Fabricated single-layer prefabricated composite floor slab

Abstract

The invention relates to the technical field of single-layer prefabricated composite floor slabs, and discloses an assembly type single-layer prefabricated composite floor slab which comprises a prefabricated slab layer, a shrinkage plate layer is arranged in the middle of the bottom of the prefabricated slab layer, and a shrinkage cavity is formed between the outer side of the shrinkage plate layer and the bottom of the prefabricated slab layer; according to the assembly type single-layer prefabricated composite floor slab, the shrinkage cavity is formed in the edge position of the bottom of the prefabricated slab layer, and meanwhile, the reserved cavity is formed from the edge of the shrinkage cavity to the interior of the shrinkage slab layer, so that a supporting slab layer matched with the bottom of the shrinkage cavity is formed in the cast-in-place slab layer in the concrete grouting process; and a connecting column for grouting and solidifying the interior of the reserved cavity is formed on the inner side of the supporting plate layer, and a supporting and lifting structure is formed for the whole bottom of the prefabricated plate layer, so that the structure between the prefabricated plate layer and the cast-in-place plate layer is kept stable, and the phenomenon that the prefabricated plate layer and the cast-in-place plate layer are separated is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of single-layer prefabricated composite floor slabs, and more specifically, to an assembled single-layer prefabricated composite floor slab. Background Art

[0002] A single-layer precast composite slab refers to a slab structure composed of a precast slab and a cast-in-place concrete layer. The precast slab is usually made of reinforced concrete and is prefabricated in the factory. It has high strength and dimensional accuracy. There are many types of precast slabs, such as hollow slabs, solid slabs, etc., which are selected according to project needs. After the precast slabs are laid, a layer of cast-in-place concrete is poured on them to connect the precast slabs and enhance the overall stiffness and bearing capacity of the slab. The cast-in-place layer is usually thinner, but also contains necessary steel bars.

[0003] In the existing single-layer precast slab structure, when the precast slab layer and the cast-in-place slab layer are poured with concrete, the two adjacent precast slabs are mainly connected by a T-shaped cast-in-place structure formed by steel bars and concrete. The cast-in-place slab layer generates an upward suspension force on the precast slab layer through the supporting force generated by the steel bars, thereby maintaining the structural stability of the precast slab layer. After being subjected to force, the steel bars will deform to a certain extent. Therefore, during long-term use, there will be separation between the precast slab layer and the cast-in-place slab layer, thereby affecting the structural safety of the composite floor slab. Summary of the invention

[0004] The present invention provides an assembled single-layer prefabricated composite floor slab, which solves the technical problem of deformation separation between the prefabricated board layer and the cast-in-place board layer in the existing composite floor slab in the related art.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] An assembled single-layer prefabricated composite floor comprises a prefabricated board layer, a shrinkage board layer is arranged in the middle of the bottom of the prefabricated board layer, a shrinkage cavity is arranged between the outer side of the shrinkage board layer and the bottom of the prefabricated board layer, reserved cavities extending into the interior of the shrinkage board layer are evenly arranged at the edge position of the shrinkage board layer, the reserved cavities located at two adjacent edges of the shrinkage board layer cross to form a connecting cavity, and a cast-in-place board layer is cast on the top of the prefabricated board layer.

[0007] As a further optimization scheme of the present invention, a first steel frame layer is evenly laid inside the prefabricated plate layer, the first steel frame layer is laid in a cross-distribution, and both ends of the first steel frame layer extend to the outside of the shrinkage plate layer respectively, and the center line of the first steel frame layer coincides with the center line of the reserved cavity.

[0008] As a further optimization scheme of the present invention, a plurality of groups of three-dimensional support steel frames are evenly laid on the top of the first steel frame layer. The three-dimensional support steel frames are equilateral triangle steel frame structures, in which a plurality of groups of quadrilateral support columns are welded at equal intervals, and the top ends of the quadrilateral support columns are gathered toward the center position.

[0009] As a further optimization scheme of the present invention, the bottom of the three-dimensional support steel frame is embedded in the interior of the prefabricated panel layer, the top of the three-dimensional support steel frame is exposed at the top position of the prefabricated panel layer, and the vertical height of the three-dimensional support steel frame embedded in the interior of the prefabricated panel layer is one third of the overall vertical height of the three-dimensional support steel frame.

[0010] As a further optimization scheme of the present invention, a wire box is arranged between the quadrilateral cavity formed by the cross-intersection of the first steel frame layer, a supporting base plate connected to the first steel frame layer is arranged at the bottom of the wire box, connecting holes are arranged at both ends of the supporting base plate, the first steel frame layer and the connecting hole are bound by steel wire, four groups of adjusting bolts are arranged on the top of the supporting base plate, the outer sides of the adjusting bolts jointly support the wire box, the outer sides of the adjusting bolts are provided with first nuts and second nuts which are compatible with the bottom of the wire box, and the first nuts and the second nuts are distributed at the upper and lower ends of the bottom of the connecting hole.

[0011] As a further optimization scheme of the present invention, a wiring tube connected to the outside is arranged on the outside of the wire box, and the bottom of the wiring tube is located at the top of the three-dimensional supporting steel frame. A water pipe is laid in the middle of the three-dimensional supporting steel frame, and the position height of the top of the water pipe is lower than the position height of the bottom of the wiring tube.

[0012] As a further optimization scheme of the present invention, a cast-in-place slab layer is cast on the top of the prefabricated slab layer, and the cast-in-place slab layer solidifies at a position close to two adjacent groups of shrinkage cavities to form a supporting slab layer. The supporting slab layer is an "I"-shaped structure, and the inner side of the supporting slab layer is evenly provided with connecting columns extending into the reserved cavity, and two adjacent groups of connecting columns located on the inner side of the supporting slab layer are cross-filled and adapted to the connecting cavity.

[0013] As a further optimization scheme of the present invention, the cast-in-place slab layer, supporting slab layer and connecting columns are cast-in-place concrete solidification structures, all of which are one-piece molded structures. The top of the wire box is flush with the top surface of the cast-in-place slab layer, and the wiring pipes and water pipes are all pre-buried inside the cast-in-place slab layer.

[0014] As a further optimization solution of the present invention, the vertical thickness of the prefabricated board layer is D 2 , the vertical thickness of the shrinkage plate layer is D 3 , the D 3 :D 2 The value of is 1 to 1.5, and (D2 +D 3 )>60mm, the distance from the outer edge of the shrinkage board layer to the outer edge of the prefabricated board layer is D 1 , where 100mm<D 1 <200mm, the thickness of the cast-in-place slab from the top surface of the prefabricated slab to the top surface of the cast-in-place slab is D 4 , where D 4 >60mm.

[0015] As a further optimization scheme of the present invention, the length of the reserved cavity is 200mm~300mm, the diameter of the circular hole of the reserved cavity is 20mm~30mm, and the spacing between two adjacent groups of reserved cavities is 200mm~500mm. Through the structural design of the reserved cavity, the structural dimensions of the corresponding connecting column are made the same as the reserved cavity.

[0016] The beneficial effects of the present invention are as follows: the present invention provides a shrinkage cavity at the edge position of the bottom of the prefabricated slab layer, and at the same time provides a reserved cavity from the edge of the shrinkage cavity to the inside of the shrinkage slab layer, so that during the process of concrete grouting of the cast-in-place slab layer, a supporting slab layer that is compatible with the bottom of the shrinkage cavity is formed, and at the same time, a connecting column that is grouted and solidified into the reserved cavity is formed on the inner side of the supporting slab layer, and a supporting and lifting structure is formed for the bottom of the entire prefabricated slab layer through the supporting slab layer. At the same time, a stable connecting structure is formed through the cooperation of the connecting column and the reserved cavity, so that the structure between the prefabricated slab layer and the cast-in-place slab layer remains stable, and separation between the prefabricated slab layer and the cast-in-place slab layer is prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an enlarged schematic diagram of the composite structure of the composite floor in the present invention;

[0018] Figure 2 It is an enlarged schematic diagram of the composite floor separation structure in the present invention;

[0019] Figure 3 It is an enlarged cross-sectional view of the structure of the cast-in-place slab layer in the present invention;

[0020] Figure 4 It is an enlarged cross-sectional view of the structure at the prefabricated board layer in the present invention;

[0021] Figure 5 It is an enlarged schematic diagram of the connection structure at the prefabricated board layer in the present invention;

[0022] Figure 6 It is a bottom view of the structure at the prefabricated board layer in the present invention;

[0023] Figure 7 It is a front view of the structure at the prefabricated board layer in the present invention;

[0024] Figure 8 yes Figure 7 A schematic diagram of the structure at A;

[0025] Fig. 9 It is a front view of the structure of the cast-in-place slab layer in the present invention;

[0026] Fig.10 It is an enlarged schematic diagram of the structure of the wire box assembly of the present invention.

[0027] In the figure: 1. Prefabricated slab layer; 2. First steel frame layer; 3. Wiring pipe; 4. Water pipe; 5. Junction box; 6. Cast-in-place slab layer; 7. Three-dimensional supporting steel frame; 8. Shrinkage slab layer; 9. Support slab layer; 10. Shrinkage cavity; 11. Adjusting bolt; 12. First nut; 13. Second nut; 14. Support base plate; 15. Connection hole; 16. Reserved cavity; 17. Connection cavity; 18. Connection column. DETAILED DESCRIPTION

[0028] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0029] Example 1

[0030] like Figures 1 to 6 As shown, an assembled single-layer prefabricated composite floor comprises a prefabricated board layer 1, a shrinkage board layer 8 is arranged in the middle of the bottom of the prefabricated board layer 1, a shrinkage cavity 10 is arranged between the outer side of the shrinkage board layer 8 and the bottom of the prefabricated board layer 1, the shrinkage cavity 10 is a structure that shrinks inwardly toward the bottom of the prefabricated board layer 1, and forms an annular structure around the bottom of the prefabricated board layer 1, and reserved cavities 16 extending to the inside of the shrinkage board layer 8 are evenly arranged at the edge position of the shrinkage board layer 8, and the reserved cavities 16 located at two adjacent sides of the shrinkage board layer 8 cross to form a connecting cavity 17, and the distance between the two groups of reserved cavities 16 close to the edge of the shrinkage board layer 8 is half of the distance between the two adjacent groups of reserved cavities 16 on the same side, and a cast-in-place board layer 6 is cast on the top of the prefabricated board layer 1.

[0031] The first steel frame layer 2 is evenly laid inside the prefabricated plate layer 1, and the first steel frame layer 2 is laid in a cross-shaped distribution. The two ends of the first steel frame layer 2 extend to the outside of the shrinkage plate layer 8 respectively, and the center line of the first steel frame layer 2 coincides with the center line of the reserved cavity 16.

[0032] Several groups of three-dimensional support steel frames 7 are evenly laid on the top of the first steel frame layer 2. The three-dimensional support steel frames 7 are equilateral triangle steel frame structures, and several groups of quadrilateral support columns are welded at equal intervals in the middle, and the top ends of the quadrilateral support columns are gathered toward the center.

[0033] The bottom of the three-dimensional support steel frame 7 is embedded in the interior of the prefabricated panel layer 1, and the top of the three-dimensional support steel frame 7 is exposed at the top position of the prefabricated panel layer 1. The vertical height of the three-dimensional support steel frame 7 embedded in the interior of the prefabricated panel layer 1 is one third of the overall vertical height of the three-dimensional support steel frame 7.

[0034] A wire box 5 is arranged between the quadrilateral cavities formed by the cross of the first steel frame layer 2, a supporting base plate 14 connected to the first steel frame layer 2 is arranged at the bottom of the wire box 5, connecting holes 15 are arranged at both ends of the supporting base plate 14, the first steel frame layer 2 and the connecting holes 15 are bound by steel wires, four groups of adjusting bolts 11 are arranged on the top of the supporting base plate 14, the outer sides of the adjusting bolts 11 jointly support the wire box 5, the outer sides of the adjusting bolts 11 are arranged with the first nut 12 and the second nut 13 which are adapted to the bottom of the wire box 5, and the first nut 12 and the second nut 13 are distributed at the upper and lower ends of the bottom of the connecting hole 15.

[0035] A wiring pipe 3 connected to the outside is arranged on the outside of the junction box 5. The bottom of the wiring pipe 3 is located at the top of the three-dimensional supporting steel frame 7. A water pipe 4 is laid in the middle of the three-dimensional supporting steel frame 7. The top of the water pipe 4 is located at a lower height than the bottom of the wiring pipe 3.

[0036] A cast-in-place slab layer 6 is cast on the top of the prefabricated slab layer 1. The cast-in-place slab layer 6 solidifies at a position between two adjacent groups of shrinkage cavities 10 to form a supporting slab layer 9. The supporting slab layer 9 is an "I"-shaped structure. The inner side of the supporting slab layer 9 is evenly provided with connecting columns 18 extending into the reserved cavity 16. Two adjacent groups of connecting columns 18 located on the inner side of the supporting slab layer 9 are cross-filled and adapted to the connecting cavity 17.

[0037] The cast-in-place slab 6, supporting slab 9 and connecting column 18 are cast-in-place concrete solidified structures, all of which are integrally formed structures. The top of the junction box 5 is flush with the top surface of the cast-in-place slab 6, and the wiring pipe 3 and water pipe 4 are all pre-buried inside the cast-in-place slab 6.

[0038] like Figure 3 , Figure 4 , Figures 7 to 10 As shown, the vertical thickness of the prefabricated board layer 1 is D 2 , the vertical thickness of the shrinkage board layer 8 is D 3 , the D 3 :D 2 The value of is 1 to 1.5, and (D 2 +D 3)>60mm, the distance between the outer edge of the shrinkage board layer 8 and the outer edge of the prefabricated board layer 1 is D 1 , where 100mm<D 1 <200mm, the thickness of the cast-in-place slab layer 6 from the top surface of the prefabricated slab layer 1 to the top surface of the cast-in-place slab layer 6 is D 4 , where D 4 >60mm.

[0039] The length of the reserved cavity 16 is 200mm to 300mm, the diameter of the circular hole of the reserved cavity 16 is 20mm to 30mm, and the spacing between two adjacent groups of reserved cavities 16 is 200mm to 500mm. Through the structural design of the reserved cavity 16, the structural dimensions of the corresponding connecting column 18 are the same as those of the reserved cavity 16.

[0040] The use process of the assembled single-layer prefabricated composite floor proposed in this embodiment is as follows: when the composite floor is produced, the overall structure of the prefabricated board layer 1 is first produced in the factory, and a circular shrinkage cavity 10 structure is formed at the edge position of the bottom of the prefabricated board layer 1 by customizing the mold structure. The bottom of the prefabricated board layer 1 is a shrinkage board layer 8 structure. At the same time, when the first steel frame layer 2 is pre-buried, a structural cavity of a reserved cavity 16 is formed at the edge position of the first steel frame layer 2 and the shrinkage board layer 8, and the structural cavity extends to the outside of the shrinkage cavity 10;

[0041] At the same time, the two groups of reserved cavities 16 at the outer edge positions of the two adjacent groups of shrinkage board layers 8 cross to form a cross structure of connecting cavities 17. When the first steel frame layer 2 is laid, the connecting holes 15 on the surface of the supporting bottom plate 14 are connected to the first steel frame layer 2, so as to pre-embed the entire wire box 5;

[0042] Then, the prefabricated board layer 1 is hoisted as a whole to the position where it needs to be installed, a steel bar layer is laid on the top of the prefabricated board layer 1, the position height of the first nut 12 and the second nut 13 are adjusted, and then the position height of the wire box 5 is adjusted so that the position height of the wire box 5 is consistent with the top surface position height of the cast-in-place board layer 6;

[0043] Furthermore, connecting steel bars are laid between two adjacent groups of precast slab layers 1, and the connecting steel bars connect the two adjacent groups of first steel bar frame layers 2, so that the two adjacent groups of first steel bar frame layers 2 form a whole, and at the same time, the steel bars laid on the top of the precast slab layer 1 are all inserted from the middle of the three-dimensional support steel frame 7, so that the steel bars laid on the top of the precast slab layer 1 form an upward support force for the three-dimensional support steel frame 7 when the concrete is poured in situ;

[0044] By pre-buried wiring box 5 and water pipe 4, the horizontal position height of wiring pipe 3 connected to wiring box 5 is higher than the horizontal position height of water pipe 4, so that the intersection position of wiring pipe 3 and water pipe 4 is staggered, and the intersection of the two in the existing structure is optimized. The concave transfer method is adopted, so as to ensure the convenience of threading wiring pipe 3 in the later stage, and also ensure the smoothness of water flow in water pipe 4;

[0045] When the steel bars, wiring pipes 3, water pipes 4 and junction boxes 5 on the top of the precast slab 1 are all laid, concrete is poured between the precast slabs 1 and then solidifies to form a cast-in-place slab 6. Through the flow of cast-in-place concrete, the concrete is filled into the reserved cavity 16 and then solidifies to form a connecting column 18. At the same time, the concrete fills the area of ​​the shrinkage cavity 10 and then solidifies to form a supporting slab 9. The supporting effect of the supporting slab 9 on the bottom edge of the precast slab 1 forms an upward supporting force for the precast slab 1. Combined with the connecting pulling force of the steel bars, the separation between the top of the precast slab 1 and the bottom of the cast-in-place slab 6 is avoided, thereby improving the stability of the composite floor structure.

[0046] The specific implementation methods of this embodiment are described above, but this embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms inspired by this embodiment, all of which are within the protection of this embodiment.

Claims

1. An assembled single-layer prefabricated composite floor slab, characterized in that: The invention comprises a prefabricated board layer (1), wherein a shrinkage board layer (8) is arranged in the middle of the bottom of the prefabricated board layer (1), a shrinkage cavity (10) is arranged between the outer side of the shrinkage board layer (8) and the bottom of the prefabricated board layer (1), reserved cavities (16) extending into the interior of the shrinkage board layer (8) are evenly arranged at the edge of the shrinkage board layer (8), and the reserved cavities (16) located at two adjacent edges of the shrinkage board layer (8) cross to form a connecting cavity (17), and a cast-in-place board layer (6) is cast in-place on the top of the prefabricated board layer (1).

2. The assembled single-layer prefabricated composite floor slab according to claim 1, characterized in that: A first steel frame layer (2) is evenly laid inside the prefabricated plate layer (1), the first steel frame layer (2) is laid in a cross-shaped distribution, and both ends of the first steel frame layer (2) extend to the outside of the shrinkage plate layer (8), and the center line of the first steel frame layer (2) coincides with the center line of the reserved cavity (16).

3. The assembled single-layer prefabricated composite floor slab according to claim 2, characterized in that: A plurality of groups of three-dimensional support steel frames (7) are evenly laid on the top of the first steel frame layer (2), and the three-dimensional support steel frames (7) are equilateral triangle steel frame structures, wherein a plurality of groups of quadrilateral support columns are welded at equal intervals in the middle, and the top ends of the quadrilateral support columns are gathered towards the center.

4. The assembled single-layer prefabricated composite floor slab according to claim 3, characterized in that: The bottom of the three-dimensional support steel frame (7) is embedded in the interior of the prefabricated panel layer (1), the top of the three-dimensional support steel frame (7) is exposed at the top position of the prefabricated panel layer (1), and the vertical height of the three-dimensional support steel frame (7) embedded in the interior of the prefabricated panel layer (1) is one third of the overall vertical height of the three-dimensional support steel frame (7).

5. The assembled single-layer prefabricated composite floor slab according to claim 2, characterized in that: A wire box (5) is arranged between the quadrilateral cavities formed by the cross-intersection of the first steel frame layer (2); a supporting base plate (14) connected to the first steel frame layer (2) is arranged at the bottom of the wire box (5); both ends of the supporting base plate (14) are provided with connection holes (15); the first steel frame layer (2) and the connection holes (15) are bound by steel wires; four groups of adjusting bolts (11) are arranged on the top of the supporting base plate (14); the outer sides of the adjusting bolts (11) jointly support the wire box (5); the outer sides of the adjusting bolts (11) are provided with a first nut (12) and a second nut (13) that are mutually compatible with the bottom of the wire box (5); and the first nut (12) and the second nut (13) are distributed at the upper and lower ends of the bottom of the connection hole (15).

6. The assembled single-layer prefabricated composite floor slab according to claim 5, characterized in that: A wiring tube (3) communicating with the outside is arranged on the outside of the wire box (5); the bottom of the wiring tube (3) is located at the top of the three-dimensional support steel frame (7); a water pipe (4) is laid in the middle of the three-dimensional support steel frame (7); the top of the water pipe (4) is at a lower height than the bottom of the wiring tube (3).

7. The assembled single-layer prefabricated composite floor slab according to claim 1, characterized in that: A cast-in-place plate layer (6) is cast in-place on the top of the prefabricated plate layer (1), and the cast-in-place plate layer (6) solidifies at a position close to the position between two adjacent groups of shrinkage cavities (10) to form a support plate layer (9), and the support plate layer (9) is an "I"-shaped structure. The inner side of the support plate layer (9) is evenly provided with connecting columns (18) extending into the reserved cavity (16), and two adjacent groups of connecting columns (18) located on the inner side of the support plate layer (9) are cross-filled and matched with the connecting cavity (17).

8. The assembled single-layer prefabricated composite floor slab according to claim 6, characterized in that: The cast-in-place slab layer (6), the supporting slab layer (9), and the connecting column (18) are cast-in-place concrete solidified structures, and are all integrally formed structures; the top of the wire box (5) is flush with the top surface of the cast-in-place slab layer (6); and the wiring pipe (3) and the water pipe (4) are all pre-buried inside the cast-in-place slab layer (6).

9. The assembled single-layer prefabricated composite floor slab according to claim 1, characterized in that: The vertical thickness of the prefabricated board layer (1) is D2, the vertical thickness of the shrinkage board layer (8) is D3, the value of D3:D2 is 1 to 1.5, and (D2+D3)>60mm, the distance from the outer edge of the shrinkage board layer (8) to the outer edge of the prefabricated board layer (1) is D1, wherein 100mm<D1<200mm, and the thickness of the cast-in-place board layer (6) from the top surface of the prefabricated board layer (1) to the top surface of the cast-in-place board layer (6) is D4, wherein D4>60mm.

10. The assembled single-layer prefabricated composite floor slab according to claim 1, characterized in that: The length of the reserved cavity (16) is 200 mm to 300 mm, the diameter of the circular hole of the reserved cavity (16) is 20 mm to 30 mm, and the spacing between two adjacent groups of reserved cavities (16) is 200 mm to 500 mm. Through the structural design of the reserved cavity (16), the structural dimensions of the corresponding connecting column (18) are the same as those of the reserved cavity (16).

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