High-strength reinforced concrete bridge deck

Abstract

The utility model discloses a high-strength steel-concrete bridge deck which is used for solving the problem that the ratio of dead weight to strength of an existing high-strength steel-concrete bridge deck is large. An upper bridge deck of the high-strength steel-concrete bridge deck is of a flat structure, a reinforcing mesh is arranged in the upper bridge deck, a lower bridge deck is of a concave-convex structure composed of a plurality of ribs arranged in the bridge direction, the two ends of the lower bridge deck are provided with locally-flat installation faces, and the installation faces are installed on a bridge abutment or a pier body or a frame beam through rubber supports. Each rib is internally provided with profile steel which is of an inverted T-shaped structure and composed of a wing plate and a web plate, the two ends of the profile steel are located in the bridge floor where the installation face is located, the ribs are concrete wrapping layers internally embedded with the wing plates, and the ribs are in an inverted T shape. The structure is not prone to deformation or small in deformation, the structural system is good, durability is high, stability is high, and the strength of the concrete slab is good.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a high-strength steel-concrete bridge deck. Background Art

[0002] High-strength steel-concrete bridge deck refers to a bridge structure formed by prefabricated combination of steel and reinforced concrete. In existing high-strength steel-concrete bridge deck structures, steel generally uses I-beams as tensile components, and the upper wing of the I-beam is embedded with reinforced concrete to form a whole. The lower wing of the I-beam is exposed and anti-corrosion and fire-retardant paint is applied to form a coating layer. In the high-strength steel-concrete bridge deck structure of this structure, the advantages of steel in tensile bearing and reinforced concrete in compressive bearing can be fully utilized.

[0003] In order to increase the strength of the bridge deck, it is usually achieved by increasing the specifications of the I-beams. Specifically, large-sized I-beams are not conducive to reducing the deadweight of the bridge deck.

[0004] Furthermore, the use of I-beams in the prior art is difficult in terms of fire prevention and corrosion prevention, especially in bridge projects in water-related areas, where I-beams are often corroded. Summary of the invention

[0005] In order to solve the deficiencies of the prior art, the utility model provides a high-strength steel-concrete bridge deck, which is used to solve the problem of large deadweight and strength ratio in the existing high-strength steel-concrete bridge deck.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A high-strength steel-concrete bridge deck, wherein the upper deck of the high-strength steel-concrete bridge deck is a flat structure with a steel mesh arranged inside, and the lower deck is a concave-convex structure composed of multiple ribs arranged along the bridge direction, and there are locally flat installation surfaces at both ends of the lower deck, which are installed with the abutments or piers and beams through rubber bearings, and are characterized in that a steel section with an inverted T-shaped structure composed of a wing plate and a web is arranged in each rib, and both ends of the steel section are located in the bridge deck where the installation surface is located, and the rib is a concrete covering layer with a wing plate embedded inside, and the rib is an inverted T-shape.

[0008] Furthermore, the reinforced concrete is ultra-high performance concrete embedded with galvanized steel fibers.

[0009] Furthermore, on the lower surface of the wing panel, a carbon fiber cloth or a carbon fiber plate with tensile stress is previously attached to an adhesive to enhance or strengthen the tensile performance of the steel section.

[0010] The web is provided with circular holes, and the circular hole design can reduce the deadweight of the steel section and maintain the best bite degree with the reinforced concrete.

[0011] Furthermore, a barb structure is provided on the web, and the barb structure is opposite to the direction of the tensile force.

[0012] Furthermore, galvanized steel pipes are arranged at both ends of the bridge deck, which are perpendicular to the above-mentioned steel sections, arranged along the transverse direction of the bridge, and pass through the webs on the above-mentioned T-shaped steel sections to form a steel cable channel.

[0013] Furthermore, the coating layer has a thickness of not less than 5 cm.

[0014] Furthermore, there is a rib plate below the wing plate, and the rib plate, the wing plate and the web plate form a cross-structured cross section.

[0015] The belly plate is changed into a fish belly plate, that is, a fish belly structure with a downward curvature in the middle part.

[0016] Furthermore, the steel mesh is provided with double layers.

[0017] Carbon fiber cloth is pasted on the lower wing plate of the steel section, which reduces the cost of the steel section without reducing the tensile strength, thereby improving the rigidity, durability and safety of the main beam.

[0018] The beneficial effects of the utility model are:

[0019] In this technology, since the medium-sized steel of the high-strength steel-concrete bridge deck is partially wrapped, and barbed structures are arranged on some webs, as well as the use of ultra-high concrete mixed with steel fibers, the overall tensile stiffness and bending stiffness of the high-strength steel-concrete bridge deck are effectively enhanced, making the structure less likely to deform or less deformable, with a good structural system, high durability and high stability, and better strength of the concrete slab.

[0020] At the same time, the bridge deck can be designed to be thinner and lighter, with a higher bearing capacity, which is of positive significance for reducing the overall weight of high-strength steel-concrete bridge decks. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional image of the high-strength steel-concrete bridge deck.

[0022] Figure 2 This is a three-dimensional image of the high-strength steel-concrete bridge deck.

[0023] Figure 3 It is a display of high-strength steel-concrete bridge deck structure.

[0024] Figure 4 for Figure 3 A partial enlarged view of point A in the middle.

[0025] Figure 5 This is a transverse cross-sectional view of the bridge deck.

[0026] Figure 6For combined use.

[0027] Figure 7 It is a three-dimensional diagram of the second embodiment.

[0028] Figure 8 It is a side view of the second embodiment.

[0029] Fig. 9 This is a structural display of Example 3.

[0030] In the figure:

[0031] 01 upper bridge deck, 02 lower bridge deck, 03 installation surface, 04 channel, 05 steel cable,

[0032] 10 reinforced concrete, 11 covering layer, 12 steel mesh, 13 galvanized steel pipe,

[0033] 20T steel, 21 flange, 22 web, 221 round hole, 222 barb structure, 23 rib. DETAILED DESCRIPTION

[0034] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms “upper”, “lower”, etc. are defined based on the direction of gravity.

[0035] The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, such as a rivet connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Relational terms such as "first" and "second" and the like are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0037] A high-strength steel-concrete bridge deck is introduced. The bridge deck structure is mainly composed of reinforced concrete 10 and T-steel 20, wherein the steel is an inverted T-steel and carbon fiber cloth is pasted on the lower wing plate of the T-steel to reduce the cost of the steel without reducing the tensile strength, thereby improving the main beam stiffness, durability and safety.

[0038] Embodiment 1

[0039] See also Figure 1 and Figure 2As shown, the renderings of the high-strength steel-concrete bridge deck from the upper and lower perspectives are given as examples. It can be seen from the rendering that the upper deck 01 of the bridge deck is a flat structure, and the lower deck 02 is a concave-convex structure composed of ribs, and the ribs are arranged along the longitudinal direction of the bridge. In addition, a partially flat installation surface 03 is formed at both ends of the lower deck, and the installation surface 03 is installed with the abutment or pier body and the frame beam through a rubber bearing, and is an installation functional part.

[0040] Also, from the side, the tensioning cable channel 04 is arranged transversely, and the tensioning steel cable 05 is used to organically tighten and lock the multiple bridge decks arranged in parallel along the transverse direction, forming a bridge deck with a wide amplitude, referring to Figure 6 , and finally lay asphalt pavement on it.

[0041] In this embodiment, the concrete is preferably ultra-high performance concrete, preferably ultra-high performance concrete mixed with galvanized steel fibers. By using the ultra-high performance concrete, the self-weight of the bridge deck can be reduced while ensuring the strength.

[0042] refer to Figures 3 to 5 The T-shaped steel 20 is formed by welding a steel plate with a thickness of 3-8 mm, wherein the wing plate 21 is located below the bridge deck, and the web plate 22 is located above the wing plate, forming an inverted T-shaped structure. A circular hole 221 is opened on the web plate 22. The circular hole design can reduce the deadweight of the steel and maintain the best bite between the steel bar and the concrete.

[0043] The web of the T-shaped steel 20 is partially located inside the reinforced concrete 10 and partially outside the reinforced concrete. The exposed web and the entire wing are wrapped with ultra-high performance concrete to form a coating layer 11 with a thickness of not less than 5 cm. The reinforced concrete 10 is preferably ultra-high performance concrete mixed with galvanized steel fibers. The existence of the coating layer 11 can form a protective layer on the surface of the steel section, which has the effect of anti-corrosion and fire prevention. Second, the ultra-high performance concrete can improve the overall strength of the bridge deck.

[0044] Furthermore, on the lower surface of the wing panel 21, a carbon fiber cloth or a carbon fiber plate having tensile stress is previously attached to an adhesive to enhance or strengthen the tensile performance of the steel section.

[0045] The density of the T-steels mentioned above should be appropriately increased, for example, the gap between two adjacent steel sections should not be greater than 600mm.

[0046] Furthermore, instead of a circular opening on the web 22, a barb structure 222 is added. Fig. 9Specifically, a plurality of triangular or rectangular barb structures are formed on the web by stamping, and the barb structures are opposite to the direction of the tensile force. Specifically, barb structures with opposite directions are arranged at both ends of the bridge deck along the bridge direction. Fig. 9 This barb structure makes the bonding strength between the web and concrete stronger, which is beneficial to improving the bonding strength between steel and concrete. In other words, the direction of the barb is to set the barb in the direction of both ends of the bridge deck with the center line as the boundary.

[0047] Furthermore, the barb structure can also be arranged in an irregular direction, that is, without specifying a specific direction, so that it is arranged in a disorderly manner on the web. The arrangement of the barb structure ensures the bonding strength between the steel and the concrete, especially improves the shear resistance at the lap joint between the two.

[0048] A steel mesh 12 is arranged in the concrete structure above the steel section, and the steel mesh and the concrete form a reinforced concrete structure.

[0049] Furthermore, galvanized steel pipes 13 are provided at both ends of the bridge deck. The galvanized steel pipes are perpendicular to the above-mentioned steel sections, arranged along the transverse direction of the bridge, and pass through the webs on the above-mentioned T-steel to form cable channels, also called tensioning channels, which are used for tensioning multiple bridge panels after construction and to prevent large and unstable gaps between bridge panels, which is of positive significance for ensuring construction quality.

[0050] Through the implementation of the above measures, reinforced concrete, steel sections and carbon fiber cloth form a stable whole. The integrated structure improves the bending and tensile stiffness along the bridge direction. In addition, the use of galvanized steel fibers makes the bridge deck bending moment zone less likely to crack.

[0051] Since a covering layer 11 of not less than 5 cm is provided on the lower half of the steel section, the upper ultra-high performance concrete of the high-strength steel-concrete bridge deck can be designed to be thinner.

[0052] Embodiment 2

[0053] See also Figure 7 As shown, further, a rib plate 23 can be provided below the wing plate, and a cross-structured section is formed by the rib plate, the wing plate and the web plate, wherein the height of the rib plate is about one tenth of the height of the web plate, which can improve the tensile and compressive properties of this part and enhance the overall stiffness of the bridge deck. The steel section in this embodiment has certain optimizations compared with the first embodiment. In addition, the web plate in the steel section is changed to a fish belly plate, that is, a fish belly structure with a downward arch in the middle part. This structure has better compressive properties.

[0054] Furthermore, the steel mesh 12 can be provided in a single layer or a double layer, and whether to provide a single layer or a double layer is determined according to the span of the bridge.

[0055] When the steel mesh is a double-layer design, the lower steel mesh can be welded to the upper edge of the steel web. This structure has a positive significance for the position stability of the steel during concrete pouring.

[0056] The embodiments described above are merely descriptions of preferred implementations of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements to the present invention by relevant technical personnel in the field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A high-strength steel-concrete bridge deck, wherein the upper deck of the high-strength steel-concrete bridge deck is a flat structure with a steel mesh arranged inside, and the lower deck is a concave-convex structure composed of a plurality of ribs arranged along the bridge direction, and there are partially flat mounting surfaces at both ends of the lower deck, which are mounted on the abutment or pier body and beam through rubber bearings, and are characterized in that: Each rib is provided with a steel section of an inverted T-shaped structure consisting of a wing plate and a web plate, and both ends of the steel section are located in the bridge deck where the installation surface is located, and the rib is a concrete covering layer with a wing plate embedded inside, and the rib is an inverted T-shape.

2. The high-strength steel-concrete bridge deck according to claim 1, characterized in that: A carbon fiber cloth or a carbon fiber plate is attached to the lower surface of the wing panel.

3. The high-strength steel-concrete bridge deck according to claim 1, characterized in that: The web is provided with a circular hole.

4. The high-strength steel-concrete bridge deck according to claim 1, characterized in that: The web is provided with a barb structure, and the barb structure is opposite to the direction of the tensile force.

5. The high-strength steel-concrete bridge deck according to claim 1, characterized in that: A rib is provided below the wing, and the rib, the wing and the web form a cross-structured cross section.

6. The high-strength steel-concrete bridge deck according to claim 1, characterized in that: The belly plate is a fish belly plate.

7. The high-strength steel-concrete bridge deck according to claim 1, characterized in that: The steel mesh is provided with double layers.

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