Steel box girder alignment and connection construction structure

Abstract

The utility model discloses a kind of steel box girder alignment and connection construction structure, for solving the disease problem caused by the insufficient welding strength of welding seam between two sections of steel box girder in prior art. The end along the length direction of steel box girder is connecting section, longitudinal ribbed plate and transverse ribbed plate are arranged on the bridge deck slab of connecting section and the bridge deck slab is divided into a checkered structure, bolt hole is provided on the transverse ribbed plate, high-strength bolt is arranged in the corresponding bolt hole of two sections of steel box girder and is tensioned and fixed, and the butt joint surface of two sections of steel box girder is welded and connected, and steel fiber reinforced concrete is laid on the bridge deck slab, which completely covers the connecting section of two steel box girders. The improvement of the present technology makes the two sections of steel box girder at the connection, not only welded connection, but also high-strength bolt connection is increased, so that the strength of the connection is increased, especially under the action of external load, due to the tensioning effect of high-strength bolt, the welding seam is not prone to disease.

Description

Technical Field

[0001] This utility model relates to the field of safe construction technology for steel box girders. Background Technology

[0002] Steel box girders are welded together in a steel structure workshop. They are typically manufactured in sections and then hoisted by lifting equipment for on-site assembly. Assembly usually involves aligning two adjacent steel box girders and simultaneously welding them together to form the final shape.

[0003] The weld seam is under significant stress, making it difficult to control the welding quality. In particular, defects are prone to occur at the weld seam, requiring improvement. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a steel box girder alignment and connection construction structure to solve the problem of insufficient welding strength of the weld joint between two steel box girders in the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: The steel box girder alignment and connection construction structure is characterized by the following: the ends along the length of the steel box girder are connection sections; longitudinal ribs and transverse ribs are set on the bridge deck of the connection section to divide the bridge deck into a grid structure; bolt holes are provided on the transverse ribs; high-strength bolts are inserted into the corresponding bolt holes of the two steel box girder sections and tightened for fixation; the butt joint surfaces of the two steel box girder sections are welded together; and steel fiber reinforced concrete is laid on the bridge deck, which completely covers the connection section of the two steel box girders.

[0006] Furthermore, triangular ribs and / or inclined ribs are welded to the bridge deck at the connecting section.

[0007] Furthermore, longitudinal ribs are welded onto the bridge deck where the main section of the steel box girder is located, and holes are drilled in the ribs and thin steel bars are inserted through them, which are arranged transversely along the steel box girder.

[0008] Furthermore, the steel box girder is composed of a bottom plate, two side webs, a bridge deck, and a diaphragm. The bottom plate, two side webs, and bridge deck form a trapezoidal profile. The diaphragm is located inside the steel box and is welded to the bottom plate, two side webs, and bridge deck.

[0009] The beneficial effects of this utility model are: This technological improvement allows for the addition of high-strength bolts at the joint between the two steel box girders, rather than just welded connections. This increases the strength of the joint, and the weld seams are less prone to defects under external loads due to the tensioning effect of the high-strength bolts.

[0010] In this technology, the ribs are thick steel plates with extended lengths welded to the bridge deck. They replace the original studs and are used to reinforce the bridge deck. After the steel fiber reinforced concrete is laid on the bridge deck, the steel fiber reinforced concrete and the ribs interlock, which can effectively improve the shear resistance of the steel fiber reinforced concrete and the bridge deck. Attached Figure Description

[0011] Figure 1 This is a 3D view of a steel box girder.

[0012] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle.

[0013] Figure 3 for Figure 1 Enlarged view of section B in the middle.

[0014] Figure 4 This is a 3D view of a steel box girder.

[0015] Figure 5 This is a diagram of the cable-stayed steel box girder.

[0016] Figure 6 This is a cross-sectional view of the steel box girder.

[0017] Figure 7 This is a plan view of the construction structure for aligning and connecting steel box girders.

[0018] In the picture: 01 Main body section, 02 Connecting section 10. Steel box girder, 11. Bottom plate, 12. Web plate, 13. Bridge deck, 14. Diaphragm. 20 longitudinal ribs, 21 thin steel bars, 30. Horizontal rib; 31. Bolt hole; 32. Triangular rib; 33. Diagonal rib. 40 high-strength bolts 50 weld seams. Detailed Implementation

[0019] The steel box girder alignment and connection construction structure is a reinforced connection structure for two steel box girders welded together. Specifically, there are not only welded seams and welded connections between the two steel box girder sections, but also high-strength bolts for mechanical reinforcement and grid-like ribs. Through the combined action of the ribs, high-strength bolts, and welds, the two steel box girder sections are connected. Theoretically, the connection strength at this point is higher than the strength of the steel box girder itself.

[0020] Refer to the instruction manual. Figures 1 to 7 Provide a detailed explanation.

[0021] The steel box girder 10 is composed of a bottom plate 11, two side webs 12, a bridge deck 13, and a middle partition 14. The bottom plate, two side webs, and bridge deck form a trapezoidal profile, and the bridge deck extends to both sides to form wings. The bridge deck has a wide width. The partition is located inside the steel box and is used to connect the bottom plate, two side webs, and bridge deck, so that the steel box girder has high rigidity.

[0022] Along the length of the steel box girder 10, it can be divided into a main section 01 and a connecting section 02. Longitudinal ribs 20 are welded onto the bridge deck of the main section to form reinforcement. Specifically, these longitudinal ribs 20 are arranged along the longitudinal direction of the bridge, significantly enhancing the bending resistance of the bridge deck. The height of these ribs is approximately 1 cm, avoiding excessive height, to enhance the rigidity of the steel box girder during asphalt paving. Thin reinforcing bars 21 are drilled and inserted into the aforementioned longitudinal ribs. These bars are arranged transversely along the steel box girder and integrated, forming a single unit during asphalt or steel fiber reinforced concrete paving. This design of the thin reinforcing bars and longitudinal ribs can replace the studs in the original steel box girder bridge deck, thereby improving the bond strength between the steel fiber reinforced concrete and the bridge deck, effectively preventing shear forces at the interface.

[0023] The connecting section 02 is composed of denser longitudinal and transverse ribs, which divide the bridge deck into a grid structure. Bolt holes 31 are pre-set on the transverse ribs 30, and the ribs at the connecting section are further reinforced, for example, by adding triangular ribs 32 and diagonal ribs 33.

[0024] During the docking process, the two steel box girders are joined together, and then high-strength bolts 40 are used to assist in the fastening connection between the two sections of the steel box girder. Under the action of the high-strength bolts, the two sections of the steel box girder are docked. During the docking process, the interface should be flush. Welding is then used to weld the two sections of the steel box girder together. After welding, weld 50 is formed, which completely covers the mating surfaces of the two sections of the steel box girder. After welding, a torque wrench is used to further tighten the high-strength bolts. After tightening, the two sections of the steel box girder are joined together as one unit.

[0025] Once all the steel box girders are connected and secured, steel fiber reinforced concrete can be laid on the bridge deck to complete one operation.

[0026] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Without departing from the spirit of the present utility model, all modifications and improvements to the present utility model by those skilled in the art should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A construction structure for aligning and connecting steel box girders, characterized in that: The ends along the length of the steel box girder are the connecting sections. Longitudinal and transverse ribs are set on the bridge deck of the connecting sections to divide the bridge deck into a grid structure. Bolt holes are set on the transverse ribs. High-strength bolts are inserted into the corresponding bolt holes of the two steel box girder sections and tightened for fixation. The butt joint surfaces of the two steel box girder sections are welded together. Steel fiber reinforced concrete is laid on the bridge deck, which completely covers the connecting section of the two steel box girders.

2. The steel box girder alignment and connection construction structure according to claim 1, characterized in that, Triangular ribs and / or inclined ribs are welded to the bridge deck at the connecting section.

3. The steel box girder alignment and connection construction structure according to claim 2, characterized in that, Longitudinal ribs are welded onto the bridge deck where the main section of the steel box girder is located, and thin steel bars are drilled and inserted through holes in the ribs, which are arranged transversely along the steel box girder.

4. The steel box girder alignment and connection construction structure according to claim 3, characterized in that, The steel box girder consists of a bottom plate, two side webs, a bridge deck, and diaphragms. The bottom plate, two side webs, and bridge deck form a trapezoidal profile. The diaphragms are located inside the steel box and are welded to the bottom plate, two side webs, and bridge deck.

Images