Corrugated steel bottom plate-T-shaped steel rib plate-UHPC combined bridge deck slab

Abstract

The utility model belongs to the technical field of bridge engineering, and discloses a corrugated steel bottom plate-T-shaped steel rib plate-UHPC combined bridge deck slab which comprises a corrugated steel bottom plate, wave crests and wave troughs of the corrugated steel bottom plate are sequentially and alternately arranged in the transverse direction of a bridge deck and extend in the longitudinal direction of the bridge deck, and the wave crests and the wave troughs of the corrugated steel bottom plate are arranged in the longitudinal direction of the bridge deck. A longitudinal T-shaped steel rib plate is fixed in each trough of the corrugated steel bottom plate, a plurality of steel bar through holes are evenly distributed in the tops of webs of the T-shaped steel rib plates in the longitudinal direction, the positions of the steel bar through holes of the longitudinal T-shaped steel rib plates correspond one by one in the transverse direction, transverse steel bars penetrate through the longitudinal T-shaped steel rib plates, and a plurality of longitudinal steel bars are evenly distributed on the transverse steel bars. An ultra-high performance concrete filling layer is poured in a space formed by the corrugated steel bottom plate, the T-shaped steel rib plate and the reinforcing mesh; the problems that an orthotropic steel bridge deck is cracked due to fatigue, an asphalt pavement layer of a steel bridge deck is damaged, and a steel-UHPC combined bridge deck is complex in construction, low in speed and the like are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge engineering, and particularly relates to a corrugated steel bottom plate - T - shaped steel rib - UHPC composite bridge deck. Background Technique

[0002] The bridge deck is an important part of the bridge. It directly bears wheel loads and transfers the loads to the main beam structure. The traditional orthotropic steel deck (abbreviated as OSD) participates in the force of the main beam as the upper flange plate, which can save steel and has excellent local mechanical properties, reducing the self - weight of the structure. The steel bridge deck is convenient for engineering manufacturing and has high construction efficiency. However, the orthotropic steel deck has a complex structure and a large number of welds. Initial defects are inevitably generated during welding or cutting. At the same time, there are large residual stresses in the welds and heat - affected zones. The geometric mutations and geometric discontinuities of the structural details will produce large stress concentration effects. Under the repeated action of wheel loads on the orthotropic steel bridge deck, the microscopic initial defects at the welds will gradually expand in the areas with large stress concentration effects, gradually forming macroscopic cracks visible to the naked eye. Under the action of large traffic volume and heavy trucks, the cracks will further expand and even fracture, triggering structural safety accidents. Secondly, the asphalt pavement layer of the steel bridge deck directly bears the wheel load, with complex forces and large local deformations. During the designed service life, the problem of damage to the steel bridge deck pavement layer is common. Content of the Utility Model

[0003] The purpose of the utility model is to provide a corrugated steel bottom plate - T - shaped steel rib - UHPC composite bridge deck, which improves the stiffness, crack resistance and flexural bearing capacity of the steel bridge deck, reduces the stress levels of the steel bridge deck and the pavement layer, and reduces the risks of diseases such as fatigue cracking of the steel bridge deck and damage to the pavement layer. The technical solutions adopted to achieve the above - mentioned purpose are as follows:

[0004] A corrugated steel bottom plate - T - shaped steel rib - UHPC composite bridge deck includes a corrugated steel bottom plate. The crests and troughs of the corrugated steel bottom plate are arranged alternately in the transverse direction of the bridge deck, and the crests and troughs of the corrugated steel bottom plate extend in the longitudinal direction of the bridge deck. A longitudinal T - shaped steel rib is fixed in each trough of the corrugated steel bottom plate. A plurality of steel bar through - holes are evenly distributed along the longitudinal direction at the top of the web of the T - shaped steel rib. The positions of the steel bar through - holes of each longitudinal T - shaped steel rib correspond one by one in the transverse direction. A transverse steel bar penetrates between the longitudinal T - shaped steel ribs, and a plurality of longitudinal steel bars are evenly distributed on the transverse steel bar, thus forming a steel bar mesh. An ultra - high - performance concrete filling layer is poured in the space formed by the corrugated steel bottom plate, the T - shaped steel rib and the steel bar mesh.

[0005] Preferably, the transverse steel bar is located above the longitudinal steel bar, and the intersection of the transverse steel bar and the longitudinal steel bar is connected by wire tying.

[0006] Preferably, a plurality of headed stud bolts arranged in an array are provided on the wave crest of the corrugated steel base plate.

[0007] Preferably, formwork extending upward is provided on both lateral sides of the corrugated steel base plate in the transverse direction, and the height of the formwork is 40 mm to 60 mm.

[0008] Preferably, the bottom of the longitudinal T-shaped steel rib plate is connected to the wave trough of the corrugated steel base plate by welding.

[0009] Preferably, the height of the headed stud bolt after welding is 35 mm.

[0010] (1) The utility model greatly enhances the bending stiffness and structural stability of the bridge deck steel skeleton during the construction process by erecting a longitudinal T-shaped steel rib plate on the corrugated steel base plate.

[0011] (2) After pouring the ultra-high performance concrete filling layer, it is firmly connected to the ultra-high performance concrete filling layer as a whole through the corrugated steel base plate, longitudinal T-shaped steel rib plate, steel mesh structure, and headed stud bolts.

[0012] (3) A wearing layer can also be poured on the ultra-high performance concrete filling layer, with better bonding between the two materials, convenient construction, and lower cost.

[0013] (4) The utility model improves problems such as fatigue cracking of orthotropic steel bridge decks, damage to asphalt paving layers on steel bridge decks, and complex and slow construction of steel-UHPC composite bridge decks. Description of the Drawings

[0014] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 is a structural schematic diagram of the longitudinal T-shaped steel rib plate;

[0016] Figure 3 is Figure 2 the left view of Detailed Embodiments

[0017] The following further describes the utility model with reference to the drawings.

[0018] As Figure 1 、 Figure 2 and Figure 3As shown in the figure, the utility model includes a corrugated steel bottom plate 10. The wave crests 8 and wave troughs 9 of the corrugated steel bottom plate 10 are arranged alternately in sequence in the transverse direction of the bridge deck. The wave crests 8 and wave troughs 9 of the corrugated steel bottom plate 10 extend in the longitudinal direction of the bridge deck. A longitudinal T-shaped steel rib plate 4 is fixed in each wave trough 9 of the corrugated steel bottom plate 10. The bottom of the longitudinal T-shaped steel rib plate 4 is welded to the wave trough 9 of the corrugated steel bottom plate 10. A plurality of steel bar through holes 11 are evenly distributed along the longitudinal direction at the top of the web 7 of the T-shaped steel rib plate 4. The positions of the steel bar through holes 11 of each longitudinal T-shaped steel rib plate 4 correspond to each other one by one in the transverse direction. A transverse steel bar 5 penetrates between the longitudinal T-shaped steel rib plates 4. A plurality of longitudinal steel bars 6 are evenly distributed on the transverse steel bar 5, thus forming a steel bar mesh. A ultra-high performance concrete filling layer 2 is poured in the space formed by the corrugated steel bottom plate 10, the T-shaped steel rib plate 4 and the steel bar mesh.

[0019] The intersection of the transverse steel bar 5 and the longitudinal steel bar 6 is connected by wire tying. In terms of the positional relationship between the transverse steel bar 5 and the longitudinal steel bar 6, preferably, the transverse steel bar 5 is arranged above the longitudinal steel bar 6. Since the crack resistance performance of the bridge deck structure is mainly controlled by the transverse crack resistance performance, arranging the transverse steel bar 5 above the longitudinal steel bar 6 can better exert the mechanical properties of the transverse steel bar 5 and improve the transverse crack resistance performance of the bridge deck structure.

[0020] A plurality of headed stud bolts 3 arranged in an array are provided on the wave crest 8 of the corrugated steel bottom plate 10. The height of the headed stud bolts 3 after welding is 35 mm, so as to increase the connection strength between the corrugated steel bottom plate 10 and the ultra-high performance concrete filling layer 2.

[0021] Pouring templates 1 extending upward are provided on the two lateral sides in the transverse direction of the corrugated steel bottom plate 10. The height of the pouring templates 1 is 40 mm to 60 mm.

[0022] When assembling and constructing the utility model, first, the prefabricated corrugated steel bottom plate 10 is erected at the construction position, and then the longitudinal T-shaped steel rib plates 40 are successively hoisted to the installation positions in the wave troughs 9 of the corrugated steel bottom plate 10 and welded and fixed; then, a plurality of headed stud bolts 3 arranged in an array are provided on the wave crest 8 of the corrugated steel bottom plate 10, and then the transverse steel bar 5 and the longitudinal steel bar 6 are arranged. Finally, a ultra-high performance concrete filling layer 2 is poured in the space formed by the corrugated steel bottom plate 10, the T-shaped steel rib plate 4 and the steel bar mesh.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A corrugated steel bottom plate-T-shaped steel rib plate-UHPC combined bridge deck, characterized in that: It comprises a corrugated steel base plate, wherein the crests and troughs of the corrugated steel base plate are alternately arranged in sequence in the transverse direction of the bridge deck, and the crests and troughs of the corrugated steel base plate are extended in the longitudinal direction of the bridge deck, a longitudinal T-shaped steel rib is fixed in each trough of the corrugated steel base plate, a plurality of steel bar through holes are evenly distributed longitudinally on the top of the web of the T-shaped steel rib, the positions of the steel bar through holes of each longitudinal T-shaped steel rib correspond one by one in the transverse direction, transverse steel bars penetrate between the longitudinal T-shaped steel ribs, a plurality of longitudinal steel bars are evenly distributed on the transverse steel bars, thereby forming a steel mesh, and an ultra-high performance concrete filling layer is cast in the space formed by the corrugated steel base plate, the T-shaped steel rib and the steel mesh.

2. The corrugated steel bottom plate-T-shaped steel rib plate-UHPC combined bridge deck according to claim 1 is characterized in that: The transverse reinforcement is located above the longitudinal reinforcement, and the intersection of the transverse reinforcement and the longitudinal reinforcement is connected by steel wire plate.

3. The corrugated steel bottom plate-T-shaped steel rib plate-UHPC combined bridge deck according to claim 1 is characterized in that: A plurality of headed studs arranged in an array are provided on the wave crests of the corrugated steel bottom plate.

4. The corrugated steel bottom plate-T-shaped steel rib plate-UHPC combined bridge deck according to claim 1 is characterized in that: On both sides of the corrugated steel bottom plate, there are upwardly extending casting templates, and the height of the casting templates is 40mm to 60mm.

5. The corrugated steel bottom plate-T-shaped steel rib plate-UHPC combined bridge deck according to any one of claims 1 to 4, characterized in that: The bottom of the longitudinal T-shaped steel rib is welded to the trough of the corrugated steel bottom plate.

6. The corrugated steel bottom plate-T-shaped steel rib plate-UHPC combined bridge deck according to claim 3 is characterized in that: The height of the headed bolt after welding is 35 mm.

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