A structure for reinforcing ancient stone arch bridges using prefabricated steel profiles

Abstract

This utility model discloses a structure for reinforcing an ancient stone arch bridge using prefabricated steel profiles, belonging to the field of arch bridge reinforcement technology. The structure is located at the lower part of the arch ring and includes an H-shaped steel curved arch ring, H-shaped steel support fixing plates at both ends of the H-shaped steel curved arch ring, energy-dissipating damping supports at the bottom of the reinforcement structure, energy-dissipating dampers on both sides of the energy-dissipating damping supports, H-shaped steel crossbeams fixed to the inner side of the connection nodes between the H-shaped steel curved arch ring and the H-shaped steel support fixing plates, longitudinal angle steel connecting beams connecting adjacent reinforcement modules, stiffening plates, node end plates, end plate fixing bolts, high-strength connecting beam bolts, crossbeam node connecting plates, ribbed crossbeam node connecting plates, high-strength through bolts connecting crossbeam nodes, support anchors, rubber buffer pads, and anchor bolt pads. The reinforcement structure is fixed to the foundation by support anchors, and adjacent reinforcement modules are connected by longitudinal angle steel connecting beams and high-strength connecting beam bolts, forming a detachable modular steel reinforcement system.

Description

Technical Field

[0001] This utility model belongs to the field of arch bridge reinforcement technology, specifically involving a structure for reinforcing ancient stone arch bridges using prefabricated steel profiles, which meets the basic principles of "identifiability, reversibility, and minimal intervention" in cultural relic restoration. Background Technology

[0002] Arch bridges, as a type of bridge with a long history, possess a unique structural form and are widely distributed. Due to their high load-bearing capacity, relatively low cost, mature construction techniques, and availability of locally sourced materials, arch bridges held an important position in ancient bridge engineering. However, many stone arch bridges built during the Ming and Qing dynasties are now over a century old. Due to long-term environmental factors and aging, they inevitably suffer from varying degrees of damage, leading to cracks, settlement, and decreased strength in some structures. Furthermore, the brittle nature of stone masonry bridges means that the mortar joints between masonry blocks are prone to erosion by rainwater, significantly reducing the load-bearing capacity of the structure and lowering its service safety. Considering the fundamental principles of "identifiability, reversibility, and minimal intervention" in the restoration and protection of cultural relics, how to strengthen the bridge structure using modern technologies to improve its structural performance has become an important issue.

[0003] Currently, common reinforcement methods for masonry components include cross-section enlargement and external bonding reinforcement. Cross-section enlargement increases the cross-sectional dimensions of key parts of the arch bridge (such as the arch ring, arch ribs, and arch feet) to improve their bending stiffness, compressive bearing capacity, and overall stability. This allows the arch bridge to share the load with the original structure, distributing the load and inhibiting crack propagation. However, this method increases the load on the original arch bridge structure, has complex construction techniques, a long construction period, and impacts traffic above the arch. External bonding reinforcement (including materials such as carbon fiber cloth and steel plates) uses adhesives to bond high-strength materials to weak areas of the arch bridge (such as the arch weft and arch back). This allows the external material to share the load with the original arch bridge structure, improving bearing capacity and durability, and inhibiting crack development. However, this method is costly, significantly affected by environmental factors, and prone to adhesive layer debonding, leading to the failure of the external material.

[0004] Utility model patent application CN212771997U discloses a rapid reinforcement structure for stone arch bridges. This structure is installed from top to bottom inside the arch of the old bridge foundation, using anchor bolts to connect the original arch and the reinforcement structure, thus improving overall integrity. A steel arch frame is used as the main load-bearing component of the reinforcement structure, increasing the load-bearing capacity of the old arch. Locking anchor bolts are used to improve the horizontal load-bearing capacity of the reinforcement structure. Shotcrete is used to ensure the integrity and durability of the reinforcement structure. However, this reinforcement structure is prone to causing secondary damage to the original structure and increases the burden on the original structure.

[0005] Patent CN112482188B discloses a reinforcement structure for an arch bridge and its construction method, including: a bridge deck, piers, and an arch ring. An arc-shaped pressure plate is provided on the lower surface of the arch ring, and several arch frames arranged at certain intervals are provided below the pressure plate, with arc-shaped support beams between adjacent arch frames. This reinforcement method forms a multi-point support system by setting an arc-shaped pressure plate and pressure transmission elements below the arch crown, combined with the spaced arch frames and symmetrical arc-shaped support beams. The two ends of the arch frames are anchored to the piers, and diagonal braces are added between the support beams and crossbeams to synergistically enhance the rigidity of the arch ring, distribute the load, and improve the overall bearing capacity. However, this reinforcement method has a complex process, is difficult to construct, and has a long construction period.

[0006] Based on the material properties of stone masonry and the actual stress characteristics of arch bridges, this utility model proposes a structure for reinforcing ancient stone masonry arch bridges using prefabricated steel sections to address the shortcomings of existing technologies. This aims to reduce secondary damage to the bridge structure, improve on-site assembly efficiency, and facilitate subsequent disassembly and maintenance. While meeting reinforcement requirements, it minimizes the impact on the bridge structure itself, ensuring the bridge's normal functionality. Furthermore, when the bridge structure is subjected to external factors such as vehicle loads, wind loads, and temperature changes, it can effectively resist the resulting changes in internal forces such as pressure, shear force, and bending moment, and effectively control vibration response. During earthquakes, it can enhance the structure's seismic resistance through energy dissipation, thereby ensuring the safety, usability, and durability of the bridge structure. Utility Model Content

[0007] The purpose of this utility model is to provide a structure for reinforcing ancient stone arch bridges using prefabricated steel profiles. This structure is installed at the lower part of the arch ring, meeting the principles of "identifiability, reversibility, and minimal intervention" in the restoration of ancient buildings. While meeting reinforcement requirements, it minimizes the impact on the bridge structure itself. Primarily used to withstand radial pressure, it effectively resists changes in internal forces such as pressure, shear force, and bending moment generated by external factors such as vehicle loads, wind loads, and temperature changes, and effectively controls vibration response. During earthquakes, it enhances the structure's seismic resistance through energy dissipation, thereby ensuring the safety, applicability, and durability of the bridge structure.

[0008] To achieve the purpose of this utility model, the technical solution adopted is as follows: a structure for reinforcing an ancient stone arch bridge with prefabricated steel profiles, including an energy-dissipating damping bearing installed on the foundation by bearing anchor bolts, an energy-dissipating damper installed on the bottom plate of the energy-dissipating damping bearing, an H-shaped steel bearing fixing plate installed on the energy-dissipating damping bearing by bearing connecting bolts, an H-shaped steel curved arch ring installed on the upper part of the H-shaped steel bearing fixing plate by end plate fixing bolts, an H-shaped steel crossbeam fixed to the inner side of the connection node between the H-shaped steel curved arch ring and the H-shaped steel bearing fixing plate, an angle steel longitudinal connecting beam connected to the node stiffening plate by high-strength bolts, and a rubber buffer pad installed at the joint surface of the H-shaped steel curved arch ring, the H-shaped steel bearing fixing plate and the arch web.

[0009] Furthermore, the energy-dissipating damping supports are symmetrically arranged at the bottom of the entire structure and anchored into the foundation by support anchors. Each energy-dissipating damping support has four support anchors, symmetrically distributed at the four corners of the base plate of the energy-dissipating damping support. An anchor plate is provided on each support anchor and clamped between the support anchor and the base plate. The energy-dissipating dampers are symmetrically arranged at the left and right ends of the energy-dissipating damping supports.

[0010] Furthermore, the H-shaped steel support fixing plate is fixed to the upper part of two symmetrically arranged energy-dissipating damping supports by support connecting bolts. The front and back of the connection area between the H-shaped steel flange and the bottom plate are provided with steel fixing plate stiffening ribs to enhance the rigidity and load-bearing capacity of the plate and improve the structural stability.

[0011] Furthermore, both ends of the H-beam curved arch and the upper end of the H-beam support fixing plate are provided with node end plates. The node end plates have pre-drilled mounting holes. The end plate fixing bolts pass through the mounting holes on the node end plates at the ends of the H-beam curved arch and the mounting holes on the node end plates at the upper end of the H-beam support fixing plate, and are tightened to achieve the connection and fixation between the H-beam curved arch and the H-beam support fixing plate.

[0012] Furthermore, the H-beam curved arch ring is equipped with stiffening plates and connecting beam node stiffening plates. Both the stiffening plates and connecting beam node stiffening plates are welded onto the H-beam curved arch ring according to actual engineering and design specifications to enhance load-bearing capacity and improve stress distribution. The stiffening plates are welded to the unconnected side of the H-beam curved arch ring, and the connecting beam node stiffening plates are welded to the side of the H-beam curved arch ring that connects to the adjacent H-beam curved arch ring to serve as connection nodes.

[0013] Furthermore, the H-beam is fixed to the connection node between the H-beam curved arch and the H-beam support fixing plate via a beam node connecting plate and a ribbed beam node connecting plate, thereby improving the overall integrity of the structure and the stability and reliability of the node, and achieving effective load distribution and transmission.

[0014] Furthermore, the longitudinal connecting beam of the angle steel is set between two adjacent H-shaped steel curved arches. The stiffening plate of the connecting beam node has reserved installation holes. The two ends of the longitudinal connecting beam of the angle steel pass through the reserved installation holes of the stiffening plate of the connecting beam node on the two adjacent H-shaped steel curved arches respectively through the connecting beam high-strength bolts and tighten them, so that the two adjacent arches form a whole.

[0015] Furthermore, rubber buffer pads are installed at the joint surfaces of the H-beam curved arch ring and the H-beam support fixing plate with the arch web, which can effectively reduce the damage to the bridge structure and reinforcement structure caused by rigid impacts from vehicle traffic and earthquakes on the bridge, thereby extending the service life of the bridge structure and reinforcement structure.

[0016] The beneficial effects of this utility model are: (1) The structure meets the basic principles of “identifiability, reversibility and minimal intervention” for the reinforcement of cultural relics. The prefabricated steel reinforcement structure can significantly improve the load-bearing capacity of the original cultural relic and solve the problem of the brittleness and poor ductility of stone cultural relics. It effectively improves the bridge’s resistance to collapse under strong earthquakes and is suitable for use in high-intensity seismic fortification areas.

[0017] (2) Reduce secondary damage to the bridge structure. This utility model uses anchor bolts to fix the bridge structure, which can effectively reduce secondary damage to the bridge structure caused by the reinforcement structure. In addition, a rubber buffer pad is added between the reinforcement structure and the bridge structure as a flexible connection, which can effectively reduce the damage to the bridge body caused by the reinforcement structure due to vehicle traffic on the bridge and earthquakes, and extend the service life of the bridge.

[0018] (3) Simple processing and easy assembly. All the reinforcing components involved in this utility model are prefabricated. The welding parts of the connecting structure are completed in the factory in advance. After being transported to the site, they are assembled on site using high-strength bolts, which reduces the difficulty of operation for workers and improves the construction speed and construction quality.

[0019] (4) The modules are independent. This utility model is composed of multiple H-shaped steel supports and H-shaped steel curved arches combined front and back, and connected by longitudinal angle steel beams. The reinforcement components are highly independent, which effectively improves the reliability and fault tolerance of the reinforcement system.

[0020] (5) Good overall load-bearing performance. Multiple H-shaped steel arches are connected and fixed by angle steel, which not only improves the load-bearing capacity of the bridge, but also greatly enhances the overturning resistance of the reinforced structure. At the same time, it reduces the pressure of the bridge body on individual support structures, extends the service life of the reinforced structure, and greatly improves the stability and reliability of the bridge.

[0021] (6) Easy to disassemble and reduce maintenance costs. The device is easy to disassemble. Adjacent modular units can be separated by loosening the high-strength bolts, which facilitates post-earthquake repair and replacement of damaged components. It conforms to the design concept of green and sustainable development of modular steel structures. Attached Figure Description

[0022] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0023] Figure 1 This is a schematic diagram of the axonal structure of the utility model; Figure 2 This is a front view of the utility model; Figure 3 This is a top view of the structure of the utility model; Figure 4 Schematic diagram of H-beam steel support fixing plate and energy dissipation damping support; Figure 5 Schematic diagram of an energy-dissipating damping support explosion; Figure 6 This is a schematic diagram of the connection of H-beam crossbeam nodes; Figure 7 This is a schematic diagram of a longitudinal connecting beam made of angle steel. Figure 8 This is a schematic diagram of an energy-dissipating damper; The attached diagram shows the markings and corresponding component names: 1. H-beam bending arch; 2. H-beam support fixing plate; 3. Energy-dissipating damping support; 301. Support connecting bolts; 302. H-beam fixing plate; 303. Energy-dissipating damping support base plate; 4. Energy-dissipating damper; 401. Elastic energy-dissipating element; 402. Vertical energy-dissipating plate; 403. Upper horizontal plate; 404. Lower horizontal plate; 405. Upper horizontal plate fixing bolts; 406. Lower horizontal plate fixing bolts. 5. H-beam crossbeam; 6. Stiffening plate; 7. Node end plate; 8. End plate fixing bolt; 9. Angle steel longitudinal connecting beam; 10. Connecting beam node stiffening plate; 11. Connecting beam high-strength bolt; 12. Crossbeam node connecting plate; 13. Crossbeam node ribbed connecting plate; 14. Crossbeam node high-strength through bolt; 15. Steel fixing insert plate stiffening rib; 16. Support anchor bolt; 17. Rubber buffer pad; 18. Anchor bolt pad. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.

[0025] It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 As shown, this utility model provides a structure for reinforcing an ancient stone arch bridge using prefabricated steel profiles. Each reinforcing module includes an H-shaped steel curved arch ring 1, H-shaped steel support fixing plates 2 located at both ends of the H-shaped steel curved arch ring 1, energy-dissipating damping supports 3 symmetrically arranged at the bottom of the entire reinforcing structure, energy-dissipating dampers 4 symmetrically arranged at the left and right ends of the energy-dissipating damping supports 3, and an H-shaped steel crossbeam 5 located inside the H-shaped steel curved arch ring 1, which transversely connects the two arch bodies. The connection between two adjacent reinforcing modules can be achieved through longitudinal connecting beams 9 made of angle steel.

[0027] Furthermore, the H-beam curved arch 1 is provided with stiffening plates 6 and connecting beam node stiffening plates 10. Both stiffening plates 6 and connecting beam node stiffening plates 10 are welded to the H-beam curved arch 1 according to actual engineering and design specifications to enhance load-bearing capacity and improve stress distribution. The stiffening plates 6 are welded to the side of the H-beam curved arch 1 that does not need to be connected to other H-beam curved arch 1s, while the node stiffening plates 10 are welded to the side of the H-beam curved arch 1 that needs to be connected to adjacent H-beam curved arch 1s as connection nodes.

[0028] like Figure 1 and Figure 2 As shown, both ends of the H-beam curved arch 1 and the upper end of the H-beam support fixing plate 2 are provided with node end plates 7. Three mounting holes are reserved on the node end plates 7. The end plate fixing bolts 8 pass through the reserved mounting holes and are tightened to realize the fixed connection between the H-beam curved arch 1 and the H-beam support fixing plate 2.

[0029] Furthermore, at the connection area between the H-shaped steel flange and the base plate of the H-shaped steel support fixing plate 2, both the front and back sides are provided with steel fixing plate stiffening ribs 15 to enhance the rigidity and load-bearing capacity of the plate and improve structural stability.

[0030] Furthermore, rubber buffer pads 17 are installed at the joint surfaces of the H-beam curved arch ring 1 and the H-beam support fixing plate 2 with the arch web, which can effectively reduce the damage to the bridge structure and reinforcement structure caused by rigid impacts from vehicle traffic and earthquakes on the bridge, thereby extending the service life of the bridge structure and reinforcement structure.

[0031] like Figure 2 and Figure 6 As shown, an H-beam crossbeam 5 is provided on the inner side of the connection node between the H-beam curved arch 1 and the H-beam support fixing plate 2. The H-beam crossbeam 5 is fixed to the connection node between the H-beam curved arch 1 and the H-beam support fixing plate 2 through the crossbeam node connecting plate 12 and the crossbeam node ribbed connecting plate 13. Both the crossbeam node connecting plate 12 and the crossbeam node ribbed connecting plate 13 have reserved installation holes. The H-beam crossbeam 5 can be fixed by passing the crossbeam node high-strength through bolts 14 through the installation holes and tightening them, thereby improving the overall integrity of the structure and the stability of the node, and realizing the effective distribution and transmission of load.

[0032] Furthermore, the beam node connecting plate 12 is disposed on the upper part of the end connecting node of the H-beam beam 5, and the beam node ribbed connecting plate 13 is disposed on the lower part of the connecting node to improve the rigidity of the node and alleviate stress concentration.

[0033] like Figure 4 and Figure 5 As shown, the energy-dissipating damping support 3 includes a support connecting bolt 301, an H-beam fixing plate 302, and an energy-dissipating damping support base plate 303. The energy-dissipating damping support 3 is symmetrically arranged at the bottom of the reinforced structure. The support connecting bolt 301 passes through the mounting holes of the lower part of the H-beam bending arch 1, the H-beam support fixing plate 2, and the H-beam fixing plate 302 in sequence, and is tightened with nuts to realize the fixed connection between the energy-dissipating damping support 3 and the H-beam bending arch 1 and the H-beam support fixing plate 2.

[0034] Furthermore, each of the four corners of the energy-dissipating damping support base plate 303 is provided with a support anchor bolt 16, and an anchor bolt pad 18 is provided on the support anchor bolt 16 and sandwiched between the support anchor bolt 16 and the support base plate 303.

[0035] like Figure 5 and Figure 8 As shown, the energy-dissipating damper 4 includes an elastic energy-dissipating element 401, a vertical energy-dissipating plate 402, an upper horizontal plate 403, a lower horizontal plate 404, an upper horizontal plate fixing bolt 405, and a lower horizontal plate fixing bolt 406. The energy-dissipating damper 4 is symmetrically arranged at the left and right ends of the energy-dissipating damping support 3. The upper horizontal plate 403 is located at the top of the energy-dissipating damper 4, and the lower horizontal plate 404 is located at its bottom. The vertical energy-dissipating plates 402 are symmetrically arranged on opposite sides of the energy-dissipating damper 4. The elastic energy-dissipating element 401 is arranged between the two vertical energy-dissipating plates 402. Mounting holes are reserved on the upper and lower sides of the upper horizontal plate 403, the lower horizontal plate 404, and the vertical energy-dissipating plate 402.

[0036] Furthermore, the vertical energy dissipation plate 402 has multiple elongated holes. When the structure is subjected to seismic forces, the edges of the elongated holes form concentrated plastic deformation zones, dissipating energy through metal yielding.

[0037] Furthermore, the upper horizontal plate fixing bolt 405 passes through the connecting plate of the H-shaped steel support fixing plate 2, the upper horizontal plate 403 and the mounting hole at the upper end of the vertical energy dissipation plate 402 in sequence, and can be fixedly connected to the upper horizontal plate 403, the H-shaped steel support fixing plate 2 and the vertical energy dissipation plate 402 by tightening.

[0038] Furthermore, the lower horizontal plate fixing bolt 406 passes through the mounting holes of the energy-dissipating damping support base plate 303, the lower horizontal plate 404, and the mounting hole at the lower end of the vertical energy-dissipating plate 402 in sequence, and is tightened to achieve a fixed connection between the lower horizontal plate 404, the energy-dissipating damping support base plate 303, and the vertical energy-dissipating plate 402.

[0039] like Figure 3 and Figure 7 As shown, the two ends of the longitudinal connecting beam 9 of the angle steel are respectively passed through the reserved installation holes of the stiffening plate 10 of the connecting beam node on the two adjacent H-shaped steel bending arch rings 1 by the high-strength bolts 11 of the connecting beam, and tightened to realize the connection of the two adjacent reinforcement modules. After multiple reinforcement modules are connected by the longitudinal connecting beam 9 of the angle steel, a modular combined steel frame reinforcement system can be realized, which can effectively improve the overall collaborative work performance of the reinforcement system, realize the relative displacement between the two-way constraint reinforcement modules, and enhance the structural stability.

[0040] In the specific implementation process, it is worth noting that the stiffening plate 6, the stiffening plate 10 of the connecting beam node, the node end plate 7 and the stiffening rib 15 of the steel fixing insert plate are all welded in the factory, and the components can be directly assembled on the construction site.

[0041] It should be noted that all bolts mentioned in this utility model are high-strength bolts, in order to further improve the overall stability of the connection structure.

Claims

1. A structure for reinforcing ancient stone arch bridges using prefabricated steel profiles, characterized in that, Includes H-beam curved arch ring (1), H-beam support fixing plate (2), energy dissipation damping support (3), energy dissipation damper (4), H-beam crossbeam (5), stiffening plate (6), node end plate (7), end plate fixing bolt (8), angle steel longitudinal connecting beam (9), connecting beam node stiffening plate (10), connecting beam high-strength bolt (11), crossbeam node connecting plate (12), crossbeam node ribbed connecting plate (13), crossbeam node high-strength through bolt (14), steel fixing plate stiffening rib (15), support anchor bolt (16), rubber buffer pad (17), anchor bolt pad (18).

2. The structure for reinforcing an ancient stone arch bridge using prefabricated steel sections according to claim 1, characterized in that, The H-beam curved arch (1) is provided with a stiffening plate (6) and a connecting beam node stiffening plate (10). The stiffening plate (6) is welded to the side of the H-beam curved arch (1) that is not connected, and the connecting beam node stiffening plate (10) is welded to the side of the H-beam curved arch (1) that is connected to the adjacent H-beam curved arch (1) as a connecting node.

3. The structure for reinforcing an ancient stone arch bridge using prefabricated steel sections according to claim 1, characterized in that, The H-beam support fixing plate (2) is set at both ends of the H-beam bending arch (1). Both ends of the H-beam bending arch (1) and the upper end of the H-beam support fixing plate (2) are provided with node end plates (7). The node end plates (7) are reserved with mounting holes. The end plate fixing bolts (8) pass through the mounting holes and are tightened to realize the fixed connection between the H-beam bending arch (1) and the H-beam support fixing plate (2).

4. The structure for reinforcing an ancient stone arch bridge using prefabricated steel sections according to claim 1, characterized in that, The energy-dissipating damping support (3) includes a support connecting bolt (301), an H-beam fixing plate (302), and an energy-dissipating damping support base plate (303). The energy-dissipating damping support (3) is symmetrically arranged at the bottom of the reinforced structure. The support connecting bolt (301) passes through the mounting holes of the H-beam fixing plate (2) and the H-beam fixing plate (302) in sequence and is tightened by nuts to realize the fixed connection between the energy-dissipating damping support (3) and the H-beam fixing plate (2).

5. A structure for reinforcing an ancient stone arch bridge using prefabricated steel sections according to claim 1, characterized in that, The energy-dissipating damper (4) includes an elastic energy-dissipating element (401), a vertical energy-dissipating plate (402), an upper horizontal plate (403), a lower horizontal plate (404), an upper horizontal plate fixing bolt (405), and a lower horizontal plate fixing bolt (406). The energy-dissipating damper (4) is symmetrically arranged at the left and right ends of the energy-dissipating damping support (3). The upper horizontal plate (403) is located at the top of the energy-dissipating damper (4), and the lower horizontal plate (404) is located at the bottom of the energy-dissipating damper (4). The vertical energy-dissipating plate (402) is symmetrically arranged on opposite sides of the energy-dissipating damper (4). The elastic energy-dissipating element (401) is located between the two vertical energy-dissipating plates (402). Mounting holes are reserved on the upper and lower sides of the upper horizontal plate (403), the lower horizontal plate (404), and the vertical energy-dissipating plate (402).

6. A structure for reinforcing an ancient stone arch bridge using prefabricated steel sections according to claim 5, characterized in that, The vertical energy dissipation plate (402) has multiple elongated holes. When the structure is subjected to seismic forces, concentrated plastic deformation zones are formed at the edges of the elongated holes, and energy is dissipated through metal yielding.

7. A structure for reinforcing ancient stone arch bridges using prefabricated steel profiles according to claim 1, characterized in that, The H-beam (5) is fixed to the inner side of the connection node between the H-beam curved arch (1) and the H-beam support fixing plate (2) by the beam node connecting plate (12) and the beam node ribbed connecting plate (13). The beam node connecting plate (12) and the beam node ribbed connecting plate (13) are both reserved with mounting holes. The H-beam (5) can be fixed by passing the beam node high-strength through bolts (14) through the mounting holes and tightening them, thereby improving the overall integrity of the structure and the stability of the node, and realizing the effective distribution and transmission of load.

8. A structure for reinforcing an ancient stone arch bridge using prefabricated steel sections, as described in claim 7, is characterized in that... The beam node connecting plate (12) is set on the upper part of the end connecting node of the H-beam beam (5), and the beam node ribbed connecting plate (13) is set on the lower part of the connecting node to improve the rigidity of the node and alleviate stress concentration.

9. A structure for reinforcing an ancient stone arch bridge using prefabricated steel sections according to claim 1, characterized in that, The two ends of the longitudinal connecting beam (9) of the angle steel are respectively passed through the reserved installation holes of the stiffening plate (10) of the connecting beam node on the two adjacent H-shaped steel curved arch rings (1) by connecting beam high-strength bolts (11) and tightened to realize the connection of the two adjacent reinforcement modules.

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