A combined bridge deck panel joint welding connection structure with a flat thin steel plate bottom die

Abstract

The application discloses a combined bridge deck panel joint welding connection structure with a plane thin steel plate bottom die, which comprises a first plane thin steel plate bottom die, a second plane thin steel plate bottom die and a steel strip. The steel strip is arranged below the butt joint of the first plane thin steel plate bottom die and the second plane thin steel plate bottom die, and the steel strip is fixedly connected with the bottom surface edge of the first plane thin steel plate bottom die. The bottom surface edge of the second plane thin steel plate bottom die is overlapped on the steel strip and is aligned with the side top of the first plane thin steel plate bottom die. A top surface welding joint is arranged at the top surface butt joint of the first plane thin steel plate bottom die and the second plane thin steel plate bottom die. The scheme can avoid the overhead welding operation of the construction personnel under the bridge, all the welding is completed on the top surface, and the construction safety and quality are obviously improved.

Description

Technical Field

[0001] This application relates to the field of building engineering technology, and in particular to a composite bridge deck joint welding connection structure with a flat thin steel plate bottom formwork. Background Technology

[0002] In recent years, with the continuous growth of my country's steel production capacity, the application of composite structure bridges has become increasingly widespread. Among them, steel-concrete composite beam bridges, by placing the concrete bridge deck in the compression zone and the steel beams in the tension zone, and using connectors to combine the two, give full play to the material advantages of both steel and concrete, and have become one of the mainstream forms of composite structure bridges.

[0003] In traditional composite beam bridge construction, the bridge deck is mostly constructed using cast-in-place concrete. The specific process involves first erecting prefabricated steel beams in place, then setting up wooden formwork on top, followed by pouring concrete, vibration, and curing. Once the concrete reaches the design strength, the formwork is removed. While this method ensures the integrity of the bridge deck, the erection and removal of the wooden formwork is cumbersome, significantly increasing on-site workload and reducing construction efficiency and quality.

[0004] To address the aforementioned issues, a novel bridge deck structure has been proposed in engineering practice: replacing traditional wooden formwork with a flat, thin steel plate bottom formwork. This steel bottom formwork is prefabricated in a factory along with the steel beams. During bridge deck construction, concrete is poured directly onto the steel bottom formwork. After the concrete hardens, the steel bottom formwork and concrete share the load, eliminating the need for its removal. This improvement not only simplifies the construction process but also enhances the overall performance of the structure.

[0005] However, for ease of manufacturing and transportation, steel bottom formwork is usually prefabricated in segments, leading to joint connection problems during on-site assembly. Improper joint treatment will directly affect the overall safety, durability, and performance of the bridge. In existing technologies, to reduce the number of joints, steel bottom formwork segments are often designed to be relatively long, but this brings difficulties in prefabrication and transportation, as well as increased costs. Furthermore, traditional joint welding methods typically require welding on both the top and bottom surfaces. Welding the top surface is easier to implement, while welding the bottom surface requires overhead welding under the bridge, which is difficult and compromises quality, hindering the widespread application of this structural form. Utility Model Content

[0006] Embodiments of this application provide a composite bridge deck joint welding connection structure with a flat thin steel plate bottom mold.

[0007] To achieve the above objectives, embodiments of this application provide a composite bridge deck joint welding connection structure with a flat thin steel plate bottom mold, comprising:

[0008] First flat thin steel plate bottom mold

[0009] Second flat thin steel plate bottom mold

[0010] A steel strip is placed below the joint between the first and second planar thin steel plate bottom molds, and the steel strip is fixedly connected to the bottom edge of the first planar thin steel plate bottom mold; the bottom edge of the second planar thin steel plate bottom mold overlaps the steel strip and is tightly aligned with the side of the first planar thin steel plate bottom mold.

[0011] The top surface weld seam connects the first and second planar thin steel plate bottom molds at the top surface joint through the top surface weld seam.

[0012] In one embodiment, the steel strip and the first planar thin steel plate bottom mold are fixedly connected by intermittent spot welding.

[0013] In one embodiment, the steel strip has the same thickness as both the first planar thin steel plate bottom mold and the second planar thin steel plate bottom mold.

[0014] In one embodiment, both the upper surfaces of the first and second planar thin steel plate bottom molds are provided with vertical stiffening ribs.

[0015] In one embodiment, holes are provided on the vertical stiffening ribs.

[0016] In one embodiment, the composite bridge deck joint welding connection structure with a flat thin steel plate bottom formwork further includes: a first longitudinal steel bar and a second longitudinal steel bar; the first longitudinal steel bar and the second longitudinal steel bar are arranged alternately; the first longitudinal steel bar and the second longitudinal steel bar are both vertically arranged above the vertical stiffening ribs;

[0017] The first longitudinal reinforcement is welded to the vertical stiffening rib; at the joint between the first and second planar thin steel plate bottom formwork, two adjacent first longitudinal reinforcements are connected by single-sided welding.

[0018] The second longitudinal reinforcement is placed on the vertical stiffening rib. At the joint between the first and second planar thin steel plate bottom formwork, two adjacent second longitudinal reinforcements are connected by tying.

[0019] In one embodiment, the length of the welded two adjacent first longitudinal steel bars is 160 mm, and the length of the tied two adjacent second longitudinal steel bars is 320 mm.

[0020] In one embodiment, the combined bridge deck joint welding connection structure with flat thin steel plate bottom formwork is characterized in that it further includes: transverse reinforcing bars, which are vertically arranged above the first longitudinal reinforcing bars and the second longitudinal reinforcing bars;

[0021] The transverse reinforcement bars are connected to the first longitudinal reinforcement bars and the second longitudinal reinforcement bars by tying.

[0022] This application has the following advantages over the prior art:

[0023] The combined bridge deck joint welding connection structure provided in this embodiment can avoid construction workers from performing overhead welding operations under the bridge. All welding is completed on the top surface, which significantly improves construction safety and quality. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the welded connection structure of the combined bridge deck joint with a flat thin steel plate bottom formwork, as described in an embodiment of this application. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the structure of the first flat thin steel plate bottom mold in the combined bridge deck joint welding connection structure with flat thin steel plate bottom mold according to an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the structure of the second flat thin steel plate bottom mold in the combined bridge deck joint welding connection structure with flat thin steel plate bottom mold in the embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the welded connection structure of the combined bridge deck joint with a flat thin steel plate bottom formwork, as described in an embodiment of this application. Figure 2 ;

[0029] Figure 5 This is a schematic diagram of the welded connection structure of the combined bridge deck joint with a flat thin steel plate bottom formwork, as described in an embodiment of this application. Figure 2 ;

[0030] Figure 6 This is a schematic diagram of the welded connection structure of the combined bridge deck joint with a flat thin steel plate bottom mold according to an embodiment of this application. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0032] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can refer to fixed connection, detachable connection, or integral connection; for those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0034] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0035] Reference Figure 1 The embodiments of this application provide a composite bridge deck joint welding connection structure with a flat thin steel plate bottom mold, including:

[0036] First flat thin steel plate bottom mold 1,

[0037] Second flat thin steel plate bottom mold 2,

[0038] Steel strip 3 is disposed below the joint between the first flat thin steel plate bottom mold 1 and the second flat thin steel plate bottom mold 2, and the steel strip 3 is fixedly connected to the bottom edge of the first flat thin steel plate bottom mold 1; the bottom edge of the second flat thin steel plate bottom mold 2 overlaps on the steel strip 3 and is tightly aligned with the side of the first flat thin steel plate bottom mold 1.

[0039] Top surface weld 4: The first flat thin steel plate bottom mold 1 and the second flat thin steel plate bottom mold 2 are connected at the top surface joint through the top surface weld 4.

[0040] Specifically, both the first flat thin steel plate bottom mold 1 and the second flat thin steel plate bottom mold 2 are made of high-strength steel, possessing excellent load-bearing capacity and resistance to deformation. The thickness of the first flat thin steel plate bottom mold 1 and the second flat thin steel plate bottom mold 2 can be set according to actual needs, typically using rectangular thin steel plates with a thickness of 3mm, prefabricated in sections at the factory for easy transportation.

[0041] The thickness and width of the steel strip 3 can be set according to actual needs. The steel strip 3 can have the same thickness as both the first flat thin steel plate bottom mold 1 and the second flat thin steel plate bottom mold 2. A strip of steel 3 with a thickness of 3mm and a width of 30mm is selected and positioned directly below the joint between the first flat thin steel plate bottom mold 1 and the second flat thin steel plate bottom mold 2. Before assembly, if... Figure 2 As shown, the steel strip 3 is pre-fixed to the bottom edge of the first flat thin steel plate bottom mold 1. During on-site assembly, the bottom edge of the second flat thin steel plate bottom mold 2 is directly overlapped onto the steel strip 3, and the second flat thin steel plate bottom mold 2 is pushed so that its side edge is tightly aligned with the side edge of the first flat thin steel plate bottom mold 1. Through this design, the steel strip 3 simultaneously serves as support, positioning, and padding. Finally, the operator performs welding at the top at the joint between the first flat thin steel plate bottom mold 1 and the second flat thin steel plate bottom mold 2, forming a top weld 4, thereby firmly connecting the first flat thin steel plate bottom mold 1 and the second flat thin steel plate bottom mold 2 into a whole.

[0042] The combined bridge deck joint welding connection structure provided in this embodiment can avoid construction workers from performing overhead welding operations under the bridge. All welding is completed on the top surface, which significantly improves construction safety and quality.

[0043] In one embodiment, reference continues to be made to Figure 1 The steel strip 3 and the first flat thin steel plate bottom mold 1 are fixedly connected by intermittent spot welding 5.

[0044] Specifically, the spacing of spot welding 5 can be determined according to the length and stability requirements of the steel strip 3, for example, spot welding can be performed every 200-300mm.

[0045] The connection method between the steel strip and the first flat thin steel plate bottom mold provided in this embodiment can maintain the relative position of the steel strip and the first flat thin steel plate bottom mold during transportation and hoisting. Furthermore, due to its small weld points and low heat input, it will not cause excessive deformation of the first flat thin steel plate bottom mold. During subsequent welding of the top surface weld, these spot welds will be melted into the weld, forming an integral connection.

[0046] In one embodiment, reference continues to be made to Figure 2 and such Figure 3 As shown, both the first planar thin steel plate bottom mold 1 and the second planar thin steel plate bottom mold 2 are provided with vertical stiffening ribs 6 on their upper surfaces. Among them, the vertical stiffening ribs 6 are provided with holes 61.

[0047] Specifically, the vertical stiffening ribs 6 are welded along the transverse bridge direction to the upper surfaces of the first planar thin steel plate bottom mold 1 and the second planar thin steel plate bottom mold 2. By setting the vertical stiffening ribs 6, the rigidity and stability of the thin steel plate bottom mold can be increased.

[0048] The height and thickness of the vertical stiffening rib 6 can be set according to actual needs. The preferred vertical stiffening rib 6 is a steel strip with a height of 200mm and a thickness of 3mm.

[0049] To further enhance the bonding between the vertical stiffening ribs 6 and the concrete and prevent them from becoming detached, several holes 61 are made in the vertical stiffening ribs 6. The diameter of the holes 61 is preferably 60 mm, and the spacing is 200 mm. These holes 61 allow cement slurry to pass through during concrete pouring, forming a "mortise and tenon" structure, which greatly enhances the bond strength and shear resistance between the steel and the concrete.

[0050] In one embodiment, such as Figure 4 As shown, the composite bridge deck joint welding connection structure with flat thin steel plate bottom formwork also includes: a first longitudinal steel bar 7 and a second longitudinal steel bar 8; the first longitudinal steel bar 7 and the second longitudinal steel bar 8 are arranged alternately; the first longitudinal steel bar 7 and the second longitudinal steel bar 8 are both arranged vertically above the vertical stiffening rib 6;

[0051] The first longitudinal steel bar 7 is welded to the vertical stiffening rib 6; at the joint between the first planar thin steel plate bottom mold 1 and the second planar thin steel plate bottom mold 2, two adjacent first longitudinal steel bars 7 are connected by single-sided welding.

[0052] The second longitudinal reinforcement 8 is placed on the vertical stiffening rib 6. At the joint between the first flat thin steel plate bottom mold 1 and the second flat thin steel plate bottom mold 2, two adjacent second longitudinal reinforcements 8 are connected by binding.

[0053] like Figure 5 As shown, the composite bridge deck joint welding connection structure with flat thin steel plate bottom formwork also includes: transverse steel bar 9, which is vertically arranged above the first longitudinal steel bar 7 and the second longitudinal steel bar 8.

[0054] The transverse reinforcement 9 is connected to the first longitudinal reinforcement 7 and the second longitudinal reinforcement 8 by binding.

[0055] Among them, the length of the welding of two adjacent first longitudinal steel bars 7 is 160mm, and the length of the binding of two adjacent second longitudinal steel bars 8 is 320mm.

[0056] Specifically, the diameters of the first longitudinal reinforcement 7, the second longitudinal reinforcement 8, and the transverse reinforcement 9, as well as the spacing between the reinforcements, can be set according to actual needs. Preferably, the diameter of all reinforcements is 16mm, the spacing between two adjacent first longitudinal reinforcements 7 is 300mm, and the spacing between two adjacent second longitudinal reinforcements 8 is 100mm, meaning two second longitudinal reinforcements 8 are placed between two adjacent first longitudinal reinforcements 7. The spacing between two adjacent transverse reinforcements 9 is 100mm.

[0057] The first longitudinal reinforcement 7, the second longitudinal reinforcement 8, and the transverse reinforcement 9 form a steel mesh.

[0058] The first longitudinal steel bar 7 is welded to the vertical stiffening rib 6 to form a fixed node. At the joint, the ends of two adjacent first longitudinal steel bars 7 are connected by single-sided welding, and the weld length is controlled within 160mm to ensure reliable force transmission.

[0059] The second longitudinal reinforcement 8 is simply placed on the vertical stiffener 6 without being welded to it. At the joint, adjacent second longitudinal reinforcements 8 are connected by lap splicing with wire, with a preferred lap length of 320mm. This differentiated connection between the first longitudinal reinforcement 7 and the second longitudinal reinforcement 8 and the vertical stiffener 6 ensures the continuity of the critical force transmission path through welding while simplifying construction through tying, achieving a balance between safety and efficiency.

[0060] The transverse reinforcing bars 9 are connected to all the first longitudinal reinforcing bars 7 and the second longitudinal reinforcing bars 8 below by binding with wire at the intersection points, forming a stable spatial reinforcing mesh together.

[0061] The composite bridge deck joint welding connection structure with a flat thin steel plate bottom formwork provided in this application requires concrete pouring on the aforementioned structure during construction, such as... Figure 6 As shown.

[0062] In this embodiment, the steel mesh is welded to the vertical stiffening ribs to form a composite steel structure of thin steel plate + steel reinforcement skeleton, which enhances the rigidity of the steel structure and provides stability to the vertical stiffening ribs through the supporting effect of the steel reinforcement.

[0063] The composite bridge deck joint welding connection structure with a flat thin steel plate bottom formwork provided in this application connects adjacent segments by spot welding one side of a transversely continuous steel strip to the first flat thin steel plate bottom formwork. The first flat thin steel plate bottom formwork with the steel strip and the second flat thin steel plate bottom formwork without the steel strip are spliced ​​top to top and welded together at the top. Vertical stiffening ribs with openings are arranged on the thin steel plate bottom formwork, and the steel mesh is welded to the vertical stiffening ribs. Finally, concrete is poured on the thin steel plate bottom formwork in one go, so that the concrete at the joint is integrated with the concrete in other locations.

[0064] The advantages of this application are as follows: (1) The steel strip welded to the bottom formwork of the thin steel plate on the first plane plays a supporting and positioning role during construction, which facilitates the splicing and top connection of the bottom formwork of the thin steel plates on both sides, and the connection is reliable, which improves the convenience and efficiency of construction. (2) The steel strip can also participate in the stress when the concrete has not yet hardened, preventing the bottom formwork from deforming due to the self-weight of the concrete, and the construction quality is more reliable. (3) The steel mesh and the stiffening rib are welded to form a steel plate + steel reinforcement skeleton, which has higher structural rigidity. They jointly resist the load during the construction and operation stages, and the overall structure is better. At the same time, the steel reinforcement plays a supporting role for the stiffening rib to prevent the stiffening rib from becoming unstable.

[0065] The construction method for the composite bridge deck with the welded connection structure of the composite bridge deck joint using the above embodiment includes the following steps:

[0066] S1. The steel strip 3 is pre-fixed to the bottom edge of the first planar thin steel plate bottom mold 1.

[0067] Specifically, in the factory or construction site, the steel strip 3 is pre-fixed to the bottom edge of the first planar thin steel plate bottom mold 1 by intermittent spot welding 5.

[0068] S2. Place the first flat thin steel plate bottom mold 1 at the preset position on the top surface of the lower steel beam, wherein the steel strip 3 is located between the first flat thin steel plate bottom mold 1 and the top surface of the steel beam.

[0069] Specifically, using hoisting equipment, the first flat thin steel plate bottom formwork 1 with steel strip 3 is hoisted to the designed position on the top surface of the already erected lower steel beam and adjusted into place. At this time, the steel strip 3 is clamped between the first flat thin steel plate bottom formwork 1 and the top surface of the steel beam.

[0070] S3. Place the second flat thin steel plate so that the bottom edge of the second flat thin steel plate overlaps the steel strip 3 and is tightly aligned with the side of the bottom mold 1 of the first flat thin steel plate.

[0071] Specifically, the second flat thin steel plate bottom formwork 2 is hoisted, ensuring its bottom edge accurately overlaps the cantilevered portion of the steel strip 3, and then pushed horizontally to align it tightly with the side edge of the first flat thin steel plate bottom formwork 1. During this process, the steel strip 3 ensures that the bottom surfaces of both are flush and at the same height.

[0072] S4. Weld the first flat thin steel plate bottom mold 1 and the second flat thin steel plate bottom mold 2 at the top surface joint to form the top surface weld 4.

[0073] Specifically, welding is performed at the top surface joint of the first planar thin steel plate bottom mold 1 and the second planar thin steel plate bottom mold 2 to form a continuous and reliable top surface weld 4.

[0074] S5. Weld the first longitudinal steel bar 7 and place the second longitudinal steel bar 8 on the vertical stiffening ribs 6 on the upper surface of the first flat thin steel plate bottom mold 1 and the second flat thin steel plate bottom mold 2.

[0075] Specifically, above the first flat thin steel plate bottom mold 1 and the second flat thin steel plate bottom mold 2, the first longitudinal steel bar 7 and the second longitudinal steel bar 8 are laid according to the design requirements, and the welding of the first longitudinal steel bar 7 to the vertical stiffening rib 6 is completed, and the welding of the first longitudinal steel bar 7 and the lapping of the second longitudinal steel bar 8 are completed at the joint.

[0076] S6. Tie the transverse reinforcement 9 above the first longitudinal reinforcement 7 and the second longitudinal reinforcement 8.

[0077] Specifically, transverse steel bars 9 are laid above the longitudinal steel mesh and tied with wire at all intersections to form a complete steel skeleton for the bridge deck.

[0078] S7. Concrete is poured integrally onto the first flat thin steel plate bottom formwork 1, the second flat thin steel plate bottom formwork 2, the first longitudinal reinforcement 7, the second longitudinal reinforcement 8, and the transverse reinforcement 9 after they are connected to form a complete composite bridge deck.

[0079] Specifically, C40 concrete, 260mm thick, is poured monolithically onto the completed steel structure system in one go. During pouring, thorough vibration is required to ensure the concrete is dense, especially ensuring that the pores 61 and joints are completely filled. After pouring, the concrete is covered and watered for curing as required until it reaches the design strength, ultimately forming a complete and well-integrated composite bridge deck.

[0080] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A composite bridge deck panel joint weld connection structure with a flat thin steel plate bottom die, characterized by, include: First flat thin steel plate bottom mold (1), Second flat thin steel plate bottom mold (2), A steel strip (3) is provided below the butt joint of the first flat thin steel plate bottom mold (1) and the second flat thin steel plate bottom mold (2), and the steel strip (3) is fixedly connected to the bottom edge of the first flat thin steel plate bottom mold (1); the bottom edge of the second flat thin steel plate bottom mold (2) overlaps the steel strip (3) and is aligned with the side of the first flat thin steel plate bottom mold (1). The top surface weld (4) connects the first flat thin steel plate bottom mold (1) and the second flat thin steel plate bottom mold (2) at the top surface joint through the top surface weld (4).

2. The composite bridge deck joint welding connection structure with a flat thin steel plate bottom mold according to claim 1, characterized in that, The steel strip (3) is fixedly connected to the first planar thin steel plate bottom mold (1) by intermittent spot welding (5).

3. The composite bridge deck joint weld connection structure with a flat steel plate bottom die as defined in claim 1, wherein The steel strip (3) has the same thickness as the first planar thin steel plate bottom mold (1) and the second planar thin steel plate bottom mold (2).

4. The composite bridge deck assembly of claim 1, wherein: The upper surfaces of the first planar thin steel plate bottom mold (1) and the second planar thin steel plate bottom mold (2) are both provided with vertical stiffening ribs (6).

5. The composite bridge deck joint weld connection structure with a flat steel plate bottom die as defined in claim 4, wherein The vertical stiffening rib (6) has holes (61).

6. The composite bridge deck joint weld connection structure with a flat steel plate bottom die as defined in claim 4, wherein Also includes: The first longitudinal reinforcement (7) and the second longitudinal reinforcement (8) are arranged alternately; the first longitudinal reinforcement (7) and the second longitudinal reinforcement (8) are both arranged vertically above the vertical stiffening rib (6); The first longitudinal steel bar (7) is welded to the vertical stiffening rib (6); at the joint between the first planar thin steel plate bottom mold (1) and the second planar thin steel plate bottom mold (2), two adjacent first longitudinal steel bars (7) are connected by single-sided welding. The second longitudinal steel bar (8) is placed on the vertical stiffening rib (6). At the joint between the first flat thin steel plate bottom mold (1) and the second flat thin steel plate bottom mold (2), two adjacent second longitudinal steel bars (8) are connected by binding.

7. The composite bridge deck joint weld connection structure with a flat steel sheet bottom die according to claim 6, characterized by, The length of the weld between two adjacent first longitudinal steel bars (7) is 160mm, and the length of the binding between two adjacent second longitudinal steel bars (8) is 320mm.

8. The composite bridge deck joint weld connection structure with a flat steel sheet bottom die according to claim 6, characterized by, Also includes: A transverse reinforcing bar (9) is vertically positioned above the first longitudinal reinforcing bar (7) and the second longitudinal reinforcing bar (8); The transverse steel bar (9) is connected to the first longitudinal steel bar (7) and the second longitudinal steel bar (8) by binding.

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