectively fixedly installed on the steel panel (2). The several sets of Bailey beams (7) are respectively located above the support parts. The support includes two bridge piles (1), two diagonal braces (6), and a horizontal brace (5). The horizontal brace (5) is fixedly installed between the two bridge piles (1). One end of each of the two diagonal braces (6) is fixedly connected to the horizontal brace (5), and the other end is fixedly connected to the crossbeam (13). The installation components are used for convenient and quick installation of Bailey beams (7); The positioning component is used to quickly locate the installation position and ensure installation accuracy; The stabilizing component is used to ensure the stability of the bridge pile (1) and to provide tilt warning.

2. The pre-designed connection structure between Bailey beams and crossbeams of a sea pier according to claim 1, characterized in that, The crossbeam (13) has several slots (14), and mounting brackets (21) are fixedly connected to the inner walls on both sides of the slots (14). Several inserts (8) are fixedly connected to the Bailey beam (7). The inserts (8) have embedded grooves (11), and recesses are provided on both sides of the embedded grooves (11). Triangular side blocks (9) are fixedly connected to both sides of the inserts (8), and a rotating roller (10) is rotatably connected to the tip of the triangular side blocks (9).

3. The pre-designed connection structure between Bailey beams and crossbeams of a sea pier according to claim 2, characterized in that, The positioning assembly includes two rotating plates (16), two inflatable bladders (22), four air tubes (23), four through blocks (24), four sliders (25), and two triangular apex blocks (26); the two rotating plates (16) are rotatably connected in the slots (14), the two inflatable bladders (22) are respectively mounted on two mounting brackets (21), and the four air tubes (23) are connected in pairs below the two inflatable bladders (22).

4. The pre-designed connection structure between Bailey beams and crossbeams of a sea pier according to claim 3, characterized in that, A torsion spring is provided at the connection between the rotating plate (16) and the slot (14). The four through blocks (24) are respectively connected to the four air pipes (23). The four sliders (25) are respectively slidably connected to the four through blocks (24). The two triangular top blocks (26) are respectively fixedly connected to the two sliders (25). The insert block (8) is located in the slot (14). The rotating roller (10) is attached to the surface of the rotating plate (16).

5. The pre-designed connection structure between Bailey beams and crossbeams of a sea pier according to claim 2, characterized in that, The installation assembly includes a rotating wheel (15), a rotating rod (17), a limiting plate (18), a cylinder (20), several sets of slot blocks (27), and a receiving frame (19); the rotating rod (17) is rotatably connected to the crossbeam (13), several sets of slot blocks (27) are respectively fixedly connected to both sides of the rotating rod (17), and several sets of slot blocks (27) are respectively slidably connected to the recess of the embedded groove (11).

6. The pre-designed connection structure between Bailey beams and crossbeams of a sea pier according to claim 5, characterized in that, The limiting plate (18) is fixedly connected to one end of the rotating rod (17), the receiving frame (19) is fixedly installed on one side of the crossbeam (13), the cylinder (20) is fixedly installed on the receiving frame (19), and the output end of the cylinder (20) is rotatably connected to the limiting plate (18).

7. The pre-designed connection structure between Bailey beams and crossbeams of a sea pier according to claim 1, characterized in that, The stabilizing components include a net cover cylinder (4), a connecting frame (29), a rope (31), a weight ball (32), several ring plates (28), a thin inner wall area (12), and several sensors (30); several ring plates (28) are fixedly connected to the bridge pile (1), the connecting frame (29) is fixedly connected to the bridge pile (1), and the net cover cylinder (4) is located on the outside of the bridge pile (1).

8. The pre-designed connection structure between Bailey beams and crossbeams of a sea pier according to claim 7, characterized in that, The net cover cylinder (4) is fixedly welded to the connecting frame (29), the rope (31) is fixedly connected to the center of the connecting frame (29), the drop ball (32) is fixedly connected to one end of the rope (31), and several sensors (30) are respectively fixedly installed on the inner wall of the ring plate (28). The thin inner wall area (12) is located on the inner wall below the bridge pile (1).

9. A construction method for a pre-designed connection structure between Bailey beams and crossbeams of a marine pier as described in any one of claims 1-8, characterized in that, Includes the following steps: S1, Bridge Piling Construction A dual-mode pile driving system covering water depths of 0-20m is adopted. In shallow water areas, pile driving operations are carried out by crawler cranes in conjunction with vibratory hammers, with a work efficiency of 15m / d. In deep water areas, the pile driving vessel is equipped with a Beidou-RTK positioning system for precise positioning, increasing the work efficiency to 30m / d. The bridge pile (1) with an internal ring plate (28) and a thin inner wall area (12) at the bottom is smoothly driven into the soft stratum, ensuring that the pile body is firmly embedded and providing stable support for subsequent structures. S2, Support assembly Based on the horizontal bracing assembly system in the rapid prototyping technology of prefabricated structure, the horizontal bracing (5) is first fixed horizontally between two adjacent bridge piles (1) to achieve the horizontal connection of the bridge piles (1); then, one end of the two diagonal braces (6) is hinged to the horizontal bracing (5) respectively, and the other end is connected to the crossbeam (13). The horizontality of the crossbeam (13) is adjusted by the main beam leveling device to offset the pile top elevation deviation and build a stable triangular support system. S3, Bailey beam installation First, the positioning component guides the insert (8) at the bottom of the Bailey beam (7) to align with the slot (14) of the crossbeam (13) and insert it. The triangular side blocks (9) on both sides of the insert (8) work with the roller (10), rotating plate (16) and other components to achieve automatic correction. Then, the rotating wheel (15) of the installation component is rotated so that the rotating rod (17) drives the slot block (27) to align with the embedded slot (11). The cylinder (20) is started to push the slot block (27) to snap and fix it, thus completing the rapid and stable connection between the Bailey beam (7) and the crossbeam (13). S4. Panel and guardrail installation The corrosion-resistant and reusable UHPC steel panel assembly (2) is fixed piece by piece on the Bailey beam (7) through the I-beam to ensure that the panel splicing is flat and the joints are tight; then guardrails (3) are installed on the two sides of the steel panel (2) respectively, and the guardrails (3) and the steel panel (2) are firmly connected by fasteners to form a safe and reliable trestle passage surface and protection structure. S5, System Deployment and Maintenance Stabilizing components are installed on the bridge piles (1), and the pile tilt is monitored by the net cover cylinder (4) to prevent erosion and the sensor (30) in conjunction with the drop ball (32). A smart scheduling and maintenance system and a marine construction comprehensive support platform are deployed. Regular inspections are carried out using equipment such as drones and bridge inspection vehicles. Diseases are dealt with in a timely manner in conjunction with the preventive maintenance system to ensure the long-term safe operation of the trestle bridge.

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