Precast concrete structure with integrated beam and slab and construction method

Abstract

The application discloses a kind of beam slab integrated prefabricated concrete structure and construction method, prefabricated concrete structure includes prefabricated beam slab unit, prefabricated composite frame beam, concrete column and cast-in-place concrete surface layer;The concrete column array distribution is provided with support piece A, B on its upper end;The two ends of the prefabricated composite frame beam are respectively erected on the upper end of adjacent concrete column, and the prefabricated composite frame beam is provided with support piece C;The prefabricated beam slab unit is arranged between two parallel prefabricated composite frame beams;The top surface of the prefabricated beam slab unit, the prefabricated composite frame beam and each beam column node cast-in-place concrete form cast-in-place concrete surface layer.The construction method is first completed the array construction of concrete column;Afterwards, prefabricated beam slab unit and prefabricated composite frame beam are orderly installed, and finally, cast-in-place concrete surface layer is poured.The application has the advantages that the prefabricated concrete structure on-site construction is free of support and free of mold, which can significantly speed up the construction speed and significantly reduce the on-site construction cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of building technology, in particular to a beam-slab integrated prefabricated concrete structure and a construction method. BACKGROUND

[0002] In recent years, prefabricated buildings have developed rapidly in China. The Guiding Opinions on Vigorously Developing Prefabricated Buildings further clarifies that green buildings and building materials will be actively promoted in the future, and it is expected that prefabricated buildings will account for 30% of new buildings in about 10 years.

[0003] When the existing prefabricated concrete buildings use composite floors and prefabricated composite beams, supports are usually set during the construction phase. When the floor height is large, the support system is complex and expensive. Therefore, in order to speed up the construction speed and reduce the project measure cost, it has great practical value to realize the support-free and form-free prefabricated structure construction. SUMMARY

[0004] The purpose of the present application is to provide a beam-slab integrated prefabricated concrete structure and a construction method that can significantly improve the construction speed and reduce the cost.

[0005] The purpose of the present application is achieved by the following technical solutions:

[0006] A beam-slab integrated prefabricated concrete structure, comprising a prefabricated beam-slab unit, a prefabricated composite frame beam, a concrete column, and a cast-in-place concrete surface layer; the concrete columns are arrayed and distributed, and their upper ends are provided with a support A for supporting the prefabricated beam-slab unit and a support B for supporting the prefabricated composite frame beam; the prefabricated composite frame beam is a transverse strip-shaped beam, and its two ends are respectively erected on the upper ends of the adjacent concrete columns on the left and right sides, and the front and rear side walls of the prefabricated composite frame beam are provided with a support C; the prefabricated beam-slab unit comprises a flat plate, and the left and right side edges of the flat plate are respectively provided with downward and forward and backward extending flanges, the prefabricated beam-slab unit is arranged between two parallel prefabricated composite frame beams, and its flanges are erected on the upper ends of the concrete columns or the supports C on the opposite sides of the two parallel prefabricated composite frame beams; the top surface of the prefabricated beam-slab unit, the top surface of the prefabricated composite frame beam, and the beam-column joints between the prefabricated beam-slab unit, the prefabricated composite frame beam, and the concrete columns form a cast-in-place concrete surface layer.

[0007] The application discloses a construction method of a beam-slab integrated prefabricated concrete structure, and belongs to the field of prefabricated concrete structures.

[0008] Compared with the prior art, the application has the following advantages:

[0009] 1. The beam-slab integrated prefabricated concrete structure can realize support-free and form-free on-site construction of the prefabricated concrete structure, can significantly accelerate the construction speed, and can significantly reduce the on-site construction cost.

[0010] 2. The beam-slab integrated prefabricated concrete structure can significantly reduce the number of prefabricated concrete components, reduce the joint on site, and can accelerate the construction speed.

[0011] 3. In the application, the prefabricated beam-slab units are arranged between the prefabricated composite frame beams, the flanges at the connection positions of the two prefabricated beam-slab units and the cast-in-situ concrete surface layer can replace the secondary beams in the conventional design, the prefabricated cost can be significantly reduced under the premise that the stress performance is not reduced.

[0012] 4. The combination of the supporting piece C of the prefabricated composite frame beam and the flange of the prefabricated beam-slab unit can reliably transmit the shear force, and has no influence on the indoor decoration effect.

[0013] 5. The flanges at the connection positions of the two prefabricated beam-slab units and the cast-in-situ concrete surface layer can replace the frame beams in the conventional design, the prefabricated cost can be significantly reduced under the premise that the stress performance is not reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 FIG. 1 is a structural schematic diagram of an embodiment of the beam-slab integrated prefabricated concrete structure.

[0015] Figure 2 FIG. 2 is a structural schematic diagram of an embodiment of the prefabricated beam-slab unit.

[0016] Figure 3 FIG. 3 is a structural schematic diagram of another embodiment of the prefabricated beam-slab unit.

[0017] Figure 4 FIG. 4 is a partial enlarged schematic diagram of FIG. 1. Figure 3

[0018] Figure 5 ​is a structural schematic diagram of a connection between the prefabricated beam slab unit.

[0019] Figure 6 is a structural schematic diagram of a concrete column.

[0020] Figure 7 is a structural schematic diagram of a prefabricated composite frame beam.

[0021] Figure 8 is a structural schematic diagram of a supporting member C.

[0022] Figure 9 is a structural schematic diagram of a prefabricated concrete structure of beam slab integration (step 1).

[0023] Figure 10 is a structural schematic diagram of a prefabricated concrete structure of beam slab integration (step 2).

[0024] Figure 11 is a structural schematic diagram of a prefabricated concrete structure of beam slab integration (step 3).

[0025] Figure 12 is a structural schematic diagram of a prefabricated concrete structure of beam slab integration (step 4).

[0026] Label explanation: 1 prefabricated beam slab unit, 1-1 flat plate, 1-2 flange, 1-3 groove A, 1-4 longitudinal steel A, 1-5 shear key groove A, 1-6 truss reinforcement, 2 prefabricated composite frame beam, 2-1 groove B, 2-2 longitudinal steel B, 2-3 shear key groove B, 3 concrete column, 3-1 supporting member A, 3-2 supporting member B, 4 cast-in-place concrete surface layer, 4-1 reinforcing hoop, 4-2 beam surface longitudinal reinforcement, 5 supporting member C, 5-1 anchoring plate, 5-2 anchoring steel, 5-3 U-shaped support plate. DETAILED DESCRIPTION

[0027] The content of the application will be described in detail below in combination with the drawings and examples of the specification:

[0028] As Figures 1-12 shown is an embodiment schematic diagram of a prefabricated concrete structure of beam slab integration and a construction method provided by the application.

[0029] A prefabricated concrete structure of beam slab integration, comprising a prefabricated beam slab unit 1, a prefabricated composite frame beam 2, a concrete column 3, and a cast-in-place concrete surface layer 4, wherein the above components are all made of reinforced concrete.

[0030] The concrete columns 3 are arrayed and distributed, and the upper ends thereof are provided with supporting members A 3-1 for supporting the prefabricated beam slab unit 1 and supporting members B 3-2 for supporting the prefabricated composite frame beam 2;

[0031] The concrete columns 3 in this embodiment are arranged in a rectangular array, and the steel bars in the concrete columns 3 extend into the beam-column joints.

[0032] The prefabricated composite frame beam 2 is a transverse strip-shaped beam, and the two ends of the prefabricated composite frame beam 2 are respectively arranged on the upper ends of the adjacent concrete columns 3 on the left and right sides, and the front and rear side walls of the prefabricated composite frame beam 2 are provided with supporting members C5.

[0033] The prefabricated beam-slab unit 1 is in the shape of an inverted groove, and includes a flat plate 1-1, and the left and right side edges of the flat plate 1-1 are respectively provided with downward and front-rear extending flanges 1-2. The prefabricated beam-slab unit 1 is arranged between two parallel prefabricated composite frame beams 2, and the flanges 1-2 are arranged on the upper ends of the concrete columns 3 or the supporting members C5 on the opposite sides of the two parallel prefabricated composite frame beams 2.

[0034] The top surface of the prefabricated beam-slab unit 1, the top surface of the prefabricated composite frame beam 2, and the beam-column joints between the prefabricated beam-slab unit 1, the prefabricated composite frame beam 2 and the concrete columns 3 are formed into a cast-in-place concrete surface layer 4.

[0035] The left and right flanges of the adjacent prefabricated beam-slab units 1 and the cast-in-place concrete surface layer are combined into a composite beam with local vertical joints (see 5).

[0036] Grooves A1-3 are arranged at the corners of the top of the flanges 1-2, and the depth of the grooves A1-3 can be determined according to stress calculation.

[0037] Longitudinal steel bars A1-4 are arranged in the interior of part of the flanges 1-2, and the longitudinal steel bars A1-4 extend into the beam-column joints; and shear key grooves A1-5 are arranged at the end of the flanges 1-2 located in the beam-column joints.

[0038] Two-way steel mesh is arranged in the flat plate 1-1, the top surface of the flat plate 1-1 is a rough surface, and truss steel bars 1-6 perpendicular to the flanges 1-2 are arranged on the top surface of the flat plate 1-1.

[0039] The prefabricated composite frame beam 2 is in the shape of a rectangle, and the top surface of the prefabricated composite frame beam 2 is provided with grooves B2-1 extending along the length direction of the prefabricated composite frame beam 2.

[0040] Stirrups A extending out of the flanges 1-2 are arranged in the interior of the flanges 1-2; longitudinal steel bars B2-2 and stirrups B are arranged in the interior of the prefabricated composite frame beam 2, and the top surface of the prefabricated composite frame beam 2 is a rough surface; and shear key grooves B2-3 are arranged at the two ends of the prefabricated composite frame beam 2.

[0041] Strengthening stirrups 4-1 and beam surface longitudinal steel bars 4-2 are arranged in the cast-in-place concrete surface layer 4, and the strengthening stirrups 4-1 and the beam surface longitudinal steel bars 4-2 are located on the upper side of the flanges 1-2 connecting part of the adjacent prefabricated composite frame beams 2.

[0042] The supporting piece C5 includes an anchoring plate 5-1, an anchoring steel bar 5-2, and a U-shaped supporting plate 5-3; the anchoring steel bar 5-2 is arranged on the inner side of the anchoring plate 5-1, and the anchoring plate 5-1 and the anchoring steel bar 5-2 are integrally poured and formed with the prefabricated composite frame beam 2; the U-shaped supporting plate 5-3 is arranged on the outer side of the anchoring plate 5-1, and the notch of the U-shaped supporting plate 5-3 faces upward, and the groove profile can simultaneously insert the flanges 1-2 of two adjacent prefabricated beam plate units 1.

[0043] The supporting piece A3-1 and the supporting piece B3-2 are both steel brackets, and the two steel brackets are respectively locked on the side walls of the concrete columns 3.

[0044] A construction method of a prefabricated concrete structure of beam-plate integration, which comprises the following steps:

[0045] S1. Complete the array construction of the concrete columns 3;

[0046] S2. According to the height of the prefabricated beam plate unit 1 and the prefabricated composite frame beam 2, connect the supporting piece A3-1 and the supporting piece B3-2 on the concrete column 3;

[0047] S3. Place the prefabricated composite frame beam 2 on the two concrete columns 3, and support the end of the prefabricated composite frame beam 2 on the supporting piece B3-2;

[0048] S4. Place the prefabricated beam plate unit 1 between the prefabricated composite frame beams 2, and support one side flange 1-2 of the prefabricated beam plate unit 1 on the supporting piece A3-1 or the supporting piece C, and support the other side flange 1-2 on the supporting piece C;

[0049] S5. Pour the cast-in-place concrete surface layer 4.

Claims

1. A precast concrete structure integrating beams and slabs without support or formwork, characterized in that: It includes precast beam-slab units (1), precast composite frame beams (2), concrete columns (3), and cast-in-place concrete surface layer (4); The concrete columns (3) are arranged in an array, with a support A (3-1) for supporting the precast beam-slab unit (1) and a support B (3-2) for supporting the precast composite frame beam (2) at the upper end. The steel bars in the concrete columns (3) extend into the beam-column joint. The precast composite frame beam (2) is a transverse strip beam with its two ends respectively mounted on the upper ends of the adjacent concrete columns (3) on the left and right sides, and the front and rear side walls of the precast composite frame beam (2) are provided with support members C (5). The precast beam-slab unit (1) includes a flat plate (1-1), and the left and right sides of the flat plate (1-1) are respectively provided with downward and forward-backward extending flanges (1-2). The precast beam-slab unit (1) is set between two parallel precast composite frame beams (2), and its flanges (1-2) are supported on the upper end of the concrete column (3) or on the opposite side of the two parallel precast composite frame beams (2) by the support member C (5). The top surface of the precast beam-slab unit (1), the top surface of the precast composite frame beam (2), and the cast-in-place concrete at the beam-column joint between the precast beam-slab unit (1), the precast composite frame beam (2), and the concrete column (3) form a cast-in-place concrete surface layer (4). A groove A (1-3) is provided at the corner of the top of the flange (1-2); The flange (1-2) is provided with longitudinal steel bar A (1-4) inside, and the longitudinal steel bar A (1-4) extends into the beam-column joint; and a shear keyway A (1-5) is provided at the end of the flange (1-2) located at the beam-column joint. The flange (1-2) is provided with stirrups A extending upward from the flange (1-2); the cast-in-place concrete surface layer (4) is provided with reinforcing stirrups (4-1) and beam longitudinal bars (4-2), and the reinforcing stirrups (4-1) and beam longitudinal bars (4-2) are located on the upper side of the flange (1-2) connection of the adjacent precast composite frame beam (2); This allows the left and right flanges of adjacent precast beam-slab units (1) to be combined with the cast-in-place concrete surface layer to form a composite beam with local vertical joints. The supporting component C (5) includes an anchor plate (5-1), an anchoring steel bar (5-2), and a U-shaped support plate (5-3). The anchoring steel bar (5-2) is located on the inner side of the anchor plate (5-1), and the anchor plate (5-1), the anchoring steel bar (5-2), and the precast composite frame beam (2) are integrally cast. The U-shaped support plate (5-3) is located on the outer side of the anchor plate (5-1), with the groove of the U-shaped support plate (5-3) facing upwards. The inner contour of the groove can simultaneously insert the flanges (1-2) of two adjacent precast beam and slab units (1).

2. The precast concrete structure with integrated beam and slab design without support or formwork as described in claim 1, characterized in that: The plate (1-1) is provided with a two-way steel mesh, and the top surface of the plate (1-1) is a rough surface; and the top surface of the plate (1-1) is provided with an array of truss steel bars (1-6) perpendicular to the flange (1-2).

3. The precast concrete structure with integrated beam and slab design without support or formwork as described in claim 1, characterized in that: The prefabricated composite frame beam (2) has a rectangular cross section, and a groove B (2-1) extending along its length is provided on the top surface of the prefabricated composite frame beam (2).

4. The precast concrete structure with integrated beam and slab design without support or formwork as described in claim 1, characterized in that: The precast composite frame beam (2) is provided with longitudinal steel bars B (2-2) and stirrups B inside, and its top surface is rough; and the two ends of the precast composite frame beam (2) are provided with shear keyways B (2-3).

5. The precast concrete structure with integrated beam and slab design without support or formwork as described in claim 1, characterized in that: Both the support A (3-1) and the support B (3-2) are steel brackets, and the two steel brackets are locked to the side wall of the concrete column (3).

6. The construction method of a precast concrete structure integrating beams and slabs without support or formwork as described in claim 1, characterized in that, It includes the following steps: S1. Complete the array construction of concrete columns (3); S2. Based on the height of the precast beam-slab unit (1) and the precast composite frame beam (2), connect the support A (3-1) and the support B (3-2) on the concrete column (3). S3. The precast composite frame beam (2) is placed on two concrete columns (3), and the ends of the precast composite frame beam (2) are supported on the support member B (3-2); S4. The precast beam-slab unit (1) is placed between the precast composite frame beams (2). One side flange (1-2) of the precast beam-slab unit (1) is supported on the support A (3-1) or the support C (5), and the other side flange (1-2) is supported on the support C (5). S5. Pour the cast-in-place concrete surface layer (4).

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