Light and thin assembly type fiber concrete prefabricated ribbed plate

Abstract

The utility model relates to the field of assembly type fiber concrete prefabricated bridge deck slabs, and discloses a light and thin assembly type fiber concrete prefabricated ribbed slab which comprises a bottom plate and a plurality of slab ribs, the slab ribs are located on the inner end face of an opening of the bottom plate, and the slab ribs are evenly distributed on the bottom plate. The bottom plate and the plate ribs are integrally formed and manufactured, and the bottom plate and the plate ribs are prepared from reinforcing steel bars and fiber concrete. According to the scheme, by additionally arranging the concrete rib plates, the thickness of the deck of the bridge deck can be reduced, the overall weight of the bridge deck is reduced, and meanwhile high rigidity and bearing capacity are kept; the ribs are only arranged at the part which needs to enhance the rigidity and the bearing capacity, and the rest part is kept in a thinner structure, so that materials can be more effectively utilized, the use of concrete and steel bars is reduced, and the construction cost is reduced; by means of the prefabricated ribbed plate, construction and installation of a bridge deck slab of a bridge can be conveniently and rapidly completed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of assembly type fiber reinforced concrete prefabricated bridge deck, in particular to a light and thin assembly type fiber reinforced concrete prefabricated ribbed slab. BACKGROUND

[0002] Bridge deck, bridge deck is the transverse load-bearing member of the superstructure of the bridge directly bearing the traffic load such as vehicle and pedestrian, usually located on the top of the main beam (such as box girder, T beam, I beam etc.), constitutes the main structure part of the bridge deck.

[0003] In the design of long-span bridge, the bridge deck will be deformed greatly under the action of load, which may cause cracks in the bridge deck, unstable structure or affect the use function, in order to ensure sufficient bearing capacity and stiffness, the traditional design usually increases the thickness of the bridge deck to improve the stiffness and bearing capacity, but the increase of the thickness of the bridge deck will directly lead to the increase of the self weight of the bridge deck, and may additionally need to reinforce the foundation and pier, which leads to the increase of the burden of the whole structure system, and also increases the engineering cost and construction difficulty. UTILITY MODEL CONTENT

[0004] The utility model intends to provide a light and thin assembly type fiber reinforced concrete prefabricated ribbed slab to solve the problem of large thickness of the traditional bridge deck, which leads to large self weight of the bridge deck.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a light and thin assembly type fiber reinforced concrete prefabricated ribbed slab, comprising a bottom plate and a plate rib for supporting the bottom plate, the plate rib is located on the open end face of the bottom plate, the plate rib is provided with a plurality of plate ribs, the plate ribs are uniformly distributed on the bottom plate, the bottom plate and the plate rib are integrally formed, the bottom plate and the plate rib are prepared by steel bars and fiber reinforced concrete, the number of steel bars in the lower part of the bottom plate is greater than that in the upper part, the number of steel bars in the lower part of the plate rib is greater than that in the upper part, the length of the plate rib is matched with the length of the bottom plate, the steel bars in the bottom plate are fixedly connected with the steel bars in the plate rib, and the edge of the bottom plate is provided with a lap joint steel bar.

[0006] The principle of the scheme is that first, a model is made by using PVC plate or steel plate in the prefabrication factory, the steel bars are bound, the fiber reinforced concrete is poured into the model, and the production of the bottom plate and the plate rib is completed; then the steel bars between the adjacent bottom plates are overlapped at the installation site, the fiber reinforced concrete is poured in the gap between the bottom plates, and the rivets are laid at the bottom of the gap to connect the steel beams, so as to fix the bridge deck on the corresponding steel beams of the bridge.

[0007] The scheme has the following advantages: the thickness of the deck plate can be reduced by adding the concrete ribbed plate, the overall weight of the deck plate is reduced, and the rigidity and bearing capacity are maintained; the bending rigidity of the deck plate is enhanced by arranging the rib strips on the deck plate, the deflection and deformation of the deck plate are significantly reduced, the deck plate can maintain good flatness and stability under a large load, the structure of the deck plate is optimized, the rib strips are arranged only in the parts that need to be enhanced in rigidity and bearing capacity, the rest of the structure is thin, the materials can be used more effectively, the use of concrete and steel bars is reduced, and the construction cost is reduced; the prefabricated ribbed plate facilitates the construction and installation of the deck plate of the bridge; under the action of the load, the top of the deck plate is compressed, and the bottom of the deck plate bears the pressure; when the deck plate is bent, the area with large stress is usually located at the bottom of the deck plate; the resistance to pressure is increased by adding the bottom steel bars, the additional strength is provided, the cracks are more difficult to form, and the cracks caused by insufficient stress can be effectively avoided.

[0008] Preferably, the steel bars of the bottom plate include transverse steel bars and longitudinal steel bars, and the longitudinal steel bars and the transverse steel bars are both U-shaped. The U-shaped steel bars work together with other steel bars to effectively prevent the cracks from expanding at the bottom, and the crack resistance and bending resistance of the deck plate are enhanced; the arrangement of the U-shaped steel bars can prevent the displacement of the steel bars in the deck plate during the pouring and curing of the concrete, maintain the relative positions of the steel bars, and thus ensure the design effect of the steel bars.

[0009] Preferably, the longitudinal steel bars are smoothly transitioned at the bending portions at the two ends. By processing the bending portions at the two ends into a smooth shape, the stress concentration can be effectively reduced, the risk of fracture is reduced, and the overall tensile property of the longitudinal steel bars is improved.

[0010] Preferably, the bottom portions at the two ends of the longitudinal steel bars and the bottom portions at the two ends of the transverse steel bars are hook-shaped. The hook-shaped design of the two ends of the longitudinal steel bars and the transverse steel bars can effectively increase the contact area between the steel bars and the concrete, and thus improve the adhesion between the two; the sliding of the steel bars under the action of the load is prevented, the anchoring length of the steel bars is increased, and thus the overall bearing capacity of the structure is improved; the stress distribution is improved, the local stress concentration is reduced, the anti-seismic and anti-shear properties are enhanced, the occurrence of cracks is reduced, the construction precision and efficiency are improved, and the safety and long-term stability of the structure are ensured.

[0011] Preferably, a first bottom reinforcing bar is arranged in the hook-shaped portion of the transverse steel bar. By the design of the bottom reinforcing bar, the bending deformation resistance of the deck plate is increased, and thus the bearing capacity of the deck plate is improved, and the deck plate is ensured not to be damaged due to excessive load during use.

[0012] Preferably, the first bottom reinforcing bar penetrates the hook-shaped portion of the transverse steel bar in the axial direction, and the diameter of the first bottom reinforcing bar is matched with the diameter of the hook-shaped portion of the transverse steel bar.

[0013] Preferably, the reinforcing bars of the plate rib include U-shaped reinforcing bars, and the open end of the U-shaped reinforcing bars is fixedly connected to the transverse reinforcing bars.

[0014] Preferably, a second bottom reinforcing bar is laid inside the U-shaped steel bar, and the second bottom reinforcing bar passes axially through the U-shaped steel bar. This bottom reinforcing bar design increases the bridge deck's resistance to bending deformation, thereby improving the bridge deck's load-bearing capacity and ensuring that the bridge deck will not be damaged by excessive loads during use.

[0015] Preferably, the lapped reinforcing bars at both ends of the bottom plate are staggered vertically. This staggering of adjacent bridge deck reinforcing bars effectively prevents shear failure caused by improper joint placement, improving the shear resistance and overall load-bearing capacity of the bridge deck. The staggered arrangement of the reinforcing bar joints allows for a more even distribution of stress within the bridge deck, reducing localized stress concentration and improving the stability of the bridge deck. The staggered design also better utilizes the tensile strength of the reinforcing bars, ensuring the overall stability of the bridge deck under stress and reducing the likelihood of localized failure or premature damage. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0017] Figure 2 This is an embodiment of the present utility model. Figure 1 A cross-sectional view along the AA direction.

[0018] Figure 3 This is an embodiment of the present utility model. Figure 1 A cross-sectional view along the BB direction.

[0019] Figure 4 This is an embodiment of the present utility model. Figure 3 A partial schematic diagram. Detailed Implementation

[0020] The following detailed description illustrates the specific implementation method:

[0021] The reference numerals in the accompanying drawings include: 1. base plate; 2. plate rib; 3. transverse reinforcement; 4. longitudinal reinforcement; 5. U-shaped reinforcement; 6. first bottom reinforcement; 7. second bottom reinforcement; 8. lapped reinforcement.

[0022] Example:

[0023] A lightweight, prefabricated fiber-reinforced concrete ribbed slab, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes a base plate 1 and plate ribs 2.

[0024] The plate ribs 2 are arranged on the end face of the opening of the bottom plate 1, and a plurality of plate ribs 2 are arranged on the bottom plate 1, and the specific number is adjusted according to the size of the required bridge deck slab. The thickness of the bridge deck slab can be reduced by increasing the concrete ribbed plate, the overall weight of the bridge deck slab is reduced, and the rigidity and carrying capacity are maintained; the bending rigidity of the bridge deck slab can be enhanced, the deflection and deformation of the bridge deck slab can be significantly reduced, and the bridge deck slab can maintain good flatness and stability under a large load; only the ribs in the part where the rigidity and carrying capacity need to be enhanced are arranged, and the remaining part maintains a thin structure, which can more effectively utilize the material, reduce the use of concrete and steel bars, and thus reduce the construction cost.

[0025] The bottom plate 1 and the plate rib 2 are integrally formed, and the bottom plate 1 and the plate rib 2 are made of steel bars and fiber concrete. A model is made of a PVC plate or a steel plate in a prefabrication factory, the steel bars are bound, and the fiber concrete is poured into the model to complete the manufacture of the bottom plate 1 and the plate rib 2. The installation site is installed. The prefabricated ribbed plate can facilitate and quickly complete the construction and installation of the bridge deck slab of the bridge. In the embodiment, concrete with a concrete grade of C80 or above is used. In the embodiment, the concrete is the existing concrete, and the concrete ratio is not adjusted in the scheme.

[0026] The number of the lower steel bars of the bottom plate 1 is greater than the number of the upper steel bars. Under the action of the load, the top of the bridge deck slab is compressed, and the bottom bears the pressure. When the bridge deck slab is bent, the area with greater stress is usually located at the bottom of the bridge deck slab. By increasing the bottom steel bars to increase the resistance to pressure, additional strength is provided, making it more difficult for cracks to form, and cracks caused by insufficient stress can be effectively avoided.

[0027] The edge of the bottom plate 1 is provided with a lap steel bar 8, and the lap steel bars 8 at both ends of the bottom plate 1 are arranged in an up-down staggered manner. The lap steel bars 8 of adjacent bottom plates 1 are connected in an up-down staggered manner, then the gap between the bottom plates 1 is poured with fiber concrete, and a rivet is laid at the bottom of the gap to connect the steel beam, and then the bridge deck slab is fixed on the corresponding steel beam of the bridge. The up-down staggered arrangement of the lap steel bars 8 makes the steel bars of adjacent bridge deck slabs staggered, and the staggered arrangement of the steel bar joints can effectively prevent shear failure caused by unreasonable joint position, improve the shear resistance and overall carrying capacity of the bridge deck slab; the up-down staggered arrangement of the steel bar joints can make the stress more uniformly distributed in the bridge deck slab, thereby reducing local stress concentration and improving the stability of the bridge deck slab; the staggered design can better utilize the tensile properties of the steel bars to ensure the overall stability of the bridge deck slab under stress and prevent local failure or premature failure. The lap steel bars 8 are welded and fixed with the transverse steel bars 3.

[0028] The steel bars of the bottom plate 1 include transverse steel bars 3 and longitudinal steel bars 4, and the longitudinal steel bars 4 and the transverse steel bars 3 are both U-shaped. The U-shaped steel bars 5 work together with other steel bars to effectively prevent cracks from expanding at the bottom, thereby enhancing the crack resistance and bending resistance of the bridge deck slab; the arrangement of the U-shaped steel bars 5 can prevent the displacement of the steel bars in the bridge deck slab during the pouring and curing of the concrete, thereby maintaining the relative positions of the steel bars and ensuring the design effect of the steel bars.

[0029] The bottom of the longitudinal steel bars 4 at both ends and the bottom of the transverse steel bars 3 at both ends are hook-shaped, and the hook-shaped design of the longitudinal steel bars 4 and the transverse steel bars 3 at both ends can effectively increase the contact area between the steel bars and the concrete, thereby improving the bonding force therebetween; prevent the steel bars from slipping under load, increase the anchoring length of the steel bars, thereby improve the overall carrying capacity of the structure; can also improve the stress distribution, reduce local stress concentration, enhance the anti-seismic and anti-shear performance, reduce the occurrence of cracks, improve the construction precision and efficiency, and ensure the safety and long-term stability of the structure.

[0030] The first bottom reinforcing bars 6 are arranged in the hook-shaped part of the transverse steel bars 3. Through the design of the bottom reinforcing bars, the bending deformation resistance of the bridge deck slab is increased, thereby improving the carrying capacity of the bridge deck slab and ensuring that the bridge deck slab will not be damaged due to excessive load during use. The first bottom reinforcing bars 6 axially pass through the hook-shaped part of the transverse steel bars 3, and the diameter of the first bottom reinforcing bars 6 is matched with the diameter of the hook-shaped part of the longitudinal steel bars 4. Similarly, bottom reinforcing bars can also be arranged in the hook-shaped part of the longitudinal steel bars 4 to increase the bending deformation resistance of the bridge deck slab, thereby improving the carrying capacity of the bridge deck slab and ensuring that the bridge deck slab will not be damaged due to excessive load during use.

[0031] The bending part of the longitudinal steel bars 4 at both ends is smoothly transitioned. By processing the bending angle part into a smooth shape, the stress concentration can be effectively reduced, the risk of fracture can be reduced, and the overall tensile performance of the longitudinal steel bars 4 can be improved.

[0032] The number of lower steel bars of the plate rib 2 is greater than that of the upper steel bars of the plate rib 2, and the length of the plate rib 2 is matched with the length of the bottom plate 1. The steel bars of the plate rib 2 include the U-shaped steel bars 5, and the opening end of the U-shaped steel bars 5 is fixedly connected with the longitudinal steel bars 4. The second bottom reinforcing bars 7 are arranged in the U-shaped steel bars 5, and the second bottom reinforcing bars 7 axially pass through the U-shaped steel bars 5. Through the design of the bottom reinforcing bars, the bending deformation resistance of the bridge deck slab is increased, thereby improving the carrying capacity of the bridge deck slab and ensuring that the bridge deck slab will not be damaged due to excessive load during use.

[0033] The scheme uses the ribbed slab as the bridge deck slab, the horizontal ribs are arranged under the flat slab, the component is light and thin, the size is large, hoisting is carried out after precasting and curing in the precasting yard to reach the strength, installation is convenient, construction speed is fast, and bearing capacity is large; materials can be more effectively used, the use of concrete and steel bars is reduced, thereby reducing construction cost; the thickness of the bridge deck slab surface can be reduced, the overall weight of the bridge deck slab is reduced, and meanwhile, higher rigidity and bearing capacity are maintained.

[0034] The above is only the embodiment of the present application, and the well-known specific technical solutions and / or common knowledge of characteristics in the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the technical scheme of the present application, a number of modifications and improvements can be made, in the present application, unless otherwise specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The protection scope claimed in the present application should be subject to the content of the claims, and the specific embodiments and the like in the specification can be used to explain the content of the claims.

Claims

1. A thin and light fabricated fiber reinforced concrete precast ribbed slab, characterized by, The application relates to a bottom plate and a plate rib for supporting the bottom plate, the plate rib is arranged on the end face of the opening of the bottom plate, a plurality of plate ribs are arranged on the bottom plate, the plate ribs are uniformly distributed on the bottom plate, the bottom plate and the plate rib are integrally formed, the bottom plate and the plate rib are made of reinforced concrete, the number of the lower reinforcing bars of the bottom plate is greater than that of the upper reinforcing bars, the number of the lower reinforcing bars of the plate rib is greater than that of the upper reinforcing bars, the length of the plate rib is matched with the length of the bottom plate, the reinforcing bars in the bottom plate are fixedly connected with the reinforcing bars in the plate rib, and the edge of the bottom plate is provided with overlapping reinforcing bars.

2. The thin and light fabricated fiber reinforced concrete precast ribbed slab according to claim 1, characterized in that: The reinforcing bars in the bottom plate include transverse reinforcing bars and longitudinal reinforcing bars, and the longitudinal reinforcing bars and the transverse reinforcing bars are both U-shaped.

3. The thin and light fabricated fiber reinforced concrete precast ribbed slab as claimed in claim 2, wherein: The two ends of the longitudinal reinforcing bars are smoothly connected with the bottom part.

4. The thin and light fabricated fiber reinforced concrete precast ribbed slab as claimed in claim 2, wherein: The two ends of the longitudinal reinforcing bars are smoothly connected with the bottom part.

5. The thin and light fabricated fiber reinforced concrete precast ribbed slab as claimed in claim 4, wherein: The transverse reinforcing bars are provided with first bottom reinforcing bars in the hook-shaped part.

6. The thin and light fabricated fiber reinforced concrete precast ribbed slab as claimed in claim 5, wherein: The first bottom reinforcing bars pass through the hook-shaped part of the transverse reinforcing bars in the axial direction, and the diameter of the first bottom reinforcing bars is matched with the diameter of the hook-shaped part of the transverse reinforcing bars.

7. The thin and light fabricated fiber reinforced concrete precast ribbed slab as claimed in claim 2, wherein: The reinforcing bars of the plate rib include U-shaped reinforcing bars, and the opening end of the U-shaped reinforcing bars is fixedly connected with the transverse reinforcing bars.

8. The thin and light fabricated fiber reinforced concrete precast ribbed slab as claimed in claim 7, wherein: The U-shaped reinforcing bars are provided with second bottom reinforcing bars, and the second bottom reinforcing bars pass through the U-shaped reinforcing bars in the axial direction.

9. The thin and light fabricated fiber reinforced concrete precast ribbed slab as claimed in claim 1, wherein: The overlapping reinforcing bars at the two ends of the bottom plate are arranged in the up-down staggered mode.

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