Prestress dense rib sandwich floor slab

Abstract

The floor slab comprises a lower panel, an upper panel, longitudinal rib beams and light filling battens, the light filling battens are located in cavities formed by the lower panel, the upper panel and the longitudinal rib beams, transversely-penetrating grooves are formed in the light filling battens, and the longitudinal rib beams and the light filling battens are arranged in the grooves. A plurality of connecting boxes with upward openings are evenly arranged on each edge of the floor, reserved sleeves are arranged on the sides, close to the edges of the floor, of the connecting boxes, light filling strip plates are arranged in the prestressed dense rib sandwich floor, light filling strips are EPS plates or XPS plates, the floor is light in overall mass and good in heat preservation effect, and the prestressed dense rib sandwich floor is suitable for being used for a large number of buildings. The floor slab can be connected with the wall plate in various forms such as bolt connection and welding of the bar grouting connection box, the connection is convenient, and the construction is rapid.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated buildings, and in particular to a prestressed dense-ribbed sandwich floor. Background Art

[0002] With the development of modern industrial technology, prefabricated concrete buildings have gradually replaced the cast-in-place concrete building system in the existing technology with the advantages of fast construction speed, less climatic constraints, and labor saving. The floor slabs used in prefabricated buildings are generally solid concrete slab structures, which are heavy and costly to produce, and their thermal insulation effect needs to be improved; the floor slabs and wall panels are connected by columns, which is inconvenient to connect. Summary of the invention

[0003] The present invention solves the problem of heavy floor slab weight and inconvenient connection in the prior art, and proposes a prestressed multi-rib sandwich floor slab to reduce the weight of the floor slab.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A prestressed multi-rib sandwich floor comprises a lower panel, an upper panel, longitudinal rib beams and a light filling strip, wherein the light filling strip is located in a cavity formed by the lower panel, the upper panel and the longitudinal rib beams, and a transversely penetrating groove is arranged on the light filling strip. The light filling strip is arranged inside the floor to reduce the deadweight of the floor.

[0006] The lightweight filling strips are provided with transverse grooves. During the manufacturing process of the floor slabs, the concrete of the upper panel can be embedded in the grooves to strengthen the bonding strength between the filling strips and the upper panel. The concrete in the multiple grooves can form transverse ribs to enhance the structural strength of the floor slabs.

[0007] Preferably, each edge of the floor slab is evenly provided with a connection box for realizing bolt connection of the floor slab, and bolt holes are provided on the connection box.

[0008] Preferably, each edge of the floor slab is evenly provided with grouting holes for realizing reinforcement grouting connection of the floor slab.

[0009] Preferably, each edge of the floor slab is evenly provided with embedded metal plates for realizing floor slab welding.

[0010] Preferably, the material of the lightweight filling strips is EPS board or XPS board. Both EPS board and XPS board are polystyrene foam boards, which are lightweight, easy to carry and install, and have good thermal insulation and waterproof effects.

[0011] Preferably, the lower panel, upper panel and longitudinal rib beam adopt a bulk density less than 1500kg / m 3, the thermal conductivity is less than 0.3W / (m·k) and the strength is greater than 20Mpa. The all-light aggregate structural concrete is light in weight and reduces the thermal bridge effect of the rib beam, with good thermal insulation effect.

[0012] The present invention also proposes a production process for producing the above-mentioned prestressed multi-rib sandwich floor, comprising the following steps:

[0013] Step 1: Forming, on a workbench, combine two end plates and two side plates to form a rectangular mold, with multiple process holes set on the side plates, the positions of which correspond to the grooves of the lightweight filling strips;

[0014] Step 2: pouring a first concrete inside the mold, the first concrete is used to form a lower panel;

[0015] Step 3: Place lightweight filling strips on top of the first concrete;

[0016] Step 4: insert a process tube that matches the process hole into the process hole of the side plate, and pass the process tube through the process holes of the two side plates and the groove of the lightweight filling strip plate;

[0017] Step 5: pouring a second concrete inside the mold, the second concrete is used to form a longitudinal rib beam;

[0018] Step 6: Pull out the process tube from one side of the side mold;

[0019] Step 7: pouring the third concrete inside the mold, and after the third concrete fills the groove, an upper panel is formed above the lightweight filling strip to obtain a floor slab;

[0020] Step 8: Demoulding, separate the two end panels and two side panels from the floor slab.

[0021] The present invention also proposes a mold, which is used to realize the production process of the above-mentioned prestressed dense-ribbed sandwich floor, and the mold includes two end plates and two side plates, and the two end plates and the two side plates are combined to form a rectangular mold, the two end plates are arranged in parallel, the two side plates are arranged in parallel, the end plates and the side plates are arranged vertically, and a plurality of process holes are opened on the side plates, and the positions of the process holes correspond to the grooves of the lightweight filling strips.

[0022] The beneficial effects of the present invention are:

[0023] 1. The prestressed dense-rib sandwich floor is provided with light-weight filling strips inside. The light-weight filling strips are EPS boards or XPS boards. The upper panel, longitudinal rib beams and transverse rib beams are made of all-lightweight aggregate structural concrete. The overall weight of the wall panel is light and the thermal insulation effect is good.

[0024] 2. The lightweight filling strips of the prestressed dense-rib sandwich slab are provided with transversely penetrating grooves, which can strengthen the bonding strength between the filling strips and the upper panel and enhance the structural strength of the slab.

[0025] 3. This prestressed dense-rib sandwich floor can be pre-set with connection boxes, grouting holes and embedded metal plates for connection with wall panels. The floor can be connected to the wall panels by bolt connection, reinforcement grouting connection box welding and other forms, which is convenient to connect and fast to construct.

[0026] 4. The production process of the prestressed dense-ribbed sandwich slab and its mold are used to produce the prestressed dense-ribbed sandwich slab. The transversely penetrating grooves arranged on the light-filled strips are used for inserting process pipes. The process pipes can limit the light-filled strips to prevent the light-filled strips from moving and floating, which is convenient for pouring and vibrating concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of the prestressed multi-rib sandwich slab;

[0028] Figure 2 This is a structural schematic diagram of the transverse section of the prestressed multi-rib sandwich slab;

[0029] Figure 3 This is a structural schematic diagram of the prestressed multi-rib sandwich slab filled with strips;

[0030] Figure 4 This is a structural schematic diagram of the prestressed multi-rib sandwich slab and the wall panel when they are threadedly connected;

[0031] Figure 5 This is a schematic diagram of the structure of this mold (the process hole is a round hole);

[0032] Figure 6 This is a structural schematic diagram of the mold (the process hole is a square hole);

[0033] Figure 7 This is a structural schematic diagram of the prestressed multi-rib sandwich slab and the wall panel when connected by reinforcing bars and grouting;

[0034] Figure 8 This is a structural schematic diagram of the prestressed dense-rib sandwich floor slab and wall panel when welded.

[0035] In the figure: 1, lower layer; 2, upper layer; 3, longitudinal ribs; 4, lightweight filling strips; 5, connection box; 6, wall panel; 7, mold; 8, grouting hole; 9, embedded metal plate; 41, groove; 71, end plate; 72, side plate; 73, round hole; 74, square hole. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] Example 1

[0038] Reference Figure 1-3 A prestressed multi-rib sandwich floor comprises a lower panel 1, an upper panel 2, a longitudinal rib beam 3 and a light filling strip 4. The light filling strip 4 is located in a cavity formed by the lower panel 1, the upper panel 2 and the longitudinal rib beam 3. A transversely penetrating groove 41 is arranged on the light filling strip 4. The light filling strip 4 is arranged inside the floor to reduce the dead weight of the floor.

[0039] A transversely penetrating groove 41 is provided on the lightweight filling strip 4. During the floor manufacturing process, when the upper panel 2 is cast, the concrete of the upper panel 2 can be embedded in the groove 41 to strengthen the bonding strength between the filling strip 4 and the upper panel 2. The concrete in the plurality of grooves 41 can form transverse ribs to enhance the structural strength of the floor.

[0040] In this embodiment, the material of the lightweight filling strip 4 is EPS board or XPS board. Both EPS board and XPS board are polystyrene foam boards, which are light in weight, easy to carry and install, and have good thermal insulation and waterproof effects.

[0041] In this embodiment, the lower panel 1, the upper panel 2, and the longitudinal rib beam 3 are made of a material with a bulk density less than 1500 kg / m 3 , the thermal conductivity is less than 0.3W / (m·k) and the strength is greater than 20Mpa. The all-light aggregate structural concrete is light in weight and reduces the thermal bridge effect of the rib beam, with good thermal insulation effect.

[0042] Example 2

[0043] This embodiment proposes a production process for producing the prestressed multi-ribbed sandwich floor in Embodiment 1 and a mold 7, wherein the mold 7 is used to implement the above-mentioned production process for the prestressed multi-ribbed sandwich floor.

[0044] refer to Figure 6 and Figure 7The mold 7 includes two end plates 71 and two side plates 72. The two end plates 71 and the two side plates 72 are combined to form a rectangular mold. The rectangular mold and the workbench form a casting space. The two end plates 71 are arranged in parallel, the two side plates 72 are arranged in parallel, and the end plates 71 and the side plates 72 are arranged vertically. A plurality of process holes are opened on the side plates 72, and the positions of the process holes correspond to the grooves 41 of the lightweight filling strips 4. When pouring the floor slab, the process holes are used to insert the process pipes, which can pass through the grooves 41 of the lightweight filling strips 4 to limit the lightweight filling strips 4, prevent the lightweight filling strips 4 from moving and floating, and facilitate the pouring and vibration of concrete.

[0045] refer to Figure 6 and Figure 7 The process hole package can be set as a round hole 73 or a square hole 74. When the process hole package is a round hole 73, the process tube is a round tube; when the process hole package is a square hole 74, the process tube is a square tube. The process hole is a round hole 73 and the process tube is a round tube, which is easy to extract.

[0046] In this embodiment, the production process of the prestressed multi-rib sandwich floor comprises the following steps:

[0047] Step 1: Forming a mold, assembling two end plates 71 and two side plates 72 on a workbench to form a mold 7;

[0048] Step 2: pouring a first concrete inside the mold 7, the first concrete is used to form the lower panel 1;

[0049] Step 3: placing a lightweight filling strip 4 on top of the first concrete;

[0050] Step 4: insert a process tube that matches the process hole into the process hole 73 of the side plate 72, and pass through the process holes of the two side plates 73 and the groove 41 of the light filling strip plate 4, so that the process tube limits the light filling strip plate 4;

[0051] Step 5: pouring a second concrete inside the mold 7, the second concrete is used to form the longitudinal rib beam 3;

[0052] Step 6: Pull out the process tube from one side of the side mold 72;

[0053] Step 7: pouring the third concrete inside the mold 7, the third concrete fills the groove 41 and forms the upper panel 1 above the lightweight filling strip 4 to obtain the floor slab;

[0054] Step 8: Separate the two end plates 71 and the two side plates 72 from the floor slab to complete demoulding.

[0055] Example 3

[0056] Different from Example 1, Figure 1 and Figure 4 , multiple connection boxes 5 are evenly arranged on each edge of the floor slab 1, and bolt holes are arranged on one side of the connection box 5 close to the edge of the floor slab, and the bolt holes are used for bolts to pass through. When the floor slab is connected to the wall panel 6, the wall panel 6 is also provided with a corresponding connection box, and the connection box of the wall panel 6 is also provided with a bolt hole. The bolt holes of the floor slab and the wall panel 6 can cooperate with each other, and the bolts pass through the bolt holes of the two connection boxes to complete the bolt connection between the floor slab and the wall panel 6, which is convenient for connection.

[0057] Example 4

[0058] Different from Example 1, Figure 7 A plurality of grouting holes 8 are evenly arranged on each edge of the floor slab, and the wall panel 6 is provided with connecting steel bars corresponding to the positions of the grouting holes 8. The connecting steel bars can be inserted into the grouting holes 8 of the floor slab, and the reinforcement grouting connection between the floor slab and the wall panel 6 is completed by grouting inside the grouting holes 8.

[0059] Example 5

[0060] Different from Example 1, Figure 8 A plurality of embedded metal plates 9 are evenly arranged on each edge of the floor slab, and a corresponding position of the wall panel 6 is also provided with embedded metal parts for connection. The embedded metal plates 9 of the floor slab and the metal parts of the wall panel 6 can be welded to realize the connection between the floor slab and the wall panel.

[0061] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A prestressed multi-rib sandwich slab, characterized in that: It comprises a lower panel, an upper panel, longitudinal ribs and a light filling strip, wherein the light filling strip is located in a cavity formed by the lower panel, the upper panel and the longitudinal ribs, and a transversely penetrating groove is arranged on the light filling strip.

2. The prestressed multi-ribbed sandwich floor according to claim 1, characterized in that: Each edge of the floor slab is evenly provided with a connection box for realizing bolt connection of the floor slab, and bolt holes are arranged on the connection box.

3. The prestressed multi-rib sandwich floor according to claim 1, characterized in that: Each edge of the floor slab is evenly provided with grouting holes for realizing reinforcement grouting connection of the floor slab.

4. The prestressed multi-rib sandwich floor according to claim 1, characterized in that: Each edge of the floor slab is evenly provided with a pre-buried metal plate for realizing floor slab welding.

5. The prestressed multi-ribbed sandwich slab according to any one of claims 1 to 4, characterized in that: The material of the light filling strip board is EPS board or XPS board.

6. The prestressed multi-rib sandwich floor according to claim 5, characterized in that: The lower panel, upper panel and longitudinal rib beam adopt a bulk density less than 1500kg / m 3 , all-light aggregate structural concrete with thermal conductivity less than 0.3W / (m·k) and strength greater than 20Mpa.

7. A production process for producing the prestressed multi-ribbed sandwich floor according to claim 1, characterized in that: The following steps are involved: Step 1: Forming a mold, combining two end plates and two side plates on a workbench to form a mold, wherein the side plates are provided with a plurality of process holes, and the positions of the process holes correspond to the grooves of the lightweight filling strips; Step 2: pouring a first concrete inside the mold, wherein the first concrete is used to form a lower panel; Step 3: Place lightweight filling strips on top of the first concrete; Step 4: inserting a process tube adapted to the process hole into the process hole of the side plate, the process tube passing through the process holes of the two side plates and the groove of the lightweight filling strip plate; Step 5: pouring a second concrete inside the mold, wherein the second concrete is used to form a longitudinal rib beam; Step 6: Pull out the process tube from one side of the side mold; Step 7: pouring a third concrete inside the mold, wherein the third concrete fills the groove and forms an upper panel above the lightweight filling strip to obtain a floor slab; Step 8: Demoulding, separating the two end plates and the two side plates from the floor slab.

8. A mold, characterized in that: Used to realize the production process of the prestressed dense-ribbed sandwich floor as described in claim 5, the mold includes two end plates and two side plates, the two end plates and the two side plates are combined to form a rectangular mold, the two end plates are arranged in parallel, the two side plates are arranged in parallel, the end plates and the side plates are arranged vertically, and a plurality of process holes are opened on the side plates, and the positions of the process holes correspond to the grooves of the lightweight filling strips.

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