Bridge on bridge field splicing equipment and process for heavy vehicle crossing bridge

Abstract

The application relates to the field of on-bridge bridge field splicing, and particularly discloses an on-bridge bridge field splicing device and process for heavy vehicles to pass through a bridge, which solves the problems of poor alignment accuracy, insufficient flatness, uneven stress, hidden dangers, long construction period, easy loosening and damage of components, and low steel reuse rate of manual assembly of the existing temporary steel bridge, and the following scheme is proposed, which comprises a middle steel longitudinal beam, side steel longitudinal beams, a rib plate, a frame, an I-shaped steel cross beam, a filler, a top plate, a manual hydraulic rod, a connecting block, a sliding seat, a rotating plate I, a push plate I, a layout assembly and a linkage assembly, the linkage assembly is used for driving the fillers on the sides of the adjacent I-shaped steel cross beams to slide close to each other and abut against each other when the sliding seat slides. The device can quickly, accurately and stably build a steel bridge for heavy vehicles to pass through a bridge on an existing bridge body, is convenient and flexible to combine and disassemble, can be reused for multiple times, and is good in economy.

Description

Technical Field

[0001] This invention relates to the field of bridge-on-bridge on-site splicing, and in particular to a bridge-on-bridge on-site splicing equipment and process for heavy vehicles crossing bridges. Background Technology

[0002] Existing aging concrete bridges generally suffer from insufficient beam load-bearing capacity, aging steel reinforcement, and concrete carbonization cracking, making them unable to meet the short-term passage requirements of heavy-load vehicles and military equipment. Therefore, temporary steel bridges need to be erected for reinforcement and passage. Traditional on-site splicing construction, involving manual assembly of I-beams and steel bridge decks, suffers from large misalignment of components and uneven splicing gaps, easily leading to misalignment and height differences. This results in substandard overall flatness of the steel bridge, uneven stress distribution and localized stress concentration during heavy-load passage, posing safety hazards. Furthermore, on-site manual docking and welding are time-consuming, and the short temporary passage window makes traditional construction cycles unsuitable for short-term emergency passage needs. In addition, manual splicing has poor stability, insufficient component tightness, and is prone to loosening and deformation later. The lack of standardized positioning constraints during construction also makes it easy to damage steel components during disassembly and assembly, significantly reducing steel recycling and reuse rates and increasing construction costs. Therefore, this paper proposes an on-site splicing equipment and process for heavy-vehicle bridges. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention proposes a bridge-on-bridge on-site splicing equipment and process for heavy vehicles crossing bridges. This solves the problems of poor alignment accuracy, insufficient flatness, uneven stress distribution, long construction period, easy loosening and damage of components, and low steel reuse rate in the manual assembly of existing temporary steel bridges.

[0004] To solve the above-mentioned technical problems, the basic technical solution proposed by this invention is as follows: A bridge-on-bridge splicing device for heavy vehicles crossing a bridge includes interlocking central steel longitudinal beams and side steel longitudinal beams. Supports are provided on the far sides of the side steel longitudinal beams at both ends. Stiffening plates are connected to the close sides of the central and side steel longitudinal beams on both sides. Multiple sets of frames are evenly spaced on each stiffening plate. Multiple I-beams are arranged parallel to each other and at equal intervals between the central and side steel longitudinal beams on both sides. The two ends of the I-beams are connected to the stiffening plates and are positioned between adjacent frames. Filler frames are symmetrically slidably mounted on both sides of the I-beams. Top plates are slidably mounted on the stiffening plates. Manual hydraulic rods connected to the top plates of adjacent side steel longitudinal beams are installed on the supports on both sides. A connecting block is bolted between the top plate on the central steel longitudinal beam and the side steel longitudinal beam. Each frame is provided with a sliding block that slides on the corresponding central steel longitudinal beam or side steel longitudinal beam. A rotating plate is rotatably connected between the sliding block and the top plate. A push plate is also connected to the sliding block. An arrangement component is provided on the sliding block. The arrangement component is used to drive the I-beams between adjacent frames to be centered and aligned when the top plate moves down. A linkage component is also provided on the I-beams. The linkage component is used to drive the filler frames on the adjacent I-beams to slide closer to each other and abut against each other when the sliding block slides. A reinforcing component is also provided between the central steel longitudinal beam, the side steel longitudinal beam and the support.

[0005] Preferably, the side-mounted steel longitudinal beams are sequentially fitted onto both ends of the central steel longitudinal beam, and the sequentially fitted central steel longitudinal beams and side-mounted steel longitudinal beams are symmetrically arranged on both sides and overlapped on the existing bridge. The two sides of the support are connected to the two ends of the central steel longitudinal beam with steel sleeves, and the two ends of the side-mounted steel longitudinal beams are correspondingly fitted onto the outer side of the adjacent steel sleeves. Bolt holes for installing bolts are also provided between the side-mounted steel longitudinal beams and the corresponding steel sleeves.

[0006] Preferably, each of the stiffening plates is connected to a sliding rod frame one at both ends, and the two ends of the top plate are slidably sleeved on the outside of the sliding rod frame one on both sides. Each frame is provided with a sliding rod frame two connected to the corresponding central steel longitudinal beam or side steel longitudinal beam, and the sliding seat is slidably sleeved on the outside of the sliding rod frame two.

[0007] Preferably, the arrangement assembly includes a guide seat, a slide rod, and a first inclined frame. The guide seat is connected to both sides of the I-beam crossbeam and overlaps the stiffening plate, and is located between adjacent frames. The slide rod is symmetrically arranged on both sides of each frame and passes through both sides of the frame. One end of the slide rod is connected to a limiting plate inside the frame, and the other end of the slide rod is connected to a top seat that fits and abuts against the guide seat. A tension spring sleeved on the outside of the slide rod is connected between the limiting plate and the inner wall of the frame. The first inclined frame is connected to the upper end of the top seat. The first push plate slides and abuts against the first inclined frame on the top seats on both sides of the frame.

[0008] Preferably, the frame has sliding holes on both sides, and the slide rod slides through the sliding hole on each side.

[0009] Preferably, the linkage assembly includes a sleeve frame, a slide groove, a slide plate, a second push plate, an inclined seat, a sleeve base, and a second inclined frame. The sleeve frame is slidably disposed on both sides of the I-beam crossbeam. The filling frame is connected to the upper end of the sleeve frame. The slide groove is opened at both ends of the I-beam crossbeam. The slide plate is slidably disposed in the slide groove. The second push plate is connected to both sides of the slide plate and is located on the side of the sleeve frame that is far away from each other. The inclined seat is connected to both ends of the side of the sleeve frame that is far away from each other, and the inclined seat slides and abuts against the second push plate on its respective side. The sleeve base is slidably disposed on both sides of both ends of the I-beam crossbeam. Each sleeve base is rotatably connected to the sleeve frame on its respective side by a second rotating plate. The second inclined frame is connected to the sleeve base and slides and abuts against the first push plate.

[0010] Preferably, the sliding grooves at both ends of the I-beam are connected to sliding rod frames three on their respective inner walls, the sleeves are slidably fitted on the outer ends of the sliding rod frames three, and a spring one fitted on the outer side of the sliding rod frames three is connected between adjacent sleeves. The inclined frame two is also connected to a guide plate, and the push plate one slides and abuts against the guide plate. Multiple guide rods are evenly spaced on both sides of the I-beam, and the sleeve frame is slidably fitted on the outer side of the guide rods.

[0011] Preferably, the reinforcing component includes a frame base, a sleeve, a threaded cylinder, a steel strand, and a stud head. The frame base is connected to both sides of the support, the steel sleeve is connected to the frame base and fitted inside the frame base, the threaded cylinder is rotatably fitted inside the sleeve, the steel strand passes through the sequentially connected central steel longitudinal beam and side steel longitudinal beam, and the stud head is connected to both ends of the steel strand and threadedly fitted inside the threaded cylinder.

[0012] Preferably, the threaded cylinder extends to the outside of the frame and is fitted with a turntable.

[0013] A bridge-to-bridge on-site splicing process for heavy vehicles crossing a bridge includes the following steps: Step 1: Transport the central steel longitudinal beam, side steel longitudinal beams and I-beam crossbeams to the site. Lay the central steel longitudinal beams parallel to each other on both sides of the bridge. Then, sequentially install the side steel longitudinal beams at the front and rear ends of the central steel longitudinal beams until the side steel longitudinal beams extend to the bank on both sides. Finally, install the bearings for the bank support at the end of the side steel longitudinal beams away from the central steel longitudinal beams. Step 2: Connect the top plates on the central steel longitudinal beams and the side steel longitudinal beams that are connected in sequence with connecting blocks, and connect the manual hydraulic rod to the top plate near the side. Then, hoist the I-beam steel crossbeams from the middle to both sides and lay them between the central steel longitudinal beams and the side steel longitudinal beams. Step 3: Control the manual hydraulic rod to move the top plate down, so that the arrangement component runs first, adjusts the spacing between adjacent I-beams to form equal spacing, and as the top plate continues to move down, it drives the linkage component, so that the filling frames on both sides of the I-beam slide away from each other and abut against the filling frames on the adjacent I-beams, so as to fill the gap between the adjacent I-beams. Step 4: Install the reinforcing components between the central steel longitudinal beam and the side steel longitudinal beams that are parallel to each other on both sides to improve the stress on the central steel longitudinal beam and the side steel longitudinal beams and provide stable support for the I-beam crossbeam.

[0014] The beneficial effects of this invention are: 1. The technical solution of this invention involves laying parallel central steel longitudinal beams on both sides of the bridge on site, and sequentially installing side steel longitudinal beams on the outer side of the steel sleeves at the front and rear ends of the central steel longitudinal beams. This process continues with one central steel longitudinal beam and one side steel longitudinal beam at one end until the side steel longitudinal beams extend to the bank on both sides. Supports are then installed at the end of the side steel longitudinal beams away from the central steel longitudinal beams, connecting them to the bank support. The sequentially connected central steel longitudinal beams and the top plates on the side steel longitudinal beams are connected by connecting blocks, and a manual hydraulic rod is connected to the top plate closest to the side. After the I-beams are laid, the manual hydraulic rod is manually operated to control each central steel longitudinal beam. The top plate connected to the steel longitudinal beam and the side steel longitudinal beam by the connecting block moves down synchronously, thereby pushing the rotating plate to rotate, causing the slide to slide on the slide rod frame, and then pushing the push plate to slide and fit against the inclined frame connected to the top seats on both sides, so as to push the top seats on both sides to move the slide rods and limit plates on both sides of the same frame away from each other, until the top seats make center contact and limit the guide seats between adjacent frames. Under the synchronous action of both sides, the various I-beams laid can be adjusted at equal intervals to ensure installation accuracy and uniform spacing between adjacent I-beams, so as to facilitate the smooth movement of subsequent vehicles. 2. The technical solution of the present invention continuously controls the downward movement of the top plate, and the push plate one will slide relative to the inclined frame one and gradually come into contact with the inclined frame two. This pushes the sleeves on both sides of the sliding rod frame three closer together and compresses the spring one, which simultaneously drives the rotating plate two to push the sliding plate slide. The push plates two on both sides of the sliding plate then come into contact with the inclined seats on the sleeves on both sides of the I-beam crossbeam, so that the sleeves on both sides of the I-beam crossbeam can drive the filling frames away from each other until the filling frames between adjacent I-beam crossbeams slide to the contact state. In this way, a certain gap can be formed between the I-beam crossbeams during assembly to facilitate assembly. Subsequently, the gap can be filled by controlling the filling frames between adjacent I-beam crossbeams to come closer together to ensure the smooth movement of subsequent vehicles. 3. The technical solution of the present invention, after adjusting the I-beam crossbeam, allows steel strands to be threaded between the central steel longitudinal beam and the side steel longitudinal beam, which are sequentially mounted on both sides. Then, the studs at both ends of the steel strands are threaded into the threaded cylinders mounted on the supports on both sides. By rotating the turntable, the threaded cylinders are rotated more easily, thereby driving the studs to move axially within them to pull and tighten the steel strands, forming a preload. This allows the central steel longitudinal beam and the side steel longitudinal beam to be more taut, improving the overall stress and ensuring greater support strength and better passability during use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention, in which no components or linkage components are arranged on the side-mounted steel longitudinal beam; Figure 3 This is a schematic diagram of the relevant structure between the steel longitudinal beam and the support in this invention; Figure 4 This is a schematic diagram of the relevant structures on the steel longitudinal beam in this invention; Figure 5 This is a schematic diagram of the structure of the components of the present invention; Figure 6 This is a structural schematic diagram of the arrangement components and linkage components of the present invention; Figure 7 This is a schematic diagram of the relevant structures on the support of the present invention; Figure 8 This is a schematic diagram of the structure of the reinforcing component of the present invention.

[0016] Explanation of reference numerals in the attached figures:

[0017] 1. Central steel longitudinal beam; 2. Side steel longitudinal beam; 3. Support; 4. Frame seat; 5. Steel sleeve; 6. Bolt hole; 7. Stiffening plate; 8. Frame; 9. Sliding hole; 10. Sliding rod bracket one; 11. Top plate; 12. Connecting block; 13. I-beam crossbeam; 14. Guide seat; 15. Guide rod; 16. Sleeve frame; 17. Filler frame; 18. Sliding rod; 19. Limiting plate; 20. Top seat; 21. Tension spring; 22. Diagonal frame 1. 23. Slide rod bracket 2. 24. Slide seat. 25. Push plate 1. 26. Rotating plate 1. 27. Slide groove. 28. Slide plate. 29. Push plate 2. 30. Inclined seat. 31. Slide rod bracket 3. 32. Sleeve seat. 33. Rotating plate 2. 34. Spring 1. 35. Inclined frame 2. 36. Guide plate. 37. Manual hydraulic rod. 38. Sleeve. 39. Threaded cylinder. 40. Turntable. 41. Steel strand. 42. Stud head. Detailed Implementation

[0018] The following will be combined with the appendix Figure 1 To be continued Figure 8The technical solutions in the embodiments of the present invention have been clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: As Figures 1-8 As shown, this invention discloses a bridge-on-bridge splicing device for heavy vehicles crossing a bridge, including a central steel longitudinal beam 1 and a side steel longitudinal beam 2 that are nested together. Supports 3 are provided on the opposite sides of the side steel longitudinal beams 2. Stiffeners 7 are connected to the sides of the central steel longitudinal beam 1 and the side steel longitudinal beams 2 that are close to each other. Multiple sets of frames 8 are connected to each stiffener 7 at equal intervals. Multiple I-beams 13 are arranged parallel to each other and at equal intervals between the central steel longitudinal beam 1 and the side steel longitudinal beams 2. The two ends of the I-beams 13 are connected to the stiffeners 7 and are located between adjacent frames 8. Filler frames 17 are symmetrically slidably arranged on both sides of the I-beams 13. Top plates 11 are slidably arranged on the stiffeners 7. Manual hydraulic rods 37 connected to the top plates 11 on the adjacent side steel longitudinal beams 2 are installed on the supports 3 on both sides. A connecting block 12 is bolted between the top plate 11 on the central steel longitudinal beam 1 and the side steel longitudinal beam 2. Each frame 8 is provided with a sliding block 24 that slides on the corresponding central steel longitudinal beam 1 or side steel longitudinal beam 2. A rotating plate 26 is rotatably connected between the sliding block 24 and the top plate 11. A push plate 25 is also connected to the sliding block 24. An arrangement component is provided on the sliding block 24. The arrangement component is used to drive the I-beam crossbeam 13 between adjacent frames 8 to be centered and aligned when the top plate 11 moves down. A linkage component is also provided on the I-beam crossbeam 13. The linkage component is used to drive the filling frame 17 on the adjacent I-beam crossbeam 13 to slide closer to each other and abut when the sliding block 24 slides. A reinforcing component is also provided between the central steel longitudinal beam 1, the side steel longitudinal beam 2 and the support 3.

[0020] The side-mounted steel longitudinal beams 2 are sequentially fitted onto both ends of the central steel longitudinal beam 1, and the central steel longitudinal beam 1 and the side-mounted steel longitudinal beams 2 are symmetrically arranged on both sides and overlapped on the existing bridge. The two sides of the support 3 are connected to the two ends of the central steel longitudinal beam 1 with steel sleeves 5. The two ends of the side-mounted steel longitudinal beams 2 are respectively fitted onto the outer side of the adjacent steel sleeves 5. Bolt holes 6 for installing bolts are also opened between the side-mounted steel longitudinal beams 2 and the corresponding steel sleeves 5. The steel sleeves 5 themselves have a certain length to ensure that the side-mounted steel longitudinal beams 2 and the central steel longitudinal beam 1 are alternately fitted onto both ends of the central steel longitudinal beam 1. The setting of bolt holes 6 also facilitates the secure installation by bolts after the fitting.

[0021] Each stiffener 7 has a sliding rod frame 10 connected to both ends. The top plate 11 is slidably sleeved on the outside of the sliding rod frame 10 on both sides. Each frame 8 has a sliding rod frame 23 connected to the corresponding central steel longitudinal beam 1 or side steel longitudinal beam 2. The slide seat 24 is slidably sleeved on the outside of the sliding rod frame 23 to ensure the stability of the slide seat 24.

[0022] The central steel longitudinal beam 1, the side steel longitudinal beams 2, and the I-beam crossbeam 13 are transported to the site. The central steel longitudinal beams 1 are laid parallel to each other on both sides of the bridge. The side steel longitudinal beams 2 are sequentially installed on the outside of the steel sleeves 5 at the front and rear ends of the central steel longitudinal beams 1. This sequence is repeated, with one end of the central steel longitudinal beam 1 and the other end of the side steel longitudinal beam 2. During the installation process, the central steel longitudinal beams 1 and the side steel longitudinal beams 2 are securely bolted together by installing bolts in the bolt holes 6 until the side steel longitudinal beams 2 extend... Extending to both sides of the bank foundation, a support 3 is fitted onto the end of the side steel longitudinal beam 2 away from the central steel longitudinal beam 1 and supported by the bank foundation. Similarly, the support 3 is bolted to the side steel longitudinal beam 2. The central steel longitudinal beam 1 and the top plate 11 on the side steel longitudinal beam 2 are connected in sequence through the connecting block 12. The manual hydraulic rod 37 is connected to the top plate 11 near the side. Then, the I-shaped steel crossbeam 13 is hoisted from the middle to both sides and laid between the central steel longitudinal beam 1 and the side steel longitudinal beam 2.

[0023] Example 2: Figures 1-8 As shown, the present invention discloses a bridge-on-bridge on-site splicing device for heavy vehicles crossing bridges. Compared with Embodiment 1, this embodiment discloses the structure of the arrangement components.

[0024] The arrangement components include a guide seat 14, a slide rod 18, and a slanted frame 22. The guide seat 14 is connected to both sides of the I-beam crossbeam 13 and overlaps the stiffening plate 7, and is located between adjacent frames 8. The slide rod 18 is symmetrically arranged on both sides of each frame 8 and runs through both sides of the frame 8. One end of the slide rod 18 is connected to a limiting plate 19 inside the frame 8, and the other end of the slide rod 18 is connected to a top seat 20 that fits and abuts against the guide seat 14. A tension spring 21 is sleeved on the outside of the slide rod 18 between the limiting plate 19 and the inner wall of the frame 8. The slanted frame 22 is connected to the upper end of the top seat 20. The push plate 25 slides and abuts against the slanted frame 22 on the top seats 20 on both sides of the frame 8.

[0025] The frame 8 has sliding holes 9 on both sides, and the slide rod 18 slides through the sliding hole 9 on each side.

[0026] After the I-beam crossbeams 13 are laid, the manual hydraulic rod 37 is operated to control the top plates 11 connected by the connecting blocks 12 on each of the central steel longitudinal beams 1 and the side steel longitudinal beams 2 to move down synchronously. This pushes the rotating plate 26 to rotate, causing the sliding seat 24 to slide away from the central steel longitudinal beam 1 or the side steel longitudinal beam 2 on the sliding rod frame 23. This pushes the push plate 25 to slide and contact the inclined frame 22 connected to the top seats 20 on both sides, so as to push the top seats 20 on both sides to move the sliding rods 18 and the limiting plate 19 on both sides of the same frame 8 away from each other and stretch the tension spring 21 until the top seat 20 contacts and limits the guide seat 14 between the adjacent frames 8. Under the synchronous action of both sides, the laid I-beam crossbeams 13 can be adjusted at equal intervals to ensure installation accuracy and uniform spacing between adjacent I-beam crossbeams 13, which facilitates the smooth movement of subsequent vehicles.

[0027] Example 3: Figures 1-8 As shown, this invention discloses a bridge-on-bridge splicing device for heavy vehicles crossing a bridge. Compared with Embodiment 2, this embodiment discloses the structure of the linkage component.

[0028] The linkage assembly includes a sleeve frame 16, a slide groove 27, a slide plate 28, a second push plate 29, an inclined seat 30, a sleeve 32, and an inclined frame 35. The sleeve frame 16 is slidably disposed on both sides of the I-beam crossbeam 13. The filler frame 17 is connected to the upper end of the sleeve frame 16. The slide groove 27 is opened at both ends of the I-beam crossbeam 13. The slide plate 28 is slidably disposed in the slide groove 27. The second push plate 29 is connected to both sides of the slide plate 28 and is located on the side of the sleeve frame 16 that is far away from each other. The inclined seat 30 is connected to both ends of the side of the sleeve frame 16 that is far away from each other, and the inclined seat 30 slides and abuts against the second push plate 29 on its respective side. The sleeve 32 is slidably disposed on both sides of both ends of the I-beam crossbeam 13. Each sleeve 32 is rotatably connected to the sleeve frame 16 on its respective side by a second rotating plate 33. The second inclined frame 35 is connected to the sleeve 32 and slides and abuts against the first push plate 25.

[0029] The sliding grooves 27 at both ends of the I-beam 13 are connected to sliding rod brackets 31 on the inner walls of the sides away from each other. Sleeves 32 are slidably fitted on the outer ends of sliding rod brackets 31. Springs 34 are connected between adjacent sleeves 32 and fitted on the outer side of sliding rod brackets 31. The inclined frame 35 is also connected to a guide plate 36. Push plate 25 slides and contacts the guide plate 36. Multiple guide rods 15 are connected at equal intervals on both sides of the I-beam 13. Sleeves 16 are slidably fitted on the outer side of the guide rods 15.

[0030] By continuously controlling the downward movement of the top plate 11, after adjusting the spacing of each I-beam crossbeam 13, the push plate 1 25 will slide relative to the inclined frame 1 22 and gradually come into contact with the inclined frame 2 35. This pushes the sleeves 32 on both sides of the sliding rod frame 31 closer together and compresses the spring 1 34, simultaneously driving the rotating plate 2 33 to push the sliding plate 28 to slide. This causes the sliding plates 28 in the sliding grooves 27 on both sides of the I-beam crossbeam 13 to slide closer together, and the push plates 29 on both sides of the sliding plate 28 abut against the inclined seats 30 on the sleeves 16 on both sides of the I-beam crossbeam 13, thus... The sleeves 16 on both sides of the I-beam crossbeam 13 can drive the filler frames 17 away from each other until the filler frames 17 between adjacent I-beam crossbeams 13 slide to a contact state. This allows a certain gap to be formed between the I-beam crossbeams 13 during assembly, which facilitates assembly. Subsequently, the gap can be filled by controlling the filler frames 17 between adjacent I-beam crossbeams 13 to move closer to each other, ensuring the smooth movement of the vehicle. At the same time, it also makes the adjacent I-beam crossbeams 13 more stable under the limit between the top seat 20 and the adjacent filler frames 17 when the vehicle is in motion.

[0031] Example 4: Figures 1-8 As shown, the present invention discloses a bridge-on-bridge splicing device for heavy vehicles crossing a bridge. Compared with Embodiment 3, this embodiment discloses the structure of the reinforcing component.

[0032] The reinforcing components include a frame base 4, a sleeve 38, a threaded cylinder 39, a steel strand 41, and a stud head 42. The frame base 4 is connected to both sides of the support 3. The steel sleeve 5 is connected to the frame base 4. The sleeve 38 is fitted inside the frame base 4. The threaded cylinder 39 is rotatably fitted inside the sleeve 38. The steel strand 41 passes through the central steel longitudinal beam 1 and the side steel longitudinal beam 2 that are connected in sequence. The stud head 42 is connected to both ends of the steel strand 41 and is threaded inside the threaded cylinder 39.

[0033] The threaded cylinder 39 extends to the outside of the frame 4 and is fitted with a turntable 40.

[0034] After adjusting the I-beam crossbeam 13, a steel strand 41 can be threaded between the central steel longitudinal beam 1 and the side steel longitudinal beam 2, which are sequentially mounted on both sides. Then, the stud heads 42 at both ends of the steel strand 41 are threaded into the threaded cylinders 39 mounted on the side supports 3. By rotating the turntable 40, the threaded cylinders 39 are rotated more easily, thereby driving the stud heads 42 to move axially within them. This achieves synchronous adjustment of the threaded cylinders 39 in the frame seats 4 of the two end supports 3, so as to pull and tighten the steel strand 41, forming a preload. This allows the central steel longitudinal beam 1 and the side steel longitudinal beam 2 to be tightened more, improving the overall stress and ensuring greater support strength and better passability during use.

[0035] Example 5: Figures 1-8As shown, this invention discloses a bridge-on-bridge on-site splicing process for heavy vehicles crossing bridges, including the following steps: Step 1: Transport the central steel longitudinal beam 1, the side steel longitudinal beam 2 and the I-beam crossbeam 13 to the site. Lay the central steel longitudinal beam 1 parallel to each other on both sides of the bridge. Then, sequentially install the side steel longitudinal beam 2 at the front and rear ends of the central steel longitudinal beam 1 until the side steel longitudinal beam 2 extends to the bank foundation on both sides. Finally, install the support 3 of the bank foundation at the end of the side steel longitudinal beam 2 away from the central steel longitudinal beam 1. Step 2: Connect the top plate 11 on the central steel longitudinal beam 1 and the side steel longitudinal beam 2 in sequence through the connecting block 12, and connect the manual hydraulic rod 37 to the top plate 11 near the side. Then, hoist the I-beam steel crossbeam 13 from the middle to both sides between the central steel longitudinal beam 1 and the side steel longitudinal beam 2. Step 3: Control the manual hydraulic rod 37 to move the top plate 11 downward, so that the arrangement component runs first, adjusts the adjacent I-beam crossbeams 13 to form an equal spacing, and as the top plate 11 continues to move downward, it drives the linkage component, so that the filling frames 17 on both sides of the I-beam crossbeams 13 slide away from each other and abut against the filling frames 17 on the adjacent I-beam crossbeams 13, so as to fill the gap between the adjacent I-beam crossbeams 13; Step 4: Install the reinforcing components between the central steel longitudinal beam 1 and the side steel longitudinal beam 2, which are parallel to each other on both sides, to improve the stress on the central steel longitudinal beam 1 and the side steel longitudinal beam 2 and provide stable support for the I-beam crossbeam 13.

[0036] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A bridge-on-bridge splicing device for heavy vehicles crossing a bridge, comprising a central steel longitudinal beam (1) and side steel longitudinal beams (2) nested together, wherein supports (3) are provided on the opposite sides of the side steel longitudinal beams (2), characterized in that, The central steel longitudinal beam (1) and the side steel longitudinal beam (2) on both sides are connected to each other with stiffening plates (7). Each stiffening plate (7) is connected to multiple sets of frames (8) at equal intervals. The central steel longitudinal beam (1) and the side steel longitudinal beam (2) on both sides are arranged parallel to each other and at equal intervals with multiple I-shaped steel beams (13). The two ends of the I-shaped steel beams (13) are connected to the stiffening plates (7) and are located between adjacent frames (8). The I-shaped steel beams (13) are symmetrically and slidably equipped with filler frames (17) on both sides. The stiffening plates (7) are slidably equipped with top plates (11). The supports (3) on both sides are equipped with manual hydraulic rods (37) that are connected to the top plates (11) on the adjacent side steel longitudinal beams (2). A connecting block (12) is bolted between the top plate (11) on the central steel longitudinal beam (1) and the side steel longitudinal beam (2). Each frame (8) is provided with a slide (24) that slides on the corresponding central steel longitudinal beam (1) or side steel longitudinal beam (2). A rotating plate (26) is rotatably connected between the slide (24) and the top plate (11). A push plate (25) is also connected to the slide (24). An arrangement component is provided on the slide (24). The arrangement component is used to drive the I-beams (13) between adjacent frames (8) to be centered and aligned when the top plate (11) moves down. The I-beams (13) are also equipped with a linkage component. The linkage component is used to drive the filler frame (17) on the side of the adjacent I-beams (13) to slide and collide with each other when the slide (24) slides. A reinforcing component is also provided between the central steel longitudinal beam (1), the side steel longitudinal beam (2) and the support (3).

2. The bridge-on-bridge splicing equipment for heavy vehicles crossing a bridge according to claim 1, characterized in that, The side-mounted steel longitudinal beams (2) are sequentially fitted at both ends of the central steel longitudinal beam (1), and the central steel longitudinal beam (1) and the side-mounted steel longitudinal beams (2) are symmetrically arranged on both sides and overlapped on the existing bridge. The two sides of the support (3) are connected to the two ends of the central steel longitudinal beam (1) with steel sleeves (5). The two ends of the side-mounted steel longitudinal beams (2) are respectively fitted on the outside of the adjacent steel sleeves (5). Bolt holes (6) for installing bolts are also opened between the side-mounted steel longitudinal beams (2) and the corresponding steel sleeves (5).

3. The bridge-on-bridge splicing equipment for heavy vehicles crossing a bridge according to claim 1, characterized in that, Each of the stiffening plates (7) is connected to a sliding rod frame one (10) at both ends. The top plate (11) is slidably sleeved on the outside of the sliding rod frame one (10) on both sides. Each of the frames (8) is provided with a sliding rod frame two (23) connected to the corresponding central steel longitudinal beam (1) or side steel longitudinal beam (2). The sliding seat (24) is slidably sleeved on the outside of the sliding rod frame two (23).

4. The bridge-on-bridge splicing equipment for heavy vehicles crossing a bridge according to claim 1, characterized in that, The arrangement components include a guide seat (14), a slide rod (18), and a first inclined frame (22). The guide seat (14) is connected to both sides of the I-beam crossbeam (13) and overlaps on the stiffening plate (7), and is located between adjacent frames (8). The slide rod (18) is symmetrically arranged on both sides of each frame (8) and passes through both sides of the frame (8). One end of the slide rod (18) is connected to a limiting plate (19) inside the frame (8), and the other end of the frame (8) is connected to a top seat (20) that fits and abuts against the guide seat (14). A tension spring (21) sleeved on the outside of the slide rod (18) is connected between the limiting plate (19) and the inner wall of the frame (8). The first inclined frame (22) is connected to the upper end of the top seat (20). The first push plate (25) slides and fits against the first inclined frame (22) on the top seats (20) on both sides of the frame (8).

5. The bridge-on-bridge splicing equipment for heavy vehicles crossing a bridge according to claim 4, characterized in that, The frame (8) has sliding holes (9) on both sides, and the slide rod (18) slides through the sliding hole (9) on its respective side.

6. The bridge-on-bridge splicing equipment for heavy vehicles crossing a bridge according to claim 1, characterized in that, The linkage assembly includes a sleeve frame (16), a slide groove (27), a slide plate (28), a second push plate (29), an inclined seat (30), a sleeve seat (32), and a second inclined frame (35). The sleeve frame (16) is slidably disposed on both sides of the I-beam crossbeam (13). The filler frame (17) is connected to the upper end of the sleeve frame (16). The slide groove (27) is opened at both ends of the I-beam crossbeam (13). The slide plate (28) is slidably disposed in the slide groove (27). The second push plate (29) is connected to both sides of the slide plate (28) and is positioned... On the two sides of the sleeve frame (16) that are far apart from each other, the inclined seat (30) is connected to both ends of the two sides of the sleeve frame (16) that are far apart from each other, and the inclined seat (30) slides and abuts against the push plate two (29) on each side. The sleeve (32) is slidably set on both sides of the I-beam crossbeam (13). Each sleeve (32) is rotatably connected to the sleeve frame (16) on each side. The inclined frame two (35) is connected to the sleeve (32) and slides and abuts against the push plate one (25).

7. The bridge-on-bridge splicing equipment for heavy vehicles crossing a bridge according to claim 6, characterized in that, The sliding grooves (27) at both ends of the I-beam (13) are connected to sliding rod brackets (31) on the inner walls of the sides away from each other. The sleeves (32) are slidably fitted on the outer ends of the sliding rod brackets (31). A spring (34) fitted on the outer side of the sliding rod brackets (31) is connected between adjacent sleeves (32). A guide plate (36) is also connected to the inclined frame (35). The push plate (25) slides and abuts against the guide plate (36). Multiple guide rods (15) are evenly spaced on both sides of the I-beam (13). The sleeve (16) is slidably fitted on the outer side of the guide rods (15).

8. The bridge-on-bridge splicing equipment for heavy vehicles crossing a bridge according to claim 1, characterized in that, The reinforcing components include a frame base (4), a sleeve (38), a threaded cylinder (39), a steel strand (41), and a stud head (42). The frame base (4) is connected to both sides of the support (3). The steel sleeve (5) is connected to the frame base (4). The sleeve (38) is fitted inside the frame base (4). The threaded cylinder (39) is rotatably fitted inside the sleeve (38). The steel strand (41) passes through the central steel longitudinal beam (1) and the side steel longitudinal beam (2) that are connected in sequence. The stud head (42) is connected to both ends of the steel strand (41) and is threaded inside the threaded cylinder (39).

9. The bridge-on-bridge splicing equipment for heavy vehicles crossing a bridge according to claim 8, characterized in that, The threaded cylinder (39) extends to the outside of the frame (4) and is fitted with a turntable (40).

10. A bridge-to-bridge on-site splicing process for heavy vehicles crossing a bridge, based on the bridge-to-bridge on-site splicing equipment for heavy vehicles crossing a bridge as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Transport the central steel longitudinal beam (1), the side steel longitudinal beam (2) and the I-beam crossbeam (13) to the site. Lay the central steel longitudinal beam (1) parallel to each other on both sides of the bridge at the site. Then, install the side steel longitudinal beam (2) sequentially at the front and rear ends of the central steel longitudinal beam (1) until the side steel longitudinal beam (2) extends to the bank foundation on both sides. Then, install the support (3) for the bank foundation support at the end of the side steel longitudinal beam (2) away from the central steel longitudinal beam (1). Step 2: Connect the top plate (11) on the central steel longitudinal beam (1) and the side steel longitudinal beam (2) in sequence through the connecting block (12), and connect the manual hydraulic rod (37) to the top plate (11) near the side. Then, hoist the I-beam steel crossbeam (13) from the middle to both sides between the central steel longitudinal beam (1) and the side steel longitudinal beam (2). Step 3: Control the manual hydraulic rod (37) to drive the top plate (11) to move down, so that the arrangement component runs first, adjusts the adjacent I-beam crossbeams (13) to form an equal spacing, and as the top plate (11) continues to move down, it drives the linkage component, so that the filling frames (17) on both sides of the I-beam crossbeams (13) slide away from each other and abut against the filling frames (17) on the adjacent I-beam crossbeams (13) to fill the gap between the adjacent I-beam crossbeams (13); Step 4: Install the reinforcing components between the central steel longitudinal beam (1) and the side steel longitudinal beam (2) that are parallel to each other on both sides to improve the stress on the central steel longitudinal beam (1) and the side steel longitudinal beam (2) and provide stable support for the I-beam crossbeam (13).

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