One-way dense-rib cavity floor module for steel structure and construction method thereof

Abstract

The invention discloses a one-way dense-rib cavity floor module for steel structure and a construction method thereof, and relates to the technical field of prefabricated buildings. The one-way dense-rib cavity floor module for steel structure is prefabricated and formed into one piece by at least two parallel steel dense-rib beams, at least one bottom plate, at least one cavity component and at least one integrated pipeline component. The steel of the steel dense-rib beam is connected with the steel bars of the bottom plate and are cast into one piece by concrete. The integrated pipeline component is fixed on the bottom plate, and the cavity component is located between the two parallel steel dense-rib beams and fixed on the bottom plate. The one-way dense-rib cavity floor module for steel structure in the invention can save construction time, eliminate the need for formwork, reduce the number of formwork support rods, save construction period, and effectively reduce costs.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated buildings, and in particular to a one-way dense-rib cavity floor module for a steel structure and a construction method thereof. Background Art

[0002] At present, in addition to cast-in-place concrete slabs, the only steel truss floor slabs used in steel structure floor slabs are steel truss floor slabs. Compared with cast-in-place concrete slabs, the steel truss floor slabs do not reduce the amount of formwork and cast-in-place concrete, but the number of horizontal formworks has been reduced. Therefore, it is not a truly prefabricated construction method; it can neither save construction time nor reduce labor, especially the workload of wet work, and it cannot save construction costs. The composite slabs that are currently more commonly used in reinforced concrete structures have a relatively small suitable span and a relatively large self-weight of the slab. The amount of cast-in-place wet work on the composite slabs is also not small. In addition, the thickness of the floor slab using this type of composite slab will increase, reducing the net height of the building, which is not conducive to user use. Therefore, basically this type of reinforced concrete composite slab is rarely used in steel structure floors.

[0003] In recent years, the concrete dense-rib cavity floor system has been widely used in prefabricated concrete structures and has also been tried in steel structure projects. For example, a utility model patent for a cast-in-place concrete dark dense-rib plateless hollow floor (patent number ZL200420103009.7) discloses a technical solution of combining prefabricated cavity components and cast-in-place concrete steel dense-rib beams to form a concrete dense-rib cavity floor, but this is a cast-in-place steel dense-rib beam and cast-in-place slab method, which does not belong to prefabricated buildings; for another example, an invention patent for a bidirectional dense-rib cavity floor and its construction method (patent number ZL201310490037.2) discloses a technical solution of combining a steel dense-rib beam and a prefabricated reinforced concrete slab to form a dense-rib cavity floor. Although this type of floor and method can be included in the prefabricated building technology, its construction method is relatively complicated, and the prefabricated bottom plate and the steel beam are not reliably connected.

[0004] In response to these problems, combined with the characteristics of the steel structure itself, it is now urgent to develop a new type of assembled dense-rib cavity module that is suitable for integration with steel structure construction methods. Summary of the invention

[0005] In view of the defects existing in the prior art, the object of the present invention is to provide a one-way dense-rib cavity floor module for steel structure and a construction method thereof.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0007] A one-way dense-rib cavity floor module for steel structure is prefabricated into one piece by at least two parallel steel dense-rib beams, at least one bottom plate, at least one cavity component and at least one integrated pipe component. The steel of the steel dense-rib beam is connected to the steel bars of the bottom plate and are cast into one piece by concrete. The integrated pipe component is fixed on the bottom plate, and the cavity component is located between the two parallel steel dense-rib beams and fixed on the bottom plate.

[0008] On the basis of the above technical scheme, holes are reserved on the web or side plates of the steel in the steel multi-ribbed beam; or a conduit is reserved in the hole; or the concrete within the height h range in the steel multi-ribbed beam is prefabricated together with the concrete of the bottom plate, and the height h of the prefabricated concrete inside the steel multi-ribbed beam is less than or equal to the sum of the thickness of the cavity component and the thickness of the bottom plate; or the width b of the steel multi-ribbed beam is the net distance between two adjacent cavity components; or the width b of the steel multi-ribbed beam is greater than or equal to the width of the upper flange of the steel of the steel multi-ribbed beam or the width of the steel.

[0009] On the basis of the above technical solution, the center distance of the steel dense-ribbed beam is 600-1200mm; or the height of the steel dense-ribbed beam is 200-1500mm; or the width of the steel dense-ribbed beam is 100-400mm; or the number of the steel dense-ribbed beam is 2, 3 or 4.

[0010] On the basis of the above technical solution, stiffeners are welded on the sides of the upper and lower flange plates of the medium steel of the steel multi-rib beam, and the stiffeners are one or a combination of steel bars, steel plate strips, and steel mesh.

[0011] On the basis of the above technical solution, the cross section of the steel section in the steel multi-ribbed beam is one or a combination of the shapes of "I", "O", "T", and "L"; or the steel section in the steel multi-ribbed beam is a light steel composite structure.

[0012] On the basis of the above technical scheme, steel bars, steel mesh or prestressed bars are arranged in the bottom plate; or when steel bars are arranged in the bottom plate and vertically connected to the steel multi-ribbed beam, longitudinal steel bars are arranged at the end of the vertical steel bars along the direction of the steel multi-ribbed beam, and the longitudinal steel bars are welded to the web or lower flange plate of the steel in the steel multi-ribbed beam; or the steel bars in the bottom plate perpendicular to the steel multi-ribbed beam pass through the web or side plate of the steel multi-ribbed beam and extend outward in one or two directions, so that the prefabricated bottom plate is single-sidedly or double-sidedly extended to the outside of the steel multi-ribbed beam, and the bottom plate has bottom bars extending out of the plate edge.

[0013] On the basis of the above technical solution, the integrated pipe component is provided with one or more pipeline openings; or a reserved junction box, an electrical fixing base, a power socket, a temperature sensing fire alarm monitoring device or a combination thereof is provided on the upper surface of the integrated pipe component close to the bottom plate; or the integrated pipe component is located on the bottom plate inside the cavity component; or the integrated pipe component is located on the bottom plate between two cavity components.

[0014] Based on the above technical solution, the cavity component is a pentahedral structure surrounded by hard material, with its opening facing the base plate and firmly connected to the base plate; or the cavity component is a hexahedral structure surrounded by hard material and connected to the base plate; or the cavity component is a lightweight six-sided solid body.

[0015] Based on the above technical solution, the width of the cavity component is less than or equal to the net distance between the upper flange plates of two adjacent steel multi-ribbed beams; the height of the sum of the thickness of the cavity component and the bottom plate is less than or equal to the total height of the two steel multi-ribbed beams.

[0016] On the basis of the above technical scheme, two steel structures are spliced ​​with one-way dense-rib cavity floor modules by overlapping the extended steel bars of the bottom plate and then pouring concrete for curing, and installing cavity components at the connection parts; or two steel structures are spliced ​​with one-way dense-rib cavity floor modules by inserting the extended steel bars of the corresponding two bottom plates into a common steel beam, and pouring concrete on site together with the concrete of the steel beam; or two steel structures are spliced ​​with one-way dense-rib cavity floor modules by inserting the extended steel bars of the bottom plate of one module into a steel dense-rib beam of the other module, welding them to the web or lower flange plate of the steel dense-rib beam, and then pouring concrete on site.

[0017] On the basis of the above technical scheme, a construction method of a one-way dense-rib cavity floor module for steel structure includes six steps: formwork, hoisting, module connection, pipeline laying, plate sealing, and maintenance and demoulding:

[0018] Formwork is to set supporting poles at the joints of two unidirectional dense-rib cavity floor modules of steel structure; or set top plates at the top of supporting poles, and the top plates and steel of steel dense-rib beams are fixed firmly by grooves, tongues, studs, screws or pins;

[0019] The module connection is to weld the steel bars in the bottom plate of one module to the web plate or lower flange plate of the steel multi-rib beam of another module after the modules of the one-way multi-rib cavity floor for steel structure are spliced ​​in place in pairs; or to connect the steel bars in the bottom plate of one module to the steel bars in the bottom plate of another module after the modules of the one-way multi-rib cavity floor for steel structure are spliced ​​in place in pairs, pour concrete, and install cavity components at the connection position;

[0020] Laying pipelines means laying horizontal pipelines on the bottom plate and reaching the end interface through integrated pipeline parts;

[0021] After the connection steps and pipeline laying are completed, the steel bars of the panel are laid on the upper part of the steel multi-rib beam and the cavity component, and the concrete of the overlapped part of the steel multi-rib beam and the panel is poured;

[0022] Or sealing plate is to lay prefabricated panels on the upper part of steel multi-rib beams and cavity components respectively after the module connection and pipeline laying are completed, and concrete is poured between the overlapping parts of steel multi-rib beams and prefabricated panels.

[0023] Compared with the prior art, the advantages of the present invention are:

[0024] (1) Compared with the prior art, the one-way dense-rib cavity floor module for steel structure in the present invention has greater rigidity and bearing capacity, and is suitable for solving the problem of prefabricated floor slabs in buildings of large volume but small span, such as residential buildings, and is also suitable for solving the problem of prefabricated floor slabs with larger spans.

[0025] (2) The one-way dense-rib cavity floor module for steel structure in the present invention is completely formwork-free and has a high prefabrication rate, which saves construction time and effectively reduces costs. The construction can be quickly completed according to the construction plan.

[0026] (3) The one-way dense-rib cavity floor module for steel structure in the present invention has a reasonable layout, which not only reduces the deadweight of the floor, but also increases the indoor net height and reduces the project cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of a one-way dense-rib cavity floor module for a steel structure in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the construction and assembly structure of a one-way dense-rib cavity floor module for a steel structure in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the construction and assembly structure of a one-way dense-rib cavity floor module for a steel structure in an embodiment of the present invention;

[0030] Figure 4 The present invention is a schematic diagram of the construction and assembly structure of a one-way dense-rib cavity floor module for a steel structure in an embodiment of the present invention.

[0031] In the figure: 1-steel multi-rib beam, 2-bottom plate, 3-cavity member, 4-integrated pipe member, 5-hole, 7-stiffener, 8-longitudinal reinforcement, 9-supporting vertical pole, 10-top plate, 13-panel. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0033] See also Figure 1The schematic diagram of the structure of a one-way dense-rib cavity floor module for steel structure in an embodiment of the present invention is shown, a one-way dense-rib cavity floor module for steel structure, which is prefabricated into one piece by at least two parallel steel dense-rib beams 1, at least one base plate 2, at least one cavity component 3 and at least one integrated pipe component 4, the steel of the steel dense-rib beam 1 is connected to the steel bars of the base plate 2, and are cast into one piece by concrete, the integrated pipe component 4 is fixed on the base plate 2, and the cavity component 3 is located between the two parallel steel dense-rib beams 1 and fixed on the base plate 2.

[0034] Holes 5 are reserved on the web or side plates of the steel in the steel multi-ribbed beam 1; or conduits are reserved in the holes 5; or the concrete within the height h of the steel multi-ribbed beam 1 is prefabricated together with the concrete of the bottom plate 2, and the height h of the prefabricated concrete inside the steel multi-ribbed beam 1 is less than or equal to the sum of the thickness of the cavity member 3 and the thickness of the bottom plate 2; or the width b of the steel multi-ribbed beam 1 is the net distance between two adjacent cavity members 3; or the width b of the steel multi-ribbed beam 1 is greater than or equal to the width of the steel upper flange or the steel of the steel multi-ribbed beam 1. These design schemes can facilitate the passage of concrete, the passage of bottom plate steel bars through beams, or the passage of pipes through beams when necessary.

[0035] The center distance of the steel multi-rib beam 1 is 600-1200 mm; or the height of the steel multi-rib beam 1 is 200-1500 mm; or the width of the steel multi-rib beam 1 is 100-400 mm; or the number of the steel multi-rib beam 1 is 2, 3 or 4. Here is a conventional size, which is a common span for protecting such a module.

[0036] The upper and lower flange plates of the steel multi-rib beam 1 are welded with stiffeners 7, which are one or a combination of steel bars, steel strips, and steel mesh. Strengthening the connection performance between the precast or post-cast concrete and the steel in the steel multi-rib beam 1 can also more effectively improve the shear strength of the steel multi-rib beam 1, thereby reducing the height of the steel multi-rib beam 1, which not only improves the use of the function of the house, but also saves the construction cost.

[0037] The cross section of the steel section in the steel section multi-ribbed beam 1 is one of the shapes of "I", "O", "T", "L" or a combination thereof; or the steel section in the steel section multi-ribbed beam 1 is a light steel composite structure.

[0038] The bottom plate 2 is provided with steel bars, steel mesh or prestressed bars; or when the bottom plate 2 is provided with steel bars and vertically connected to the steel multi-ribbed beam 1, the end of the vertical steel bars is provided with longitudinal steel bars 8 along the direction of the steel multi-ribbed beam 1, and the longitudinal steel bars 8 are welded to the web or lower flange plate of the steel multi-ribbed beam 1, or the steel bars in the bottom plate 2 perpendicular to the steel multi-ribbed beam 1 pass through the web or side plate of the steel multi-ribbed beam 1 and extend outward in one or two directions, so that the prefabricated bottom plate 2 is single-sidedly or double-sidedly extended to the outside of the steel multi-ribbed beam 1, and the bottom plate 2 has bottom bars extending out of the plate edge. Such an arrangement can reduce the number of welding points between the steel bars and the steel multi-ribbed beam 1 and increase the reliability of the connection between the bottom plate and the steel multi-ribbed beam 1.

[0039] The integrated pipe component 4 is provided with one or more pipeline inlets and outlets; or the integrated pipe component 4 is connected with the hole 5 or the conduit; or the upper surface of the integrated pipe component 4 near the bottom plate 2 is provided with one or several combinations of a reserved junction box, an electrical fixing base, a power socket, and a temperature-sensing fire alarm monitoring device; or the integrated pipe component 4 is located on the bottom plate 2 inside the cavity component 3; or the integrated pipe component 4 is located on the bottom plate 2 in the groove between two cavity components 3.

[0040] The cavity component 3 is a pentahedral structure surrounded by hard material, with its opening facing the base plate 2 and firmly connected to the base plate 2; or the cavity component 3 is a hexahedral structure surrounded by hard material or a pentahedron with an opening at the lower end, and firmly connected to the base plate 2; or the cavity component 3 is a lightweight six-sided solid body.

[0041] The width of the cavity component 3 is less than or equal to the net distance between the upper flange plates of two adjacent steel multi-ribbed beams 1; the height of the sum of the thickness of the cavity component 3 and the bottom plate 2 is less than or equal to the total height of the two steel multi-ribbed beams 1.

[0042] Reference Figure 2 The figure shows a schematic diagram of the construction and assembly structure of a one-way dense rib cavity floor module for steel structure in an embodiment of the present invention. Two one-way dense rib cavity floor modules for steel structure are spliced ​​by overlapping the extended steel bars of the bottom plate 2 and then pouring concrete for curing, and a cavity component is installed at the connection position;

[0043] Reference Figure 3 The figure shows a schematic diagram of the construction and assembly structure of a one-way dense rib cavity floor module for steel structure in an embodiment of the present invention. Two one-way dense rib cavity floor modules for steel structure are spliced ​​by inserting the extended steel bars of the corresponding two bottom plates 2 into a common steel beam, and the concrete is poured on site together with the concrete of the steel beam to form the concrete;

[0044] Reference Figure 4The figure shows a schematic diagram of the construction and assembly structure of a one-way dense-rib cavity floor module for steel structure in an embodiment of the present invention. Two one-way dense-rib cavity floor modules for steel structure are spliced ​​by inserting the extended steel bars of the bottom plate 2 of one module into a steel dense-rib beam 1 of the other module, welding them to the web plate or lower flange plate of the steel dense-rib beam 1, and then pouring concrete on site to form them.

[0045] Reference Figure 2 , Figure 3 , Figure 4 The following are schematic diagrams of the construction and assembly structure of a one-way dense rib cavity floor module for steel structure in an embodiment of the present invention, and a construction method of a one-way dense rib cavity floor module for steel structure, including six steps of formwork, hoisting, module connection, pipeline laying, plate sealing, and maintenance and demoulding:

[0046] The formwork is to set support poles 9 at the joints of two unidirectional dense-rib cavity floor modules for steel structure; or set a top plate 10 at the top of the support pole 9, and the top plate 10 and the steel of the steel dense-rib beam 1 are firmly fixed by grooves, tongues, bolts, screws or pins;

[0047] The module connection is to weld the steel bars in the bottom plate 2 of one module to the web plate or lower flange plate of the steel multi-rib beam 1 of another module after the modules of the one-way dense rib cavity floor for steel structure are spliced ​​in place in pairs; or to connect the steel bars in the bottom plate 2 of one module to the steel bars in the bottom plate 2 of another module after the modules of the one-way dense rib cavity floor for steel structure are spliced ​​in place in pairs, pour concrete, and install cavity components at the connection position;

[0048] Laying pipelines is to lay horizontal pipelines on the bottom plate 2 and reach the end interface through the integrated pipeline parts 4;

[0049] After the connection steps and pipeline laying are completed, the steel bars of the panel 13 are laid on the upper part of the steel multi-ribbed beam 1 and the cavity member 3, and the concrete of the overlapped part of the steel multi-ribbed beam 1 and the panel 13 is poured;

[0050] Or the sealing plate is to lay the prefabricated panels 13 on the upper part of the steel multi-ribbed beam 1 and the cavity component 3 respectively after the module connection and pipeline laying are completed, and the concrete between the overlapping parts of the steel multi-ribbed beam 1 and the prefabricated panels 13 is poured.

[0051] Compared with the prior art, the one-way dense-rib cavity floor module for steel structure in the present invention has greater rigidity and bearing capacity, and is suitable for solving the problem of prefabricated floor slabs in large-volume but small-span buildings such as residential buildings, and is also suitable for solving the problem of prefabricated floor slabs with larger spans.

[0052] The one-way dense rib cavity floor module for steel structure in the present invention is completely formwork-free and has a high prefabrication rate, which saves construction time and effectively reduces costs. The construction can be quickly completed according to the construction plan. The one-way dense rib cavity floor module for steel structure in the present invention has a reasonable layout, which not only reduces the deadweight of the floor, but also increases the indoor net height and reduces the project cost.

[0053] The present invention is not limited to the above-mentioned embodiments. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A one-way multi-rib cavity floor module for steel structure, which is prefabricated into one piece by at least two parallel multi-rib steel beams (1), at least one bottom plate (2), at least one cavity member (3) and at least one integrated pipe member (4), characterized in that: The steel sections of the steel multi-rib beam (1) are connected to the steel bars of the bottom plate (2) and are integrally formed by pouring concrete; the integrated pipe member (4) is fixed on the bottom plate (2); and the cavity member (3) is located between two parallel steel multi-rib beams (1) and is fixed on the bottom plate (2); The bottom plate (2) is provided with steel bars, and the ends of the vertical steel bars are provided with longitudinal steel bars (8) along the direction of the steel multi-ribbed beam (1), and the longitudinal steel bars (8) are welded to the web plate or the lower flange plate of the steel multi-ribbed beam (1); The cavity component (3) is a pentahedral structure surrounded by a hard material, with an opening facing the bottom plate (2) and connected to the bottom plate (2); The concrete within the height h of the steel multi-ribbed beam (1) is prefabricated together with the concrete of the bottom plate (2); the height h of the prefabricated concrete inside the steel multi-ribbed beam (1) is less than or equal to the sum of the thickness of the cavity component (3) and the thickness of the bottom plate (2); the width b of the steel multi-ribbed beam (1) is the net distance between two adjacent cavity components (3); the width b of the steel multi-ribbed beam (1) is greater than or equal to the width of the upper flange of the steel of the steel multi-ribbed beam (1) or the width of the steel; The width of the cavity component (3) is less than or equal to the clear distance between the middle steel upper flange plates of two adjacent steel multi-ribbed beams (1); the height of the cavity component (3) and the sum of the thicknesses of the bottom plate (2) is less than or equal to the total height of the middle steel of the two steel multi-ribbed beams (1); The upper and lower flange plates of the middle steel of the steel multi-rib beam (1) are welded with stiffeners (7) on their sides, and the stiffeners (7) are used to strengthen the connection performance between the precast or post-cast concrete in the steel multi-rib beam (1) and the steel. Prefabricated panels (13) are laid on the upper parts of the steel multi-ribbed beam (1) and the cavity component (3), and concrete is poured between the overlapping parts of the steel multi-ribbed beam (1) and the prefabricated panels (13).

2. A one-way dense-rib cavity floor module for steel structure according to claim 1, characterized in that: Holes (5) are reserved on the web or side plates of the steel in the steel multi-rib beam (1); or conduits are reserved in the holes (5).

3. The one-way dense-rib cavity floor module for steel structure according to claim 1, characterized in that: The center distance of the steel multi-ribbed beam (1) is 600-1200 mm; or the height of the steel multi-ribbed beam (1) is 200-1500 mm; or the width of the steel multi-ribbed beam (1) is 100-400 mm; or the number of the steel multi-ribbed beam (1) is 2, 3 or 4.

4. The one-way dense-rib cavity floor module for steel structure according to claim 1, characterized in that: The reinforcement (7) is one or a combination of steel bars, steel strips, and steel mesh.

5. The one-way dense-rib cavity floor module for steel structure according to claim 1, characterized in that: The cross section of the steel section in the steel section multi-rib beam (1) is one of the shapes of "I", "O", "T", and "L", or a combination thereof; or the steel section in the steel section multi-rib beam (1) is a light steel composite structure.

6. The one-way dense-rib cavity floor module for steel structure according to claim 1, characterized in that: The integrated pipe component (4) is provided with one or more pipeline openings; or the upper surface of the integrated pipe component (4) close to the bottom plate (2) is provided with one or a combination of a reserved junction box, an electrical appliance fixing base, a power socket, and a temperature sensing fire alarm monitoring device; or the integrated pipe component (4) is located on the bottom plate (2) inside the cavity component (3); or the integrated pipe component (4) is located on the bottom plate (2) between two cavity components (3).

7. The one-way dense-rib cavity floor module for steel structure according to claim 1, characterized in that: The two steel structures are connected by lap-jointing the extended steel bars of the bottom plate (2), then pouring concrete for curing and forming, and installing a cavity component at the connection position; or the two steel structures are connected by inserting the extended steel bars of the corresponding two bottom plates (2) into a common steel beam, and then pouring concrete on site together with the concrete of the steel beam to form the joint; or the two steel structures are connected by lap-jointing the extended steel bars of the bottom plate (2) of one module, then inserting the extended steel bars of the bottom plate (2) of one module into a steel beam (1) of the other module, and then welding the extended steel bars to the web plate or the lower flange plate of the steel beam (1), and then pouring concrete on site to form the joint.

8. A construction method for a one-way dense rib cavity floor module for steel structure, using the one-way dense rib cavity floor module for steel structure according to any one of claims 1 to 7, comprising six steps of formwork, hoisting, module connection, pipeline laying, plate sealing, and maintenance and demoulding, characterized in that: The formwork is to set support posts (9) at the joints of two unidirectional dense-rib cavity floor modules for steel structures; or to set a top plate (10) at the top of the support posts (9), and the top plate (10) and the steel of the steel dense-rib beam (1) are firmly fixed by using notches, tongues and grooves, bolts, screws or pins; The module connection is that after the modules of the one-way dense rib cavity floor for steel structure are spliced ​​in place in pairs, the steel bars in the bottom plate (2) of one module are welded to the web plate or lower flange plate of the steel dense rib beam (1) of another module; or after the modules of the one-way dense rib cavity floor for steel structure are spliced ​​in place in pairs, the steel bars in the bottom plate (2) of one module are connected to the steel bars in the bottom plate (2) of another module, concrete is poured, and a cavity component is installed at the connection position; The pipeline laying process is to lay a horizontal pipeline on the bottom plate (2) and reach the end interface through the integrated pipeline component (4); The sealing step is to lay the steel bars of the panel (13) on the upper part of the steel multi-ribbed beam (1) and the cavity component (3) after the connection step and the laying of the pipeline are completed, and to pour concrete at the overlapping part of the steel multi-ribbed beam (1) and the panel (13); Or the sealing plate is to lay the prefabricated panels (13) on the upper part of the steel multi-ribbed beam (1) and the cavity component (3) respectively after the module connection and pipeline laying are completed, and the concrete is poured between the overlapping parts of the steel multi-ribbed beam (1) and the prefabricated panels (13).

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