Bridge widening corrugated plate splicing structure

Abstract

The utility model relates to the technical field of bridge expansion and reconstruction, and discloses a bridge widening corrugated plate splicing structure which comprises a corrugated plate, the corrugated plate connects an old bridge with a steel-concrete composite beam through a connecting piece, the corrugated plate is located between the old bridge and the steel-concrete composite beam, the upper portion of the corrugated plate is filled with asphalt concrete, and the lower portion of the corrugated plate is filled with concrete. The top face of the asphalt concrete is flush with the top face of the old bridge and the top face of the steel-concrete composite beam. The corrugated plate is spliced between the old bridge and the steel-concrete composite beam, the upper portion of the corrugated plate is filled with the asphalt concrete so that the plane of the corrugated plate can be flush with the old bridge and the steel-concrete composite beam, the asphalt concrete and the corrugated plate bear additional internal force generated by the settlement difference of the new bridge and the old bridge together, and the crack resistance of the connecting structure at the splicing position can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge expansion and reconstruction, and more specifically, to a bridge widening corrugated plate splicing structure. Background Art

[0002] With the acceleration of urbanization and the growth of transportation demands, the low standards and insufficient load-bearing capacity of earlier bridges are gradually hindering smooth traffic flow and making it difficult to meet current traffic flow demands. Widening and renovating existing bridges can improve traffic capacity and extend their service life. It also saves resources, reduces environmental pollution, and reaps positive socioeconomic benefits compared to building new roads and bridges along alternate routes.

[0003] Widening an existing bridge during bridge renovation and expansion projects presents numerous technical challenges. The widening project is impacted by existing traffic on the old bridge, requiring guaranteed access during construction. The foundation settlement and shrinkage creep of the new bridge are out of sync with those of the old bridge, leading to differential deformation at the connection between the new and old main beams. This creates additional internal forces at the splice, causing cracks in the bridge deck and damage to the spliced ​​structure, ultimately impacting driving comfort and safety. The stress and deformation at the splice are crucial factors influencing the overall performance of the widened bridge.

[0004] In order to improve the impact of the above factors on bridge widening, it is urgent to propose a new type of bridge transverse widening splicing structure that is simple to construct, easy to maintain, and can withstand the additional internal forces and deformation differences between the new and old box girder bridges. Utility Model Content

[0005] The purpose of the utility model is to provide a bridge widening corrugated plate splicing structure to solve the problems existing in the prior art. The corrugated plates are spliced ​​between the old bridge and the steel-concrete composite beam, and asphalt concrete is filled above the corrugated plates to make their plane flush with the old bridge and the steel-concrete composite beam. The asphalt concrete and the corrugated plates jointly bear the additional internal force generated by the settlement difference between the old and new bridges, which can effectively improve the crack resistance of the connection structure at the splicing point.

[0006] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention provides a bridge widening corrugated plate splicing structure, comprising: a corrugated plate, wherein the corrugated plate connects the old bridge and the steel-concrete composite beam through a connecting piece, the corrugated plate is located between the old bridge and the steel-concrete composite beam, and asphalt concrete is filled above the corrugated plate, and the top surface of the asphalt concrete is flush with the top surface of the old bridge and the steel-concrete composite beam.

[0007] According to a bridge widening corrugated plate splicing structure provided by the utility model, the connecting parts are shear nails, the shear nails are welded on both sides of the corrugated plate, and the corrugated plate is respectively fixed to the old bridge and the steel-concrete composite beam through the shear nails.

[0008] According to a bridge widening corrugated plate splicing structure provided by the utility model, steel bars are provided at the splicing position of the old bridge, and the shear nails are fixedly connected to the steel bars.

[0009] According to a bridge widening corrugated plate splicing structure provided by the utility model, first concrete is filled between the old bridge and the corrugated plate, and the shear nails are located in the first concrete.

[0010] According to a bridge widening corrugated plate splicing structure provided by the utility model, second concrete is filled between the steel-concrete composite beam and the corrugated plate, and the shear studs of the corrugated plate close to the steel-concrete composite beam side are located in the second concrete.

[0011] According to the bridge widening corrugated plate splicing structure provided by the utility model, the shear nails are tied and welded to the steel bars.

[0012] The utility model discloses the following technical effects:

[0013] This device uses corrugated plates to splice the old bridge and the steel-concrete composite beam. Connectors are provided on both sides of the corrugated plates to form a stable connection between the corrugated plates, the steel-concrete composite beam and the old bridge. Asphalt concrete is poured on the corrugated plates until it is flush with the top surface of the beam, which helps to ensure driving stability. The corrugated plates have the characteristics of lateral flexibility and longitudinal stiffness, and can withstand the additional internal forces generated by the settlement difference between the old and new bridges and meet the longitudinal stiffness requirements of the bridge. At the same time, asphalt concrete has high strength and durability and can resist deformation and fatigue damage. The asphalt concrete can withstand the additional internal forces generated by the settlement difference between the old and new bridges together with the corrugated plates, effectively improving the crack resistance of the connection structure at the splicing point. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0016] Figure 2 This is a structural diagram of the corrugated plate in the utility model being spliced ​​with the old bridge and the steel-concrete composite beam;

[0017] Figure 3 This is a schematic diagram of the bridge of the present invention before splicing;

[0018] Figure 4 This is a schematic diagram of the old bridge being removed according to the present invention;

[0019] Among them, 1. Old bridge; 2. Steel-concrete composite beam; 3. Corrugated plate; 4. Shear nails; 5. Steel bars; 6. First concrete; 7. Second concrete; 8. Asphalt concrete. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0022] like Figures 1-4 As shown, the utility model provides a corrugated plate splicing structure for widening a bridge, including a corrugated plate 3, which connects the old bridge 1 to the steel-concrete composite beam 2 through a connecting piece. The corrugated plate 3 is located between the old bridge 1 and the steel-concrete composite beam 2, and asphalt concrete 8 is filled above the corrugated plate 3. The top surface of the asphalt concrete 8 is flush with the top surface of the old bridge 1 and the steel-concrete composite beam 2.

[0023] The steel-concrete composite beam 2 represents the new bridge. This device uses corrugated plate 3 for bridge widening. Compared to concrete, corrugated plate 3 offers superior fatigue resistance, tensile strength, shear strength, and lightweight properties. Its transverse flexibility and longitudinal rigidity allow it to withstand the additional internal forces generated by the differential settlement between the new and old bridges while meeting the bridge's longitudinal rigidity requirements.

[0024] The connecting parts are shear nails 4, which are welded and fixed on both sides of the corrugated plate 3. The two sides of the corrugated plate 3 are fixed to the old bridge 1 and the steel-concrete composite beam 2 through the shear nails 4, so that the new and old bridges become a whole.

[0025] Steel bars 5 are provided at the joint of the old bridge 1 and the steel-concrete composite beam 2, and shear nails 4 are fixedly connected to the steel bars 5. When the old bridge 1 is chiseled out, the steel bars 5 are retained, and the shear nails 4 and the steel bars 5 on the splicing side of the corrugated plate 3 and the old bridge 1 are tied and welded.

[0026] The first concrete 6 is filled between the corrugated plate 3 and the old bridge 1 , and the shear nails 4 are located in the first concrete 6 . The first concrete 6 is filled so that the old bridge 1 and the corrugated plate 3 form a whole, wherein the shear nails 4 , the steel bars 5 and the first concrete 6 play a fixing role.

[0027] The second concrete 7 is filled between the corrugated plate 3 and the steel-concrete composite beam 2, wherein the shear studs 4 on this side are located in the second concrete 7. The shear studs 4 are integrated with the steel bars 5 removed from the old bridge 1, the flange plate splicing concrete of the old bridge 1 and the flange plate splicing concrete of the new bridge through the first concrete 6 and the second concrete 7.

[0028] In this device, concrete is used to cast the splicing structure of the corrugated plate 3, the removed part of the flange plate of the old bridge 1, and the reserved part of the flange plate of the new bridge to form a whole. Shear nails 4 are welded on the corrugated plate 3 to achieve effective connection between the splicing structure of the corrugated plate 3 and the old and new bridges. At the same time, the steel bars 5 removed from the old bridge 1 are retained to enhance the stability of the splicing structure of the corrugated plate 3 and reduce material waste. The splicing structure of the corrugated plate 3 has a light weight, the components are easy to install, and the construction period can be greatly shortened.

[0029] Asphalt concrete 8 is poured over the corrugated panels 3 until it is flush with the top surfaces of the old and new bridges. This device uses asphalt concrete 8 poured onto the spliced ​​structure of the corrugated panels 3. Asphalt concrete 8 is strong and durable, anti-slip, and can withstand heavy loads, deformation, and fatigue damage. Together, the asphalt concrete 8 and the corrugated panels 3 withstand the additional internal forces generated by the settlement difference between the old and new bridges. Using asphalt concrete 8 throughout the corrugated panels 3 simplifies construction and facilitates maintenance and replacement.

[0030] Working principle: When pouring the concrete part of the steel box girder of the newly built steel-concrete composite beam 2, space is reserved on the splicing side of the flange plate of the new bridge. The concrete of the flange plate of the old bridge 1 is chiseled out, and the internal steel bars 5 are retained. After the strength of the concrete part of the newly built steel-concrete composite beam 2 meets the requirements, the corrugated plate 3 splicing structure is used to connect the new and old bridges. The shear nails 4 welded on the corrugated plate 3 are tied and welded to the steel bars 5 chiseled out of the old bridge 1. By pouring the first concrete 6 and the second concrete 7 on both sides of the shear nails 4, the corrugated plate 3 and the old and new bridges form a whole. Asphalt concrete 8 is poured on the corrugated plate 3 until it is flush with the top surface of the beam. The asphalt concrete 8 can bear the additional internal force caused by the settlement difference between the new and old bridges together with the corrugated plate 3.

[0031] The widening structure of this device is novel and the construction is simple. The structural performance after widening is reliable. It can widen the bridge deck while retaining the existing bridge section, meet the growing traffic demand, and has good social benefits.

[0032] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0033] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A bridge widening corrugated plate splicing structure, characterized in that: include: A corrugated plate (3), wherein the corrugated plate (3) connects the old bridge (1) and the steel-concrete composite beam (2) via a connecting piece, the corrugated plate (3) is located between the old bridge (1) and the steel-concrete composite beam (2), and asphalt concrete (8) is filled above the corrugated plate (3), wherein the top surface of the asphalt concrete (8) is flush with the top surfaces of the old bridge (1) and the steel-concrete composite beam (2); The connecting member is a shear nail (4), and the shear nails (4) are welded on both sides of the corrugated plate (3). The corrugated plate (3) is fixed to the old bridge (1) and the steel-concrete composite beam (2) respectively through the shear nails (4); A steel bar (5) is provided at the splicing portion of the old bridge (1), and the shear nails (4) are fixedly connected to the steel bar (5); A first concrete (6) is filled between the old bridge (1) and the corrugated plate (3), and the shear studs (4) are located in the first concrete (6); A second concrete (7) is filled between the steel-concrete composite beam (2) and the corrugated plate (3), and the shear studs (4) of the corrugated plate (3) close to the steel-concrete composite beam (2) are located in the second concrete (7); The shear studs (4) and the steel bars (5) are bound and welded.

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