A super high strength concrete sandwich prefabricated floor assembly

Abstract

The present invention discloses an ultra-high strength concrete sandwich prefabricated floor assembly, including a prefabricated floor, wherein the prefabricated floor includes an ultra-high strength concrete UHPC plate body and reinforcing steel, wherein the ultra-high strength concrete UHPC plate body has a thickness of 40 to 60 mm, and a plurality of reinforcing steels are respectively fixed on the same side of the ultra-high strength concrete UHPC plate body, and a plurality of prefabricated floor slabs are respectively connected to each other by stoppers. The present invention adopts ultra-high strength concrete UHPC to prepare the plate body, and utilizes the ultra-high mechanical properties of the material to reduce the thickness of the ordinary 100 mm thick sandwich plate to 40 to 60 mm, thereby effectively increasing the net height and expanding the available space; by arranging a plurality of C-shaped steels as reinforcing steels on one side of the ultra-high strength concrete UHPC plate body, the span and deflection are effectively reduced, and the quality of use is improved; by adopting standardized prefabricated components, it can be installed on site after prefabrication, and there is no wet operation on site, which can greatly reduce the construction difficulty and shorten the construction time.

Description

[Technical field]

[0001] The invention relates to the technical field of prefabricated wall panels, in particular to the technical field of an ultra-high-strength concrete sandwich prefabricated floor slab assembly. [Background technology]

[0002] As planning requirements in various places become increasingly stringent, the floor height of LOFT apartments has been shrinking, from the early 5.0 meters and 4.8 meters, to the later 4.5 meters, and now to the current 4.2 meters. This directly leads to the design of the mezzanine floor height of LOFT apartments becoming one of the most prominent difficulties in design and construction. In order to ensure the living comfort of users, designers need to make the thickness of the interlayer plate as thin as possible, while taking into account the convenience of construction and the appearance of use. However, the conventional pure concrete solution has the problem of excessive converted thickness, which affects the use of the net height, and requires the cleaning of the original wall and wet operation, resulting in dirty and messy sites. The solution using ordinary I-beams, patterned steel plates and wooden floors has the problems of high cost, large converted thickness, affecting the use of net height, large deflection, and poor user experience. [Summary of the invention]

[0003] The purpose of the present invention is to solve the problems in the prior art and to propose an ultra-high-strength concrete sandwich prefabricated floor assembly that can reduce the thickness of an ordinary 100mm thick sandwich panel to 40-60mm, thereby effectively increasing the net height and expanding the available space, while also reducing the construction difficulty and shortening the construction time.

[0004] To achieve the above-mentioned purpose, the present invention proposes an ultra-high-strength concrete sandwich prefabricated floor assembly, including a prefabricated floor, wherein the prefabricated floor includes an ultra-high-strength concrete UHPC plate body and reinforcing steel, the thickness of the ultra-high-strength concrete UHPC plate body is 40 to 60 mm, and a plurality of the reinforcing steels are respectively fixed on the same side of the ultra-high-strength concrete UHPC plate body.

[0005] Preferably, the reinforcing steel is C-shaped steel.

[0006] Preferably, two free ends of the C-shaped steel are respectively embedded in the ultra-high strength concrete UHPC plate.

[0007] Preferably, the reinforcing steels are arranged in parallel in the force direction with a spacing of 0.8 to 1.2 m.

[0008] Preferably, several of the prefabricated floor slabs are connected to each other via limiting members.

[0009] Preferably, the limiting member comprises a limiting plate, a supporting plate, a fastener and a metal bent plate, one end of the limiting plate is embedded in a recess on the end face of the ultra-high strength concrete UHPC plate body and a plurality of semicircular holes are provided on the other end face, the semicircular holes of the limiting plates of two adjacent prefabricated floor slabs are spliced ​​to form a complete first hole body, the top surface of the supporting plate is close to the bottom surface of the prefabricated floor slab and a second hole body is provided in the middle, the fastener connects the limiting plate and the supporting plate through the first hole body and the second hole body, and the two ends of the plurality of metal bent plates are respectively connected to the supporting plate and the prefabricated floor slab.

[0010] Preferably, the bolts of the fasteners are fixed to the semicircular holes of the limiting plates of one of the two adjacent prefabricated floor slabs.

[0011] Preferably, the bottom surfaces of the support plate and the prefabricated wall panel are respectively provided with a first card slot and a second card slot, and both ends of the metal bent plate are respectively provided with card strips that are inserted into the first card slot and the second card slot.

[0012] Preferably, the end surface of the prefabricated floor slab is provided with an inclined surface above the recess so as to form a flange for pressing the top ends of two adjacent prefabricated floor slabs against each other.

[0013] Preferably, an elastic pad is provided between the recess and the limiting plate.

[0014] Beneficial effects of the invention: The invention adopts ultra-high strength concrete UHPC to prepare the plate body, and utilizes the ultra-high mechanical properties of the material to reduce the thickness of the ordinary 100mm thick sandwich plate to 40-60mm, thereby effectively increasing the net height and expanding the available space; by arranging a number of C-shaped steels as reinforcing steels on one side of the ultra-high strength concrete UHPC plate body, the span and deflection are effectively reduced, and the use quality is improved; by adopting standardized prefabricated components, it can be installed on site after prefabrication, and there is no on-site wet operation, which can greatly reduce the construction difficulty and shorten the construction time. The product has good flatness, and the plate surface can be directly paved with bricks or wooden floors, without Leveling is required; by setting support plates and metal bent plates, the ultra-high-strength concrete UHPC panels of two adjacent prefabricated floor slabs are initially fixed, and the slight deformation of the metal bent plates can be used to adapt to the thermal expansion and contraction of the panels, thereby avoiding the warping of the panels at the joints; by pre-embedding limit plates in the ultra-high-strength concrete UHPC panels and splicing them to form a complete first hole body, and then using fasteners to connect the limit plates and support plates, the ultra-high-strength concrete UHPC panels are secondarily fixed to increase the stability of the connection between the panels; by setting elastic pads in the recesses, a certain deformation space is provided for the limit plates, thereby further avoiding the warping of the panels at the joints.

[0015] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0016] Figure 1 It is a three-dimensional structural schematic diagram of a prefabricated floor slab of an ultra-high-strength concrete sandwich prefabricated floor slab assembly of the present invention;

[0017] Figure 2 It is a front view of a prefabricated floor slab of an ultra-high-strength concrete sandwich prefabricated floor slab assembly of the present invention;

[0018] Figure 3 It is a connection schematic diagram of a prefabricated floor slab of an ultra-high-strength concrete sandwich prefabricated floor slab assembly of the present invention;

[0019] Figure 4 It is a schematic diagram of the end surface structure of a prefabricated floor slab of an ultra-high-strength concrete sandwich prefabricated floor slab assembly of the present invention;

[0020] Figure 5 It is an exploded schematic diagram of a stopper of an ultra-high-strength concrete sandwich prefabricated floor slab assembly of the present invention;

[0021] Figure 6 It is a top view of a limit plate of an ultra-high-strength concrete sandwich prefabricated floor slab assembly of the present invention.

[0022] In the figure: 1-ultra-high strength concrete UHPC plate, 11-notch, 12-second slot, 13-inclined surface, 14-flange, 2-reinforcement steel, 3-limiting member, 31-limiting plate, 311-semicircular hole, 32-support plate, 321-first slot, 33-fastener, 34-metal bent plate, 341-strip, 35-elastic pad. [Specific implementation method]

[0023] See also Figures 1 to 6 The present invention discloses an ultra-high-strength concrete sandwich prefabricated floor assembly, comprising a prefabricated floor, wherein the prefabricated floor comprises an ultra-high-strength concrete UHPC plate body 1 and reinforcing steel 2, wherein the thickness of the ultra-high-strength concrete UHPC plate body 1 is 50 mm, and a plurality of reinforcing steels 2 are respectively fixed on the same side of the ultra-high-strength concrete UHPC plate body 1.

[0024] The reinforcing steel 2 is C-shaped steel.

[0025] The two free ends of the C-shaped steel are respectively embedded in the ultra-high strength concrete UHPC plate body 1 .

[0026] The reinforcing steels 2 are arranged in parallel in the force direction with a spacing of 1 m.

[0027] The plurality of prefabricated floor slabs are connected to each other via stoppers 3 .

[0028] The limiting member 3 includes a limiting plate 31, a supporting plate 32, a fastener 33 and a metal bent plate 34. One end of the limiting plate 31 is embedded in a recess on the end face of the ultra-high strength concrete UHPC plate body 1 and a plurality of semicircular holes 311 are provided on the other end face. The semicircular holes 311 of the limiting plates 31 of two adjacent prefabricated floor slabs are spliced ​​to form a complete first hole body. The top surface of the supporting plate 32 is close to the bottom surface of the prefabricated floor slab and a second hole body is provided in the middle. The fastener 33 connects the limiting plate 31 and the supporting plate 32 through the first hole body and the second hole body. The two ends of the plurality of metal bent plates 34 are respectively connected to the supporting plate 32 and the prefabricated floor slab.

[0029] The bolts of the fasteners 33 are fixed to the semicircular holes 311 of the limiting plates 31 of one of the two adjacent prefabricated floor slabs.

[0030] The bottom surfaces of the support plate 32 and the prefabricated wallboard are respectively provided with a first card slot 321 and a second card slot 12 , and both ends of the metal bent plate 34 are respectively provided with card strips 341 that are inserted into the first card slot 321 and the second card slot 12 .

[0031] The end surface of the prefabricated floor slab is provided with an inclined surface 13 above the notch 11 to form a flange 14 for pressing the top ends of two adjacent prefabricated floor slabs against each other.

[0032] An elastic pad 35 is provided between the notch and the limiting plate 31 .

[0033] Working process of the present invention:

[0034] The prefabricated floor slabs can be directly constructed and used. If it is necessary to splice and enlarge several prefabricated floor slabs, first splice the ultra-high strength concrete UHPC slabs 1 of two adjacent prefabricated floor slabs until their flanges 14 are pressed against each other. At this time, the limit plates 31 installed on the ultra-high strength concrete UHPC slabs 1 of the two adjacent prefabricated floor slabs are also close to each other, so that the semicircular holes 311 are spliced ​​to form a complete first hole body, and the bolts of the limit members 3 are located in the first hole body. Next, the bolts are passed through the second hole body of the support plate 32, and then threadedly connected with the nuts, and the top surface of the support plate 32 is fitted with the bottom surface of the ultra-high strength concrete UHPC slab 1. Subsequently, the clips 341 at both ends of the metal bent plate 34 are respectively inserted into the first slot 321 of the support plate 32 and the second slot 12 of the ultra-high strength concrete UHPC slab 1.

[0035] The present invention adopts ultra-high strength concrete UHPC to prepare the plate body, and utilizes the ultra-high mechanical properties of the material to reduce the thickness of the ordinary 100mm thick sandwich plate to 40-60mm, thereby effectively increasing the net height and expanding the available space; by arranging a plurality of C-shaped steels as reinforcing steels on one side of the ultra-high strength concrete UHPC plate body, the span and deflection are effectively reduced, and the use quality is improved; by adopting standardized prefabricated components, it can be installed on site after prefabrication, and there is no on-site wet operation, which can greatly reduce the construction difficulty and shorten the construction time. The product has good flatness, and the plate surface can be directly paved with bricks or wooden floors without leveling; By arranging a support plate and a metal bent plate to preliminarily fix the ultra-high-strength concrete UHPC panels of two adjacent prefabricated floor slabs, the slight deformation of the metal bent plate can be used to adapt to the thermal expansion and contraction of the panel, thereby avoiding the warping of the panel joints; by pre-embedding a limit plate in the ultra-high-strength concrete UHPC panel and splicing them to form a complete first hole body, and then connecting the limit plate and the support plate with fasteners, the ultra-high-strength concrete UHPC panel is secondarily fixed, thereby increasing the stability of the connection between the panels; by arranging an elastic pad in the notch, a certain deformation space is provided for the limit plate, thereby further avoiding the warping of the panel joints.

[0036] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. An ultra-high-strength concrete sandwich prefabricated floor assembly, characterized in that: The invention comprises a prefabricated floor slab, wherein the prefabricated floor slab comprises an ultra-high strength concrete (UHPC) slab body (1) and reinforcing steel (2), wherein the thickness of the ultra-high strength concrete (UHPC) slab body (1) is 40 to 60 mm, a plurality of reinforcing steels (2) are respectively fixed on the same side of the ultra-high strength concrete (UHPC) slab body (1), and a plurality of prefabricated floor slabs are respectively connected to each other via limiting members (3), wherein the limiting members (3) comprise a limiting plate (31), a supporting plate (32), a fastener (33) and a metal bent plate (34), and one end of the limiting plate (31) is pre-buried in a A plurality of semicircular holes (311) are provided on the other end surface of the ultra-high strength concrete UHPC plate body (1) in a recess, the semicircular holes (311) of the limiting plates (31) of two adjacent prefabricated floor slabs are spliced ​​to form a complete first hole body, the top surface of the support plate (32) is closely attached to the bottom surface of the prefabricated floor slab and a second hole body is provided in the middle, the fastener (33) connects the limiting plate (31) and the support plate (32) through the first hole body and the second hole body, and the two ends of the plurality of metal bent plates (34) are respectively connected to the support plate (32) and the prefabricated floor slab.

2. The ultra-high strength concrete sandwich prefabricated floor assembly according to claim 1, characterized in that: The reinforcing steel (2) is C-shaped steel.

3. The ultra-high strength concrete sandwich prefabricated floor assembly according to claim 2, characterized in that: The two free ends of the C-shaped steel are respectively pre-embedded in the ultra-high strength concrete UHPC plate body (1).

4. The ultra-high strength concrete sandwich prefabricated floor assembly according to claim 1, characterized in that: The reinforcing steels (2) are arranged in parallel in sequence along the force direction and the spacing is 0.8 to 1.2 m.

5. The ultra-high strength concrete sandwich prefabricated floor assembly according to claim 1, characterized in that: The bolts of the fasteners (33) are fixed in the semicircular holes (311) of the limiting plates (31) of one of the two adjacent prefabricated floor slabs.

6. The ultra-high strength concrete sandwich prefabricated floor assembly according to claim 1, characterized in that: The bottom surfaces of the support plate (32) and the prefabricated wall panel are respectively provided with a first card slot (321) and a second card slot (12), and both ends of the metal bent plate (34) are respectively provided with card strips (341) that are inserted into the first card slot (321) and the second card slot (12).

7. The ultra-high strength concrete sandwich prefabricated floor assembly according to claim 1, characterized in that: The end surface of the prefabricated floor slab is provided with an inclined surface (13) above the notch (11), thereby forming a flange (14) that allows the top ends of two adjacent prefabricated floor slabs to press against each other.

8. The ultra-high strength concrete sandwich prefabricated floor assembly according to claim 1, characterized in that: An elastic pad (35) is provided between the notch and the limiting plate (31).

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