Reinforcing structure for additionally arranging anti-collision guardrail on hinged plate girder bridge and rapid construction method of reinforcing structure

Abstract

The invention provides a reinforcing structure for additionally arranging an anti-collision guardrail on a hinged plate girder bridge and a rapid construction method of the reinforcing structure, and relates to the technical field of municipal infrastructure, the reinforcing structure comprises a plurality of hollow plate girders, a beam top pressure-bearing steel plate and a beam bottom anchoring steel plate, hinge joints are formed in the adjacent hollow plate girders, and vertical mounting holes are formed in the length directions of the hinge joints; beam top pressure-bearing steel plates are arranged on the upper surfaces of the hollow plate beams, beam bottom anchoring steel plates are arranged on the lower surfaces of the hollow plate beams, high-strength split bolts penetrate through the beam top pressure-bearing steel plates, the vertical mounting holes and the beam bottom anchoring steel plates and are tightened and fixed through fixing assemblies, and anti-collision guardrails are additionally arranged on the beam top pressure-bearing steel plates. According to the method, the procedure of planting steel bars and drilling holes in the plate beam is thoroughly avoided, the risks of damaging the prestressed steel bars and weakening the effective section of the main beam are fundamentally eliminated, the structural integrity and bearing capacity of an original bridge are protected to the maximum extent, the core reinforcing component can be prefabricated in a factory, construction is fast and efficient, and comprehensive benefits are remarkable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of municipal infrastructure, and in particular to a reinforcing structure for adding crash barriers to a hinged slab girder bridge and a rapid construction method thereof. BACKGROUND

[0002] With the rapid development of urban traffic and the continuous improvement of safety standards in China, a large number of old bridges built under early standards have safety protection facilities that cannot meet the current crash requirements, and there is a major safety risk that vehicles will break through or jump out of the guardrails after losing control. When part of the Urban Bridge Design Specification (CJJ 11-2011) was revised in 2019, more detailed requirements for bridge cross-section design were added: for situations where the freeboard height is greater than 6m or the water depth is greater than 5m, the protection level is level one, and crash barriers must be installed on the outside of the carriageway. Therefore, for existing bridges, especially bridges in accident-prone sections or bridges that may cause significant secondary injuries, the addition or upgrading of crash barriers has become an urgent task to improve public transportation safety and reduce accident hazards.

[0003] However, such modifications on hinged slab girder bridges represented by hollow slab girders face serious technical challenges. The slab girder structure usually has a thin cross-section and limited beam height, with a top plate and a bottom plate thickness of usually between 8cm and 15cm. If the traditional anchoring technology is used to anchor the guardrail foundation, there are fundamental defects: first, the weak slab girder structure cannot provide the effective anchoring depth required by the specification, resulting in insufficient steel bar pulling capacity and making the guardrail foundation inherently weak; second, the drilling operation directly weakens the effective stress section of the existing main beam, forming a potential stress concentration point and seriously affecting the carrying capacity and structural durability of the existing main beam.

[0004] In summary, using the anchoring technology to build crash barrier foundations on hollow slab girder bridges is a measure with questionable reliability and high risk. The industry urgently needs a new technical solution that achieves the following core objectives: completely avoids drilling damage to the original slab girder structure; provides a clear and reliable load transfer path; effectively disperses the impact force of the guardrail to multiple beam bodies; and meets the requirements of rapid construction to minimize the impact on bridge traffic. SUMMARY

[0005] The purpose of the present application is to overcome and supplement the deficiencies in the prior art, to provide a reinforcing structure for adding crash barriers to a hinged slab girder bridge and a rapid construction method thereof, to solve the problems of insufficient anchoring depth, damage to the original structure, and long construction period caused by the thin slab girder structure of the traditional anchoring scheme, and to achieve rapid, safe, and reliable installation of crash barriers.

[0006] The technical solution adopted by the present application is: A reinforcing structure for adding crash barrier to hinged slab girder bridge, wherein: it comprises multiple hollow slab girders, a top bearing steel plate and a bottom anchoring steel plate, a hinge joint is arranged on adjacent hollow slab girders, vertical mounting holes are arranged along the length direction of the hinge joint, the upper surface of the multiple hollow slab girders is provided with the top bearing steel plate, the lower surface of the multiple hollow slab girders is provided with the bottom anchoring steel plate, high-strength tension bolts pass through the top bearing steel plate, the vertical mounting holes and the bottom anchoring steel plate and are fixed by a fixing assembly; A bridge deck concrete paving layer and a bridge deck asphalt paving layer are arranged on the multiple hollow slab girders on the top of the top bearing steel plate, and a crash barrier is arranged on the top bearing steel plate.

[0007] Preferably, the reinforcing structure for adding crash barrier to hinged slab girder bridge, wherein: multiple paving layer shear studs and anchoring shear studs are arranged on the upper surface of the top bearing steel plate at equal intervals in the longitudinal direction, the paving layer shear studs are arranged on the upper surface of the top bearing steel plate corresponding to the range of bridge deck paving, and the height of the paving layer shear studs is less than or equal to the thickness of the bridge deck concrete paving layer; the anchoring shear studs are arranged on the upper surface of the top bearing steel plate corresponding to the range of the crash barrier, and the height of the anchoring shear studs is greater than or equal to 25 cm; and the longitudinal direction of the upper surface of the top bearing steel plate is the extension direction of the crash barrier.

[0008] Preferably, the reinforcing structure for adding crash barrier to hinged slab girder bridge, wherein: grouting holes and overflow holes are further arranged on both sides of the top bearing steel plate, and plug welding holes are arranged on the top bearing steel plate corresponding to the positions of the high-strength tension bolts.

[0009] Preferably, the reinforcing structure for adding crash barrier to hinged slab girder bridge, wherein: steel plate stiffening ribs are arranged on the longitudinal and transverse directions of the bottom anchoring steel plate, and bolt mounting holes are arranged on the bottom anchoring steel plate corresponding to the positions of the high-strength tension bolts.

[0010] Preferably, the reinforcing structure for adding crash barrier to hinged slab girder bridge, wherein: the transverse width of the top bearing steel plate is greater than the web width of the adjacent hollow slab girders, the longitudinal length of the top bearing steel plate is segmented according to the length of the hollow slab girders, the segmented length is 1-1.5 m, deformation joints are arranged between adjacent top bearing steel plates, and the width of the deformation joints is 1-2 cm; and the length and width of the bottom anchoring steel plate are the same as the length and width of the top bearing steel plate.

[0011] Preferably, the reinforcing structure for adding crash barrier to hinged slab girder bridge, wherein: structural adhesive layers and rubber gaskets are sequentially arranged between the top bearing steel plate and the top surface of the hollow slab girders and between the bottom anchoring steel plate and the bottom surface of the hollow slab girders.

[0012] Preferably, the reinforcing structure for adding crash barrier to hinged slab girder bridge, wherein: the fixing assembly comprises a flat washer and double nuts.

[0013] Preferably, the reinforcing structure for adding crash barrier to hinged slab girder bridge, wherein: the bridge deck concrete pavement layer is provided with a steel mesh, and the steel mesh is bound with the pavement shear nails; the crash barrier is provided with a stress steel bar, and the stress steel bar is welded with the anchoring shear nails.

[0014] Preferably, the reinforcing structure for adding crash barrier to hinged slab girder bridge, wherein: the crash barrier position is not provided with the bridge deck concrete pavement layer and the bridge deck asphalt pavement layer.

[0015] The application also provides a rapid construction method of the reinforcing structure for adding crash barrier to hinged slab girder bridge, wherein: the method comprises the following steps: Step S1. Construction preparation: removing the bridge deck pavement layer at the position to be transformed, exposing the hollow slab girder and hinge joint, accurately marking the position along the hinge joint, drilling the vertical installation hole of the high-strength counter-pulling bolt, and cleaning the loose concrete in the vertical installation hole and the hinge joint; Step S2. Component prefabrication: prefabricating the girder top pressure steel plate and the girder bottom anchoring steel plate in the factory according to the design size, welding the pavement shear nails and the anchoring shear nails on the girder top pressure steel plate, opening the grouting hole, the overflow hole and the plug welding hole on the girder top pressure steel plate, and completing the plug welding welding of the high-strength counter-pulling anchor bolt and the girder top pressure steel plate; welding the longitudinal and transverse steel plate stiffeners on the girder bottom anchoring steel plate, and opening the bolt installation hole on the girder bottom anchoring steel plate; Step S3. On-site installation: brushing a layer of structural adhesive on the cleaned top surface and bottom surface of the hollow slab girder, and placing a rubber gasket, installing the assembled girder top pressure steel plate in place, making the high-strength counter-pulling bolt pass through the vertical installation hole between the hinge joints and the bolt installation hole of the girder bottom anchoring steel plate, and sequentially sleeving the flat washer and tightening the double nuts, so as to realize the counter-pulling anchoring of the entire reinforcing structure; Step S4. Hinge joint reinforcement: injecting high-strength non-shrinkage grouting material into the hinge joint through the grouting hole on the girder top pressure steel plate until uniform grout overflows from the overflow hole, so as to ensure that the hinge joint is completely filled and dense; Step S5. Crash barrier and bridge deck pavement construction: binding the bridge deck pavement layer steel mesh and the crash barrier steel bar, binding the bridge deck pavement layer steel mesh with the pavement shear nails, welding the crash barrier steel bar with the anchoring shear nails, and sequentially pouring the bridge deck concrete pavement layer and the concrete of the crash barrier on the upper surface of the hollow slab girder, and finally paving and compacting the bridge deck asphalt pavement layer after the concrete reaches the design strength.

[0016] The application has the following advantages: (1) The reinforcing structure for adding crash barrier to hinged slab girder bridge and the rapid construction method thereof of the present application has no damage to the original structure, high safety, completely avoids the process of planting a reinforcing bar and drilling a hole on the slab girder, fundamentally eliminates the risk of damaging the prestressed tendon and weakening the effective section of the main girder, and maximally protects the structural integrity and bearing capacity of the original bridge.

[0017] (2) The reinforcing structure for adding crash barrier to hinged slab girder bridge and the rapid construction method thereof of the present application have a clear force transmission path and strong structural integrity; the reinforcing structure is a fastening connecting piece fixed on the existing slab girder, the static friction force is generated by screw tightening to bear the horizontal impact force borne by the crash barrier, the compressive force generated by the screw is transmitted to the adjacent multiple slab girders through the steel plate, so that the load dispersion is realized.

[0018] (3) The reinforcing structure for adding crash barrier to hinged slab girder bridge and the rapid construction method thereof of the present application are fast and efficient, have significant comprehensive benefits, the core reinforcing components can be prefabricated in a factory, and the on-site assembly is mainly used, so that the road occupation construction time is greatly shortened; the construction process is clear, the quality is easy to control, the traffic influence and comprehensive cost are significantly reduced while the engineering reliability is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a cross-sectional schematic view of the reinforcing structure for adding crash barrier to hinged slab girder bridge of the present application.

[0020] Fig. 2 It is a structural schematic view of the girder top bearing steel plate of the present application.

[0021] Fig. 3 It is a structural schematic view of the girder bottom anchoring steel plate of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] 1-hinge joint, 2-hollow slab girder, 3-crash barrier, 4-bridge concrete pavement layer, 5-bridge asphalt pavement layer, 6-reinforcing mesh, 7-guardrail reinforcing bar, 8-girder top bearing steel plate, 9-girder bottom anchoring steel plate, 10-rubber gasket, 11-structural adhesive layer, 12-soldering hole, 13-double nut, 14-flat washer, 15-high-strength tension bolt, 16-vertical mounting hole, 17-high-strength non-shrinkage grouting material, 18-pavement shear pin, 19-anchoring shear pin, 20-steel plate stiffening rib, 21-grouting hole, 22-overflow hole, 23-bolt mounting hole. DETAILED DESCRIPTION

[0023] The present application will be further described below in combination with specific drawings and examples.

[0024] Example 1 As Figs. 1-3A reinforcing structure for adding crash barrier to hinged slab beam bridge, wherein: it comprises multiple hollow slab beams 2, beam top bearing steel plate 8 and beam bottom anchoring steel plate 9, hinge joint 1 is arranged on adjacent hollow slab beams 2, vertical mounting hole 16 is arranged along the length direction of hinge joint 1, the upper surface of multiple hollow slab beams 2 is provided with beam top bearing steel plate 8, the lower surface of multiple hollow slab beams 2 is provided with beam bottom anchoring steel plate 9, high-strength tension bolt 15 passes through beam top bearing steel plate 8, vertical mounting hole 16 and beam bottom anchoring steel plate 9 and is fixed by fixing assembly; Bridge deck concrete paving layer 4 and bridge deck asphalt paving layer 5 are arranged on multiple hollow slab beams 2 on the top of beam top bearing steel plate 8, crash barrier 3 is arranged on beam top bearing steel plate 8, and bridge deck concrete paving layer 4 and bridge deck asphalt paving layer 5 are not arranged at the position of crash barrier 3.

[0025] Multiple paving layer shear nails 18 and anchoring shear nails 19 are arranged on the upper surface of beam top bearing steel plate 8 along the longitudinal direction at equal intervals, paving layer shear nails 18 are arranged in the range corresponding to bridge deck paving 4 on the upper surface of beam top bearing steel plate 8, the height of paving layer shear nails 18 is less than or equal to the thickness of bridge deck concrete paving layer 4, anchoring shear nails 19 are arranged in the range corresponding to crash barrier 3 on the upper surface of beam top bearing steel plate 8, the height of anchoring shear nails 19 is greater than or equal to 25 cm, and the longitudinal direction of the upper surface of beam top bearing steel plate 8 is the extension direction of crash barrier 3.

[0026] Grouting hole 21 and overflow hole 22 are further arranged on both sides of beam top bearing steel plate 8, high-strength non-shrinkage grouting material 17 is injected into hinge joint 1 through grouting hole 21 during construction, and hinge joint between hollow slab beams 2 is filled and compacted to form a reinforced force transmission medium, plug welding hole 12 is arranged on beam top bearing steel plate 8 corresponding to the position of high-strength tension bolt 15, and high-strength tension bolt 15 is fixed and welded with beam top bearing steel plate 8 through hole plug welding.

[0027] Steel plate stiffening rib 20 is arranged on the longitudinal and transverse directions of beam bottom anchoring steel plate 9 to enhance local stiffness, bolt mounting hole 23 is arranged on beam bottom anchoring steel plate 9 corresponding to the position of high-strength tension bolt 15, the transverse width of beam top bearing steel plate 8 is greater than the web width of adjacent hollow slab beams 2 to ensure that the fastening force and friction force are effectively dispersed to adjacent multiple hollow slab beams 2, the longitudinal length of beam top bearing steel plate 8 is segmented according to the length of hollow slab beam 2, the segmented length is 1-1.5 m, deformation joint is arranged between adjacent beam top bearing steel plates 8, and the width of deformation joint is 1-2 cm, and the length and width of beam bottom anchoring steel plate 9 are the same as the length and width of beam top bearing steel plate 8.

[0028] The structural adhesive layer 11 is leveled on the concrete surface of the hollow slab beam 2, improving the connection reliability, and the rubber gasket 10 ensures the contact compactness and uniformly transmits the stress and increases the friction coefficient.

[0029] The fixing assembly includes a flat washer 14 and a double nut 13, and the double nut 13 has good loosening performance, ensuring that it is not loosened under frequent vehicle vibration loads.

[0030] The bridge deck concrete pavement layer 4 is provided with a steel bar mesh 6, and the steel bar mesh 6 is bound with the pavement shear nails 18; the crash barrier 3 is provided with a stress steel bar 7, and the stress steel bar 7 is welded with the anchoring shear nails 19.

[0031] The bridge deck concrete pavement steel bar mesh 6 is bound with the pavement shear nails 18, and after the bridge deck concrete pavement layer 4 and the crash barrier 3 are poured with concrete, they form an integral whole, improve the anti-impact capacity of the crash barrier 3, and make the impact force applied to the shear stress and tensile stress of the beam top bearing steel plate 8 be uniformly transmitted; the length of the anchoring shear nail 19 should meet the anchoring length requirement, and the number and cross-sectional size are determined according to the design impact force calculation, and are reliably connected with the crash barrier steel bar 7 of the crash barrier 3.

[0032] Embodiment 2 As Figs. 1-3 A construction method of a reinforcing structure for adding a crash barrier to a hinged slab beam bridge, comprising the following steps: Step S1. Construction preparation: shovel off the bridge pavement layer at the position to be transformed, expose the hollow slab beam 2 and the hinge joint 1, accurately mark the position along the hinge joint 1, drill the vertical installation hole 16 of the high-strength tension bolt 15, and clean the loose concrete in the vertical installation hole 16 and the hinge joint 1; Step S2. Component prefabrication: according to the design size, prefabricate the beam top bearing steel plate 8 and the beam bottom anchoring steel plate 9 in the factory, weld the pavement shear nail 18 and the anchoring shear nail 19 on the beam top bearing steel plate 8, open the grouting hole 21, the overflow hole 22 and the plug welding hole 12 on the beam top bearing steel plate 8, complete the plug welding of the high-strength tension bolt 15 and the beam top bearing steel plate 8, weld the longitudinal and transverse steel plate stiffeners 20 on the beam bottom anchoring steel plate 9, and open the bolt installation hole 23 on the beam bottom anchoring steel plate 9; Step S3. On-site installation: brush the structural adhesive layer 11 on the top and bottom surfaces of the cleaned hollow slab beam 2, and place the rubber gasket 10, install the assembled beam top bearing steel plate in place, make the high-strength tension bolt 15 pass through the vertical installation hole 16 between the hinge joints and the bolt installation hole of the beam bottom anchoring steel plate 9, and sequentially put in the flat washer 14 and tighten the double nut 13, to realize the tension anchoring of the whole reinforcing structure. Step S4. Hinge joint reinforcement: high-strength non-shrinkage grouting material 17 is injected into the hinge joint 1 through the grouting hole 21 on the beam top bearing steel plate 8 until uniform grout overflows from the overflow hole 22, ensuring that the hinge joint 1 is completely filled and dense; Step S5. Crash barrier and bridge deck pavement construction: tie the bridge deck pavement layer reinforcement mesh 6 and the crash barrier reinforcement 7, tie the bridge deck pavement layer reinforcement mesh 6 with the pavement layer shear stud 18, and weld the crash barrier reinforcement 7 with the anchoring shear stud 19. Pour the concrete of the bridge deck concrete pavement layer 4 and the crash barrier 3 on the top surface of the hollow slab beam 2 in turn. After the concrete reaches the design strength, finally, the bridge deck asphalt pavement layer 5 is paved and compacted.

[0033] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A reinforcing structure for adding a crash barrier to a hinged slab girder bridge, characterized by: The application relates to a hollow slab beam (2), a beam top bearing steel plate (8) and a beam bottom anchoring steel plate (9), a hinge joint (1) is arranged on the adjacent hollow slab beam (2), vertical mounting holes (16) are arranged along the length direction of the hinge joint (1), the upper surface of the hollow slab beam (2) is provided with the beam top bearing steel plate (8), the lower surface of the hollow slab beam (2) is provided with the beam bottom anchoring steel plate (9), high-strength tension bolts (15) pass through the beam top bearing steel plate (8), the vertical mounting holes (16) and the beam bottom anchoring steel plate (9) and are fixed by a fixing assembly; Bridge deck concrete paving layers (4) and bridge deck asphalt paving layers (5) are arranged on the top of the beam top bearing steel plate (8) and the multiple hollow slab beams (2).

2. The reinforcing structure for adding crash barrier to a hinged plate girder bridge according to claim 1, characterized in that: Multiple paving layer shear nails (18) and anchoring shear nails (19) are arranged on the upper surface of the beam top bearing steel plate (8) along the longitudinal direction at equal intervals, the paving layer shear nails (18) are arranged in the range corresponding to the bridge deck paving (4) on the upper surface of the beam top bearing steel plate (8), the height of the paving layer shear nails (18) is less than or equal to the thickness of the bridge deck concrete paving layer (4); the anchoring shear nails (19) are arranged in the range corresponding to the crash barrier (3) on the upper surface of the beam top bearing steel plate (8), the height of the anchoring shear nails (19) is greater than or equal to 25 cm, and the longitudinal direction of the upper surface of the beam top bearing steel plate (8) is the extension direction of the crash barrier (3).

3. The reinforcing structure for adding crash barrier to a hinged plate girder bridge according to claim 2, characterized in that: Grouting holes (21) and overflow holes (22) are further arranged on the two sides of the beam top bearing steel plate (8), and plug welding holes (12) are arranged on the beam top bearing steel plate (8) corresponding to the high-strength tension bolts (15).

4. The reinforcing structure for adding crash barrier to a hinged slab girder bridge according to claim 2, characterized in that: Steel plate stiffening ribs (20) are arranged on the longitudinal and transverse directions of the beam bottom anchoring steel plate (9), and bolt mounting holes (23) are arranged on the beam bottom anchoring steel plate (9) corresponding to the high-strength tension bolts (15).

5. The reinforcing structure for adding crash barrier to a hinged slab girder bridge according to claim 1, characterized in that: The transverse width of the beam top bearing steel plate (8) is greater than the web width of the adjacent hollow slab beam (2), the longitudinal length of the beam top bearing steel plate (8) is segmented according to the length of the hollow slab beam (2), the segmented length is 1-1.5 m, deformation joints are arranged between the adjacent beam top bearing steel plates (8), and the width of the deformation joints is 1-2 cm; the length and width of the beam bottom anchoring steel plate (9) are the same as those of the beam top bearing steel plate (8).

6. The reinforcing structure for adding crash barrier to a hinged plate girder bridge according to claim 1, characterized in that: Structural adhesive layers (11) and rubber gaskets (10) are sequentially arranged between the beam top bearing steel plate (8) and the top surface of the hollow slab beam (2) and between the beam bottom anchoring steel plate (9) and the bottom surface of the hollow slab beam (2).

7. The crashworthy structure with added crash barrier according to claim 1, characterized in that: The fixing assembly comprises a flat washer (14) and double nuts (13).

8. The crashworthy structure with added crash barrier according to claim 2, characterized in that: Steel mesh (6) is arranged in the bridge deck concrete paving layer (4) and is bound with the paving layer shear nails (18); stress steel bars (7) are arranged in the crash barrier (3) and are welded with the anchoring shear nails (19).

9. The crashworthy structure with added crash barrier according to claim 2, characterized in that: The crash barrier (3) is not provided with the bridge deck concrete paving layer (4) and the bridge deck asphalt paving layer (5).

10. The rapid construction method for reinforcing structure of crash barrier added to a hinged plate girder bridge according to any one of claims 1 to 9, characterized in that: The application further relates to a construction method of the hollow slab beam (2), the beam top bearing steel plate (8) and the beam bottom anchoring steel plate (9). Step S1. Construction preparation: remove the bridge deck pavement at the position of the modification, expose the hollow slab beam (2) and hinge joint (1), accurately mark the position along the hinge joint (1), drill vertical installation holes (16) for high-strength counter-pulling bolts (15), and clean the loose concrete in the vertical installation holes (16) and the hinge joint (1); Step S2. Component prefabrication: prefabricate the beam top bearing steel plate (8) and the beam bottom anchoring steel plate (9) in the factory according to the design size, weld the pavement shear nails (18) and anchoring shear nails (19) on the beam top bearing steel plate (8), open grouting holes (21), overflow holes (22), and plug welding holes (12) on the beam top bearing steel plate (8), and complete the perforation plug welding and welding of the high-strength counter-pulling anchor bolts (15) and the beam top bearing steel plate (8); weld longitudinal and transverse steel plate stiffeners (20) on the beam bottom anchoring steel plate (9), and open bolt installation holes (23) on the beam bottom anchoring steel plate (9); Step S3. On-site installation: brush a layer of structural adhesive (11) on the top and bottom surfaces of the cleaned hollow slab beam (2), and place rubber gaskets (10), install the assembled beam top bearing steel plate (8) in place, make the high-strength counter-pulling bolts (15) pass through the vertical installation holes (16) between the hinge joints and the bolt installation holes of the beam bottom anchoring steel plate (9), and sequentially fit into flat washers (14) and tighten double nuts (13), to realize the counter-pulling anchoring of the entire reinforcing structure; Step S4. Hinge joint reinforcement: inject high-strength non-shrinkage grouting material (17) into the hinge joint (1) through the grouting holes (21) on the beam top bearing steel plate (8) under pressure until uniform grout overflows from the overflow holes (22), to ensure that the hinge joint (1) is completely filled and dense; Step S5. Construction of crash barrier and bridge deck pavement: bind the bridge deck pavement reinforcement mesh (6) and the crash barrier reinforcement (7), bind the bridge deck pavement reinforcement mesh (6) with the pavement shear nails (18), weld the crash barrier reinforcement (7) with the anchoring shear nails (19), and sequentially pour the concrete of the bridge deck concrete pavement (4) and the crash barrier (3) on the upper surface of the hollow slab beam (2), after the concrete reaches the design strength, finally pave and compact the bridge asphalt pavement (5).

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