Prefabricated assembly type beam bridge reinforcing system and method
By adding a reinforcement device of a steel-concrete composite structure and a micro-expanding self-compacting concrete filling layer to the bridge, load transfer is achieved, which solves the problems of insufficient durability and bearing capacity of existing bridge reinforcement methods and achieves efficient reinforcement and rapid construction of the bridge.
Patent Information
- Application Number
- CN202511085281.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-04
- Publication Date
- 2025-09-23
AI Technical Summary
Existing bridge reinforcement methods have poor durability and limited load-bearing capacity, making it difficult to meet the needs of overweight vehicles and harsh environments, and causing great damage to the original beam structure.
A prefabricated and assembled beam bridge reinforcement system is adopted. By adding a reinforcement device between the two original beams of the beam bridge, a steel-concrete composite structure and a micro-expanding self-compacting concrete filling layer are used to form an integral connection between the new beam and the original beam, realizing load transfer, and coordinated force bearing of the new and old structures is achieved through rivets and diaphragms.
It significantly improves the bearing capacity and service life of the bridge, reduces damage to the original beam, and has a fast construction process with little interference to traffic, making it suitable for rapid reinforcement scenarios such as highways.
Smart Images
Figure CN120683813A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of bridge reinforcement, and in particular relates to a prefabricated assembled beam bridge reinforcement system and method. Background Art
[0002] With the rapid development of transportation, traffic volume is increasing day by day, and vehicle loads are significantly increasing. During use, the operation performance of bridges is continuously deteriorating due to the operation of overweight vehicles, harsh environmental conditions, and the influence of various external factors. As a result, many bridges built in earlier years are in a diseased and overloaded working state, and cracks, breakage, peeling and other defects have appeared on the surface of the bridge main beams. At present, a large number of bridge structures in operating highway bridges are prefabricated and assembled beam bridges. Since these bridges were built earlier, they are now in a period of high incidence of defects, resulting in the need for reinforcement of a large number of operating highway bridges. Existing reinforcement methods such as gluing steel plates, gluing fiber composite materials, and external prestressing cause significant damage to the original beam structure and it is difficult to ensure durability. In terms of reinforcement effect, the improvement in the bearing capacity of the beam after reinforcement using existing reinforcement methods is still limited.
[0003] Therefore, the current bridge reinforcement methods still have great limitations, and there is an urgent need for a bridge reinforcement solution with good durability, high bearing capacity, and conducive to standardized production and construction. Summary of the Invention
[0004] In order to solve the above problems existing in the prior art, the present invention provides a prefabricated and assembled beam bridge reinforcement system and method. The technical problem to be solved by the present invention is achieved through the following technical solutions: The present invention provides a prefabricated and assembled beam bridge reinforcement system, comprising: a plurality of reinforcement devices, each of which is arranged between any two beam bodies of the beam bridge to be reinforced and connected to the cross diaphragm of the beam bridge to be reinforced; the upper end of the reinforcement device abuts against the bottom of the main beam flange plate of the beam bridge to be reinforced and is connected by rivets, the rivets are prefabricated on the top of the reinforcement device, and the reinforcement device is filled with micro-expanding self-compacting concrete.
[0005] In one embodiment of the present invention, each of the reinforcement devices includes: a reinforcement beam body, the upper end of which abuts against the bottom of the main beam flange plate of the beam bridge to be reinforced and is connected by rivets; the rivets are prefabricated at the top of the reinforcement beam body, and the reinforcement beam body is filled with micro-expanding self-compacting concrete.
[0006] In one embodiment of the present invention, at least one of the reinforced beams includes: a first steel box and a strip steel plate, two first steel boxes are provided, and the two first steel boxes are arranged at both ends of the strip steel plate in the vertical direction, and the upper end of the first steel box located at the top abuts against the bottom of the main beam flange plate of the beam bridge to be reinforced and is connected by rivets; wherein the rivets are prefabricated at the upper end of the first steel box located at the top, and the two first steel boxes are filled with slightly expanding self-compacting concrete.
[0007] In one embodiment of the present invention, at least one of the reinforced beams includes: a second steel box, which is arranged in a vertical direction, with its upper end abutting against the bottom of the main beam flange plate of the beam bridge to be reinforced and connected by rivets; wherein the rivets are prefabricated at the upper end of the second steel box, and the second steel box is filled with slightly expanding self-compacting concrete.
[0008] In one embodiment of the present invention, at least one of the reinforced beams includes: a third steel box and a T-shaped steel plate, the T-shaped steel plate includes an extended end and a plane end perpendicular to the extended end; the third steel box is connected to the extended end of the T-shaped steel plate, and the plane end of the T-shaped steel plate is located at the bottom or the top; when the plane end is located at the bottom, the upper end of the third steel box abuts against the bottom of the main beam flange plate of the beam bridge to be reinforced and is connected by rivets; when the plane end is located at the top, the third steel box is located at the bottom, the plane end abuts against the bottom of the main beam flange plate of the beam bridge to be reinforced and is connected to the flange plate by rivets; wherein the rivet is prefabricated at the third steel box or the upper end of the plane end, and the third steel box is filled with micro-expanding self-compacting concrete.
[0009] In one embodiment of the present invention, the surfaces of the connection locations between all the reinforced beams and the beam bridge to be reinforced are coated with epoxy mortar.
[0010] In one embodiment of the present invention, all of the reinforced beams are provided with a plurality of stiffening ribs arranged at intervals.
[0011] In one embodiment of the present invention, at least one of the reinforcement devices further includes: a support and a jack, wherein the support is arranged at the bottom of both ends of the reinforcement beam; the jack is arranged at the bottom of the support and the top of the reinforcement device for applying a lifting force.
[0012] In one embodiment of the present invention, the support includes a lower pad, a rubber support, a spherical hinge and an upper pad arranged in sequence from bottom to top, and the lower pad is provided with a support slide groove; the upper pad and the spherical hinge are movably connected through a hinge structure on the spherical surface.
[0013] The present invention also provides a method for reinforcing a prefabricated and assembled beam bridge, using the above-mentioned prefabricated and assembled beam bridge reinforcement system, the reinforcement method includes: Step 1: Prefabricate or weld on-site to form a local structure of the reinforced beam, and assemble on-site by welding to form multiple reinforced beams; Step 2: Partially chisel away the diaphragms at the reinforcement locations of the beam bridge to be reinforced and clean the connection surfaces to form multiple groups of reinforcement gaps, chisel away the concrete on the main beam flange plates at the reinforcement locations and drill rivet holes; Step 3: hoisting the plurality of reinforced beams to the plurality of reinforced gaps, and evenly coating the tops of the reinforced beams with epoxy mortar. After the plurality of reinforced beams are lifted to the designed heights by the jacks at the bottom of the supports, the support pads are poured and cured to the designed strength. Step 4: applying a lifting force to the bottom of the main beam flange plate of the beam bridge to be reinforced at the top of the plurality of reinforced beams through the jack; Step 5: pouring slightly expansive self-compacting concrete into all the reinforced beams, and connecting the rivet holes through prefabricated rivets on the reinforced beams to fix the beam bridge to be reinforced and all the reinforced beams; Step 6: Epoxy mortar is applied to all connection positions between the reinforced beam body and the beam bridge to be reinforced, and the removed positions of the main beam flange plate and the diaphragm are recast to complete the reinforcement of the prefabricated assembled beam bridge.
[0014] Compared with the prior art, the present invention has the following beneficial effects: The prefabricated, assembled bridge reinforcement system of the present invention incorporates a reinforcement device between the two existing beams of the bridge to be reinforced. The reinforcement device is a composite steel-concrete structure. The reinforcement device acts as the additional beam, and a cross-diaphragm and rivets connect the new beam to the bridge to be reinforced. This allows the additional beam to actively share the dead and live loads of the bridge to be reinforced. This load-transfer mechanism fundamentally changes the passive load-bearing mode of traditional reinforcement techniques, which only provide local reinforcement. This significantly increases the overall bearing capacity of the bridge while avoiding damage to the original beams.
[0015] The present invention effectively suppresses the risk of interface peeling and corrosion through the synergistic effect of the micro-expanding self-compacting concrete filling layer and the steel box in the reinforcement device, and significantly extends the service life of the reinforced structure.
[0016] The prefabricated and assembled beam bridge reinforcement method of this invention utilizes a prefabricated process involving factory prefabrication, on-site assembly, and on-site jacking, loading, and pouring. The steel box segments are manufactured using a standardized layout to ensure quality control. Multiple jacks apply jacking forces, ensuring that the newly added beams are subjected to loads before concrete is poured. Construction requires only partial processing of the diaphragms and flanges, significantly reducing on-site work time and significantly minimizing disruption to normal bridge traffic. This method is particularly suitable for reinforcement in highways and other areas requiring rapid traffic flow.
[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a structural diagram of an existing beam bridge to be reinforced (T-beam); Figure 2 1 is a structural schematic diagram of a prefabricated and assembled beam bridge reinforcement system provided by an embodiment of the present invention; Figure 3 Schematic diagram of the plan layout of the prefabricated and assembled beam bridge reinforcement system provided by an embodiment of the present invention; Figure 4 is a structural schematic diagram of a support provided by an embodiment of the present invention; Figure 5 It is a structural diagram of another existing beam bridge to be reinforced (box girder); Figure 6 is a structural schematic diagram of a reinforced beam provided by an embodiment of the present invention; Figure 7 This is a schematic structural diagram of a first type of reinforced beam provided by an embodiment of the present invention; Figure 8 is a schematic structural diagram of a second reinforced beam provided by an embodiment of the present invention; Figure 9 1 is a schematic structural diagram of a third reinforced beam provided by an embodiment of the present invention; Figure 10 This is a flow chart of a prefabricated assembled beam bridge reinforcement method provided by an embodiment of the present invention.
[0019] Figure numerals: 100-reinforced beam; 111-first steel box; 112-strip steel plate; 121-second steel box; 131-third steel box; 132-T-shaped steel plate; 1321-extension end; 1322-plane end; 141-stiffening rib; 151-micro-expanding self-compacting concrete; 200-rivet; 300-support; 311-lower pad; 312-rubber support; 313-spherical hinge; 314-upper pad; 400-jack. DETAILED DESCRIPTION
[0020] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following is a detailed description of a prefabricated assembled beam bridge reinforcement system and method proposed in accordance with the present invention in combination with the accompanying drawings and specific implementation methods.
[0021] The aforementioned and other technical contents, features, and effects of the present invention are clearly presented in the following detailed description of the specific embodiments in conjunction with the accompanying drawings. Through the description of the specific embodiments, a deeper and more specific understanding of the technical means and effects adopted by the present invention to achieve the intended purpose can be obtained. However, the accompanying drawings are provided for reference and illustration purposes only and are not intended to limit the technical solutions of the present invention.
[0022] Example 1 like Figure 1 As shown, Figure 1 This is a structural diagram of an existing beam bridge to be reinforced (T beam); the present invention provides a prefabricated assembled beam bridge reinforcement system, which adds a beam structure between the two beams of the beam bridge to be reinforced, such as Figure 2 As shown, Figure 2 It is a structural schematic diagram of a prefabricated assembled beam bridge reinforcement system provided by an embodiment of the present invention.
[0023] In this embodiment, the prefabricated and assembled beam bridge reinforcement system includes: multiple reinforcement devices, each reinforcement device is arranged between any two beams of the beam bridge to be reinforced, and is connected to the cross-partition of the beam bridge to be reinforced; the upper end of the reinforcement device abuts against the bottom of the main beam flange plate of the beam bridge to be reinforced and is connected through rivets 200, the rivets 200 are prefabricated on the top of the reinforcement device, and the reinforcement device is filled with micro-expanding self-compacting concrete 151.
[0024] Specifically, each reinforcement device includes a reinforcement beam 100, the upper end of which abuts the bottom of the main beam flange plate of the bridge to be reinforced and is connected via rivets 200. The rivets 200 are prefabricated at the top of the reinforcement beam 100, and the reinforcement beam 100 is filled with slightly expansive self-compacting concrete 151. Exemplarily, a hole is reserved in the reinforcement beam 100 for filling with the slightly expansive self-compacting concrete 151.
[0025] It is worth noting that after reinforcement, the dead load and live load of the reinforced beam bridge are jointly borne by the original structure and the newly added reinforced beam body 100. By partially transferring the dead load and live load of the original structure to the newly added beam body structure, the load effect of the original structure is reduced, the bearing capacity of the original structure can be greatly improved, and the service life of the bridge can be extended.
[0026] like Figure 3 As shown, Figure 3 It is a schematic diagram of the plan layout of the prefabricated assembled beam bridge reinforcement system provided by an embodiment of the present invention.
[0027] In an optional embodiment, at least one reinforcement device further includes: supports 300 and jacks 400. The supports 300 are disposed at the bottom ends of the reinforcement beam 100; and the jacks 400 are disposed at the bottom of the supports 300 and the top of the reinforcement device to apply a lifting force. For example, the jacks 400 are disposed at the top of the reinforcement beam 100 and are symmetrically arranged at the mid-span.
[0028] like Figure 4 As shown, Figure 4 It is a structural diagram of the support provided by an embodiment of the present invention. For example, the support 300 includes a lower pad 311, a rubber support 312, a spherical hinge 313 and an upper pad 314 arranged in sequence from bottom to top. The lower pad 311 is provided with a support slide to meet the longitudinal and transverse sliding of the bridge; the upper pad 314 and the spherical hinge 313 are movably connected by a hinge structure with a spherical surface. In this way, during the reinforcement process, it can adapt to the slope of the main beam flange plate of the beam bridge to be reinforced, and achieve a reasonable force and reinforcement effect. During the construction process, a jack 400 is used to lift the bottom of the lower pad 311 to meet the design lifting force requirements and lift the newly added reinforced beam 100 to the design height. It is then fixed with leveling bolts, and then the support pad stone is poured and cured to the design strength.
[0029] It is understandable that the above is only for the case where the beam bridge to be reinforced is a T beam as an illustration, and the prefabricated assembled beam bridge reinforcement system of the present invention can also be used when the beam bridge to be reinforced is a box beam, such as Figure 5 As shown, Figure 5 This is a structural diagram of another existing beam bridge to be reinforced (box girder), and both can adopt the same structure, so they will not be described in detail.
[0030] The prefabricated, assembled bridge reinforcement system of the present invention incorporates a reinforcement device between the two existing beams of the bridge to be reinforced. The reinforcement device is a composite steel-concrete structure. The reinforcement device acts as the additional beam, and a cross-diaphragm and rivets connect the new beam to the bridge to be reinforced. This allows the additional beam to actively share the dead and live loads of the bridge to be reinforced. This load-transfer mechanism fundamentally changes the passive load-bearing mode of traditional reinforcement techniques, which only provide local reinforcement. This significantly increases the overall bearing capacity of the bridge while avoiding damage to the original beams.
[0031] Example 2 In this embodiment, the reinforcement beam has three different structures, one of which is as follows: Figure 7 As shown, Figure 7This is a schematic diagram of the structure of the first reinforced beam provided by an embodiment of the present invention. The first reinforced beam structure includes: a first steel box 111 and a strip steel plate 112. There are two first steel boxes 111. The two first steel boxes 111 are arranged at both ends of the strip steel plate 112 in the vertical direction. The upper end of the first steel box 111 located at the top abuts against the bottom of the main beam flange plate of the beam bridge to be reinforced and is connected by rivets 200. The rivets 200 are prefabricated at the upper end of the first steel box 111 located at the top. Both first steel boxes 111 are filled with micro-expanding self-compacting concrete 151. The upper and lower first steel boxes 111 and the strip steel plate 112 form an I-shaped structure. In this way, the first steel box 111 can bear the load and be anchored to the main beam flange plate of the beam bridge to be reinforced through the rivets 200, thereby realizing the coordinated deformation of the new and old structures, and reducing the dead weight of the reinforced beam 100, and facilitating concrete pouring and quality inspection.
[0032] like Figure 8 As shown, Figure 8 This is a schematic diagram of the structure of the second reinforced beam provided by an embodiment of the present invention. The second reinforced beam comprises a second steel box 121, which is arranged vertically, with its upper end abutting the bottom of the main beam flange plate of the bridge to be reinforced and connected via rivets 200. Rivets 200 are prefabricated at the upper end of the second steel box 121, which is filled with slightly expansive self-compacting concrete 151. The closed rectangular structure formed by the second steel box 121 and filled with slightly expansive self-compacting concrete 151 utilizes the gaps between the transverse diaphragms of the bridge to be reinforced, provides good overall stability, and effectively suppresses torsional deformation.
[0033] like Figure 9 As shown, Figure 91 is a schematic structural diagram of the third type of reinforced beam provided by an embodiment of the present invention. The third type of reinforced beam comprises: a third steel box 131 and a T-shaped steel plate 132, wherein the T-shaped steel plate 132 comprises an extension end 1321 and a flat end 1322 perpendicular to the extension end 1321; the third steel box 131 is connected to the extension end 1321 of the T-shaped steel plate 132, and the flat end 1322 of the T-shaped steel plate 132 is located at the bottom or the top; when the flat end 1322 is located at the bottom, the upper end of the third steel box 131 abuts the bottom of the main beam flange plate of the beam bridge to be reinforced and is connected via a rivet 200; when the flat end 1322 is located at the top, the third steel box 131 is located at the bottom, the flat end 1322 abuts the bottom of the main beam flange plate of the beam bridge to be reinforced and is connected via a rivet 200; wherein the rivet 200 is prefabricated at the upper end of the third steel box 131 or the flat end 1322, and the third steel box 131 is filled with micro-expanding self-compacting concrete 151. It's worth noting that the third steel box 131 is only located at one end of the T-shaped steel plate 132, which reduces steel usage and reinforcement costs. Furthermore, the open structure of the flat end 1322 of the T-shaped steel plate 132 also reduces volume and facilitates installation. Furthermore, in actual installation, the third steel box 131 can be placed at the top or bottom, with the flat end 1322 of the third steel box 131 correspondingly located at the bottom or top.
[0034] Taking the first reinforced beam structure as an example, the overall structure of the reinforced beam 100 is described. Figure 6 As shown, Figure 6 This is a schematic diagram of the structure of a reinforced beam provided by an embodiment of the present invention. Two first steel boxes 111 extend parallel to the width of the bridge beam to be reinforced. A strip of steel plate 112 is positioned between the two first steel boxes 111. Both first steel boxes 111 are filled with two first steel boxes 111, forming the overall structure of the reinforced beam 100. The top of the reinforced beam 100 is connected to the bottom of the main beam flange plate of the bridge beam to be reinforced via rivets 200.
[0035] At the same time, after the connection, the reinforced beam body 100 is fixed as a whole with the main beam flange plate and the cross diaphragm of the beam bridge to be reinforced by re-pouring concrete, and the surfaces of all connection positions of the reinforced beam body 100 and the beam bridge to be reinforced are coated with epoxy mortar to ensure the surface quality of the connection, and the epoxy mortar is used to form an anti-corrosion sealing layer to block the penetration of moisture and oxygen, so that the overall connection between the new beam body and the beam bridge to be reinforced is achieved through the cross diaphragm, rivets 200 and epoxy mortar.
[0036] In an optional embodiment, all reinforced beams 100 are provided with a plurality of stiffening ribs 141 arranged at intervals.
[0037] The present invention effectively suppresses the risk of interface peeling and corrosion through the synergistic effect of the micro-expanding self-compacting concrete filling layer and the steel box in the reinforcement device, and significantly extends the service life of the reinforced structure.
[0038] Example 3 like Figure 10 As shown, Figure 10 This is a flow chart of a prefabricated assembled beam bridge reinforcement method provided by an embodiment of the present invention.
[0039] The present invention provides a method for reinforcing a prefabricated and assembled beam bridge, using the prefabricated and assembled beam bridge reinforcement system of embodiment 1. The reinforcement method includes: Step 1: Prefabricate or weld on-site to form a local structure of the reinforced beam, and assemble on-site by welding to form multiple reinforced beams.
[0040] For example, a steel box and steel plate structure customized in the factory to a standard segment length can be used. After the local structure of the reinforced beam is formed by assembly and welding, multiple sets of the local structure of the reinforced beam are transported to the construction site, hoisted, assembled and welded at the construction site to form a reinforced beam of the designed length.
[0041] Step 2: Partially chisel out the transverse partitions at the reinforcement position of the beam bridge to be reinforced and clean the connecting surface to form multiple groups of reinforcement gaps. Chisel out the concrete on the main beam flange plate at the reinforcement position and open rivet orientation holes.
[0042] For example, rivet holes are opened by chiseling out concrete. The rivet holes can be set as square holes and need to be re-cast after the reinforced beam is installed in place; similarly, the diaphragm position also needs to be re-cast to connect the reinforced beam and the diaphragm.
[0043] Step 3: Hoist multiple reinforced beams to multiple groups of reinforcement gaps, and evenly apply epoxy mortar on the top of the reinforced beams. After lifting the multiple reinforced beams to the designed height using the jacks at the bottom of the support, cast the support pads and cure them to the designed strength. Step 4: Use jacks to apply lifting force to the bottom of the main beam flange plate of the beam bridge to be reinforced at the top of multiple reinforced beams.
[0044] For example, the jack may be a single-acting self-locking jack, the lifting force of which may be set according to the load requirements of the actual bridge, and the jack may be directly retained in place after the lifting force is applied.
[0045] Step 5: Pour micro-expanding self-compacting concrete into all reinforced beams, and connect the rivet holes through prefabricated rivets on the reinforced beams to fix the beam bridge to be reinforced and all reinforced beams.
[0046] Step 6: Apply epoxy mortar to all connection locations between the reinforced beams and the beam bridge to be reinforced, and recast the removed locations of the main beam flange plates and the cross diaphragms to complete the reinforcement of the prefabricated assembled beam bridge.
[0047] The prefabricated and assembled beam bridge reinforcement method of this invention utilizes a prefabricated process involving factory prefabrication, on-site assembly, and on-site jacking, loading, and pouring. The steel box segments are manufactured using a standardized layout to ensure quality control. Multiple jacks apply jacking forces, ensuring that the newly added beams are subjected to loads before concrete is poured. Construction requires only partial processing of the diaphragms and flanges, significantly reducing on-site work time and significantly minimizing disruption to normal bridge traffic. This method is particularly suitable for reinforcement in highways and other areas requiring rapid traffic flow.
[0048] It should be noted that, in this document, relational terms such as first and second are used solely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "comprise," "include," or any other variations thereof are intended to encompass non-exclusive inclusion, such that an article or device comprising a list of elements includes not only those elements but also other elements not explicitly listed. Without further limitation, an element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in the article or device comprising the element. Terms such as "connected" or "connected" are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. References to orientations or positional relationships, such as "upper," "lower," "left," and "right," are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate description and simplify the description of the present invention. They do not indicate or imply that the device or element referred to must have, be constructed, or operate in a specific orientation, and are therefore not to be construed as limiting the present invention.
[0049] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.
Claims
1. A prefabricated and assembled beam bridge reinforcement system, characterized in that: include: Multiple reinforcement devices, each of which is arranged between any two beams of the beam bridge to be reinforced and connected to the cross diaphragm of the beam bridge to be reinforced; the upper end of the reinforcement device abuts against the bottom of the main beam flange plate of the beam bridge to be reinforced and is connected by rivets, the rivets are prefabricated on the top of the reinforcement device, and the reinforcement device is filled with micro-expanding self-compacting concrete.
2. The prefabricated and assembled beam bridge reinforcement system according to claim 1, characterized in that: Each reinforcement device includes: a reinforcement beam body, the upper end of which abuts against the bottom of the main beam flange plate of the beam bridge to be reinforced and is connected by rivets; the rivets are prefabricated on the top of the reinforcement beam body, and the reinforcement beam body is filled with micro-expanding self-compacting concrete.
3. The prefabricated and assembled beam bridge reinforcement system according to claim 2, characterized in that: At least one of the reinforced beams comprises: a first steel box and a strip steel plate, wherein two first steel boxes are provided, and the two first steel boxes are vertically arranged at both ends of the strip steel plate, and the upper end of the first steel box located at the top abuts against the bottom of the main beam flange plate of the beam bridge to be reinforced and is connected by rivets; The rivets are prefabricated at the upper end of the first steel box located at the top, and both of the first steel boxes are filled with slightly expanding self-compacting concrete.
4. The prefabricated and assembled beam bridge reinforcement system according to claim 2, characterized in that: At least one of the reinforced beam bodies includes: a second steel box, which is arranged in a vertical direction, with an upper end abutting against the bottom of the main beam flange plate of the beam bridge to be reinforced and connected by rivets; The rivets are prefabricated at the upper end of the second steel box, and the second steel box is filled with slightly expanding self-compacting concrete.
5. The prefabricated and assembled beam bridge reinforcement system according to claim 2, characterized in that: At least one of the reinforced beams includes: a third steel box and a T-shaped steel plate, wherein the T-shaped steel plate includes an extended end and a flat end perpendicular to the extended end; the third steel box is connected to the extended end of the T-shaped steel plate, and the flat end of the T-shaped steel plate is located at the bottom or the top; When the plane end is at the bottom, the upper end of the third steel box abuts against the bottom of the main beam flange plate of the beam bridge to be reinforced and is connected by rivets; when the plane end is at the top, the third steel box is at the bottom, the plane end abuts against the bottom of the main beam flange plate of the beam bridge to be reinforced and is connected to the flange plate by rivets; The rivets are prefabricated on the third steel box or the upper end of the plane end, and the third steel box is filled with slightly expanding self-compacting concrete.
6. The prefabricated and assembled beam bridge reinforcement system according to claim 2, characterized in that: The surfaces of the connection locations between all the reinforced beams and the beam bridge to be reinforced are coated with epoxy mortar.
7. The prefabricated and assembled beam bridge reinforcement system according to claim 2, characterized in that: All of the reinforced beams are provided with a plurality of stiffening ribs arranged at intervals.
8. The prefabricated and assembled beam bridge reinforcement system according to claim 2, characterized in that: At least one of the reinforcement devices further includes: a support and a jack, wherein the support is arranged at the bottom of both ends of the reinforcement beam; the jack is arranged at the bottom of the support and the top of the reinforcement device for applying a lifting force.
9. The prefabricated and assembled beam bridge reinforcement system according to claim 8, characterized in that: The support includes a lower pad, a rubber support, a spherical hinge and an upper pad arranged in sequence from bottom to top, and the lower pad is provided with a support groove; the upper pad and the spherical hinge are movably connected through a hinge structure on a spherical surface.
10. A method for reinforcing a prefabricated assembled beam bridge, characterized in that: The prefabricated assembled beam bridge reinforcement system according to any one of claims 1 to 9 is used, and the reinforcement method comprises: Step 1: Prefabricate or weld on-site to form a local structure of the reinforced beam, and assemble on-site by welding to form multiple reinforced beams; Step 2: Partially chisel away the diaphragms at the reinforcement locations of the beam bridge to be reinforced and clean the connection surfaces to form multiple groups of reinforcement gaps, chisel away the concrete on the main beam flange plates at the reinforcement locations and drill rivet holes; Step 3: hoisting the plurality of reinforced beams to the plurality of reinforced gaps, and evenly coating the tops of the reinforced beams with epoxy mortar. After the plurality of reinforced beams are lifted to the designed heights by the jacks at the bottom of the supports, the support pads are poured and cured to the designed strength. Step 4: applying a lifting force to the bottom of the main beam flange plate of the beam bridge to be reinforced at the top of the plurality of reinforced beams through the jack; Step 5: pouring slightly expansive self-compacting concrete into all the reinforced beams, and connecting the rivet holes through prefabricated rivets on the reinforced beams to fix the beam bridge to be reinforced and all the reinforced beams; Step 6: Epoxy mortar is applied to all connection positions between the reinforced beam body and the beam bridge to be reinforced, and the removed positions of the main beam flange plate and the diaphragm are recast to complete the reinforcement of the prefabricated assembled beam bridge.