Combined frame and construction process of composite beam-slab integration

Abstract

This invention relates to the field of building construction technology, specifically to a composite frame and construction process for an integrated composite beam-slab structure. The composite frame includes precast beam-slab units, independent precast beams, precast columns, node connecting reinforcement, and a post-cast concrete layer. The precast beam-slab units are precast from composite slabs and composite beams located on at least one side of the composite slab. The top of the precast columns is provided with a support portion and outwardly extending reinforcing bars; the support portion supports the precast beam-slab units and independent precast beams. Node grooves are provided at the ends of the independent precast beams and / or the composite beams of the precast beam-slab units, and node connecting reinforcement is provided within these grooves. The post-cast concrete layer is poured above the precast beam-slab units, independent precast beams, and node grooves, enclosing the node connecting reinforcement and extending reinforcement, forming an integrated beam-slab-column connection node with the node grooves. This invention solves the technical problems of numerous precast component processes, low hoisting efficiency, and low overall stiffness in existing technologies.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a composite frame integrating composite beams and slabs and its construction process. Background Technology

[0002] In the field of building construction, traditional frame structures are typically constructed using on-site formwork, rebar tying, and concrete pouring. This method suffers from problems such as a large amount of on-site wet work, excessive use of formwork supports, long construction periods, and significant susceptibility of project quality to on-site conditions. With the development of industrialized construction, prefabricated assembly structures have become widely used due to their advantages such as standardized component production, reduced on-site work, and faster construction speed. In existing prefabricated assembly frame structures, beams and slabs are often prefabricated, transported, and hoisted separately as independent components, and then assembled and connected on-site. Although some existing technologies improve the integrity of beam, slab, and column joints by setting grooves at the top of prefabricated columns or in composite beams and pouring cast-in-place sections, the focus of construction remains on the on-site lap joints between independent beams / slabs and columns. Beams and slabs have not yet formed integrated prefabricated units in the factory stage, resulting in numerous on-site hoisting operations, many beam and slab joints, and complex reinforcement arrangements at joints. There is still room for further improvement in construction efficiency and assembly quality.

[0003] For example, patent application CN108797795A discloses a composite precast beam and cast-in-place column assembly structure and construction process. This scheme sets up a precast column with a first groove at the top and a precast column cast-in-place part, a composite beam precast part with a continuous second groove on the beam body, and a composite slab precast part erected on the composite beam. By connecting the first groove at the top of the column with the second groove on the beam body, the precast column cast-in-place part, the composite beam cast-in-place part, and the composite slab cast-in-place part are integrally cast and formed. With the anchoring connection of multiple sets of steel bars, the force transmission between components is realized. During construction, the assembly is completed according to the process of precast component production, on-site hoisting and positioning, node steel bar binding, and overall cast-in-place pouring. By using the integral cast-in-place nodes with groove connections, the integrity and seismic performance of the beam-slab-column joints are enhanced, and the amount of scaffolding and formwork erection work during construction can be reduced.

[0004] However, the above-mentioned assembly structure still has some shortcomings in actual use: 1) The composite beam and composite slab are independent prefabricated components, which cannot be hoisted as a whole, and the on-site hoisting process is more complicated and time-consuming; 2) The composite beam adopts a through groove set along the entire length of the beam body, which will affect the cross-sectional performance of the middle section of the beam body and cannot guarantee the connection effect of the node parts; 3) The composite slab adopts the form of ordinary flat plate, and the overall stiffness of the prefabricated components is low, resulting in poor crack resistance during transportation and hoisting. Summary of the Invention

[0005] This invention provides a composite frame integrating composite beams and slabs to solve the technical problems of multiple prefabrication processes, low hoisting efficiency, and low overall stiffness in the prior art; the purpose of this invention is also to provide a construction process for a composite frame integrating composite beams and slabs.

[0006] To solve the above problems, the composite beam-slab integrated frame provided by the present invention adopts the following technical solution: The composite beam-slab integrated frame includes precast beam-slab units, independent precast beams, precast columns, joint connecting reinforcement, and post-cast concrete layers; the precast beam-slab units are precast from composite slabs and composite beams disposed on at least one side of the composite slabs; the top of the precast columns is provided with a support portion and outwardly extending reinforcing bars, the support portion being used to support the precast beam-slab units and the independent precast beams; The ends of the independent precast beams and / or the composite beams of the precast beam-slab units are provided with node grooves, and the node connecting steel bars are provided in the node grooves. The post-cast concrete layer is poured above the precast beam-slab unit, the independent precast beam, and the node groove, wrapping the node connecting steel bars and the extension steel bars, and together with the node groove, forming an integrated connection node for beam-slab-column load-bearing.

[0007] The beneficial effects of the above technical solution are as follows: the use of precast beam-slab units formed by prefabrication of composite slabs and composite beams as a whole can realize the overall hoisting and positioning of beam-slab components, reducing the number of on-site hoisting operations and positioning procedures; and the overall beam-slab structure formed in the prefabrication stage can improve the overall force transmission integrity at the beam-slab junction, and improve the force transmission effect of separate components relying solely on the post-cast concrete layer for bonding; compared with the setting method of continuous through groove in the existing technology, by setting the groove in the end node area of ​​the independent precast beam and composite beam, the influence of continuous groove on the main cross-sectional performance of the beam body can be avoided. At the same time, by accommodating the node connecting steel bars through the node groove, the connection performance of the node can be effectively improved in conjunction with the post-cast concrete layer; The support portion set at the top of the precast column can provide stable support for the precast beam and slab units and independent precast beams during the installation stage, reducing the workload of temporary support and formwork erection during construction. After the post-cast concrete layer wraps the joint connection steel bars and extension steel bars, it can work together with the joint groove to form an integrated force connection of beams, slabs and columns in the joint area, ensuring the continuity of force transmission and the overall working performance of the frame structure.

[0008] Furthermore, the composite beam of the precast beam-slab unit includes a full beam width structure and / or a half beam width structure; adjacent precast beam-slab units, or precast beam-slab units and independent precast beams, are joined together by corresponding half beam width structures to form a complete composite beam section.

[0009] The beneficial effects of the above technical solution are: the composite beams of the precast beam-slab units are provided with two structural forms, full beam width and half beam width, which can adapt to the splicing requirements of different positions of the frame; between adjacent precast beam-slab units, or between precast beam-slab units and independent precast beams, complete composite beam sections can be formed by corresponding splicing through the half beam width structure, ensuring the stress integrity and layout flexibility of the splicing parts.

[0010] Furthermore, the precast beam and slab units are configured in various modular construction forms to facilitate mutual replacement according to the stress position of the frame and the construction layout requirements; In at least one modular precast beam-slab unit, the upper part of the composite slab is provided with a bidirectional rib structure, which is used to improve the stiffness of the composite slab during the precast stage.

[0011] The beneficial effects of the above technical solution are: the precast beam and slab unit with bidirectional rib structure can improve the overall stiffness of the composite slab in the precast stage and reduce the possibility of deformation and cracking of components during transportation and hoisting.

[0012] Furthermore, the node groove is provided at the end node area of ​​the independent precast beam and the composite beam, and the main body of the beam body that is not at the end maintains a complete cross section; the inner wall of the node groove is set as a rough contact surface to enhance the bonding performance with the post-cast concrete; the end of the extended steel bar is provided with an anchoring structure and extends into the node groove or the post-cast concrete layer.

[0013] The beneficial effects of the above technical solution are as follows: setting the node groove in the end node area of ​​independent precast beams and composite beams preserves the complete cross section of the non-end main body of the beam, which can reduce the impact of the groove structure on the mechanical properties of the main body of the beam; setting a rough contact surface on the inner wall of the node groove can enhance the bonding performance between the post-cast concrete and the precast components; setting an anchoring structure at the end of the extended steel bar and extending into the node area can improve the anchoring effect of the steel bar at the node.

[0014] Furthermore, the composite slab is internally arranged with bidirectional truss reinforcement bars, which are used to cooperate with the post-cast concrete layer in bearing the load; the ends of the bottom longitudinal reinforcement bars of the composite slab are bent and extended to the corresponding composite beam or node groove area to enhance the overall connection between the composite slab and the composite beam.

[0015] The beneficial effects of the above technical solution are: arranging bidirectional truss reinforcement inside the composite slab allows the reinforcement and the post-cast concrete layer to work together to bear the load, enhancing the bidirectional load-bearing performance of the floor slab and improving the shear connection performance of the composite surface.

[0016] Furthermore, the independent precast beam has node grooves at both ends, and the independent precast beam has stirrups arranged inside; the bottom beam height of the node groove is 60mm-120mm, and the beam width on the side of the groove is 50mm-100mm.

[0017] Furthermore, the support portion is a corbel with reinforcing steel bars inside. The reinforcing steel bars are connected to the main reinforcement bars of the precast column to improve the load-bearing capacity of the support portion and the support reliability during the installation stage.

[0018] The beneficial effects of the above technical solution are: the support part adopts a corbel structure, which has a stable and reliable load-bearing form; the corbel is equipped with reinforcing steel bars and is connected to the main reinforcement bars of the precast column, which can improve the structural load-bearing capacity of the corbel part.

[0019] Furthermore, the node connecting steel bars are respectively anchored to the extended steel bars of the precast column, the internal steel bars of the composite beam, and the stressed steel bars of the composite slab, forming a continuous force-transmitting steel skeleton in the node area.

[0020] The beneficial effects of the above technical solution are: constructing a continuous steel reinforcement force transmission skeleton in the node area, so that the force of each component can be smoothly transmitted through the node area, thereby improving the overall stress performance of the node.

[0021] Furthermore, the post-cast concrete layer is continuously poured on the upper part of all precast beam and slab units, independent precast beams and node groove areas, and is tightly integrated with the upper interface of each precast component and the inner wall of the node groove, so that the beam, slab and column components form a unified load-bearing whole.

[0022] The beneficial effects of the composite beam-slab integrated frame provided by this invention are: (1) Achieve integrated prefabrication of beams and slabs. Prefabricate the composite slabs and composite beams as a whole in the factory to form prefabricated beam and slab units. This can reduce the process of hoisting and splicing independent prefabricated beams and independent composite slabs on site, reduce the workload of transportation, hoisting and on-site positioning, and improve the efficiency of assembly construction.

[0023] (2) Forming a modular construction system. The precast beam and slab units are set up in various modular construction forms. By combining units with different structures such as full beam width, half beam width, and two-way ribbed, they can adapt to the support, splicing and stress requirements of different positions of the frame structure, and improve the standardization of components and the flexibility of on-site layout.

[0024] (3) Improve the overall stress performance of the joint. The joint groove is set at the end of the composite beam of the independent precast beam and the precast beam-slab unit. The joint connecting steel bars are arranged in the groove and the post-cast concrete layer is poured. The beam, slab and column joints form an overall joint with the groove, connecting steel bars and post-cast concrete working together, which enhances the continuity of force transmission and the overall stress performance at the joint.

[0025] (4) Reduce the amount of temporary support and formwork. The support at the top of the precast column can directly support the independent precast beams and precast beam slab units during the installation stage. Combined with the extended reinforcement at the top of the column for post-cast connection, it can reduce the amount of traditional on-site full-span support and formwork system and shorten the construction cycle.

[0026] (5) Enhance the crack resistance and bending resistance of precast beam and slab units. The two-way truss reinforcement and the two-way rib structure together improve the stiffness and stress section of the precast composite slab, reduce the risk of cracking of components during transportation, hoisting and service, and improve the two-way stress capacity of the floor slab.

[0027] (6) Expand the engineering application scope of concrete materials. Through the synergistic effect of integrated prefabrication of beams and slabs, bidirectional rib reinforcement, bidirectional truss reinforcement restraint and post-cast integral joints, the deficiencies of some concrete materials in terms of strength, stiffness and early crack resistance can be made up, making them more suitable for promotion and application in prefabricated composite frames.

[0028] To address the aforementioned problems, the construction process of the composite beam-slab integrated frame provided by this invention adopts the following technical solution: The construction process of the composite beam-slab integrated frame involves first hoisting and fixing precast columns with top supports and extended reinforcing bars. Then, independent precast beams are hoisted and positioned onto the supports of the precast columns. Subsequently, precast beam-slab units, which are integrally precast from composite slabs and at least one side of composite beams, are hoisted and positioned to support the precast columns and / or the independent precast beams. After arranging node connecting reinforcing bars in the node grooves at the ends of the independent precast beams and / or the composite beams of the precast beam-slab units and completing the anchorage connection of the reinforcing bars, a post-cast concrete layer is poured. The post-cast concrete fills the node grooves and wraps the node connecting reinforcing bars and extended reinforcing bars, connecting the precast columns, independent precast beams, and precast beam-slab units to form an integrally load-bearing composite frame.

[0029] The beneficial effects of the construction process of the composite beam-slab integrated frame provided by this invention are as follows: Using precast beam-slab units, which are prefabricated as a whole, to hoist the composite slab and composite beam as a whole reduces the need for separate hoisting of individual precast beams and composite slabs on site, shortens the construction time for hoisting and on-site positioning, and improves assembly efficiency; during construction, the precast components are positioned and supported by the support at the top of the precast columns, reducing the workload of temporary on-site support and formwork system erection, and simplifying the on-site construction process; by arranging node connecting steel bars in the node grooves and pouring the post-cast concrete layer as a whole, a reliable overall connection can be formed between the beams, slabs, and columns in the node area, ensuring the continuity of node force transmission and the overall load-bearing performance of the frame structure. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the composite beam-slab integrated frame provided by the present invention. Figure 2 This is a schematic diagram of a type A precast beam-slab unit structure. Figure 3 This is a schematic diagram of the end of the bottom longitudinal reinforcement of the composite slab of type A precast beam-slab unit; Figure 4 This is a schematic diagram of a type B precast beam-slab unit structure. Figure 5 This is a schematic diagram of a C-type precast beam-slab unit structure. Figure 6 This is a schematic diagram of a D-type precast beam-slab unit structure. Figure 7 This is a schematic diagram of the structure of the independent precast beam in this invention; Figure 8 This is a schematic diagram of the precast column structure in this invention; Figure 9 This is a schematic diagram showing the precast column in the hoisting position. Figure 10 A schematic diagram showing the completion of the hoisting of an independent precast beam; Figure 11 This is a partial schematic diagram of the arrangement of the reinforcing bars connecting the nodes in the node groove; Figure 12 A schematic diagram showing the completion of the subsequent concrete pouring.

[0031] Explanation of reference numerals in the attached figures: 1. Type A precast beam-slab unit; 11. Type A composite slab; 12. Type A composite beam; 13. Type A two-way truss reinforcement; 14. Type A stirrups; 15. Type A groove; 16. Bottom longitudinal reinforcement of Type A composite slab; 2. Type B precast beam-slab unit; 21. Type B composite slab; 22. Type B composite beam; 23. Type B two-way truss reinforcement; 24. Type B stirrups; 25. Type B1 groove; 26. Type B2 groove; 3. Type C precast beam-slab unit; 31. 32. C-type composite slab; 33. C-type composite beam; 34. C-type two-way truss reinforcement; 35. C-type stirrup; 4. D-type precast beam-slab unit; 46. D-type composite slab; 47. D-type composite beam; 48. D-type two-way truss reinforcement; 49. Two-way rib; 20. Independent precast beam; 21. Node groove; 22. Stirrup; 33. Precast column; 44. Corbel; 55. Extended reinforcement; 66. Node connecting reinforcement; 77. Post-cast concrete layer. Detailed Implementation

[0032] The principles and spirit of the present invention will be explained in detail below with reference to several representative embodiments.

[0033] An embodiment of the composite beam-slab integrated frame provided by the present invention: like Figure 1As shown, the provided integrated composite beam-slab frame includes precast beam-slab units, independent precast beams 5, precast columns 6, connecting reinforcement at joints 7, and a post-cast concrete layer 8. The precast beam-slab units include four modular construction forms: Type A precast beam-slab unit 1, Type B precast beam-slab unit 2, Type C precast beam-slab unit 3, and Type D precast beam-slab unit 4. Each type of precast beam-slab unit is precast as a whole in the factory from the composite slab and the composite beams located on the corresponding side of the composite slab, eliminating the need for on-site beam-slab splicing.

[0034] In the assembled state, the independent precast beams 5 and various precast beam and slab units are supported on the top of the precast columns 6. The joint areas are arranged with connecting steel bars 7, and they are poured together with the post-cast concrete layer 8 to form a combined frame system in which beams, slabs and columns share the load. This can improve the efficiency of assembly construction while ensuring the overall load-bearing performance of the structure.

[0035] like Figure 2 As shown, the Type A precast beam-slab unit 1 includes a Type A composite slab 11 and Type A composite beams 12 located on both sides of the Type A composite slab 11. Both Type A composite beams 12 adopt a full beam width structure and are mostly used at the edge of the frame where a complete beam-slab boundary needs to be formed, which can provide better edge stiffness and support reliability. Type A bidirectional truss reinforcement 13 is arranged in the Type A composite slab 11, which can improve the overall stiffness of the composite slab during the precast stage. After the post-cast concrete layer 8 is poured, it can cooperate with the post-cast part to share the load, enhancing the bidirectional load-bearing performance of the floor slab and the shear connection performance of the composite surface.

[0036] Type A stirrups 14 are arranged inside the Type A composite beam 12 to ensure the shear resistance of the beam; Type A grooves 15 are provided at the ends of the composite beam to accommodate the connecting steel bars 7 and the post-poured concrete at the joints, providing structural space for the joint connections. Figure 3 As shown, the ends of the bottom longitudinal reinforcement 16 of the A-type composite slab are bent and extended into the area of ​​the A-type composite beam 12 or the end A-type groove 15, so that the composite slab and the composite beam have good overall connection in the prefabrication stage, which can improve the continuity of force transmission between the two.

[0037] like Figure 4 As shown, the B-type precast beam-slab unit 2 includes a B-type composite slab 21 and B-type composite beams 22 located on both sides of the B-type composite slab 21. One side of the B-type composite beam 22 is a full beam width structure, and the other side is a half beam width structure. It is mostly used for splicing transition positions between adjacent beam-slab units, which can adapt to the splicing requirements of different positions of the frame and improve the flexibility of on-site layout.

[0038] The B-type composite slab 21 contains B-type bidirectional truss reinforcement 23, which also enhances the stiffness of the composite slab and improves the bidirectional load-bearing performance after composite. The B-type composite beam 22 contains B-type stirrups 24. The ends of the composite beams on the full beam width side are provided with B1-type grooves 25, and the ends of the composite beams on the half beam width side are provided with B2-type grooves 26, which can respectively adapt to the node connection requirements on different sides and ensure that there is sufficient node connection space at each splicing position.

[0039] like Figure 5 As shown, the C-type precast beam-slab unit 3 includes a C-type composite slab 31 and C-type composite beams 32 located on both sides of the C-type composite slab 31. Both C-type composite beams 32 adopt a half-beam width structure and are mostly used to combine with adjacent precast beam-slab units to form a composite beam.

[0040] Adjacent half-beam width structures can be spliced ​​together to form a complete composite beam section, ensuring the structural integrity of the splice. C-shaped composite slab 31 is equipped with C-shaped two-way truss reinforcement 33, and C-shaped composite beam 32 is equipped with C-shaped stirrups 34. C-shaped grooves 35 are provided at the ends of the composite beam to cooperate with adjacent components to form a complete node receiving area.

[0041] like Figure 6 As shown, the D-type precast beam-slab unit 4 includes a D-type composite slab 41 and a D-type composite beam 42 located on at least one side of the D-type composite slab 41. It is mostly used in areas where the stiffness and crack resistance of the precast base slab are required to be high. The upper part of the D-type composite slab 41 is provided with bidirectional ribs 44, and D-type bidirectional truss steel bars 43 are arranged inside. The bidirectional ribs 44 can directly improve the cross-sectional stiffness of the composite slab in the precast stage and reduce the possibility of deformation and cracking of the component during transportation and hoisting.

[0042] After the post-cast concrete layer 8 is poured, the bidirectional rib 44 can work together with the post-cast part to increase the effective load-bearing section of the floor slab, further improving the flexural strength and bidirectional load-bearing capacity of the floor slab. This structure can compensate for some of the deficiencies of concrete materials in terms of stiffness and early crack resistance, and expand the range of applicable concrete materials.

[0043] like Figure 7 As shown, the independent precast beam 5 is used to cooperate with various types of precast beam and slab units to complete the span arrangement within the frame. Both ends of the beam are provided with node grooves 51, which correspond to the end grooves of adjacent precast beam and slab units, together enclosing the receiving space of the node area. Unlike grooves that run the entire length, these grooves are only located in the end node areas of the beam. The main body of the beam outside the ends maintains a complete cross-section, reducing the impact of the groove structure on the main mechanical properties of the beam body, and concentrating structural reinforcement in the area requiring node connection.

[0044] The inner wall of the node groove 51 can be provided with a rough contact surface to enhance the bonding performance between the post-cast concrete and the precast component; the independent precast beam 5 is internally arranged with stirrups 52 to ensure the shear resistance of the beam. In specific implementation, the bottom beam height of the groove can be set to 60mm-120mm, and the beam width on the side of the groove can be set to 50mm-100mm, which can ensure the operation space for node connection while maintaining the structural strength of the beam end.

[0045] like Figure 8 As shown, the top of the precast column 6 is equipped with a corbel 61 and an extended reinforcing bar 62. The corbel 61 serves as a support, used to support the independent precast beam 5 and each precast beam-slab unit during the installation phase, providing positioning support for the component. The corbel 61 contains reinforcing bars, which are reliably connected to the main reinforcing bars of the precast column 6. This enhances the load-bearing capacity and support reliability of the corbel, allowing the component to be positioned without the need for extensive temporary supports and formwork systems during installation, thus reducing the workload of erecting temporary facilities on site.

[0046] The extended steel bar 62 extends outward from the top of the precast column 6, with an anchor end at the end. After assembly, it extends into the joint groove or the interior of the post-cast concrete layer 8, which can improve the anchorage effect of the steel bar at the joint and enhance the anchorage force transmission performance of the joint area.

[0047] After assembly, the connecting steel bars 7 at the nodes are arranged in the node grooves at the ends of the independent precast beam 5 and the precast beam slab unit. The connecting steel bars 7 at the nodes form reliable anchorage connections with the extension steel bars 62 of the precast column 6, the internal steel bars of the composite beam, and the stressed steel bars of the composite slab. A continuous steel reinforcement force transmission skeleton can be constructed in the node area, so that the force of each component can be smoothly transmitted through the node area.

[0048] The post-cast concrete layer 8 is continuously poured on the upper part of all precast beam and slab units, independent precast beams 5 and node groove areas. It can be tightly combined with the upper interface of each precast component and the inner wall of the node groove, and wrap all node reinforcement and extension reinforcement, so that the beam, slab and column components form a unified load-bearing whole, further ensuring the continuity of structural force transmission.

[0049] The working principle of the composite beam-slab integrated frame provided by this invention is as follows: Figure 9 As shown, during the construction phase, the hoisting and fixing of precast columns 6 are completed first. The span between columns is determined based on the length of the independent precast beams 5 and the dimensions of the precast beam-slab units. Figure 10 As shown, the independent precast beam 5 is then hoisted onto the corbel 61 at the top of the precast column 6 to complete its positioning. Then, various types of precast beam and slab units are hoisted in sequence to support them on the corbel 61 and / or the independent precast beam 5 of the precast column 6. In this process, the precast beam and slab units are hoisted as a whole, which reduces the on-site hoisting procedures for beams and slabs, and shortens the construction time for hoisting and on-site positioning. For example... Figure 11 As shown, after the components are in place, the node connecting steel bars 7 are arranged in the node grooves at the ends of the independent precast beam 5 and the precast beam slab unit, so that the node connecting steel bars 7 and the extension steel bars 62 of the precast column 6 and the stressed steel bars inside each precast component form a reliable anchoring connection. like Figure 12 As shown, the final post-cast concrete layer 8 is poured, filling all the joint grooves and encasing the connecting steel bars 7 and extending steel bars 62 at the joints. This connects the precast columns 6, independent precast beams 5, and each precast beam-slab unit into a structurally integrated frame structure. During the service phase, the floor load is transferred to the composite beams and independent precast beams 5 through the composite slabs of the precast beam-slab units, and then to the precast columns 6 via the joint areas. The joint areas achieve continuous force transmission through the interlocking of the grooves and the continuous internal steel reinforcement skeleton, ensuring the overall load-bearing performance and operational stability of the entire frame structure.

[0050] An embodiment of the construction process for the composite beam-slab integrated frame provided by this invention: The construction process of the composite beam-slab integrated frame involves first hoisting and fixing the precast column 6 with a top support and extension steel bars 62, then hoisting the independent precast beam 5 into position on the support of the precast column 6, and then hoisting the precast beam-slab unit, which is integrally precast from the composite slab and at least one side of the composite beam, into position so that it is supported on the support of the precast column 6 and / or the independent precast beam 5; after arranging the node connecting steel bars 7 in the node grooves at the ends of the independent precast beam 5 and / or the precast beam-slab unit composite beam and completing the steel bar anchorage connection, pouring the post-cast concrete layer 8, so that the post-cast concrete fills the node grooves and wraps the node connecting steel bars and extension steel bars, connecting the precast column, independent precast beam and precast beam-slab unit to form an integrally load-bearing composite frame.

[0051] In addition, before pouring the post-cast concrete layer 8, the inner wall of the node groove and the connection surface of the precast component are cleaned, moistened or treated. When the precast beam and slab unit or independent precast beam uses geopolymer recycled concrete, the rigidity of the component during the hoisting stage and the overall stress performance after the node is formed are improved by the two-way truss reinforcement, two-way ribs, the connecting reinforcement at the node and the post-cast concrete layer 8.

[0052] Based on the above description in this specification, those skilled in the art will also understand that the following terms, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0053] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A composite frame integrating beams and slabs, characterized in that: It includes precast beam-slab units, independent precast beams, precast columns, joint connecting reinforcement, and post-cast concrete layers; the precast beam-slab unit is integrally precast from a composite slab and a composite beam disposed on at least one side of the composite slab; the top of the precast column is provided with a support portion and outwardly extending reinforcing bars, the support portion being used to support the precast beam-slab unit and the independent precast beam; The ends of the independent precast beams and / or the composite beams of the precast beam-slab units are provided with node grooves, and the node connecting steel bars are arranged in the node grooves; the post-cast concrete layer is poured on top of the precast beam-slab units, the independent precast beams and the node grooves, wrapping the node connecting steel bars and the extension steel bars, and together with the node grooves, forming an integrated connection node for beam-slab-column load-bearing.

2. The composite beam-slab integrated frame according to claim 1, characterized in that: The composite beam of the precast beam-slab unit includes a full beam width structure and / or a half beam width structure; adjacent precast beam-slab units, or precast beam-slab units and independent precast beams, are joined together by corresponding half beam width structures to form a complete composite beam section.

3. The composite beam-slab integrated frame according to claim 2, characterized in that: The precast beam and slab unit is configured with multiple modular construction forms to facilitate mutual replacement according to the stress position of the frame and construction layout requirements; in at least one modular precast beam and slab unit, the upper part of the composite slab is provided with a two-way rib structure, which is used to improve the stiffness of the composite slab during the precast stage.

4. The composite beam-slab integrated frame according to any one of claims 1 to 3, characterized in that: The node groove is set in the end node area of ​​the independent precast beam and the composite beam, and the main body of the beam body that is not at the end maintains an intact cross section; the inner wall of the node groove is set as a rough contact surface to enhance the bonding performance with the post-cast concrete; the end of the extended steel bar is provided with an anchoring structure and extends into the node groove or the post-cast concrete layer.

5. The composite beam-slab integrated frame according to claim 4, characterized in that: The composite slab is internally reinforced with bidirectional truss reinforcement, which is used to share the load with the post-cast concrete layer; the ends of the bottom longitudinal reinforcement of the composite slab are bent and extended into the corresponding composite beam or node groove area to enhance the overall connection between the composite slab and the composite beam.

6. The composite beam-slab integrated frame according to claim 4, characterized in that: The independent precast beam has node grooves at both ends, and stirrups are arranged inside the independent precast beam; the bottom beam height of the node groove is 60mm-120mm, and the beam width on the side of the groove is 50mm-100mm.

7. The composite beam-slab integrated frame according to any one of claims 1 to 3, characterized in that: The supporting part is a corbel, which is equipped with reinforcing steel bars inside. The reinforcing steel bars are connected to the main reinforcement bars of the precast column to improve the load-bearing capacity of the supporting part and the support reliability during the installation stage.

8. The composite beam-slab integrated frame according to any one of claims 1 to 3, characterized in that: The node connecting steel bars are respectively anchored to the extended steel bars of the precast column, the internal steel bars of the composite beam, and the stressed steel bars of the composite slab, forming a continuous force-transmitting steel skeleton in the node area.

9. The composite beam-slab integrated frame according to any one of claims 1 to 3, characterized in that: The post-cast concrete layer is continuously poured on the upper part of all precast beam and slab units, independent precast beams and node groove areas, and is tightly integrated with the upper interface of each precast component and the inner wall of the node groove, so that the beam, slab and column components form a unified load-bearing whole.

10. The construction process of a composite frame integrating beams and slabs, characterized by: First, the precast columns with top supports and extended reinforcing bars are hoisted and fixed. Then, the independent precast beams are hoisted and positioned onto the supports of the precast columns. Subsequently, the precast beam-slab units, which are integrally precast from composite slabs and at least one side of composite beams, are hoisted and positioned to support the precast columns and / or the independent precast beams. After arranging node connecting reinforcing bars in the node grooves at the ends of the independent precast beams and / or the composite beams of the precast beam-slab units and completing the anchorage connection of the reinforcing bars, a post-cast concrete layer is poured. The post-cast concrete fills the node grooves and wraps the node connecting reinforcing bars and extended reinforcing bars, connecting the precast columns, independent precast beams, and precast beam-slab units to form an integrally load-bearing composite frame.

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