A detachable combined steel bridge deck pavement structure

Abstract

The present application relates to a kind of detachable combined steel bridge deck pavement structure, including steel bridge deck, corrugated steel plate, T-shaped stiffener, ribbed steel bar, ultra-high performance concrete, asphalt concrete wearing layer, high-strength bolt;Wherein, the corrugated steel plate is connected with the top plate of steel bridge deck by high-strength bolt in flat section, and corrugated section is arranged corresponding to longitudinal stiffener of steel bridge deck;The web of T-shaped stiffener is perforated, and the weld is connected with the flat section of corrugated steel plate in the direction of bridge;The ribbed steel bar is passed through the web of T-shaped stiffener perforated, then pours ultra-high performance concrete, realizes and steel bridge deck joint action;Finally, pour asphalt concrete wearing layer, form detachable combined steel bridge deck pavement structure.The present application provides a kind of detachable combined steel bridge deck pavement structure design reasonable, with the advantages such as large rigidity, light weight, easy to disassemble, can effectively improve the fatigue performance of steel bridge deck.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, and specifically to a detachable composite steel bridge deck pavement structure. Background Technology

[0002] Steel structure bridges are characterized by their light weight, high load-bearing capacity, convenient construction, and aesthetically pleasing design, making them widely used in long-span highway and railway bridges. With the increase in my country's steel production capacity and advancements in bridge construction technology, steel structure bridges are gradually expanding to include medium and small-span bridges, with their number and length increasing, playing a vital role in the implementation of the "Transportation Powerhouse" and "Dual-Carbon" strategies. However, steel structure bridges are prone to localized damage, fatigue, and corrosion during operation, significantly reducing the bridge's service life and increasing subsequent maintenance costs. Damage to the bridge deck is a typical form of damage to steel structure bridges, including cracks, ruts, potholes, shoving, bulging, and bond failure. Many famous bridges have experienced pavement damage shortly after opening, severely impacting vehicle traffic and the long-term performance of the steel main beams. The bridge deck pavement is directly related to wheel loads. Contact surfaces primarily serve to distribute wheel loads, prevent wear, and provide waterproofing, effectively protecting the steel bridge deck and improving its service life, driving comfort, and safety. Commonly used steel bridge deck paving materials include epoxy asphalt concrete, high-temperature mixed cast-in-place asphalt concrete, modified asphalt SMA, and resin asphalt composite systems (ERS). Damage to the steel bridge deck paving reduces its stiffness, making it unable to distribute wheel loads as designed, leading to a significant increase in fatigue stress at fatigue-sensitive details of the steel bridge deck. Therefore, timely repair of damaged areas is necessary. Bridge deck paving repairs typically involve replacing the damaged sections, requiring the closure of all or half of the road surface, significantly impacting normal traffic flow. Conventional steel bridge decks use studs as shear connections with the pavement, making it difficult to remove the existing paving during repairs, resulting in longer repair periods and higher costs.

[0003] In recent years, scholars and engineers both domestically and internationally have conducted a series of studies on steel bridge deck pavement structures. The widespread application of materials such as ultra-high performance concrete and reactive powder concrete has provided more possibilities for innovation in bridge deck pavement structures. Composite steel bridge deck pavement utilizes an ultra-high performance concrete layer and a steel bridge deck to share the load, improving the stiffness of the steel bridge deck and reducing its fatigue stress. Model tests and engineering practices conducted on the pavement structures of large-span steel bridges such as the Dongting Lake Second Bridge in Yueyang, Hunan, and the Foshan Fochen Bridge in Foshan, Guangdong, have shown that composite steel bridge deck pavement performs superiorly in improving the fatigue performance of steel bridge decks. Furthermore, the ultra-high performance concrete composite layer itself has good durability, which is expected to significantly extend the service life of steel bridge deck pavement. Currently, the service life of steel bridge deck pavement structures is generally 15 to 30 years. During the later stages of operation, how to quickly repair steel bridge deck pavement has become a hot topic of concern in the field of bridge engineering. Summary of the Invention

[0004] The purpose of this invention is to provide a detachable composite steel bridge deck pavement structure to solve the above problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A detachable composite steel bridge deck pavement structure, comprising:

[0007] Steel bridge deck, including top plate, longitudinal stiffening ribs, and transverse diaphragms;

[0008] The corrugated steel plate includes alternating corrugated sections and straight sections, wherein the corrugated sections and the steel bridge deck are arranged correspondingly to the longitudinal stiffening ribs, and the straight sections are connected to the top plate of the steel bridge deck by high-strength bolts.

[0009] The T-shaped stiffener includes a horizontally arranged flange and a vertically arranged web. The web has a circular web opening. The bottom of the web is connected to the straight section of the corrugated steel plate along the bridge direction by a weld.

[0010] Ribbed steel bars are arranged transversely and pass through the web openings on the T-shaped stiffening ribs;

[0011] Ultra-high performance concrete is poured on top of the corrugated steel plate and covered with T-shaped stiffening ribs and ribbed steel bars.

[0012] The asphalt concrete wearing course is poured on top of the ultra-high performance concrete.

[0013] Furthermore, the corrugated steel plate is arranged along the transverse direction of the bridge, the center of the corrugated section is aligned with the center of the longitudinal stiffening rib of the steel bridge deck, and the opening size of the corrugated section is smaller than the opening size of the longitudinal stiffening rib.

[0014] Furthermore, the thickness of the corrugated steel plate is 4-8 mm, and the corrugation angle is 30°-60°.

[0015] Furthermore, corresponding bolt holes need to be made in the straight section of the corrugated steel plate and the top plate of the steel bridge deck.

[0016] Furthermore, the T-shaped stiffening ribs are arranged along the bridge direction on the straight section of the corrugated steel plate, and two or more sets of T-shaped stiffening ribs are arranged between adjacent corrugated sections.

[0017] Furthermore, the height of the T-shaped stiffening rib is the same as the height of the corrugated steel plate, the flange width of the T-shaped stiffening rib is the same as its height, and the thickness of the flange and web is 6-10 mm.

[0018] Furthermore, the center of the web opening of the T-shaped stiffener is located at the center of the web height, and the radius of the opening is 2 to 3 times the radius of the ribbed steel bar.

[0019] Furthermore, the ribbed steel bars are arranged laterally and placed inside the openings in the web, with both ends of the ribbed steel bars placed on the corrugated steel plate.

[0020] Furthermore, the ribbed steel bars and high-strength bolts are arranged in a staggered manner, and the high-strength bolts are tightened below the top plate of the steel bridge deck.

[0021] Furthermore, the ultra-high performance concrete is poured to a thickness of 60-80 mm, and the asphalt concrete wearing layer is poured to a thickness of 15-25 mm.

[0022] The beneficial effects of this invention are as follows: It provides a detachable composite steel bridge deck pavement structure, which, through the combined use of steel bridge deck panels, ultra-high performance concrete, asphalt concrete wearing course, top plate, longitudinal stiffening ribs, transverse diaphragms, corrugated steel plates, T-shaped stiffening ribs, and ribbed steel bars, achieves the effect of creating a steel bridge deck pavement structure that can be quickly replaced, resulting in the following beneficial effects:

[0023] 1. The pavement structure is lightweight, has high rigidity, and good overall performance. It makes full use of the stress characteristics of steel and ultra-high performance concrete, which greatly reduces the self-weight of the bridge deck pavement. The perforated steel plate shear connection method is used to form a composite bridge deck pavement system with corrugated steel plates and ultra-high performance concrete materials, which improves the rigidity of the bridge deck pavement and ensures the overall performance of the structure.

[0024] 2. Construction quality is easy to control, and fatigue performance is excellent; the detachable composite steel bridge deck pavement structure is mainly connected to the steel bridge deck with high-strength bolts. The welds connecting the T-shaped stiffening ribs and the corrugated steel plates are completed in the factory, effectively avoiding the shortcomings of difficult-to-control on-site welding quality; the opening of the corrugated steel plates is smaller than that of the longitudinal stiffening ribs of the steel bridge deck, which can effectively spread the vehicle wheel load to the surroundings, significantly reduce the local fatigue stress of the weld connecting the top plate of the steel bridge deck and the longitudinal stiffening ribs, and improve the fatigue performance of the steel bridge deck.

[0025] 3. Convenient construction and the pavement layer can be completely disassembled, which facilitates later maintenance and replacement; the detachable combined steel bridge deck pavement structure uses corrugated steel plates as the bottom formwork of ultra-high performance concrete, which can effectively reduce construction costs; the combined pavement structure is connected to the steel bridge deck structure by high-strength bolts, and can be completely disassembled and replaced in the later stage, which provides convenience for later maintenance and management. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the detachable combined steel bridge deck pavement structure invented;

[0027] Figure 2 This is a schematic diagram of the high-strength bolt hole layout on the top plate of the steel bridge deck according to an embodiment of this application;

[0028] Figure 3This is a schematic diagram of a corrugated steel plate according to an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the T-shaped stiffening rib in an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the transverse bridge layout of the ribbed steel bars according to an embodiment of this application.

[0031] In the diagram: 1. Steel bridge deck; 11. Top plate; 12. Longitudinal stiffener; 13. Transverse diaphragm; 14. High-strength bolt holes in the top plate; 2. Corrugated steel plate; 21. Corrugated section; 22. Straight section; 23. High-strength bolt holes in the corrugated steel plate; 3. T-shaped stiffener; 31. Flange; 32. Web plate; 33. Web plate opening; 4. Ribbed steel bar; 5. Ultra-high performance concrete; 6. Asphalt concrete wearing course; 7. High-strength bolts. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0033] refer to Figures 1 to 5 A detachable composite steel bridge deck pavement structure, including

[0034] The steel bridge deck 1 includes a top plate 11, longitudinal stiffening ribs 12, and transverse diaphragms 13;

[0035] The corrugated steel plate 2 includes alternating corrugated sections 21 and straight sections 22. The corrugated sections 21 and the steel bridge deck 1 are arranged corresponding to the longitudinal stiffening ribs 12. The straight sections 22 are connected to the top plate 11 of the steel bridge deck 1 by high-strength bolts 7.

[0036] The T-shaped stiffening rib 3 includes a horizontally arranged flange 31 and a vertically arranged web 32. The web 32 is provided with a circular web opening 33. The bottom of the web 32 is connected to the straight section 22 of the corrugated steel plate 2 along the bridge direction by a weld.

[0037] Ribbed steel bar 4, arranged transversely, passes through web opening 33 on T-shaped stiffening rib 3;

[0038] Ultra-high performance concrete 5 is poured on top of the corrugated steel plate 2 and covers the T-shaped stiffening ribs 3 and ribbed steel bars 4.

[0039] The asphalt concrete wearing course 6 is poured on top of the ultra-high performance concrete 5.

[0040] The corrugated steel plate 2 is arranged along the transverse direction of the bridge. The center of the corrugated section 21 is aligned with the center of the longitudinal stiffening rib 12 of the steel bridge deck 1. The opening size of the corrugated section 21 is smaller than the opening size of the longitudinal stiffening rib 12.

[0041] The corrugated steel plate 2 has a thickness of 4-8 mm and a corrugation angle of 30°-60°.

[0042] The straight section 22 of the corrugated steel plate 1 and the top plate 11 of the steel bridge deck 1 need to have corresponding bolt holes.

[0043] The T-shaped stiffening ribs 3 are arranged along the bridge direction on the straight section 22 of the corrugated steel plate 2, and two or more sets of T-shaped stiffening ribs 3 are arranged between adjacent corrugated sections 21.

[0044] The height of the T-shaped stiffening rib 3 is the same as the height of the corrugated steel plate 2, the width of the flange 31 of the T-shaped stiffening rib 3 is the same as its height, and the thickness of the flange 31 and the web 32 is 6-10 mm.

[0045] The center of the web opening 33 of the T-shaped stiffener 3 is located at the center of the height of the web 32, and the radius of the opening is 2 to 3 times the radius of the ribbed steel bar 4.

[0046] The ribbed steel bars 4 are arranged laterally and placed in the web openings 33, with both ends of the ribbed steel bars 4 placed on the corrugated steel plates 2.

[0047] The ribbed steel bars 4 and high-strength bolts 7 are arranged in a staggered manner, with the high-strength bolts 7 located below the top plate 11 of the steel bridge deck 1.

[0048] The ultra-high performance concrete 5 is poured to a thickness of 60-80mm, and the asphalt concrete wearing layer 6 is poured to a thickness of 15-25mm.

[0049] The above embodiments are used to further illustrate the present invention, but do not limit the present invention to these specific embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be understood as falling within the protection scope of the present invention.

Claims

1. A detachable composite steel bridge deck pavement structure, characterized in that: include: Steel bridge deck, including top plate, longitudinal stiffening ribs, and transverse diaphragms; The corrugated steel plate includes alternating corrugated sections and straight sections, wherein the corrugated sections and the steel bridge deck are arranged correspondingly to the longitudinal stiffening ribs, and the straight sections are connected to the top plate of the steel bridge deck by high-strength bolts. The T-shaped stiffener includes a horizontally arranged flange and a vertically arranged web. The web has a circular web opening. The bottom of the web is connected to the straight section of the corrugated steel plate along the bridge direction by a weld. Ribbed steel bars are arranged transversely and pass through the web openings on the T-shaped stiffening ribs; Ultra-high performance concrete is poured on top of the corrugated steel plate and covered with T-shaped stiffening ribs and ribbed steel bars; Asphalt concrete wearing course, poured on top of the ultra-high performance concrete; The corrugated steel plate is arranged along the transverse direction of the bridge, and the center of the corrugated section is aligned with the center of the longitudinal stiffening rib of the steel bridge deck. The opening size of the corrugated section is smaller than the opening size of the longitudinal stiffening rib.

2. The detachable composite steel bridge deck pavement structure according to claim 1, characterized in that: The thickness of the corrugated steel plate is 4-8 mm, and the corrugation angle is 30°-60°.

3. The detachable composite steel bridge deck pavement structure according to claim 1, characterized in that: The straight sections of the corrugated steel plate and the top plate of the steel bridge deck need to have corresponding bolt holes.

4. The detachable composite steel bridge deck pavement structure according to claim 1, characterized in that: The T-shaped stiffening ribs are arranged along the bridge direction on the straight section of the corrugated steel plate, and two or more sets of T-shaped stiffening ribs are arranged between adjacent corrugated sections.

5. The detachable composite steel bridge deck pavement structure according to claim 1, characterized in that: The height of the T-shaped stiffening rib is the same as the height of the corrugated steel plate, the flange width of the T-shaped stiffening rib is the same as its height, and the thickness of the flange and web is 6-10 mm.

6. The detachable composite steel bridge deck pavement structure according to claim 5, characterized in that: The center of the web opening of the T-shaped stiffener is located at the center of the web height, and the radius of the opening is 2 to 3 times the radius of the ribbed steel bar.

7. The detachable composite steel bridge deck pavement structure according to claim 1, characterized in that: The ribbed steel bars are arranged laterally and placed in the openings of the web of the T-shaped stiffening ribs, with both ends of the ribbed steel bars placed on the corrugated steel plate.

8. A detachable composite steel bridge deck pavement structure according to claim 1, characterized in that: The ribbed steel bars and high-strength bolts are arranged in a staggered manner, and the high-strength bolts are tightened below the top plate of the steel bridge deck.

9. A detachable composite steel bridge deck pavement structure according to claim 1, characterized in that: The ultra-high performance concrete is poured to a thickness of 60-80 mm, and the asphalt concrete wearing course is poured to a thickness of 15-25 mm.

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