Anti-overturning reinforcing device for single-column pier of bridge

Abstract

The utility model relates to the technical field of bridge engineering, in particular to an anti-overturning reinforcing device for a single-column pier of a bridge. The anti-overturning reinforcing device for the single-column pier of the bridge comprises a steel cover beam and a height-adjusting and leveling support, the steel cover beams are symmetrically fixed to the two sides of the tops of the pier columns in the transverse bridge direction, each steel cover beam comprises a horizontal cantilever section and a vertical connecting section, and the vertical connecting sections are fixedly connected with the side walls of the pier columns through anchor bolt assemblies. The height and leveling support is installed on the top of a horizontal cantilever section of the steel cover beam, and an upper connecting plate of the height and leveling support is fixed to a leveling steel plate embedded in the bottom face of the box beam in a welded mode. The leveling steel plate is fixed to the bottom face of the box girder through structural adhesive and anchor bolts, and an initial pre-tightening force adjusting mechanism is arranged between the leveling steel plate and the upper connecting plate. Through the structural combination of transverse expansion supporting of the steel cover beam, self-adaptive close attachment of the height-adjusting and leveling support and composite anchoring of the anchor bolts and the adhesive, the light weight and adjustability of the reinforcing device are achieved, and the construction process can be simplified while the anti-overturning capacity is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, and more specifically, to a bridge single-column pier anti-overturning reinforcement device. Background Technology

[0002] Traditional single-column pier bridges are prone to overturning under overload or eccentric loading due to their single lateral support. Existing reinforcement methods mostly involve adding concrete cap beams or external prestressing, which have problems such as long construction periods, significant traffic disruption, and increased structural weight. In addition, ordinary bearings cannot adapt to beam deformation and construction errors, leading to bearing failure and affecting load-bearing performance. Therefore, there is an urgent need for a lightweight, adjustable reinforcement device that simplifies the construction process while ensuring overturning resistance. Utility Model Content

[0003] The purpose of this utility model is to provide a bridge single-column pier anti-overturning reinforcement device, which can achieve lightweight and adjustable reinforcement device, and simplify the construction process while ensuring anti-overturning capacity.

[0004] This utility model provides a bridge single-column pier anti-overturning reinforcement device, including a steel cap beam and height-adjusting and leveling supports;

[0005] The steel cap beam is symmetrically fixed to both sides of the top of the pier column in the transverse direction. The steel cap beam includes a horizontal cantilever section and a vertical connecting section. The vertical connecting section is fixedly connected to the side wall of the pier column through an anchor bolt assembly.

[0006] The height-adjusting and leveling support is installed on the top of the horizontal cantilever section of the steel cap beam, and the upper connecting plate of the height-adjusting and leveling support is fixed to the leveling steel plate pre-embedded on the bottom surface of the box beam by welding.

[0007] The leveling steel plate is fixed to the bottom surface of the box girder by structural adhesive and anchor bolts, and an initial preload adjustment mechanism is provided between the leveling steel plate and the upper connecting plate.

[0008] In an optional embodiment, the horizontal cantilever section and the vertical connecting section of the steel cap beam are welded to form an L-shaped cross section, and stiffening ribs are provided at the ends of the horizontal cantilever section, with the stiffening ribs arranged perpendicular to the cantilever direction.

[0009] In an optional embodiment, the anchor assembly includes multiple rows of chemical anchors arranged along the height of the pier column, each row of chemical anchors passing through a reserved hole in the vertical connection section of the steel cap beam and locked in place by nuts.

[0010] In an optional embodiment, the reserved hole is an oblong hole, with its major axis parallel to the axis of the pier column.

[0011] In an optional embodiment, the initial preload adjustment mechanism includes a screw, an adjusting nut, and a pressure sensor. The screw vertically penetrates the leveling steel plate and the upper connecting plate, and the pressure sensor is located between the adjusting nut and the upper connecting plate.

[0012] In an optional embodiment, the height-adjusting and leveling support is a pot-type support, and its lower connecting plate is fixed to the top surface of the steel cap beam by bolts. The bottom surface of the lower connecting plate is provided with an anti-slip boss, and the top surface of the steel cap beam is provided with a matching groove at the corresponding position.

[0013] In an optional embodiment, the surface of the steel cap beam is provided with a composite anti-corrosion coating, which includes an epoxy zinc-rich primer layer, an epoxy micaceous iron oxide intermediate paint layer, and a fluorocarbon topcoat layer arranged sequentially from the inside out.

[0014] In an optional embodiment, the leveling steel plate is a rectangular steel plate with rounded corners at its four corners and anchor bolt holes evenly spaced along its length, the anchor bolt holes being filled with structural adhesive.

[0015] In an optional embodiment, the horizontal cantilever section of the steel cap beam is provided with an anti-collision limiting block at its end, and there is a gap between the anti-collision limiting block and the web of the box girder.

[0016] In an optional embodiment, a stress monitoring module is provided in the connection area between the pier and the steel cap beam. The stress monitoring module includes a fiber optic grating sensor embedded in the pier and a strain gauge fixed on the surface of the steel cap beam.

[0017] The beneficial effects of this utility model embodiment are:

[0018] By combining the structural features of lateral expansion support of steel cap beams, adaptive close-fitting height and leveling supports, and composite anchoring of anchor bolts and adhesives, the system systematically solves the pain points of high overturning risk, long construction period, and difficult maintenance of single-column pier bridges. It achieves lightweight and adjustable reinforcement devices, simplifies the construction process while ensuring overturning resistance, and has synergistic optimization functions of safety, efficiency, durability, and easy maintenance. It is suitable for rapid reinforcement of bridges in busy urban traffic areas. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram showing the location of the anti-overturning reinforcement device for a single-column bridge pier provided in this embodiment of the utility model;

[0021] Figure 2 for Figure 1 Side view;

[0022] Figure 3 for Figure 2 AA section view;

[0023] Figure 4 A schematic diagram of the steel cap beam of the bridge single-column pier anti-overturning reinforcement device provided in this embodiment of the utility model;

[0024] Figure 5 for Figure 4 Top view.

[0025] Icons: 1-Bridge; 2-Steel cap beam; 3-Pier column; 4-Height and leveling support; 5-Vertical connection section; 6-Horizontal cantilever section; 7-Connecting plate; 8-Leveling steel plate; 9-Stiffening rib plate. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The following is combined with Figures 1-5 The following describes some embodiments of the present invention in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] This utility model provides a bridge single-column pier anti-overturning reinforcement device, including a steel cap beam 2 and a height-adjusting and leveling support 4; the steel cap beam 2 is symmetrically fixed to both sides of the top of the pier column 3 in the transverse direction, and the steel cap beam 2 includes a horizontal cantilever section 6 and a vertical connecting section 5. The vertical connecting section 5 is fixedly connected to the side wall of the pier column 3 by an anchor bolt assembly; the height-adjusting and leveling support 4 is installed on the top of the horizontal cantilever section 6 of the steel cap beam 2, and the upper connecting plate 7 of the height-adjusting and leveling support 4 is fixed to the leveling steel plate 8 pre-embedded in the bottom surface of the box girder by welding; the leveling steel plate 8 is fixed to the bottom surface of the box girder by structural adhesive and anchor bolts, and an initial preload adjustment mechanism is provided between the leveling steel plate 8 and the upper connecting plate 7.

[0034] The steel cap beam 2 is symmetrically fixed to both sides of the top of the pier 3 in the transverse direction. Its specific structure includes a horizontal cantilever section 6 and a vertical connecting section 5. The vertical connecting section 5 is fixedly connected to the side wall of the pier 3 by anchor bolt assemblies, thereby ensuring a stable connection between the steel cap beam 2 and the pier 3.

[0035] The height-adjusting and leveling support 4 is installed on top of the horizontal cantilever section 6 of the steel cap beam 2 to support the bridge superstructure. The upper connecting plate 7 of the height-adjusting and leveling support 4 is fixed to the leveling steel plate 8 pre-embedded in the bottom surface of the box girder by welding. The leveling steel plate 8 is fixed to the bottom surface of the box girder by structural adhesive and anchor bolts to ensure the firmness of the connection.

[0036] In addition, an initial preload adjustment mechanism is provided between the leveling steel plate 8 and the upper connecting plate 7 to adjust the initial reaction force of the support during installation, ensuring the close fit between the support and the bottom surface of the box girder, thereby improving the bridge's overturning resistance.

[0037] During the actual construction process, the top of pier 3 was first cleaned and ground to ensure the flatness and cleanliness of the installation area of ​​steel cap beam 2. Then, the vertical connecting section 5 of steel cap beam 2 was fixed to the side wall of pier 3 using anchor bolt assemblies. The anchor bolt assemblies included high-strength bolts and matching anchoring adhesive to ensure the reliability and durability of the connection. After the steel cap beam 2 was installed, the height adjustment and leveling support 4 was installed, and the upper connecting plate 7 of the support was fixed to the leveling steel plate 8 pre-embedded on the bottom surface of the box girder by welding.

[0038] The installation of the leveling steel plate 8 requires ensuring a tight fit with the bottom surface of the box girder, secured by structural adhesive and anchor bolts. An appropriate preload is applied between the leveling steel plate 8 and the upper connecting plate 7 using an initial preload adjustment mechanism to ensure that the initial reaction force of the support after installation meets design requirements.

[0039] This design not only improves the bridge's resistance to overturning, but also ensures the stability and reliability of the supports during long-term use.

[0040] Through the above-described structure and installation method, the bridge single-column pier anti-overturning reinforcement device of this utility model can effectively improve the anti-overturning performance of the bridge. At the same time, it is easy to construct and has little impact on the normal use of the bridge, thus having high practicality and economy.

[0041] In an optional embodiment, the horizontal cantilever section 6 and the vertical connecting section 5 of the steel cap beam 2 are welded to form an L-shaped cross section, and the end of the horizontal cantilever section 6 is provided with a stiffening rib 9, which is arranged perpendicular to the cantilever direction.

[0042] In this embodiment, the horizontal cantilever section 6 and the vertical connecting section 5 of the steel cap beam 2 are welded together to form an L-shaped cross-section. This arrangement not only improves the overall stability of the steel cap beam 2 but also facilitates its connection with the pier column 3. To further enhance the load-bearing capacity and torsional resistance of the steel cap beam 2, stiffening ribs 9 are provided at the ends of the horizontal cantilever section 6, and the stiffening ribs 9 are arranged perpendicular to the cantilever direction.

[0043] This vertical arrangement can effectively improve the compressive strength and local stability of the two ends of the steel cap beam, and prevent buckling during the stress process.

[0044] In the actual construction process, the vertical connecting section 5 of the steel cap beam 2 is fixedly connected to the side wall of the pier column 3 through anchor bolt assembly to ensure the firmness and reliability of the connection.

[0045] The height-adjusting and leveling support 4 is installed on the top of the horizontal cantilever section 6 of the steel cap beam 2 to support the bridge superstructure. The upper connecting plate 7 of the support is fixed to the leveling steel plate 8 embedded in the bottom surface of the box girder by welding. The leveling steel plate 8 is fixed to the bottom surface of the box girder by structural adhesive and anchor bolts.

[0046] In addition, an initial preload adjustment mechanism is provided between the leveling steel plate 8 and the upper connecting plate 7 to adjust the initial reaction force of the support and ensure the close fit between the support and the bottom surface of the box girder.

[0047] In an optional embodiment, the anchor assembly includes multiple rows of chemical anchors arranged along the height of the pier column 3. Each row of chemical anchors passes through a reserved hole in the vertical connecting section 5 of the steel cap beam 2 and is locked in place by a nut.

[0048] In this embodiment, the vertical connecting section 5 is fixedly connected to the side wall of the pier 3 via an anchor bolt assembly. The anchor bolt assembly includes multiple rows of chemical anchor bolts arranged along the height direction of the pier 3. Each row of chemical anchor bolts passes through a reserved hole in the vertical connecting section 5 of the steel cap beam 2 and is locked in place by a nut.

[0049] Chemical anchors have high strength and good durability, and can effectively resist fatigue loads and corrosion during long-term use.

[0050] The arrangement of the chemical anchors was carefully designed to ensure the connection strength between the steel cap beam 2 and the pier 3. Each row of chemical anchors is evenly distributed along the height of the pier 3, and the spacing between adjacent rows is optimized based on the bearing capacity of the pier 3 and the stress condition of the steel cap beam 2. By rationally arranging the chemical anchors, the load can be effectively distributed, avoiding local stress concentration, thereby improving the stability and reliability of the entire reinforcement device.

[0051] In an optional embodiment, the reserved hole is an oblong hole, with its long axis parallel to the axis of the pier column 3.

[0052] In this embodiment, the reserved hole in the vertical connecting section 5 of the steel cap beam 2 is an oblong hole, with its major axis parallel to the axis of the pier column 3. The design of the oblong hole allows for fine-tuning of the anchor bolt position during construction, thereby improving the flexibility and accuracy of installation.

[0053] This setup is particularly suitable for adjusting for errors that may occur during construction, ensuring that the anchor bolts can be accurately connected to the pier column 3.

[0054] The dimensions of the oblong holes were precisely calculated to ensure that installation accuracy requirements were met without affecting the structural strength of the steel cap beam 2. The major axis of the oblong holes is parallel to the axis of the pier column 3. This arrangement effectively distributes the load and avoids structural damage caused by localized stress concentration.

[0055] In this embodiment, the design of the elongated hole also allows for fine-tuning of the anchor bolt position during construction, thereby improving the flexibility and accuracy of installation.

[0056] In an optional embodiment, the initial preload adjustment mechanism includes a screw, an adjusting nut, and a pressure sensor. The screw vertically penetrates the leveling steel plate 8 and the upper connecting plate 7, and the pressure sensor is located between the adjusting nut and the upper connecting plate 7.

[0057] In this embodiment, the upper connecting plate 7 of the height-adjusting and leveling support 4 is fixed to the leveling steel plate 8 pre-embedded in the bottom surface of the box girder by welding. The leveling steel plate 8 is fixed to the bottom surface of the box girder by structural adhesive and anchor bolts, and an initial preload adjustment mechanism is provided between the leveling steel plate 8 and the upper connecting plate 7. The initial preload adjustment mechanism includes a screw, an adjusting nut, and a pressure sensor. The screw vertically penetrates the leveling steel plate 8 and the upper connecting plate 7, and the pressure sensor is located between the adjusting nut and the upper connecting plate 7.

[0058] This setup allows for precise adjustment of the initial reaction force of the support during installation, ensuring a tight fit between the support and the bottom surface of the box girder. The combination of the screw and adjusting nut allows construction workers to adjust the initial reaction force of the support by rotating the nut, while the pressure sensor monitors the magnitude of the reaction force in real time to ensure it meets design requirements.

[0059] This setup not only improves installation accuracy but also reduces the risk of insufficient or excessive reaction force preventing the support from adhering tightly to the bottom of the box girder.

[0060] In an optional embodiment, the height-adjusting and leveling support 4 is a pot-type support, and its lower connecting plate 7 is fixed to the top surface of the steel cap beam 2 by bolts. The bottom surface of the lower connecting plate 7 is provided with an anti-slip boss, and the top surface of the steel cap beam 2 is provided with a matching groove at the corresponding position.

[0061] In this embodiment, the height-adjusting and leveling support 4 is a pot-type support, and its lower connecting plate 7 is fixed to the top surface of the steel cap beam 2 by bolts. The bottom surface of the lower connecting plate 7 is provided with an anti-slip boss, and the top surface of the steel cap beam 2 is provided with a matching groove at the corresponding position. This configuration can effectively prevent the support from slipping during use and improve the stability and reliability of the support.

[0062] The lower connecting plate 7 of the pot bearing is fixedly connected to the top surface of the steel cap beam 2 using high-strength bolts. This connection method is not only robust and reliable but also facilitates installation and maintenance. The anti-slip boss design effectively prevents the bearing from slipping due to external forces during use, further improving the bearing's stability. Furthermore, the groove on the top surface of the steel cap beam 2 matches the anti-slip boss, ensuring that the bearing fits tightly against the surface of the steel cap beam 2, thereby improving the reliability of the entire reinforcement device.

[0063] In an optional embodiment, the surface of the steel cap beam 2 is provided with a composite anti-corrosion coating, which includes an epoxy zinc-rich primer layer, an epoxy micaceous iron oxide intermediate paint layer and a fluorocarbon topcoat layer arranged sequentially from the inside to the outside.

[0064] In this embodiment, the surface of the steel cap beam 2 is provided with a composite anti-corrosion coating, which includes, from the inside out, an epoxy zinc-rich primer layer, an epoxy micaceous iron oxide intermediate paint layer, and a fluorocarbon topcoat layer.

[0065] This composite anti-corrosion coating can effectively improve the durability and corrosion resistance of the steel cap beam 2, and extend its service life.

[0066] The construction process of composite anti-corrosion coatings is strictly carried out in accordance with specifications to ensure the quality and performance of the coating.

[0067] Before construction, the surface of steel cap beam 2 was sandblasted to meet the Sa2.5 standard to ensure that the surface roughness and cleanliness meet the requirements.

[0068] Epoxy zinc-rich primer is used as the bottom coating and is sprayed to evenly cover the surface of the steel cap beam 2, forming a protective layer with a thickness of about 80 micrometers.

[0069] Epoxy micaceous iron oxide intermediate paint, as the second coating layer, further enhances the protective performance of the coating and improves its durability.

[0070] Fluorocarbon topcoat, as the outermost coating, has excellent weather resistance, UV resistance, and chemical corrosion resistance, providing long-term protection for the steel cap beam 2.

[0071] In an optional embodiment, the leveling steel plate 8 is a rectangular steel plate with rounded corners at its four corners and equally spaced anchor bolt holes along its length, the anchor bolt holes being filled with structural adhesive.

[0072] In this embodiment, the leveling steel plate 8 is a rectangular steel plate with rounded corners at its four corners and equally spaced anchor bolt holes along its length, the anchor bolt holes being filled with structural adhesive.

[0073] This setup ensures a firm connection between the leveling steel plate 8 and the bottom surface of the box girder, while also improving the reliability and durability of the connection.

[0074] In this embodiment, the dimensions and thickness of the leveling steel plate 8 are optimized based on the actual dimensions and stress conditions of the bottom surface of the box girder.

[0075] The alignment steel plate is made of high-strength steel to ensure that it has sufficient load-bearing capacity; the rounded corners not only improve the aesthetics of the steel plate, but also reduce stress concentration and lower the risk of cracking caused by excessive local stress; the anchor bolt holes distributed at equal intervals along the length direction can ensure the uniform distribution of anchor bolts, so that the load is evenly transferred to the bottom surface of the box girder.

[0076] In an optional embodiment, the horizontal cantilever section 6 of the steel cap beam 2 is provided with an anti-collision limiting block at its end, and there is a gap between the anti-collision limiting block and the web of the box girder.

[0077] In this embodiment, the horizontal cantilever section 6 of the steel cap beam 2 is provided with an anti-collision limiting block at its end, and there is a gap between the anti-collision limiting block and the web of the box girder.

[0078] This design effectively prevents serious damage to the structure of Bridge 1 in the event of accidents such as vehicle collisions, thereby improving the safety of Bridge 1.

[0079] The design of the anti-collision limit block takes into account the impact force during a vehicle collision and the load-bearing capacity of the bridge structure. The limit block is made of high-strength concrete or steel and has good impact resistance.

[0080] In this embodiment, the shape and size of the limiting block are optimized according to the actual needs of bridge 1 to ensure that it can effectively absorb and disperse the impact force during vehicle collision and protect the structure of bridge 1 from serious damage.

[0081] In an optional embodiment, a stress monitoring module is provided in the connection area between the pier 3 and the steel cap beam 2. The stress monitoring module includes a fiber optic grating sensor embedded in the pier 3 and a strain gauge fixed on the surface of the steel cap beam 2.

[0082] In this embodiment, a stress monitoring module is provided in the connection area between the pier column 3 and the steel cap beam 2. The module includes a fiber optic grating sensor embedded in the pier column 3 and a strain gauge fixed on the surface of the steel cap beam 2.

[0083] This setup allows for real-time monitoring of the stress state of Bridge 1, providing a scientific basis for its maintenance and management.

[0084] The stress monitoring module can monitor stress changes in the connection area between pier 3 and steel cap beam 2 in real time.

[0085] A fiber optic grating sensor is embedded inside the pier column 3, enabling precise measurement of the stress distribution within the pier column 3. Strain gauges are fixed to the surface of the steel cap beam 2, allowing real-time monitoring of the surface strain of the steel cap beam 2.

[0086] By combining these two types of sensors, a comprehensive understanding of the stress state of the bridge structure can be obtained, providing a scientific basis for bridge safety assessment and maintenance.

[0087] The beneficial effects of this utility model embodiment are:

[0088] By combining the structural combination of lateral extension support of steel cap beam 2, adaptive close fitting of height and leveling support 4, and composite anchoring of anchor bolts and adhesive, the pain points of single-column pier bridges such as high overturning risk, long construction period, and difficult maintenance are systematically solved. The reinforcement device is lightweight and adjustable, which can simplify the construction process while ensuring overturning resistance. It also has the synergistic optimization function of safety, efficiency, durability and easy maintenance, and is suitable for the rapid reinforcement of bridges in busy urban traffic areas.

[0089] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bridge single-column pier anti-overturning reinforcement device, characterized in that, This includes steel cap beams and height-adjusting and leveling supports; The steel cap beam is symmetrically fixed to both sides of the top of the pier column in the transverse direction. The steel cap beam includes a horizontal cantilever section and a vertical connecting section. The vertical connecting section is fixedly connected to the side wall of the pier column through an anchor bolt assembly. The height-adjusting and leveling support is installed on the top of the horizontal cantilever section of the steel cap beam, and the upper connecting plate of the height-adjusting and leveling support is fixed to the leveling steel plate pre-embedded on the bottom surface of the box beam by welding. The leveling steel plate is fixed to the bottom surface of the box girder by structural adhesive and anchor bolts, and an initial preload adjustment mechanism is provided between the leveling steel plate and the upper connecting plate.

2. The bridge single-column pier anti-overturning reinforcement device according to claim 1, characterized in that, The horizontal cantilever section and the vertical connecting section of the steel cap beam are welded to form an L-shaped cross section. The end of the horizontal cantilever section is provided with stiffening ribs, which are arranged perpendicular to the cantilever direction.

3. The bridge single-column pier anti-overturning reinforcement device according to claim 1, characterized in that, The anchor assembly includes multiple rows of chemical anchors arranged along the height of the pier column. Each row of chemical anchors passes through a reserved hole in the vertical connection section of the steel cap beam and is locked in place by a nut.

4. The bridge single-column pier anti-overturning reinforcement device according to claim 3, characterized in that, The reserved hole is an oblong hole, with its long axis parallel to the axis of the pier column.

5. The bridge single-column pier anti-overturning reinforcement device according to claim 1, characterized in that, The initial preload adjustment mechanism includes a screw, an adjusting nut, and a pressure sensor. The screw vertically penetrates the leveling steel plate and the upper connecting plate, and the pressure sensor is located between the adjusting nut and the upper connecting plate.

6. The bridge single-column pier anti-overturning reinforcement device according to claim 1, characterized in that, The height-adjusting and leveling support is a pot-type support, and its lower connecting plate is fixed to the top surface of the steel cap beam by bolts. The bottom surface of the lower connecting plate is provided with anti-slip protrusions, and the top surface of the steel cap beam is provided with matching grooves at corresponding positions.

7. The bridge single-column pier anti-overturning reinforcement device according to claim 1, characterized in that, The surface of the steel cap beam is provided with a composite anti-corrosion coating, which includes an epoxy zinc-rich primer layer, an epoxy micaceous iron oxide intermediate paint layer, and a fluorocarbon topcoat layer arranged sequentially from the inside to the outside.

8. The bridge single-column pier anti-overturning reinforcement device according to claim 1, characterized in that, The leveling steel plate is a rectangular steel plate with rounded corners at its four corners and equally spaced anchor bolt holes along its length, which are filled with structural adhesive.

9. The bridge single-column pier anti-overturning reinforcement device according to claim 1, characterized in that, The horizontal cantilever section of the steel cap beam is provided with an anti-collision limiting block at its end, and there is a gap between the anti-collision limiting block and the web of the box girder.

10. The bridge single-column pier anti-overturning reinforcement device according to claim 1, characterized in that, A stress monitoring module is provided in the connection area between the pier and the steel cap beam. The stress monitoring module includes a fiber optic grating sensor embedded in the pier and a strain gauge fixed on the surface of the steel cap beam.

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