Unidirectional laminated slab structure of special-shaped cavity bottom plate

Abstract

The invention discloses a one-way laminated slab structure of a special-shaped cavity bottom plate. The one-way laminated slab structure is composed of the special-shaped cavity bottom plate which is transversely and closely spliced, post-pouring concrete, a surface layer reinforcing mesh, longitudinal connecting reinforcing steel bars and longitudinal connecting concrete. The special-shaped cavity bottom plate is composed of a longitudinal through bottom rib, a vertical rib, an arch rib, an inclined rib and an angle brace, a plurality of special-shaped sections with cavities in different shapes are formed, the special-shaped cavity bottom plate is made of ultra-high performance concrete (UHPC), and the special-shaped cavity bottom plate does not need to be provided with reinforcing bars. The special-shaped cavity bottom plates are longitudinally connected through longitudinal connecting steel bars and longitudinal connecting concrete, and the longitudinal connecting steel bars and the longitudinal connecting concrete are arranged in cavities in the corners of the special-shaped cavity bottom plates. The special-shaped cavity bottom plate is transversely connected through post-poured concrete and a surface layer reinforcing mesh; the section form of the special-shaped cavity bottom plate can be optimized, the line shape of the arch rib can be designed into an arc line or a parabola, the inclined angle of the inclined rib can be adjusted, and the angle and the number of the angle brace can be adjusted. The one-way laminated slab structure of the special-shaped cavity bottom plate saves materials, is light in self weight and high in performance, can achieve mold-free, support-free, sound-insulation and heat-insulation, and achieves an efficient and high-quality structure.

Description

Technical Field

[0001] The invention belongs to the technical field of assembled concrete structures, and in particular relates to a one-way composite plate structure of a special-shaped cavity bottom plate. Background Art

[0002] Composite slabs have become a common component type in my country's current prefabricated concrete structure projects due to their simple production and convenient construction.

[0003] In order to save steel bars and achieve a larger spanning capacity, composite slabs are often designed as two-way slabs. In order to achieve the mechanical properties of traditional cast-in-place two-way slabs, a 300mm to 400mm wide integral joint is generally required between the bottom plates of the composite slabs. This part requires independent formwork and support, which brings great trouble to the construction. On the other hand, although the spanning capacity of the one-way slab is lower than that of the two-way slab due to the constraints of its force mechanism and the amount of steel bars used will be more, its bottom plates can be closely spliced, thus providing conditions for formwork-free.

[0004] Therefore, for prefabricated concrete structures, one-way slabs have clearer force, are simpler to manufacture, and are quicker to install. If the problems of spanning capacity and excessive reinforcement are further solved, and at the same time the concept of "good house" with excellent sound insulation and heat insulation properties promoted by the industry in my country is met, it will provide a scientific floor structure solution for the project and promote the development and improvement of my country's prefabricated concrete structure technology. Summary of the invention

[0005] In view of the industry pain points of the current one-way composite slabs, such as low spanning capacity and more reinforcement, the present invention provides a one-way composite slab structure with a special-shaped cavity bottom plate, thereby realizing a one-way composite slab structure with saved materials, light weight, strong performance, and good sound insulation and heat insulation.

[0006] The present invention provides the following technical solutions:

[0007] A one-way composite plate structure of a special-shaped cavity bottom plate comprises a transversely closely spliced ​​special-shaped cavity bottom plate, longitudinally connected steel bars, longitudinally connected concrete, post-cast concrete and a surface steel mesh.

[0008] The special-shaped cavity bottom plate is composed of longitudinal bottom ribs, vertical ribs, arch ribs, diagonal ribs and corner braces to form a plurality of special-shaped cross-sections of cavities of different shapes. The material is ultra-high performance concrete (UHPC), and the special-shaped cavity bottom plate does not require reinforcement.

[0009] Preferably, the special-shaped cavity bottom plate is longitudinally connected by longitudinally connecting steel bars and longitudinally connecting concrete, and the longitudinally connecting steel bars and longitudinally connecting concrete are both arranged in the cavity at the corner of the special-shaped cavity bottom plate.

[0010] Preferably, the special-shaped cavity bottom plate is laterally connected by post-cast concrete and a surface steel mesh arranged on the top of the special-shaped cavity bottom plate.

[0011] Preferably, the cross-sectional form of the special-shaped cavity bottom plate can be optimized according to design conditions, the arch rib line shape can be designed to be a circular arc or a parabola, the inclined rib can adjust its inclination angle, and the angle and number of the corner brace can be adjusted.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) The special-shaped cavity bottom plate of the present invention achieves material saving and reduced plate deadweight through cavity treatment; the application of UHPC material not only facilitates the molding and production of the cross section, but also makes full use of the high strength performance of the material to achieve no reinforcement; combined with cross-sectional innovation and the application of UHPC, the special-shaped cavity bottom plate has higher cross-sectional bending stiffness and bending bearing capacity with the same material usage, and achieves a stronger spanning capacity of the bottom plate, and further can achieve formwork-free and support-free construction.

[0014] (2) The special-shaped cavity of the present invention provides a natural space for the arrangement of steel bars and the pouring of concrete required for the longitudinal connection of the bottom plate, thus facilitating the construction.

[0015] (3) The stress-bearing performance of the cross-section of the special-shaped cavity bottom plate of the present invention is efficient, and the arch rib adopts an optimized line shape of an arc or a parabola, which can better transmit the pressure of the post-cast concrete; the improvement of the angle of the inclined ribs, the angle of the corner braces and the number of the angles can improve the stress of the bottom ribs and the vertical ribs, and improve the bending stiffness and bending bearing capacity of the entire cross-section of the bottom plate.

[0016] (4) The large number of cavities of the special-shaped cavity bottom plate of the present invention effectively improves the sound insulation and heat insulation performance of the one-way composite board, and improves its building performance and component quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the one-way laminated plate structure of the present invention.

[0018] Figure 2 It is a schematic cross-sectional view of a one-way laminated plate of the present invention.

[0019] Figure 3 It is a schematic cross-sectional view of the special-shaped cavity bottom plate of the present invention.

[0020] Figure 4 It is a schematic diagram of the longitudinal connection structure of the special-shaped cavity bottom plate of the present invention.

[0021] The markings in the figure are: 1. Special-shaped cavity bottom plate; 1.1. Bottom rib; 1.2. Vertical rib; 1.3. Arch rib; 1.4. Diagonal rib; 1.5. Corner brace; 2. Longitudinal connecting steel bars; 3. Longitudinal connecting concrete; 4. Post-poured concrete; 5. Surface steel mesh. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0023] It should be noted that, in the description of the present invention, the directions or positional relationships indicated by terms such as "front", "rear", "left", "right", "up", "down", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0024] like Figures 1 to 4 As shown, a one-way composite plate structure of a special-shaped cavity bottom plate comprises a transversely closely-jointed special-shaped cavity bottom plate (1), longitudinally connected steel bars (2), longitudinally connected concrete (3), post-cast concrete (4) and a surface steel mesh (5).

[0025] The special-shaped cavity bottom plate (1) is composed of longitudinally continuous bottom ribs (1.1), vertical ribs (1.2), arch ribs (1.3), oblique ribs (1.4) and corner braces (1.5), forming a plurality of special-shaped cross-sections of cavities of different shapes. The material used is ultra-high performance concrete (UHPC), and the special-shaped cavity bottom plate (1) does not require reinforcement.

[0026] The special-shaped cavity bottom plate (1) is longitudinally connected by longitudinally connecting steel bars (2) and longitudinally connecting concrete (3), and the longitudinally connecting steel bars (2) and longitudinally connecting concrete (3) are both arranged in the cavity at the corner of the special-shaped cavity bottom plate (1).

[0027] The special-shaped cavity bottom plate (1) is laterally connected by post-cast concrete (4) and a surface layer steel mesh (5) arranged on the top of the special-shaped cavity bottom plate (1).

[0028] The cross-sectional form of the special-shaped cavity bottom plate (1) can be optimized according to design conditions, the linear shape of the arch rib (1.1) can be designed as a circular curve or a parabola, the inclined rib (1.4) can adjust its inclination angle, and the angle brace (1.5) can adjust its angle and quantity.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A one-way laminated plate structure of a special-shaped cavity bottom plate, characterized in that: It comprises a transversely closely joined special-shaped cavity bottom plate (1), longitudinally connected steel bars (2), longitudinally connected concrete (3), post-cast concrete (4) and a surface steel mesh (5). The special-shaped cavity bottom plate (1) is composed of longitudinally continuous bottom ribs (1.1), vertical ribs (1.2), arch ribs (1.3), oblique ribs (1.4) and corner braces (1.5), forming a plurality of special-shaped cross-sections of cavities of different shapes. The material used is ultra-high performance concrete (UHPC), and the special-shaped cavity bottom plate (1) does not require reinforcement.

2. The special-shaped cavity bottom plate according to claim 1, characterized in that: The special-shaped cavity bottom plate (1) is longitudinally connected by longitudinally connecting steel bars (2) and longitudinally connecting concrete (3), and the longitudinally connecting steel bars (2) and longitudinally connecting concrete (3) are both arranged in the cavity at the corner of the special-shaped cavity bottom plate (1).

3. The special-shaped cavity bottom plate according to claim 1, characterized in that: The special-shaped cavity bottom plate (1) is laterally connected by post-cast concrete (4) and a surface layer steel mesh (5) arranged on the top of the special-shaped cavity bottom plate (1).

4. The special-shaped cavity bottom plate according to claim 1, characterized in that: The cross-sectional form of the special-shaped cavity bottom plate (1) can be optimized according to design conditions, the linear shape of the arch rib (1.1) can be designed as a circular arc or a parabola, the inclined rib (1.4) can adjust its inclination angle, and the angle and number of the corner brace (1.5) can be adjusted.

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