An assembled monolithic flat slab and its construction method

Abstract

A prefabricated monolithic flat slab and its construction method, belonging to the field of building structure engineering technology, includes columns, rod-type column capitals with diagonal braces, steel tie plate frames, steel support plates, precast slabs A, B, and C, reinforcing bars, and concrete. This invention provides support for the precast slabs through rod-type column capitals, steel tie plate frames, and support plates. All components themselves provide rigidity, eliminating the need for supports or formwork during construction, making installation convenient and time-saving.

Description

Technical Field

[0001] This invention belongs to the field of building structure engineering technology, and in particular relates to prefabricated monolithic flat slabs and their construction methods. Background Technology

[0002] Flat slab floor systems are structures where frame columns directly support solid slabs. This type of structure is characterized by simple load transfer, straightforward construction, and convenient installation. It effectively reduces structural height and increases building ceiling height, making it widely used in public buildings such as shopping malls and basements.

[0003] Traditional flat slab structures have heavy column caps and thick slabs, making factory production, transportation, and assembly difficult. They also have poor overall structural integrity, which has slowed their development in prefabricated construction and made it difficult to meet the development needs of the prefabricated building industry, thus affecting the application of flat slab structures in engineering. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a prefabricated monolithic flat slab and its construction method, which, combined with the latest rod-type column caps, provides a prefabricated monolithic flat slab that is suitable for factory production, can be assembled, requires no formwork, reduces the weight of the column caps, and facilitates pipeline layout.

[0005] A prefabricated monolithic flat slab system, characterized by comprising columns, column capitals with diagonal braces, steel tie plates, steel support plates, precast slabs A, B, and C, reinforcing steel, and concrete.

[0006] One end of the rod-type column cap diagonal is connected to the column, and the other end is connected to the top corner of the precast slab B through a steel tie plate frame and a steel support plate. The plane projection direction of the rod-type column cap diagonal is at 45° with the plane principal axis direction.

[0007] The precast slabs A, B, and C are spliced ​​together to form a floor plan. The column is located at the lower center of the precast slab B. The steel tie plate frame is located around the precast slab B. The lower part of the steel tie plate frame is provided with a steel support plate. The two opposite sides of the precast slab C are supported by the steel support plate around the precast slab B. The remaining two opposite sides of the precast slab A and the precast slab C are connected.

[0008] The reinforcing bars are laid on top of the floor slab formed by precast slabs A, B, and C, and then concrete is poured on top of it.

[0009] The cross-section of the steel support plate and the steel tie plate frame is an I-shape or an inverted T-shape with the lower edge flange wider than the upper edge flange.

[0010] The bottom of the precast slabs A, B, and C are provided with reinforcing bars. The reinforcing bars at the joint between the precast slabs C and A are connected to each other, and a hidden beam with reinforcing bars is provided at the connection point.

[0011] Precast slabs A, B, and C are provided with shear reinforcement bars as required, and the steel bars are connected to the shear reinforcement bars.

[0012] The precast slabs A, B, and C are cast using templates, and shear protrusions are provided on the sides and top as required.

[0013] A construction method for a prefabricated monolithic flat slab floor system, comprising the following steps, performed sequentially:

[0014] Step 1: Prefabricate and install the columns;

[0015] Step 2: Install diagonal column caps around the column, with the diagonal column caps forming a 45° angle with the column;

[0016] Step 3: Assemble the steel tie plate frame and steel support plate, with a cross-section that is either an inverted T-shape or an I-shape where the lower flange is wider than the upper flange;

[0017] Step 4: Install the structural components assembled in Step 3 at the ends of the rod-type column cap diagonal members to form a rigid spatial body;

[0018] Step 5: Install precast slab A, precast slab B, and precast slab C onto the steel support plate and fix them with embedded parts;

[0019] Step 6: Connect the reinforcing bars of precast slab A, precast slab B, and precast slab C, and tie the hidden beam reinforcing bars;

[0020] Step 7: Lay the top reinforcement of the flat slab, connect the shear bars to the precast steel mesh and assist in positioning;

[0021] Step 8: Pour concrete on the top of precast slabs A, B, and C, as well as at the joints, to complete the construction of the precast monolithic flat slab.

[0022] Through the above design scheme, the present invention can bring the following beneficial effects: a prefabricated monolithic flat slab and its construction method, which provides support for the precast slab through rod-type column caps, steel tie plate frames and support plates, all components form rigidity on their own, no support is required during construction, and no formwork is required, which makes installation convenient and saves time.

[0023] Furthermore, the top and joints of the slab in this invention are made of cast-in-place concrete, and a special template is used during the fabrication of the precast slab to provide shear protrusions. The bond between the new and old concrete is strong, which fully ensures the overall rigidity of the structure. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0025] Figure 1 This is a schematic diagram of an assembled monolithic flat floor slab spatial structure according to the present invention.

[0026] Figure 2 This is a schematic diagram of the splicing of prefabricated slabs for an integrated flat slab floor system according to the present invention.

[0027] Figure 3 This is a schematic diagram of the spatial structure of a precast, integrated, beamless floor slab splicing panel according to the present invention.

[0028] Figure 4 This is a schematic diagram of the installation space for an assembled integral flat slab column, a rod-type column cap diagonal member, and a steel tie plate frame according to the present invention.

[0029] Figure 5 This is a schematic diagram of the connection structure between the column cap diagonal brace of the assembled integral flat slab and the steel tie plate frame, the support plate and the precast slab according to the present invention.

[0030] Figure 6 This is a schematic diagram of the combined cross-section of an assembled monolithic flat slab steel tie plate frame and supporting plate according to the present invention. Figure I .

[0031] Figure 7 This is a schematic diagram of the combined cross-section of an assembled monolithic flat slab steel tie plate frame and supporting plate according to the present invention. Figure II .

[0032] Figure 8 This is a schematic diagram of an assembled monolithic precast slab floor structure according to the present invention.

[0033] Figure 9 This is a cross-sectional schematic diagram of a prefabricated, integrated, beamless floor slab structure according to the present invention.

[0034] Figure 10 This is a schematic diagram of the joint between precast slab B and precast slab C in an assembled monolithic flat slab system according to the present invention.

[0035] Figure 11 This is a schematic diagram of the joint between precast slab A and precast slab B in an assembled monolithic flat slab system according to the present invention.

[0036] Figure 12 This is a schematic diagram of a prefabricated, modular, beamless floor slab with shear-resistant protrusions according to the present invention.

[0037] In the diagram, 1-column, 2-column cap diagonal brace, 3-steel tie plate frame, 4-precast slab A, 5-precast slab B, 6-precast slab C, 7-reinforcing bar, 8-concrete, 9-steel support plate, 10-reinforcing bar with beard, 12-tied hidden beam, 13-shear reinforcement, 14-shear protrusion. Detailed Implementation

[0038] A type of prefabricated monolithic flat slab floor, such as Figure 1 As shown, the structure includes column 1, a rod-type column cap with a diagonal brace 2, and a steel tie plate frame 3 connected to the top of the diagonal brace. A steel support plate 9 is installed below the steel tie plate frame 3 to support precast slabs A4, B5, and C6. Cast-in-place joints are left between the slabs. Reinforcing bars 7 are laid on the top of the precast slabs and a layer of concrete 8 is poured.

[0039] Among them, such as Figure 4 and Figure 5 As shown, the rod-type column cap diagonal member 2 is connected to the steel tie plate frame 3 and the steel support plate 9. The plane projection direction of the rod-type column cap diagonal member 2 forms a 45-degree angle with the plane principal axis direction.

[0040] A continuous support plate 9 is installed at the four edges where the steel tie plate frame 3 intersects with the precast slab B5, such as... Figure 6 As shown, the steel support plate 9 and the steel tie plate frame 3 are implemented in the form of an I-shaped asymmetrical section or an inverted T-shaped section with a widened lower flange.

[0041] like Figures 1 to 11 As shown, the flat slab floor plan is divided into three areas—precast slab A4, precast slab B5, and precast slab C6—based on the location of column 1. Column 1 is located in the center of precast slab B5, and steel tie plate frames 3 are arranged around the perimeter of precast slab B5. Diagonal braces 2 of the column caps are supported at the four corners of precast slab B5 and connected to the steel tie plate frames 3. Slab B5 is supported on all four sides by steel support plates 9 under the steel tie plate frames 3; precast slab C6 is supported on two opposite sides by steel support plates 9 under the steel tie plate frames 3; and precast slab A4 is supported at its four corners by steel support plates 9 under the steel tie plate frames 3.

[0042] The bottom of precast slabs A4, B5, and C6 have protruding reinforcing bars 10. When there is a steel tie plate frame 3 at the slab joint, the reinforcing bars 10 can be mechanically connected by welding sleeves. When there is no steel tie plate frame 3 at the slab joint, the reinforcing bars 10 are bent up and tied together, and a hidden beam 12 is set to configure the reinforcing bars.

[0043] The reinforcing steel bars 7 at the top of the flat slab can be placed on-site or prefabricated in the factory as steel mesh, and then laid on-site on top of precast slabs A4, B5, and C6. Shear reinforcement bars 13 are provided in the aforementioned precast slabs as needed, and the reinforcing steel bars 7 are connected to the shear reinforcement bars 13.

[0044] Precast slabs A4, B5, and C6 are cast using special templates, and shear protrusions 14 can be provided on the sides and top to connect the new and old concrete.

[0045] A construction method for a prefabricated monolithic flat slab floor includes the following steps:

[0046] Step 1: Prefabricate and install column 1;

[0047] Step 2: Install the rod-type column cap diagonal braces 2 around column 1, with the rod-type column cap diagonal braces 2 forming a 45° angle with column 1;

[0048] Step 3: Assemble the steel tie plate frame 3 and the steel support plate 9. The cross-section is an inverted T-shape or an I-shape with the lower edge wider than the upper edge.

[0049] Step 4: Install the structural components assembled in Step 3 at the end of the rod-type column cap diagonal bar 2 to form a rigid spatial body;

[0050] Step 5: Install precast slab A4, precast slab B5 and precast slab C6 on steel support plate 9 and fix them with embedded parts;

[0051] Step 6: Connect the reinforcing bars 10 of precast slabs A4, B5, and C6, and tie the reinforcing bars 12 of the hidden beam.

[0052] Step 7: Lay the top reinforcement 7 of the flat slab, connect the shear reinforcement 13 to the precast steel mesh 7 and assist in positioning;

[0053] Step 8: Pour concrete on the top of precast slabs A4, B5, and C6, and at the joints, to complete the construction of the precast monolithic flat slab.

[0054] In step one, precast columns are used, and their connection to the foundation must ensure the stability of subsequent construction.

[0055] Step 3: The steel tie plate frame 3 and the steel support plate 9 can be processed and reassembled separately, or they can be combined into a single component and manufactured into a special cross-sectional shape. High-strength bolts are preferred for the installation of the rod-type column cap to facilitate subsequent positioning and adjustment. The rod-type column cap diagonal brace 2, the steel tie plate frame 3, the steel support plate 9, and the column 1 form a spatial geometry that cannot be fully tightened before achieving spatial rigidity.

[0056] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0057] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A monolithic slab-column-free floor assembly, characterized by: It includes columns (1), column caps with diagonal braces (2), steel tie plates (3), steel support plates (9), precast slab A (4), precast slab B (5), precast slab C (6), reinforcing bars (7), and concrete (8). One end of the rod-type column cap diagonal brace (2) is connected to the column (1), and the other end is connected to the top corner of the precast slab B (5) through the steel tie plate frame (3) and the steel support plate (9). The plane projection direction of the rod-type column cap diagonal brace (2) is 45° with the plane main axis direction. The precast slabs A (4), B (5), and C (6) are spliced ​​together to form a floor plan. The column (1) is located at the lower center of the precast slab B (5). The steel tie plate frame (3) is located around the precast slab B (5). The lower part of the steel tie plate frame (3) is provided with a steel support plate (9). The two opposite sides of the precast slab C (6) are supported by the steel support plate (9) and located around the precast slab B (5). The remaining two opposite sides of the precast slab A (4) and the precast slab C (6) are connected. The steel bars (7) are laid on the top of the floor slab formed by the precast slabs A (4), B (5) and C (6), and concrete (8) is poured on top of it. The cross-sections of the steel support plate (9) and the steel tie plate frame (3) are I-shaped or inverted T-shaped with the lower edge wing wider than the upper edge wing; The bottom of the precast slab A (4), precast slab B (5) and precast slab C (6) are provided with reinforcing bars (10). The reinforcing bars (10) at the joint between the precast slab C (6) and the precast slab A (4) are connected to each other, and a hidden beam (12) is provided at the connection point to provide reinforcing bars.

2. The assembled monolithic slab-column floor according to claim 1, characterized in that: Shear reinforcement bars (13) are provided on the precast slabs A (4), B (5) and C (6) as required, and the steel bars (7) are connected to the shear reinforcement bars (13).

3. The prefabricated monolithic flat slab system according to claim 1, characterized in that: The precast slabs A (4), B (5) and C (6) are cast using templates, and shear protrusions (14) are provided on the sides and top as required.

4. A construction method for a prefabricated monolithic flat slab floor system, characterized by: The preparation of a prefabricated monolithic flat slab as described in any one of claims 1 to 3 includes the following steps: And the following steps are performed in sequence. Step 1: Prefabricate and install columns (1); Step 2: Install rod-type column cap diagonal braces (2) around the column (1), with the rod-type column cap diagonal braces (2) forming a 45° angle with the column (1); Step 3: Assemble the steel tie plate frame (3) and the steel support plate (9), with a cross-section that is either an inverted T-shape or an I-shape where the lower edge is wider than the upper edge. Step 4: Install the structural components assembled in Step 3 at the end of the rod-type column cap diagonal bar (2) to form a rigid spatial body; Step 5: Install precast slab A (4), precast slab B (5) and precast slab C (6) on the steel support plate (9) and fix them with embedded parts; Step 6: Connect the reinforcing bars (10) of precast slab A (4), precast slab B (5), and precast slab C (6), and tie the reinforcing bars of the hidden beam (12); Step 7: Lay the top reinforcement (7) of the flat slab, connect the shear reinforcement (13) to the precast steel mesh and assist in positioning; Step 8: Pour concrete (8) on the top of precast slab A (4), precast slab B (5), and precast slab C (6) and at the joints of the slabs to complete the construction of the assembled monolithic flat slab.

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