A prefabricated corrugated web steel box girder unit structure

Abstract

This utility model relates to a bridge structure, specifically to a prefabricated corrugated web steel box girder unit structure. The technical solution of this utility model is as follows: A prefabricated corrugated web steel box girder unit structure includes a top plate, top plate welded components, a bottom plate, bottom plate welded components, a corrugated web, high-strength bolt sets A and B, and transverse diaphragms. Two top plate welded components are fixedly disposed on both sides of the top plate, and two bottom plate welded components are fixedly disposed on both sides of the bottom plate. The upper end of the corrugated web is connected to the two top plate welded components via multiple sets of high-strength bolt sets A, and the lower end of the corrugated web is connected to the two bottom plate welded components via multiple sets of high-strength bolt sets B. Two transverse diaphragms are fixedly connected to both ends of the top plate and both ends of the bottom plate, respectively. The prefabricated corrugated web steel box girder unit structure provided by this utility model is structurally stable, reliably stressed, convenient to construct, and easy to maintain.

Description

Technical Field

[0001] This utility model relates to a bridge structure, specifically to a prefabricated corrugated web steel box girder unit structure. Background Technology

[0002] Existing corrugated web steel box girders use welding to connect the upper and lower flanges to the web. Because the corrugated web is typically thin, the following problems easily arise during welding: ① Penetration issues: Welding thin plates easily penetrates the web, reducing the strength and reliability of the connection area; ② Heat-affected zone defects: Welding creates a significant heat-affected zone, leading to localized material degradation in the web; ③ High construction difficulty: The geometric characteristics of the corrugated web increase the difficulty of positioning and weld quality control during welding, easily causing weld defects; ④ Low weldability: Stress concentration areas easily form at the welded joints of the corrugated web, posing a high risk of fatigue failure during long-term service. Utility Model Content

[0003] This utility model provides a prefabricated corrugated web steel box girder unit structure, which is structurally stable, reliably stressed, convenient to construct, and easy to maintain.

[0004] The technical solution of this utility model is as follows:

[0005] A prefabricated corrugated web steel box girder unit structure includes a top plate, top plate welded components, a bottom plate, bottom plate welded components, a corrugated web, high-strength bolt pairs A and B, and transverse diaphragms. Two top plate welded components are fixedly installed on both sides of the top plate, and two bottom plate welded components are fixedly installed on both sides of the bottom plate. The upper end of the corrugated web is connected to the two top plate welded components through multiple sets of high-strength bolt pairs A, and the lower end of the corrugated web is connected to the two bottom plate welded components through multiple sets of high-strength bolt pairs B. The two transverse diaphragms are fixedly connected to both ends of the top plate and both ends of the bottom plate, respectively.

[0006] Furthermore, in the prefabricated corrugated web steel box girder frame structure, the top plate welded parts are provided with evenly distributed reserved holes A, the bottom plate welded parts are provided with evenly distributed reserved holes B, the upper end of the corrugated web is provided with reserved holes C corresponding to reserved holes A, and the lower end of the corrugated web is provided with reserved holes D corresponding to reserved holes B; high-strength bolt pair A is inserted into reserved holes A and reserved holes C to connect the upper end of the corrugated web to the two top plate welded parts, and high-strength bolt pair B is inserted into reserved holes B and reserved holes D to connect the lower end of the corrugated web to the two bottom plate welded parts.

[0007] Furthermore, in the prefabricated corrugated web steel box girder frame structure, a steel pad A is fitted on the high-strength bolt pair A, and the steel pad A is located between the end of the high-strength bolt of the high-strength bolt pair A and the welded part of the top plate; a steel pad B is fitted on the high-strength bolt pair B, and the steel pad B is located between the end of the high-strength bolt of the high-strength bolt of the high-strength bolt pair B and the welded part of the bottom plate.

[0008] Furthermore, in the prefabricated corrugated web steel box girder frame structure, the top plate, top plate welded components, bottom plate, bottom plate welded components, and diaphragms are connected by welding.

[0009] The beneficial effects of this utility model are as follows:

[0010] 1. Structural stability: The top plate, bottom plate, and diaphragms are not directly fixed to the corrugated web. The top plate, top plate welded parts, bottom plate, bottom plate welded parts, and diaphragms are welded together to form a frame. The thinner corrugated web is fixed in the frame to bear the force, ensuring the stability of the structure under stress.

[0011] 2. Reliable load bearing: By rationally arranging the bolt array and steel pads, high load bearing capacity and fatigue performance can be achieved, while ensuring the flatness of the connection surface and preventing stress concentration.

[0012] 3. Convenient construction: The installation process of bolted connections is simple, the accuracy is easy to control, and the construction period can be shortened.

[0013] 4. Easy maintenance: The bolted connection makes disassembly and replacement convenient, facilitating maintenance and reinforcement of the bridge during long-term service.

[0014] 5. Avoid penetration welding: Bolted connections do not involve fusion welding, which can effectively avoid penetration welding of corrugated web and heat-affected zone problems. Attached Figure Description

[0015] Figure 1 A structural breakdown diagram of a corrugated web steel box girder unit with prefabricated connections.

[0016] Figure 2 Schematic diagram of corrugated web;

[0017] Figure 3 This is a schematic diagram of a corrugated web steel box girder. Detailed Implementation

[0018] like Figure 1 , 2As shown, a prefabricated corrugated web steel box girder unit structure includes a top plate 1, top plate welded components 12, a bottom plate 4, bottom plate welded components 5, a corrugated web 3, high-strength bolt pairs A10 and B7, and a transverse diaphragm 2. Two top plate welded components 12 are fixedly installed on both sides of the top plate 1, and two bottom plate welded components 5 are fixedly installed on both sides of the bottom plate 4. The top plate welded components 12 have evenly distributed reserved holes A with spacing determined according to actual stress requirements and relevant specifications. The bottom plate welded components 5 have evenly distributed reserved holes B with spacing determined according to actual stress requirements and relevant specifications. The upper end of the corrugated web 3 has a reserved hole C9 corresponding to reserved hole A, and the lower end of the corrugated web 3 has a reserved hole D8 corresponding to reserved hole B. High-strength bolt pairs A10 and B7 are also present. 10. Insert pre-drilled holes A and C9 to connect the upper end of the corrugated web 3 to the two top plate welded parts 12. Insert high-strength bolt pair B7 into pre-drilled holes B and D8 to connect the lower end of the corrugated web 3 to the two bottom plate welded parts 5. A steel pad A11 is fitted on the high-strength bolt pair A10, and the steel pad A11 is located between the high-strength bolt end of the high-strength bolt pair A10 and the top plate welded part 12. A steel pad B6 is fitted on the high-strength bolt pair B7, and the steel pad B6 is located between the high-strength bolt end of the high-strength bolt pair B7 and the bottom plate welded part 5. Two transverse diaphragms 2 are fixedly connected to both ends of the top plate 1 and both ends of the bottom plate 4, respectively. The top plate 1, the top plate welded part 12, the bottom plate 4, the bottom plate welded part 5, and the transverse diaphragms 2 are connected by welding.

[0019] like Figure 3 As shown, the above-mentioned prefabricated corrugated web steel box girder unit structures are arranged side by side for overall splicing. The adjacent top plate welded parts 12 and bottom plate welded parts 5 are welded together in sequence to finally form a corrugated web steel box girder.

Claims

1. A prefabricated corrugated web steel box girder unit structure, characterized in that, It includes a top plate, top plate welded components, a bottom plate, bottom plate welded components, a corrugated web, high-strength bolt sets A and B, and transverse diaphragms. Two top plate welded components are fixedly installed on both sides of the top plate, and two bottom plate welded components are fixedly installed on both sides of the bottom plate. The upper end of the corrugated web is connected to the two top plate welded components through multiple sets of high-strength bolt sets A, and the lower end of the corrugated web is connected to the two bottom plate welded components through multiple sets of high-strength bolt sets B. Two transverse diaphragms are fixedly connected to both ends of the top plate and both ends of the bottom plate, respectively.

2. The prefabricated corrugated web steel box girder unit structure according to claim 1, characterized in that, The top plate weldment has evenly distributed reserved holes A, the bottom plate weldment has evenly distributed reserved holes B, the upper end of the corrugated web has a reserved hole C corresponding to reserved hole A, and the lower end of the corrugated web has a reserved hole D corresponding to reserved hole B; high-strength bolt pair A is inserted into reserved holes A and C to connect the upper end of the corrugated web to the two top plate weldments, and high-strength bolt pair B is inserted into reserved holes B and D to connect the lower end of the corrugated web to the two bottom plate weldments.

3. The prefabricated corrugated web steel box girder unit structure according to claim 2, characterized in that, A steel washer A is fitted onto high-strength bolt assembly A, with steel washer A positioned between the end of the high-strength bolt in high-strength bolt assembly A and the welded part of the top plate; a steel washer B is fitted onto high-strength bolt assembly B, with steel washer B positioned between the end of the high-strength bolt in high-strength bolt assembly B and the welded part of the bottom plate.

4. The prefabricated corrugated web steel box girder unit structure according to claim 1, characterized in that, The top plate, the top plate welded component, the bottom plate, the bottom plate welded component, and the diaphragm are connected by welding.

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