Prefabricated multi-rib plate and combined system thereof

Abstract

The utility model relates to the technical field of constructional engineering, and provides a prefabricated multi-rib plate. The prefabricated multi-rib plate comprises a top plate, transverse ribs are arranged at the two ends of the bottom face of the top plate in the length direction, a plurality of longitudinal ribs parallel to the length direction of the top plate are arranged on the bottom face of the top plate, and the two ends of the longitudinal ribs intersect with the inner side faces of the transverse ribs. Connecting anti-shearing pieces are arranged at the two ends of one or more longitudinal ribs; one end of the connecting shear-resistant piece penetrates through the transverse rib and goes deep into the longitudinal rib, and the other end is exposed relative to the outer side surface of the transverse rib. The prefabricated multi-rib plate is simple in structure, high in bearing capacity, simple in plate connection and convenient to construct and install.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial buildings, belonging to the field of precast concrete assembled building engineering, and particularly relates to a precast multi-ribbed slab. Background Art

[0002] An industrial self-supporting floor slab generally refers to a precast concrete floor slab used in industrial buildings that can self-support without additional support structures (such as formwork or temporary supports). This type of floor slab does not require the construction of a complex support system, has a fast installation process, reduces the construction period, and is particularly suitable for projects such as large industrial factories and warehouses that require large-area floor slab laying.

[0003] The composite floor slab is a common application form of industrial self-supporting floor slabs. In current industrial assembled integral buildings, composite floor slabs generally use multi-ribbed slabs, steel bar truss floor supports, steel pipe truss composite slabs, etc. For multi-ribbed slabs, existing precast multi-ribbed slabs often have problems such as numerous accessory components, complex connection forms between slabs, and inconvenient construction and installation. Summary of the Utility Model

[0004] Aiming at the deficiencies of existing products, the utility model provides a new type of precast multi-ribbed slab with a simple structure, high load-bearing capacity, simple connection between slabs, and convenient construction and installation.

[0005] The precast multi-ribbed slab of the utility model includes a top plate. Transverse ribs are provided at both ends of the bottom surface of the top plate in the length direction. A plurality of longitudinal ribs parallel to the length direction of the top plate are provided on the bottom surface of the top plate. Longitudinal steel bars are arranged in the longitudinal ribs, and both ends of the longitudinal ribs intersect with the inner side surfaces of the transverse ribs. Connection shear-resistant members are provided at both ends of one or more longitudinal ribs; one end of the connection shear-resistant member passes through the transverse rib and is connected to the longitudinal steel bar, and the other end is exposed relative to the outer side surface of the transverse rib.

[0006] Optionally, connection shear-resistant members are provided at both ends of each longitudinal rib.

[0007] Optionally, the number of longitudinal ribs ≥ 3; the width of the longitudinal ribs ≥ 50 mm, and the height ≥ 200 mm.

[0008] Optionally, one end of the connection shear-resistant member passes through the transverse rib and is connected to the longitudinal steel bar through a U-shaped stirrup.

[0009] Optionally, shear-resistant members on the plate surface are provided on the top plate, or the plate surface of the top plate is treated by roughening.

[0010] Optionally, a two-way steel bar mesh is arranged in the top plate; tie bars are arranged in the longitudinal ribs, and the longitudinal steel bars are connected to the two-way steel bar mesh in the top plate through the tie bars.

[0011] Optionally, the width of the transverse rib ≥ 50 mm, and the height ≥ 200 mm.

[0012] Optionally, a transverse rib two-way steel bar mesh is provided inside the transverse rib, and the transverse rib two-way steel bar mesh is connected to the top plate two-way steel bar mesh.

[0013] Optionally, the thickness of the top plate ≥ 50 mm, the width ≥ 2400 mm, and the length ≥ 4000 mm.

[0014] Optionally, a transverse rib is provided at the mid-span in the length direction of the top plate.

[0015] On the other hand, the present utility model provides a precast multi-ribbed plate composite system, and the composite system includes at least two of the above-mentioned precast multi-ribbed plates, and adjacent two precast multi-ribbed plates are longitudinally connected by connecting shear-resistant members.

[0016] Optionally, the precast multi-ribbed plate composite system includes a steel conversion member, and the connecting shear-resistant members between adjacent two precast multi-ribbed plates are connected through the steel conversion member.

[0017] Optionally, a cushion block is provided below the steel conversion member for leveling two connecting shear-resistant members connected to each other; the precast multi-ribbed plate composite system further includes a post-cast strip, and the post-cast strip includes the area between two precast multi-ribbed plates above the cushion block.

[0018] Through the arrangement of the transverse ribs, longitudinal ribs and connecting shear-resistant members, the present utility model forms a new type of precast multi-ribbed plate with a simple structure, high load-bearing capacity, strong end shear resistance and convenient connection and installation between plates. Specifically, through the arrangement of the transverse ribs at both ends of the top plate, the shear resistance of the end of the multi-ribbed plate is improved, and at the same time, it can form a baffle when the multi-ribbed plates are combined and constructed later, forming a formwork space during pouring, which improves the convenience of actual construction and installation; through the arrangement of the longitudinal ribs, the load-bearing capacity of the multi-ribbed plate is further enhanced; the connecting shear-resistant member passes through the transverse rib and is connected to the longitudinal steel bar in the longitudinal rib, and the structure is stable; through the connecting shear-resistant member, the connection between two-span multi-ribbed plates at the support is more reliable. Compared with the traditional multi and dense steel bars at the support, the arrangement of the connecting shear-resistant member improves the construction efficiency. Further, through the specific structural arrangements of the top plate, transverse ribs and longitudinal ribs, including the shear-resistant members on the plate surface, two-way steel bar meshes, tie bars, etc., the load-bearing capacity, shear resistance, bending resistance and crack resistance of the multi-ribbed plate are improved in various aspects. And when the precast multi-ribbed plates are constructed and installed, they are connected in pairs to form a composite system; the settings of the steel conversion member, cushion block, post-cast strip, etc. at the connection form a construction plan with a simple structure, stable and reliable, and convenient installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structure diagram of the precast multi-ribbed plate of the present utility model.

[0020] Figure 2 It is a top view structural schematic diagram of the precast multi-ribbed plate of the present utility model.

[0021] Figure 3 This is the front view structural schematic diagram of the precast multi-ribbed slab of the present utility model.

[0022] Figure 4 This is the sectional view structural schematic diagram of the top plate and longitudinal ribs of the present utility model.

[0023] Figure 5 This is the structural relationship schematic diagram of the connecting shear-resistant member and the transverse ribs and longitudinal ribs of the present utility model.

[0024] Figure 6 This is the connecting structural schematic diagram of the end of the precast multi-ribbed slab assembly of the present utility model.

[0025] In the figure, 1-top plate, 11-two-way steel bar mesh of the top plate, 12-shear-resistant member on the plate surface, 2-transverse rib, 21-two-way steel bar mesh of the transverse rib, 3-longitudinal rib, 31-longitudinal steel bar, 32-U-shaped stirrup, 33-tie bar, 4-connecting shear-resistant member, 41-steel conversion member, 51-first precast multi-ribbed slab, 52-second precast multi-ribbed slab, 53-post-cast strip, 54-pad block. Specific embodiments

[0026] The technical solutions of the present utility model will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] As Figures 1 - 5 shown, the precast multi-ribbed slab of the embodiment of the present utility model includes a top plate 1. Transverse ribs 2 are provided at both ends of the bottom surface of the top plate 1 in the length direction. A plurality of longitudinal ribs 3 parallel to the length direction of the top plate are provided on the bottom surface of the top plate. Both ends of the longitudinal ribs 3 intersect with the inner side surfaces of the transverse ribs 2. Connecting shear-resistant members 4 are provided at both ends of one or more longitudinal ribs 3. One end of the connecting shear-resistant member 4 passes through the transverse rib 2 and extends into the longitudinal rib 3, and the other end is exposed relative to the outer side surface of the transverse rib 2. Among them, longitudinal steel bars 31 are provided in the longitudinal ribs, and one end of the connecting shear-resistant member 4 passes through the transverse rib 2 and is connected to the longitudinal steel bar 31.

[0028] Specifically, the transverse ribs in the precast multi-ribbed slab are arranged at the ends of the bottom surface of the top plate. A plurality of longitudinal ribs are perpendicular to the width direction of the top plate and are arranged on the bottom surface of the top plate, that is, on the same surface of the top plate as the transverse ribs. A plurality of connecting shear-resistant members are also provided at both ends of the top plate. The connecting shear-resistant members more specifically extend into both ends of the longitudinal ribs. In terms of quantity, there is at least 1 connecting shear-resistant member at each end of the precast multi-ribbed slab. In some solutions, connecting shear-resistant members are provided at both ends of each longitudinal rib. In other solutions, connecting shear-resistant members are provided at both ends of some longitudinal ribs, and connecting shear-resistant members may not be provided at both ends of some longitudinal ribs. That is, in different solutions, the quantity of the connecting shear-resistant members can be determined according to the number of longitudinal ribs and other actual requirements.

[0029] As can be seen from the above solution, the precast multi-ribbed slab of the present utility model has a simple structure without too many complex accessories; the arrangement of transverse ribs and longitudinal ribs strengthens the mechanical properties such as the bearing capacity and the shear resistance at the end of the multi-ribbed slab; in addition, the transverse ribs can form a formwork, creating an effective pouring space between the two plates, facilitating the post-cast construction work during installation; the setting of the connecting shear-resistant members solves the problems of a large number of steel bars at the end of the multi-ribbed slab and difficult installation, making the connection between the plates simple and the construction convenient.

[0030] Preferably, the concrete strength grade of the above precast multi-ribbed slab is not less than C40. High-strength concrete is beneficial to reducing the thickness of the multi-ribbed slab.

[0031] For the top plate 1, in some solutions, a two-way steel bar mesh is provided in the top plate 1, namely the top plate two-way steel bar mesh 11. The setting of the top plate two-way steel bar mesh is beneficial to the two-way stress on the surface of the multi-ribbed slab. In some solutions, a surface shear-resistant member 12 is provided on the top plate 1. More specifically, the bottom end of the surface shear-resistant member 12 is buried in the top plate 1 and connected to the top plate two-way steel bar mesh 11, and the top end exposes the surface of the top plate 1. The specific shape of the surface shear-resistant member can be set according to actual needs. Or, in some solutions, the surface of the top plate is treated by roughening. The setting of the above surface shear-resistant member 12 or the roughening treatment of the surface of the top plate helps the connection between the multi-ribbed slab and the cast-in-place layer and improves the shear resistance of the surface of the plate. For the size of the top plate, in some solutions, the thickness of the top plate is not less than 50 mm, the width is not less than 2400 mm, and the length is not less than 4000 mm. By restricting the minimum values of the above dimensions, the multi-ribbed slab is more economical when applied to industrial factories with larger spans.

[0032] For the transverse rib 2, in some solutions, in addition to setting transverse ribs at both ends of the top plate, transverse ribs are also provided at the mid-span in the length direction of the top plate. For the specific dimensions of the transverse rib, preferably, the width of the transverse rib ≥50 mm, the height ≥200 mm, and its length can be determined according to the width of the top plate. The setting of the transverse rib improves the integrity of the multi-ribbed slab. In some solutions, a two-way steel bar mesh is provided in the transverse rib 2, namely the transverse rib two-way steel bar mesh 21, and the setting of this two-way steel bar mesh improves the crack resistance of the transverse rib. In some solutions, the transverse rib two-way steel bar mesh 21 is connected to the top plate two-way steel bar mesh 11.

[0033] For the longitudinal ribs 3, in some solutions, the number of longitudinal ribs is greater than or equal to 3, and multiple longitudinal ribs are evenly distributed at equal intervals. The setting of the longitudinal ribs is beneficial to increasing the flexural resistance of the cross-section, and at the same time does not increase the volume of concrete, having high economy. For the size, in some solutions, the width of the longitudinal rib ≥ 50 mm, the height ≥ 200 mm, and its length can be determined according to the length of the top plate. In a more specific structure, multiple longitudinal rib steels are provided in the longitudinal rib 3, including longitudinal bars 31 and tie bars 33. The setting of the internal steel bars of the longitudinal rib improves the bearing capacity of the multi-ribbed slab. In the connection structure between the longitudinal rib 3 and the top plate 1, in some solutions, a two-way steel bar mesh 11 is provided in the top plate 1, and the longitudinal bar 31 is connected to the two-way steel bar mesh 11 of the top plate through the tie bar 33.

[0034] For the connecting shear-resistant member 4, in some solutions, the connecting shear-resistant member can be made of a steel member. When the connecting shear-resistant member 4 passes through the transverse rib 2 and is connected to the longitudinal rib, the end extending into the longitudinal rib 3 is reliably connected to the longitudinal bar 31 in the longitudinal rib, and more specifically, it is connected to the longitudinal bar 31 through a U-shaped stirrup 32. Thus, the connecting shear-resistant member is stably installed at the end of the multi-ribbed slab and can be well stressed for connecting the multi-ribbed slab and other components. In a specific solution, installation holes can be provided on the connecting shear-resistant member. When the multi-ribbed slab is subsequently installed, the connecting shear-resistant member can be stably connected to the connecting object through bolt connection of a steel sheet or other steel conversion members.

[0035] Based on the precast multi-ribbed slab in the above solutions, the present utility model also provides a precast multi-ribbed slab assembly, that is, a combined member formed by connecting multiple multi-ribbed slabs in pairs, forming a precast multi-ribbed slab combined system. The ends of two precast multi-ribbed slabs are connected to each other longitudinally through a connecting shear-resistant member. More specifically, as Figure 6 shown, for two precast multi-ribbed slabs, namely the first precast multi-ribbed slab 51 and the second precast multi-ribbed slab 52, their ends are connected longitudinally through a connecting shear-resistant member 4. During construction and installation, the two connecting shear-resistant members 4 are reliably connected through a steel conversion member 41; specifically, by providing installation holes on the connecting shear-resistant member 4 and bolt-connecting it to the steel conversion member 41. A cushion block 53 is provided below the steel conversion member to level the two connecting shear-resistant members 4 connected to each other and adjust the balance of the two connecting shear-resistant members; the combined system also includes a post-cast strip 53, and the post-cast strip includes the area between the two precast multi-ribbed slabs above the cushion block 54. After the connecting shear-resistant members are connected, concrete is post-cast at the post-cast part above the connection, that is, at the post-cast strip 53. Steel bar meshes can also be laid according to actual requirements during pouring. From the above connection solution of two ribbed slabs, it can be seen that the precast multi-ribbed slab of the present utility model facilitates the construction and installation of the multi-ribbed slab by providing transverse ribs at the ends. When two slabs are connected, the transverse ribs form a baffle-like structure, and the space between two adjacent transverse ribs constitutes a formwork space for post-casting, avoiding problems such as the post-cast concrete flowing to other places, causing inconvenience in construction and installation and material waste.

[0036] The present utility model has been described in detail in combination with specific embodiments and exemplary examples. However, these descriptions should not be construed as limiting the present utility model. Those skilled in the art understand that without departing from the spirit and scope of the present utility model, various equivalent substitutions, modifications or improvements can be made to the technical solutions and implementation manners of the present utility model, and all of these fall within the scope of the present utility model. The protection scope of the present utility model shall be subject to the appended claims.

Claims

1. A prefabricated multi-ribbed slab, characterized in that: It includes a top plate, at both ends of the bottom surface of the top plate in the length direction of which transverse ribs are provided, and at the bottom surface of the top plate, a plurality of longitudinal ribs parallel to the length direction of the top plate are provided, and longitudinal ribs are provided inside the longitudinal ribs, and at both ends of the longitudinal ribs intersect with the inner side surfaces of the transverse ribs; at both ends of one or more longitudinal ribs, connecting shear-resistant parts are provided; one end of the connecting shear-resistant part passes through the transverse ribs and is connected to the longitudinal ribs, and the other end is exposed relative to the outer side surface of the transverse ribs.

2. The prefabricated multi-ribbed slab according to claim 1, characterized in that: Connecting shear members are provided at both ends of each longitudinal rib.

3. The prefabricated multi-ribbed slab according to claim 1, characterized in that: The number of the longitudinal ribs is ≥3; the width of the longitudinal ribs is ≥50mm and the height is ≥200mm.

4. The prefabricated multi-ribbed slab according to claim 1, characterized in that: One end of the connecting shear member passes through the transverse rib and is connected to the longitudinal reinforcement via a U-shaped stirrup.

5. The prefabricated multi-ribbed slab according to claim 1, characterized in that: The top plate is provided with a plate surface shear-resistant member or the top plate surface is roughened.

6. The prefabricated multi-ribbed slab according to claim 1, characterized in that: A bidirectional steel mesh is arranged in the top plate; tie bars are arranged in the longitudinal ribs, and the longitudinal bars are connected to the bidirectional steel mesh of the top plate via the tie bars.

7. The prefabricated multi-ribbed slab according to claim 6, characterized in that: A transverse rib bidirectional steel mesh is arranged in the transverse rib, and the transverse rib bidirectional steel mesh is connected to the top plate bidirectional steel mesh.

8. The prefabricated multi-ribbed slab according to claim 1, characterized in that: A transverse rib is provided at the mid-span of the top plate in the length direction.

9. A prefabricated multi-ribbed panel assembly system, characterized in that: It comprises at least two prefabricated multi-ribbed slabs as described in any one of claims 1 to 8, wherein two adjacent prefabricated multi-ribbed slabs are connected longitudinally by connecting shear-resistant members.

10. The prefabricated multi-ribbed slab assembly system according to claim 9, characterized in that: The invention comprises a steel conversion part, and the connecting shear members between two adjacent prefabricated multi-rib plates are connected through the steel conversion part.

11. The prefabricated multi-ribbed slab assembly system according to claim 10, characterized in that: A cushion block is provided below the steel conversion member to align the two interconnected shear-resistant members; a post-cast strip is also provided, and the post-cast strip includes the area between the two prefabricated multi-rib plates above the cushion block.

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