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, which relates to the technical field of prefabricated buildings. The module is composed of at least two parallel steel dense-rib beams, at least one bottom plate, at least one cover plate and at least one integrated pipeline component. The steel of the steel dense-rib beam is connected to the steel bar of the bottom plate and is integrally formed by pouring concrete. The height of the precast concrete in the steel dense-rib beam is less than or equal to the difference between the design height of the steel dense-rib beam and the thickness of the cover plate. The integrated pipeline component is fixed on the bottom plate, and the cover plate is placed on the precast concrete parts of the two parallel steel dense-rib beams. The one-way dense-rib cavity floor module for steel structure of 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 amount of formwork and cast-in-place concrete in steel truss floor slabs has not been reduced, 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 there is no reliable connection between the prefabricated bottom plate and the steel dense-rib beam.

[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, consisting of at least two parallel steel dense-rib beams, at least one bottom plate, at least one cover plate and at least one integrated pipe component, wherein the steel of the steel dense-rib beam is connected to the steel bars of the bottom plate and is integrally formed by pouring concrete, the height of the precast concrete in the steel dense-rib beam is less than or equal to the difference between the design height of the steel dense-rib beam and the thickness of the cover plate, the integrated pipe component is fixed on the top of the bottom plate, and the cover plate is placed on the precast concrete parts of the two parallel steel dense-rib beams.

[0008] On the basis of the above technical solution, holes are reserved on the web or side plates of the steel in the steel multi-ribbed beam; or conduits are reserved in the holes; or the width 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 to the sides of the upper and lower flange plates of the steel section in 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 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] Based on the above technical solution, the integrated pipeline component is provided with one or more pipeline openings; or the upper surface of the integrated pipeline component close to the bottom plate 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.

[0014] On the basis of the above technical scheme, the cover plate is a cast-in-place or prefabricated reinforced concrete; or the steel bars arranged inside the cover plate extend out of the edge of the cover plate; or the width of the cover plate is greater than or equal to the net spacing value of two adjacent steel multi-ribbed beams; or the cover plate is placed on the precast concrete part of the steel multi-ribbed beam with a length of 10mm-20mm; or the bottom elevation of the cover plate is equal to the elevation of the upper flange of the steel in the steel multi-ribbed beam or the top surface of the steel; or an inspection hole or a peek hole is reserved on the cover plate, and the inspection hole or the peek hole is provided with a movable cover plate.

[0015] On the basis of the above technical scheme, two steel structures are spliced ​​with one-way prefabricated dense-rib cavity floor modules by overlapping the protruding steel bars of the bottom plate and then pouring concrete for curing; or two steel structures are spliced ​​with one-way prefabricated dense-rib cavity floor modules by inserting the corresponding two bottom plates protruding steel bars into another common steel multi-rib beam, and pouring concrete on site together with the concrete of the steel multi-rib beam to form the module, and the cover plate is cast into a whole through the exposed steel bars and the part of the steel multi-rib beam without prefabricated concrete; or two steel structures are spliced ​​with one-way dense-rib cavity floor modules by inserting the protruding steel bars of the bottom plate of the corresponding one module into a steel multi-rib beam of the other module, welding it to the web or lower flange plate of the steel multi-rib beam, and then pouring concrete on site to form the module.

[0016] On the basis of the above technical solution, a construction method of a one-way dense-rib cavity floor module for steel structure includes six steps of formwork, hoisting, module connection, pipeline laying, plate sealing and maintenance and demoulding, and is characterized by:

[0017] The formwork step is to set support poles at the joints of two unidirectional dense-rib cavity floor modules of the steel structure; or set a top plate at the top of the support pole, and the top plate and the steel dense-rib beam are firmly fixed by grooves, tongues, bolts, screws or pins;

[0018] The module connection step 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-ribbed beam of another module after the one-way multi-ribbed cavity floor modules for the 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 one-way multi-ribbed cavity floor modules for the steel structure are spliced ​​in place in pairs and pour concrete;

[0019] The pipeline laying step is to lay the horizontal pipeline on the bottom plate and reach the end interface through the integrated pipeline parts;

[0020] The plate sealing step is to set a bottom formwork on the precast concrete in the steel multi-rib beam after the connection step and pipeline laying are completed, then lay the steel bars of the cover plate on the upper part of the bottom formwork, and pour the concrete of the overlapped part of the steel multi-rib beam and the cover plate;

[0021] Or the sealing step is to lay the precast cover plate on the precast concrete in the steel multi-ribbed beam after the connection step and the laying of pipelines are completed, and to pour concrete between the overlapping parts of the steel multi-ribbed beam and the precast cover plate.

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] (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 in public buildings, even those with larger spans.

[0024] (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.

[0025] (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

[0026] 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;

[0027] 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;

[0028] 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;

[0029] 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.

[0030] In the figure: 1-steel multi-rib beam, 2-bottom plate, 3-cover plate, 4-integrated pipe fittings, 5-holes, 7-stiffeners, 8-longitudinal reinforcements, 9-supporting uprights, 10-top plate. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0032] See also Figure 1The figure shows the overall structure schematic diagram of a one-way dense-rib cavity floor module for steel structure in an embodiment of the present invention, which is composed of at least two parallel steel dense-rib beams 1, at least one base plate 2, at least one cover plate 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 by concrete. The height of the precast concrete in the steel dense-rib beam 1 is less than or equal to the difference between the design height of the steel dense-rib beam 1 and the thickness of the cover plate 3. The integrated pipe component 4 is fixed on the top of the base plate 2, and the cover plate 3 is placed on the precast concrete parts of the two parallel steel dense-rib beams 1.

[0033] 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 width of the steel multi-ribbed beam 1 is greater than or equal to the width of the upper flange of the steel or the width of the steel. 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.

[0034] 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, which is a common span for protecting such a module.

[0035] The upper and lower flange plates of the steel in 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 in the multi-rib beam 1 and the steel multi-rib beam 1 and the concrete can also more effectively improve the shear strength of the multi-rib beam, thereby reducing the height of the steel multi-rib beam 1, which not only improves the use of the function in the house, but also saves the construction cost.

[0036] 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.

[0037] 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 multi-ribbed beam and increase the reliability of the connection between the bottom plate and the multi-ribbed beam.

[0038] 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.

[0039] The cover plate 3 is a cast-in-place or prefabricated reinforced concrete; or the steel bars arranged inside the cover plate 3 extend out of the edge of the cover plate 3; or the width of the cover plate 3 is greater than or equal to the net spacing value of two adjacent steel multi-ribbed beams 1; or the cover plate 3 is placed on the precast concrete part of the steel multi-ribbed beam 1 with a placement length of 10mm-20mm; or the bottom elevation of the cover plate 3 is equal to the elevation of the upper flange of the steel section or the top surface of the steel section in the steel multi-ribbed beam 1; or an inspection hole or a peek hole is reserved on the cover plate 3, and the inspection hole or the peek hole is provided with a movable cover plate.

[0040] See also 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 prefabricated dense-rib cavity floor modules for steel structure are spliced ​​by overlapping the extended steel bars of the bottom plate 2 and pouring concrete at the connection part, and then pouring concrete at the overlapped part of the steel dense-rib beam 1 and the cover plate 3 for curing and forming;

[0041] See also 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 prefabricated dense-rib cavity floor modules for steel structure are spliced ​​by inserting the extended steel bars of the corresponding two bottom plates 2 into another common steel multi-rib beam 1, and the concrete is cast on site together with the concrete of the steel multi-rib beam 1. The cover plate 3 is cast as a whole through the exposed steel bars and the part of the steel multi-rib beam 1 without prefabricated concrete.

[0042] See also Figure 4 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 protruding steel bars of the bottom plate 2 of the corresponding module into a steel multi-rib beam 1 of the other module, welding them to the web plate or lower flange plate of the steel multi-rib beam 1, and then pouring concrete on site to form them.

[0043] See also Figure 2 , Figure 3 and 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 steel structure in an embodiment of the present invention. 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 demolding:

[0044] The formwork step is to set support posts 9 at the joints of two unidirectional dense-rib cavity floor modules for steel structures; or set a top plate 10 at the top of the support posts 9, and the top plate 10 and the steel dense-rib beam 1 are firmly fixed by grooves, tongues, studs, screws or pins;

[0045] The module connection step 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 one-way multi-rib cavity floor modules for the 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 one-way multi-rib cavity floor modules for the steel structure are spliced ​​in place in pairs and concrete is poured;

[0046] The pipeline laying step is to lay the horizontal pipeline on the bottom plate 2 and reach the end interface through the integrated pipeline 4;

[0047] The plate sealing step is to set a bottom template on the precast concrete in the steel multi-ribbed beam 1 after the connection step and pipeline laying are completed, and then lay the steel bars of the cover plate 3 on the upper part of the bottom template, and pour the concrete of the overlapped part of the steel multi-ribbed beam 1 and the cover plate 3;

[0048] Or the sealing step is to lay the prefabricated cover plate 3 on the prefabricated concrete in the steel multi-ribbed beam 1 after the connection step and the laying of pipelines are completed, and to pour concrete between the overlapping parts of the steel multi-ribbed beam 1 and the cover plate 3.

[0049] 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 in public buildings, even public buildings with larger spans.

[0050] 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.

[0051] 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 a steel structure, comprising at least two parallel multi-rib steel beams (1), at least one bottom plate (2), at least one cover plate (3) and at least one integrated pipe member (4), Features: The steel of the steel multi-ribbed beam (1) is connected to the steel bars of the bottom plate (2) and is integrally formed by pouring concrete. The height of the precast concrete in the steel multi-ribbed beam (1) is less than or equal to the difference between the design height of the steel multi-ribbed beam (1) and the thickness of the cover plate (3). The integrated pipe member (4) is fixed on the top of the bottom plate (2), and the cover plate (3) is placed on the precast concrete parts of the two parallel steel multi-ribbed beams (1). The bottom plate (2) is provided with steel bars, and longitudinal steel bars (8) are arranged perpendicular to the ends of the steel bars and are arranged 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 cross section of the steel multi-ribbed beam (1) is in the shape of an I; The cover plate (3) is formed into a whole by post-casting the exposed steel bars and the portion of the steel multi-rib beam (1) without precast concrete.

2. A one-way dense-rib cavity floor module for steel structure as claimed in claim 1, Features: A hole (5) is reserved on the web or side plate of the steel in the steel multi-ribbed beam (1); or a conduit is reserved in the hole (5); or the width 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.

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

4. A one-way dense-rib cavity floor module for steel structure as claimed in claim 1, Features: The upper and lower flange plates of the steel section in the steel section multi-rib beam (1) are welded with stiffeners (7) on their sides. The stiffeners (7) are one or a combination of steel bars, steel plate strips, and steel mesh.

5. The one-way dense-rib cavity floor module for steel structure as claimed in claim 1, Features: Or the steel section in the steel ribbed beam (1) is a light steel composite structure.

6. A one-way dense-rib cavity floor module for steel structure as claimed in claim 1, Features: 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.

7. The one-way dense-rib cavity floor module for steel structure as claimed in claim 1, Features: The cover plate (3) is a reinforced concrete cast-in-place or prefabricated structure; or the steel bars arranged inside the cover plate (3) extend beyond the edge of the cover plate (3); or the width of the cover plate (3) is greater than or equal to the net spacing value between two adjacent steel multi-rib beams (1); or the cover plate (3) is placed on the prefabricated concrete portion of the steel multi-rib beam (1) for a length of 10 mm to 20 mm; or the bottom elevation of the cover plate (3) is equal to the elevation of the upper flange of the steel section or the top surface of the steel section of the steel multi-rib beam (1); or an inspection hole or a probe hole is reserved on the cover plate (3), and the inspection hole or the probe hole is provided with a movable cover plate.

8. The one-way dense-rib cavity floor module for steel structure as claimed in claim 1, Features: The two steel structures are connected by lap-jointing the outwardly extending steel bars of the bottom plate (2) and then pouring concrete to cure the slab; or the two steel structures are connected by inserting the outwardly extending steel bars of the two bottom plates (2) into another common steel beam, and then pouring concrete together with the concrete of the steel beam on site to form the slab, and then pouring the cover plate (3) into a whole with the exposed steel bars and the part of the steel beam without precast concrete; or the two steel structures are connected by lap-jointing the outwardly extending steel bars of the bottom plate (2) of one module and then pouring concrete on site to form the slab.

9. A construction method for a one-way dense rib cavity floor module for a steel structure, using the one-way dense rib cavity floor module for a steel structure according to any one of claims 1 to 8, comprising six steps of formwork, hoisting, module connection, pipeline laying, plate sealing, and maintenance and demoulding. Features: The formwork step comprises: arranging support posts (9) at the joints of two unidirectional dense-rib cavity floor modules of the steel structure; or arranging a top plate (10) at the top of the support posts (9); the top plate (10) and the steel dense-rib beam (1) are securely fixed by using notches, tongues, bolts, screws or latches; The module connection step comprises welding the steel bars in the bottom plate (2) of one module to the web plate or lower flange plate of the steel multi-ribbed beam (1) of another module after the one-way multi-ribbed cavity floor modules for the steel structure are spliced ​​in place in pairs, or connecting 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 one-way multi-ribbed cavity floor modules for the steel structure are spliced ​​in place in pairs and pouring concrete; The pipeline laying step is to lay a horizontal pipeline on the bottom plate (2) and reach the end interface through the integrated pipeline component (4); The plate sealing step is to set a bottom formwork on the precast concrete in the steel multi-ribbed beam (1) after the connection step and the laying of pipelines are completed, then lay the steel bars of the cover plate (3) on the upper part of the bottom formwork, and pour concrete at the overlapped part of the steel multi-ribbed beam (1) and the cover plate (3); Or the sealing step is to lay the prefabricated cover plate (3) on the prefabricated concrete in the steel multi-ribbed beam (1) after the connection step and the laying of pipelines are completed, and to pour concrete between the overlapping parts of the steel multi-ribbed beam (1) and the prefabricated cover plate (3).

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