Anti-overturning reinforcing steel structure for reconstruction of single-column-pier curved bridge

Abstract

The utility model relates to an anti-overturning reinforcing steel structure for reconstruction of a single-column-pier curved bridge, and solves the problems that the single-column-pier bridge cannot meet the increasing traffic flow demand and has the overturning risk. The structure comprises a bridge plate, a single-column pier is arranged below the bridge plate, a steel cover beam clamped on the side wall of the single-column pier is additionally arranged on the top of the single-column pier, the steel cover beam extends on the two sides of the single-column pier in the transverse direction of the bridge plate, and newly-added supports are arranged between the top faces of the two ends of the steel cover beam and the bottom face of the bridge plate respectively. Support cushion stones are poured on the top faces of the two ends of the steel cover beam, the newly-added support sequentially comprises a support lower steel plate, a rubber cushion block and a support upper steel plate from bottom to top, the support lower steel plate and the support cushion stones are connected and fixed through riveting bolts, and a beam bottom steel plate is arranged on the bottom face of the bridge plate and aligned with the support upper steel plate. The beam bottom steel plate is bonded and fixed to the bottom face of the bridge plate through sticky steel glue, and the beam bottom steel plate and the support upper steel plate are aligned and fully welded in a circumferential mode. According to the single-column pier bridge, the mode that the steel cover beam is additionally arranged on the pier top is adopted, multi-point type supporting is formed on the beam plate of the bridge, and anti-overturning reinforcing is carried out.

Description

Technical Field

[0001] The utility model belongs to the field of bridge facilities, relates to a bridge reinforcement structure, and particularly relates to an anti-overturning reinforcement steel structure used for the reconstruction of a single-column pier curved bridge. Background Art

[0002] Single-column piers are the substructure of bridges and are usually used for overpasses, flyovers and ramp bridges of highway interchanges on urban roads. Due to the congested urban traffic and the limited land acquisition for urban and surrounding construction land, it is often necessary to locate bridge piers within a limited range. In order to meet the above requirements, single-column piers are used instead of the larger traditional double-column piers or multi-column piers.

[0003] Compared with two-column piers, single-column pier bridges have the advantages of occupying less land, improving the layout of the lower structure, increasing the field of vision, beautiful bridge shape, and the ability to cross with a smaller span, which is more economical. However, they also have problems such as weak torsional resistance at the pier top and insufficient lateral anti-overturning capacity. Under certain extreme vehicle operating conditions, such as when multiple heavily loaded large trucks are driving on the same lane on the same side of the bridge at the same time, the bridge will be in danger of overturning.

[0004] At present, most of the single-column pier bridges were built a long time ago. With the update of technology and specifications in recent years, the design load of bridges has been continuously improved. Some existing bridges often cannot meet the requirements of current specifications. In order to meet the increasing traffic flow demand and solve the potential safety hazards of bridges, it is necessary to carry out anti-overturning reinforcement on the existing single-column pier bridges.

[0005] Because the terrain, geology and construction environment of the bridge are different, the reinforcement methods of single-column pier bridges are also different. Generally, there are methods such as strengthening the pier top beam, adding columns, increasing the cross section, and adding columns and tie rods. Among them, increasing the cross section and strengthening the pier top beam is more cost-effective, not only shortening the construction time, but also being cost-effective and having a better reinforcement effect. Utility Model Content

[0006] The purpose of the utility model is to solve the problem that single-column pier bridges cannot meet the increasing traffic flow demand and there is a risk of overturning. An anti-overturning reinforcement steel structure for the reconstruction of single-column pier curved bridges is provided. A steel cap beam is added to the pier top of the single-column pier bridge to form multi-point support for the bridge beam and to carry out anti-overturning reinforcement.

[0007] The technical solution adopted by the utility model to solve its technical problems is: an anti-overturning reinforcement steel structure for the reconstruction of a single-column pier curved bridge, comprising a bridge plate, a single-column pier is arranged below the bridge plate, an original support seat is arranged between the top surface of the single-column pier and the bottom surface of the bridge plate, a steel cap beam is additionally arranged on the top of the single-column pier and clamped to the side wall of the single-column pier, the steel cap beam extends along the transverse direction of the bridge plate on both sides of the single-column pier, and newly added supports are respectively arranged between the top surface of both ends of the steel cap beam and the bottom surface of the bridge plate; support pad stones are cast on the top surfaces of both ends of the steel cap beam, and the newly added supports include, from bottom to top, a support lower steel plate, a rubber pad, and a support upper steel plate, the support lower steel plate and the support pad stone are connected and fixed by riveting bolts, a beam bottom steel plate is arranged on the bottom surface of the bridge plate to align with the support upper steel plate, the beam bottom steel plate is bonded and fixed to the bottom surface of the bridge plate by steel glue, and the beam bottom steel plate is aligned with the support upper steel plate and is fully welded around the circumference.

[0008] This device adopts a structure of adding a box-type transverse steel capping beam on the top of the single-column pier, and uses the newly added supports at both ends of the steel capping beam to form auxiliary supports on both sides of the bridge slab to reinforce the bridge against overturning. During construction, first cast the support pad stone on the top surface of the steel capping beam, install the newly added supports, and then fix the steel capping beam and the top of the single-column pier, then lift the bridge slab, adhere the bottom steel plate of the beam to the bottom surface of the bridge slab, and then weld the beam steel plate to the newly added supports.

[0009] Preferably, the steel cap beam comprises two semi-cylindrical arc-shaped steel plates embracing the top side wall of the single-column pier. The two arc-shaped steel plates are aligned with the side wall of the single-column pier to open a number of anchor holes. An anchor bolt is fixed in the anchor hole. The arc-shaped steel plate is tightened by tightening nuts and anchor bolts. Connecting plates are arranged at the joints on both sides of the two arc-shaped steel plates, and the connecting plates are locked by bolts. The steel cap beam is manufactured in parts and completed by on-site welding and assembly. The installation and construction of the arc-shaped steel plate and the single-column pier are as follows: first, the side wall corresponding to the installation of the single-column pier and the steel cap beam is roughened, and then anchor holes are opened, anchor glue is poured into the anchor holes and anchor bolts are implanted, and then steel adhesive is applied to the rough surface of the single-column pier, and the arc-shaped steel plate is attached to the surface of the single-column pier, and the anchor holes are aligned, and then nuts are used to lock the anchor bolts.

[0010] Preferably, the steel cap beam has a transverse steel plate extending laterally outward welded to the outer wall of the arc-shaped steel plate, and a longitudinal steel plate welded perpendicularly to the transverse steel plate. The transverse steel plate and the longitudinal steel plate form a grid structure, and the longitudinal steel plate is disconnected from the intersection of the transverse steel plate and the longitudinal steel plate.

[0011] Preferably, the top surface of the steel cap beam is provided with a horizontal top plate, and the bottom surface of the steel cap beam is provided with a bottom plate inclined upward from the inside to the outside. The steel cap beam has a structure that is thick in the middle and thin at the ends.

[0012] Preferably, the side wall between the top of the single-column pier and the steel cap beam is roughened, and steel adhesive is applied between the side wall of the single-column pier and the steel cap beam.

[0013] Preferably, more than four rivet bolts are evenly arranged around the circumference between the lower steel plate of the support and the support pad stone.

[0014] Preferably, a dust cover is provided around the circumference between the lower steel plate of the support and the upper steel plate of the support.

[0015] Preferably, the support pad stone is evenly arranged with U-shaped reinforcements in a crisscross grid pattern, the bottom edge of the U-shaped reinforcement is welded and fixed to the top surface of the steel cap beam, and the vertical edges of the U-shaped reinforcement are tied with stirrups.

[0016] Preferably, the bridge deck is a bridge deck of a bridge ramp, the bridge deck has an inclination and an arc, and the steel cap beam is arranged perpendicular to the central axis of the bridge deck.

[0017] The utility model single-column pier bridge adopts the method of adding a steel cap beam on the pier top to form a multi-point support for the beam plate of the bridge and perform anti-overturning reinforcement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the location of the original bridge slab and single-column pier.

[0020] Figure 2 This is a schematic diagram of the original single-column pier support structure.

[0021] Figure 3 It is a schematic diagram of the structure of the single-column pier after anti-overturning reinforcement of the utility model.

[0022] Figure 4 It is a schematic diagram of the side structure of the steel cap beam of the utility model.

[0023] Figure 5 It is a schematic diagram of the top view structure of the steel cap beam of the utility model.

[0024] Figure 6 It is an enlarged structural schematic diagram of the newly added support of the utility model.

[0025] Figure 7 It is a reinforcement diagram of the support pad stone of the utility model.

[0026] Figure 8 It is a structural schematic diagram of a grid-like U-shaped reinforcement in a support pad stone of the utility model.

[0027] In the figure: 1. Bridge plate, 2. Single column pier, 3. Original support seat, 4. Steel cap beam, 5. New support, 6. Rebar embedding hole, 7. Arc steel plate, 8. Connecting plate, 9. Bolts, 10. Top plate, 11. Bottom plate, 12. Longitudinal steel plate, 13. Transverse steel plate, 14. Support pad stone, 15. Anchor bolts, 16. New support, 17. Steel plate under support, 18. Rubber pad, 19. Steel plate on support, 20. Dust cover, 21. Beam bottom steel plate, 22. Steel glue, 23. U-shaped reinforcement, 24. Stirrups. DETAILED DESCRIPTION

[0028] The present invention is further described below through specific embodiments in conjunction with the accompanying drawings.

[0029] Embodiment: An anti-overturning reinforcement steel structure for the reconstruction of a single-column pier curved bridge, such as Figure 1 As shown in Figure 1, the single-column pier reinforcement structure is applied to the bridge turning ramp. The original single-column pier support structure is as follows Figure 2 As shown, a single original support seat 3 is arranged on the top of the single column pier 2 to support the center line of the bridge plate 1. The bridge plate is a bridge plate of a bridge ramp, the bridge plate has an inclination and an arc, and the steel cap beam is arranged perpendicularly to the center axis of the bridge plate.

[0030] This structure uses steel cap beams to reinforce the single-column pier against overturning. Figure 3 As shown. A steel cap beam 4 is additionally provided on the top of the single-column pier 2 and is clamped to the side wall of the single-column pier. The steel cap beam 4 extends transversely on both sides of the single-column pier along the bridge slab, and additional supports 5 are respectively provided between the top surfaces of both ends of the steel cap beam and the bottom surfaces of the bridge slab. The steel cap beam 4 includes two semi-cylindrical arcuate steel plates 7 that clamp the side wall of the top of the single-column pier. The two arcuate steel plates are aligned with the side wall of the single-column pier and have a number of anchor bolt holes 6. An anchor bolt is fixed in the anchor bolt holes, and the arcuate steel plates are tightened with compression nuts and anchor bolts; connecting plates 8 are relatively provided at the joints on both sides of the two arcuate steel plates, and the connecting plates are locked with bolts 9. The side wall of the single-column pier top and the steel cap beam is roughened, and adhesive steel glue is applied between the side wall of the single-column pier and the steel cap beam. As shown Figure 4 , 5 As shown, the steel cap beam 4 is welded with a transverse steel plate 13 extending outward transversely on the outer wall of the arc-shaped steel plate 7, and a longitudinal steel plate 12 is welded perpendicularly to the transverse steel plate. The transverse steel plate and the longitudinal steel plate form a grid structure, and the longitudinal steel plate 12 is disconnected and welded at the intersection of the longitudinal steel plate and the transverse steel plate. The top surface of the steel cap beam 4 is provided with a horizontal top plate 10, and the bottom surface of the steel cap beam is provided with a bottom plate 11 inclined upward from the inside to the outside. The steel cap beam 4 is a box-type structure with a thick inner end and thin ends.

[0031] like Figure 6As shown, the top surfaces of both ends of the steel cap beam 4 are cast with support pads 14, and the newly added support 16 includes a support lower steel plate 17, a rubber pad 18, and a support upper steel plate 19 from bottom to top, and a dust cover 20 is arranged around the support lower steel plate and the support upper steel plate. The support lower steel plate 17 is connected and fixed to the support pad 14 by riveting bolts 15, and more than four riveting bolts are evenly arranged around the support lower steel plate and the support pad. The bottom surface of the bridge slab 1 is aligned with the support upper steel plate 19 and a beam bottom steel plate 21 is arranged. The beam bottom steel plate 21 is bonded and fixed to the bottom surface of the bridge slab by using steel glue 22, and the beam bottom steel plate 21 is aligned with the support upper steel plate 19 and fully welded around the circumference.

[0032] like Figure 7 , 8 As shown, the support pad stone 14 is evenly arranged with U-shaped reinforcement 23 in a crisscross grid shape, the bottom edge of the U-shaped reinforcement is welded and fixed to the top surface of the steel cap beam, and the vertical edge of the U-shaped reinforcement is tied with stirrups 24.

Claims

1. An anti-overturning reinforcement steel structure for the reconstruction of a single-column pier curved bridge, comprising a bridge slab, a single-column pier is arranged below the bridge slab, and an original support seat is arranged between the top surface of the single-column pier and the bottom surface of the bridge slab, characterized in that: A steel cap beam is added to the top of the single-column pier and is clamped on the side wall of the single-column pier. The steel cap beam extends transversely on both sides of the single-column pier along the bridge slab. New bearings are respectively arranged between the top surfaces at both ends of the steel cap beam and the bottom surfaces of the bridge slab. Bearing pad stones are cast on the top surfaces at both ends of the steel cap beam. The new bearings include a bearing lower steel plate, a rubber pad, and a bearing upper steel plate from bottom to top. The bearing lower steel plate and the bearing pad stone are connected and fixed with riveted bolts. A beam bottom steel plate is arranged to align the bottom surface of the bridge slab with the bearing upper steel plate. The beam bottom steel plate is bonded and fixed to the bottom surface of the bridge slab with steel glue. The beam bottom steel plate is aligned with the bearing upper steel plate and is fully welded around the circumference.

2. The anti-overturning reinforcement steel structure for reconstruction of a single-column pier curved bridge according to claim 1 is characterized by: The steel cap beam includes two semi-cylindrical arc-shaped steel plates that embrace the top side walls of the single-column pier. The two arc-shaped steel plates are aligned with the side walls of the single-column pier and have a number of anchor bolts. An anchor bolt is fixed in the anchor bolt holes. The arc-shaped steel plates are tightened with compression nuts and anchor bolts. Connecting plates are relatively arranged at the butt joints on both sides of the two arc-shaped steel plates, and the connecting plates are locked with bolts.

3. The anti-overturning reinforcement steel structure for reconstruction of a single-column pier curved bridge according to claim 2 is characterized by: The steel cap beam has a transverse steel plate extending laterally outward welded to the outer wall of the arc-shaped steel plate, and a longitudinal steel plate welded perpendicularly to the transverse steel plate. The transverse steel plate and the longitudinal steel plate form a grid structure, and the longitudinal steel plate is disconnected from the intersection of the transverse steel plate and the longitudinal steel plate.

4. The anti-overturning reinforcement steel structure for reconstruction of a single-column pier curved bridge according to claim 1, 2 or 3, characterized in that: The top surface of the steel cap beam is provided with a horizontal top plate, and the bottom surface of the steel cap beam is provided with a bottom plate inclined upward from the inside to the outside.

5. The anti-overturning reinforcement steel structure for reconstruction of a single-column pier curved bridge according to claim 1, 2 or 3, characterized in that: The side wall of the single-column pier top and the steel cap beam is roughened, and steel adhesive is applied between the side wall of the single-column pier and the steel cap beam.

6. The anti-overturning reinforcement steel structure for reconstruction of a single-column pier curved bridge according to claim 1, 2 or 3, characterized in that: There are more than four rivet bolts evenly arranged around the circumference between the lower steel plate of the support and the support pad stone.

7. The anti-overturning reinforcement steel structure for reconstruction of a single-column pier curved bridge according to claim 1, 2 or 3, characterized in that: A dust cover is arranged around the circumference between the support lower steel plate and the support upper steel plate.

8. The anti-overturning reinforcement steel structure for reconstruction of a single-column pier curved bridge according to claim 1, 2 or 3, characterized in that: The support pad stone is evenly arranged with U-shaped reinforcements that are crisscrossed to form a grid. The bottom edge of the U-shaped reinforcement is welded and fixed to the top surface of the steel cap beam, and the vertical edge of the U-shaped reinforcement is tied with stirrups.

9. The anti-overturning reinforcement steel structure for reconstruction of a single-column pier curved bridge according to claim 1, 2 or 3, characterized in that: The bridge plate is a bridge plate of a bridge ramp, the bridge plate has an inclination and an arc, and the steel cap beam is arranged perpendicular to the central axis of the bridge plate.

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