Construction method of tooth-shaped closely-spliced joint concrete composite floor slab

Abstract

The invention discloses a construction method of a tooth-shaped closely-spliced joint concrete composite floor slab, the composite floor slab comprises prefabricated slabs, the side faces of the prefabricated slabs are provided with embedded teeth, every two adjacent prefabricated slabs can be connected through mutual engagement of the embedded teeth, and the prefabricated slabs are provided with truss steel bars extending out in the thickness direction of the prefabricated slabs. By arranging the embedded teeth on the side faces of the prefabricated slabs, the connecting strength of the spliced prefabricated slabs can be improved, so that the number of needed temporary supporting pieces is reduced, the construction time of the supporting pieces is shortened, and the construction efficiency is improved. The invention relates to the field of fabricated buildings in civil engineering.

Description

Technical Field

[0001] The present application relates to the field of prefabricated buildings in civil engineering, and in particular to a construction method for a concrete composite floor slab with tooth-shaped close-jointed joints. Background Art

[0002] Concrete composite slabs are a type of prefabricated structural component that combines precast panels with cast-in-place concrete. In actual construction, precast panels are made in the factory. After being transported to the construction site, the precast panels are combined with the post-cast concrete composite layer as a whole to work together. Concrete composite slabs have good integrity, and the upper and lower surfaces of the slabs are flat, which is convenient for finishing layer decoration. They are suitable for multi-story buildings and large-span buildings that require high overall rigidity. Moreover, the construction speed of concrete composite slabs is faster than that of pure concrete slabs, which can improve construction efficiency.

[0003] However, during the construction phase, concrete composite slabs generally still require the installation of necessary steel pipe supports as temporary supports for the construction of prefabricated slabs and post-poured concrete composite layers. Compared with the cast-in-place construction process, there is no significant improvement, and there is still room for improvement in construction efficiency. Corresponding solutions are urgently needed. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a construction method for a toothed close-jointed concrete composite floor slab, which can reduce the number of supports, shorten the time spent on setting up temporary supports, and improve construction efficiency.

[0005] The construction method of the tooth-shaped close-jointed concrete composite floor slab according to the embodiment of the present application includes:

[0006] A tooth-shaped close-jointed concrete composite floor slab comprises a prefabricated slab, the side of the prefabricated slab is provided with engaging teeth, two adjacent prefabricated slabs can be connected by mutual engagement of the engaging teeth, and the prefabricated slab is provided with truss steel bars extending along the thickness direction of the prefabricated slab;

[0007] The construction method of the tooth-shaped close-jointed concrete composite floor slab comprises the following steps:

[0008] Tie up reinforcement bars for concrete columns and beams, support formwork and pour concrete, or position and hoist precast concrete beams and columns;

[0009] No temporary support frames are required or only a small number of temporary support frames are required as needed;

[0010] Survey and lay out, and lay out the control lines of beam and slab overlap on site;

[0011] Hoisting the prefabricated panels;

[0012] The prefabricated panels are assembled together by the engaging teeth;

[0013] Binding the additional steel bars of the precast panel surface and the steel bars of the laminated layer surface;

[0014] Concrete is poured on the precast panel to form a concrete laminated layer, and the concrete laminated layer is combined with the precast panel into a whole after solidification.

[0015] The construction method of the tooth-shaped close-jointed concrete composite floor slab according to the embodiment of the present application has at least the following beneficial effects: by arranging interlocking teeth on the sides of the prefabricated panels, the connection strength of each prefabricated panel after assembly can be improved, thereby reducing the number of temporary support members required, shortening the construction time of the support members, and improving construction efficiency.

[0016] According to some embodiments of the present application, a steel support or a concrete corbel support is further provided on the concrete beam to support the precast panel.

[0017] If steel supports are used, pouring the concrete beam:

[0018] Determine the installation position and size of the sleeve and steel support according to the construction load;

[0019] Tie the reinforcement bars of the concrete beam and pour the concrete beam, and reserve sleeves when pouring the concrete beam;

[0020] Inserting bolts into the sleeve and fixing the steel support to the concrete beam through the bolts;

[0021] The steel support can be disassembled and reused after construction is completed.

[0022] If concrete corbel support is used, pour the concrete beam:

[0023] Determine the position and size of the corbel support according to the construction load;

[0024] The concrete beams and corbel reinforcements are tied and the concrete is poured.

[0025] According to some embodiments of the present application, the prefabricated panels can be assembled by vertical hoisting assembly or horizontal hoisting assembly.

[0026] According to some embodiments of the present application, after the prefabricated panels are assembled, slurry is poured into the joints of the interlocking teeth, and after the slurry solidifies, the assembly stability of the prefabricated panels can be improved.

[0027] According to some embodiments of the present application, the toothed close-jointed concrete composite floor slab further includes a concrete composite layer, the concrete composite layer is disposed on the prefabricated slab, and the truss steel bars extend into the concrete composite layer and are anchored thereto.

[0028] According to some embodiments of the present application, the tooth shape of the engaging teeth is rectangular, trapezoidal or mortise and tenon-shaped.

[0029] According to some embodiments of the present application, the prefabricated panel is provided with additional steel bars, and the additional steel bars include additional steel bars arranged at the joints of the prefabricated panel surface and additional steel bars of the interlocking teeth extending into the interior of the interlocking teeth.

[0030] According to some embodiments of the present application, the additional reinforcement of the engaging tooth extends along the tooth profile of the engaging tooth.

[0031] According to some embodiments of the present application, a steel mesh is further provided in the prefabricated panel, and the steel mesh is provided in the middle portion of the prefabricated panel.

[0032] According to some embodiments of the present application, the spacing between the additional steel bars of the interlocking teeth is the same as the mesh width of the steel mesh.

[0033] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are used to provide further understanding of the technical solution disclosed in the present application and constitute a part of the specification. Together with the embodiments disclosed in the present application, they are used to explain the technical solution disclosed in the present application and do not constitute a limitation on the technical solution disclosed in the present application.

[0035] Figure 1 A top view of a concrete composite floor slab with tooth-shaped close-jointed joints according to an embodiment of the present application;

[0036] Figure 2 A side view of a concrete composite floor slab with tooth-shaped close-jointed joints according to an embodiment of the present application;

[0037] Figure 3 A top view of a precast slab in a concrete composite floor slab with tooth-shaped close-jointed joints according to an embodiment of the present application;

[0038] Figure 4 This is a schematic diagram of a concrete composite floor slab with close-jointed toothed joints using trapezoidal interlocking teeth according to an embodiment of the present application;

[0039] Figure 5 A schematic diagram of a concrete composite floor slab with tooth-shaped close-jointed joints using mortise and tenon-shaped interlocking teeth in an embodiment of the present application;

[0040] Figure 6 This is a schematic diagram of the structure of a concrete beam during the construction process of an embodiment of the present application;

[0041] Figure 7 This is a schematic diagram of horizontally hoisting prefabricated panels during the construction process of the embodiment of the present application;

[0042] Figure 8 This is a schematic diagram of vertically hoisting prefabricated panels during the construction process of an embodiment of the present application.

[0043] Figure numerals: 100 - precast panel, 110 - interlocking teeth, 120 - truss reinforcement, 130 - reinforcement mesh, 141 - additional reinforcement at joints, 142 - additional reinforcement for interlocking teeth, 200 - concrete overlay layer, 300 - slurry layer, 400 - concrete beam, 410 - steel support, 420 - bolt, 430 - corbel. DETAILED DESCRIPTION

[0044] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0045] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0047] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0048] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0049] Concrete composite slabs are a type of prefabricated structural component that combines precast panels with cast-in-place concrete. In actual construction, precast panels are made in the factory. After being transported to the construction site, the precast panels are combined with the post-cast concrete composite layer as a whole to work together. Concrete composite slabs have good integrity, and the upper and lower surfaces of the slabs are flat, which is convenient for finishing layer decoration. They are suitable for multi-story buildings and large-span buildings that require high overall rigidity. Moreover, the construction speed of concrete composite slabs is faster than that of pure concrete slabs, which can improve construction efficiency.

[0050] However, during the construction phase, the concrete composite slab still needs to be equipped with necessary steel pipe supports as temporary supports for the construction of the precast slab and the post-cast concrete composite layer. Since the precast slab is generally composed of small slabs, more steel pipe supports are required. Compared with the cast-in-place construction process, there is no significant improvement in the setting of temporary supports. There is still room for improvement in construction efficiency, and corresponding solutions are urgently needed.

[0051] In this regard, the present application proposes a construction method for a tooth-shaped close-jointed concrete composite floor slab. By setting interlocking teeth 110 on the side of the prefabricated panel 100, the connection strength of each prefabricated panel 100 after assembly can be improved, thereby reducing the number of temporary support parts required, shortening the construction time of the support parts, and improving construction efficiency.

[0052] Reference Figure 1 and Figure 2 The tooth-shaped close-jointed concrete composite floor slab in the embodiment of the present application includes a precast panel 100. The precast panel 100 is the main structure of the tooth-shaped close-jointed concrete composite floor slab, which is transported to the construction site after being produced in the factory. Using the precast panel 100 as the structural base can improve the structural strength and save the pouring time, thereby improving the efficiency of floor slab construction.

[0053] Specifically, the side of the prefabricated panel 100 is provided with engaging teeth 110, and two adjacent prefabricated panels 100 can be connected by the mutual engagement of the engaging teeth 110. Compared with the direct splicing method of the traditional prefabricated panels 100, the engagement splicing using the engaging teeth 110 can strengthen the splicing strength between the two prefabricated panels 100, thereby reducing the use of subsequent support members, and further reducing the construction time of the support members. In the present application, the support member refers to a component that elevates the prefabricated panel 100 to meet construction requirements, including but not limited to supporting steel pipes, supporting beams or temporary supporting columns, etc., which can be removed or retained as a permanent supporting structure after the construction is completed. Furthermore, the prefabricated panel 100 is provided with truss steel bars 120 extending along the thickness direction of the prefabricated panel 100, and the thickness direction of the prefabricated panel 100 is referred to. Figure 2 The truss steel bars 120 extending from the precast panel 100 are used to be anchored to the concrete laminated layer 200 when the concrete laminated layer 200 is subsequently poured, thereby improving the connection strength between the concrete laminated layer 200 and the precast panel 100 .

[0054] Furthermore, the tooth-shaped close-jointed concrete composite floor slab further includes a concrete composite layer 200, which is arranged on the precast panel 100 and is formed by pouring concrete on the precast panel 100. The truss steel bars 120 extend into the concrete composite layer 200 and are anchored to each other.

[0055] Further, refer to Figure 3 The precast panel 100 is provided with a steel mesh 130 and additional steel bars 142 for the interlocking teeth. The steel mesh 130 is provided in the middle of the precast panel 100 as the skeleton of the main part of the precast panel 100, improving the structural strength of the main part of the precast panel 100, and serving as the bottom reinforcement of the slab after the composite panel is cast. The additional steel bars 141 at the joint are laid out before the concrete composite layer 200 is cast to ensure the integrity of the joint. The additional steel bars 142 for the interlocking teeth serve as the skeleton of the interlocking teeth 110 to improve the structural strength of the interlocking teeth 110.

[0056] Furthermore, the spacing of the additional steel bars 142 of the interlocking teeth is the same as the mesh width of the steel mesh 130, so that the additional steel bars 142 of the interlocking teeth can be provided by extending the longitudinal bars of the steel mesh 130, thereby saving the amount of steel bars.

[0057] Furthermore, the additional reinforcement 142 of the engaging tooth extends along the tooth profile of the engaging tooth 110 , so that the tooth profile of the engaging tooth 110 is maintained by the additional reinforcement 142 during the splicing process, thereby preventing the tooth profile of the engaging tooth 110 from being deformed or cracked due to collision.

[0058] For the tooth shape of the engaging tooth 110, refer to Figure 1 In some embodiments, the tooth shape of the engaging tooth 110 is rectangular, which has a simple structure and is easy to manufacture. Figure 4In some embodiments, the tooth shape of the engaging teeth 110 is a trapezoid, which facilitates alignment and assembly during subsequent assembly, thereby improving assembly efficiency. Figure 5 In some embodiments, the tooth shape of the engaging teeth 110 is a mortise and tenon shape, so that the two prefabricated panels 100 are not easily loosened after being assembled, thereby improving the stability of the assembled prefabricated panels 100. It is easy to understand that the engaging teeth 110 can also adopt other tooth shapes for assembly, which will not be repeated here.

[0059] Furthermore, the tooth-shaped close-jointed concrete composite floor slab further includes a slurry layer 300, which is coated on the surface of the interlocking teeth 110. When the slurry layer 300 solidifies, it can bond the joints of the interlocking teeth 110, thereby improving the connection stability when the interlocking teeth 110 are joined together.

[0060] In an embodiment of the present application, a construction method for the above-mentioned tooth-shaped close-jointed concrete composite floor slab comprises the following steps:

[0061] S100. Tie up reinforcement bars for concrete columns and beams, support formwork and pour concrete, or position and hoist precast concrete beams and columns;

[0062] S200. Set up temporary support frame; since the tooth-shaped close-jointed concrete composite floor slab has the characteristics of less support or even no support, a small amount of necessary temporary support or no temporary support can be set up on site according to the specific situation;

[0063] S300. Measurement and setting out, on-site beam edge lap control line setting out;

[0064] S400. Hoisting the precast panel 100; using four-point lifting, the upper end of the precast panel 100 is connected to the hook through four sets of steel ropes, so that the first precast panel 100 is aligned with the designated position line of the composite panel, and slowly and steadily falls into place;

[0065] S500. The prefabricated panels 100 are assembled together by engaging the teeth 110;

[0066] S600. Clean the debris on the precast panel 100 and the panel seams, and arrange and tie the laminated panel surface reinforcement according to the drawing requirements; tie the additional reinforcement 141 at the joints on the precast panel 100;

[0067] S700. Pour concrete on the precast panel 100 to form a concrete superimposed layer 200. After the surface of the component is cleaned, the nodes and superimposed surfaces are fully watered before pouring the concrete. At the connection between the precast panel 100 and the surrounding cast-in-place concrete structure, the vibration points are increased when pouring concrete. The position of the embedded parts is not moved during concrete pouring, and the embedded exposed connection parts are not polluted. The concrete superimposed layer 200 is covered and watered for maintenance within 12 hours after the concrete is poured. When the average temperature of the day is lower than 5°C, insulation measures are adopted for maintenance, and the maintenance time should meet the requirements of the specifications. After the concrete superimposed layer 200 solidifies, it is combined with the precast panel 100 as a whole.

[0068] Furthermore, for step S100, a fully assembled structure can be selected, in which the concrete beams and columns are all prefabricated; a fully cast-in-place structure can be selected, in which the concrete beams and columns are all cast-in-place; or a partially assembled structure can be selected, in which the concrete columns are prefabricated and the beams are cast-in-place or the concrete columns are cast-in-place and the beams are prefabricated.

[0069] Furthermore, in order to stably support the prefabricated panel 100 during the construction process, refer to Figure 4 The concrete beam 400 is also provided with a steel support 410 or a corbel 430 to support the precast panel 100. When pouring the concrete beam 400:

[0070] S110. Determine the installation position and size of the sleeve and steel support 410 according to the construction load;

[0071] S120. Tie the reinforcement bars of concrete columns and pour the concrete columns;

[0072] S130. The concrete beam 400 is reinforced and the concrete beam 400 is poured, and a sleeve is reserved when pouring the concrete beam 400;

[0073] S140 . Insert the bolt 420 into the sleeve, and fix the steel support 410 to the concrete beam 400 via the bolt 420 .

[0074] Among them, the steel support 410 can be made of angle steel (refer to Figure 6 a) or channel steel (refer to Figure 6 b) in the production, the prefabricated panel 100 can be supported by the steel support 410 after being inserted into the steel support, and the steel support can be removed after the construction is completed. Alternatively, a corbel 430 can also be provided on the concrete beam 400, and the corbel 430 and the concrete beam 400 are cast in one piece, and the corbel 430 can adopt a trapezoidal corbel structure (refer to Figure 6 c) or rectangular bracket structure (refer to Figure 6 In d), the support is a point support and is not distributed along the length of the beam.

[0075] Further, refer to Figure 7 and Figure 8The prefabricated panels 100 can be assembled by vertical hoisting or horizontal hoisting. The specific assembly method is selected according to the shape of the engaging teeth 110.

[0076] Furthermore, after the prefabricated panels 100 are assembled, slurry is poured into the joints of the engaging teeth 110 , and after the slurry solidifies, the assembly stability of the prefabricated panels 100 can be improved.

[0077] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A construction method for a concrete composite floor slab with toothed close joints, characterized in that: A tooth-shaped close-jointed concrete composite floor slab comprises a prefabricated slab, the side of the prefabricated slab is provided with engaging teeth, two adjacent prefabricated slabs can be connected by mutual engagement of the engaging teeth, and the prefabricated slab is provided with truss steel bars extending along the thickness direction of the prefabricated slab; The construction method of the tooth-shaped close-jointed concrete composite floor slab comprises the following steps: Tie up reinforcement bars for concrete columns and beams, support formwork and pour concrete, or position and hoist precast concrete beams and columns; No temporary support frames are required or only a small number of temporary support frames are required as needed; Survey and lay out, and lay out the control lines of beam and slab overlap on site; Hoisting the prefabricated panels; The prefabricated panels are assembled together by the engaging teeth; Binding the additional steel bars of the precast panel surface and the steel bars of the laminated layer surface; Concrete is poured on the precast panel to form a concrete laminated layer, and the concrete laminated layer is combined with the precast panel into a whole after solidification.

2. The construction method of the toothed close-jointed concrete composite floor slab according to claim 1 is characterized by: A steel support or a concrete corbel support is also provided on the concrete beam to support the precast slab. If steel supports are used, pouring the concrete beam: Determine the installation position and size of the sleeve and steel support according to the construction load; Tie the reinforcement bars of the concrete beam and pour the concrete beam, and reserve sleeves when pouring the concrete beam; Inserting bolts into the sleeve and fixing the steel support to the concrete beam through the bolts; The steel support can be disassembled and reused after construction is completed. If concrete corbel support is used, pour the concrete beam: Determine the position and size of the corbel support according to the construction load; The concrete beams and corbel reinforcements are tied and the concrete is poured.

3. The construction method of the toothed close-jointed concrete composite floor slab according to claim 1 is characterized by: The prefabricated panels can be assembled by vertical hoisting or horizontal hoisting.

4. The construction method of the toothed close-jointed concrete composite floor slab according to claim 1 is characterized by: After the prefabricated panels are assembled, slurry is poured into the joints of the interlocking teeth, and after the slurry solidifies, the assembly reliability of the prefabricated panels can be improved.

5. The construction method of the toothed close-jointed concrete composite floor slab according to claim 1 is characterized by: The tooth-shaped close-jointed concrete composite floor slab also includes a concrete composite layer, which is arranged on the prefabricated plate, and the truss steel bars extend into the concrete composite layer and are anchored to each other.

6. The construction method of the toothed close-jointed concrete composite floor slab according to claim 1 is characterized by: The tooth shape of the engaging teeth is rectangular, trapezoidal or mortise and tenon-shaped.

7. The construction method of the toothed close-jointed concrete composite floor slab according to claim 6 is characterized by: Additional steel bars are arranged in the prefabricated board, and the additional steel bars include additional steel bars arranged at the joints of the prefabricated board surface and additional steel bars for the interlocking teeth extending into the inside of the interlocking teeth.

8. The construction method of the tooth-shaped close-jointed concrete composite floor slab according to claim 7 is characterized by: The additional reinforcement of the engaging teeth extends along the tooth profile of the engaging teeth.

9. The construction method of the tooth-shaped close-jointed concrete composite floor slab according to claim 7 is characterized by: A steel mesh is also arranged in the prefabricated board, and the steel mesh is arranged in the middle part of the prefabricated board.

10. The construction method of the toothed close-jointed concrete composite floor slab according to claim 9, characterized in that: The spacing of the additional steel bars of the interlocking teeth is the same as the mesh width of the steel mesh.

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