A bidirectional dense-rib cavity floor module for steel structure and construction method thereof

By designing a bidirectional dense rib cavity floor module, the combination of longitudinal and transverse steel dense rib beams and reinforced concrete base plates and on-site pouring technology, the problems of complex construction of steel structure floors and small span design are solved, and the problem of small span design of steel structure floors is realized. Efficient and low-cost construction is suitable for larger span buildings and improves the efficiency of building use.

CN114250897BActive Publication Date: 2024-12-24HUBEI SYNTHETIC SPACE TECH CO LTD
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Patent Information

Application Number
CN202111660895.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-12-31
Publication Date
2024-12-24
Estimated Expiration
2041-12-31

AI Technical Summary

Technical Problem

The construction process of existing steel structure floors is complex, the prefabricated base plate and steel are unreliable, and it cannot effectively save construction period and cost. It is suitable for floor designs with small spans to reduce the net height of the building, limiting the efficiency of the building.

Method used

A two-way dense cavity floor module consisting of at least 2 longitudinal steel dense rib beams, 2 transverse steel dense rib beams, 1 reinforced concrete base plate, 1 cover plate and 1 integrated pipe fitting, and is poured through concrete Form rigid connections, holes and conduits are reserved to improve connection strength, and the structure is strengthened by reinforcement and reinforcement. After the module is spliced, concrete is poured on site.

Benefits of technology

It has achieved high prefabrication rate and high industrialization steel structure modules, with strong stiffness and bearing capacity, suitable for larger span buildings, reduces the self-weight of the building, increases the indoor net height, and reduces the project cost, and completes the construction quickly. , eliminates the mold support step.

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Abstract

The invention discloses a bidirectional dense-rib cavity floor module for steel structure and a construction method thereof, and relates to the technical field of prefabricated buildings. The bidirectional dense-rib cavity floor module for steel structure consists of at least two parallel longitudinal steel dense-rib beams, at least two parallel transverse steel dense-rib beams, at least one reinforced concrete base plate, at least one reinforced concrete cover plate and at least one integrated pipeline component. The steel sections in the longitudinal steel dense-rib beams and / or the transverse steel dense-rib beams are connected to the steel bars of the base plate and are integrally cast by concrete. The cover plate is placed on the precast concrete parts of the two parallel longitudinal steel dense-rib beams and / or the transverse steel dense-rib beams. The bidirectional dense-rib cavity floor module for steel structure in the invention has a high degree of industrialization, saves construction time, reduces the number of formwork support rods, saves construction period, and can effectively reduce costs.
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Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated buildings, and in particular to a bidirectional 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 process; 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 a prefabricated cover plate and a cast-in-place concrete steel dense-rib beam to form a concrete dense-rib cavity floor, but this is a cast-in-place steel dense-rib beam and cast-in-place plate 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 process can be included in the prefabricated building technology, its construction process is relatively complicated, and there is no reliable connection between the prefabricated bottom plate and the steel.

[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 technology. 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 bidirectional 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 bidirectional dense-rib cavity floor module for steel structure, consisting of at least two parallel longitudinal steel dense-rib beams, at least two parallel transverse steel dense-rib beams, at least one reinforced concrete base plate, at least one cover plate and at least one integrated pipe component, the steel sections in the longitudinal steel dense-rib beams and / or the transverse steel dense-rib beams are connected to the steel bars of the base plate and are integrally formed by pouring concrete, the height of the precast concrete in the longitudinal steel dense-rib beams and / or the transverse steel dense-rib beams is less than or equal to the difference between the design height of the steel dense-rib beams and the thickness of the cover plate, the integrated pipe component is fixed on the top of the base plate, and the cover plate is placed on the precast concrete parts of the two parallel longitudinal steel dense-rib beams and / or the transverse 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 longitudinal steel multi-ribbed beam and / or the transverse steel multi-ribbed beam; or conduits are reserved in the holes; or the width of the longitudinal steel multi-ribbed beam and / or the transverse steel multi-ribbed beam is greater than or equal to the width of the upper flange of the steel of the longitudinal steel multi-ribbed beam and / or the transverse steel multi-ribbed beam or the width of the steel.

[0009] On the basis of the above technical scheme, the center distance of the longitudinal steel multi-ribbed beams and / or the transverse steel multi-ribbed beams is 600-1200mm; or the height of the longitudinal steel multi-ribbed beams and / or the transverse steel multi-ribbed beams is 200-1500mm; or the width of the longitudinal steel multi-ribbed beams and / or the transverse steel multi-ribbed beams is 100-400mm; or the number of the longitudinal steel multi-ribbed beams and / or the transverse steel multi-ribbed beams 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 longitudinal steel multi-ribbed beam and / or the transverse steel multi-ribbed 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 in the longitudinal steel multi-ribbed beam and / or the transverse steel multi-ribbed beam is one or a combination of the shapes of "I", "O", "T", "L"; or the steel in the longitudinal steel multi-ribbed beam and / or the transverse 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 the steel bars are arranged in the bottom plate and are vertically connected to the longitudinal steel multi-ribbed beams and / or transverse steel multi-ribbed beams, the ends of the vertical steel bars are provided with longitudinal steel bars along the direction of the longitudinal steel multi-ribbed beams and / or transverse steel multi-ribbed beams, and the longitudinal steel bars are welded to the web or lower flange plate of the steel; or the steel bars in the bottom plate perpendicular to the longitudinal steel multi-ribbed beams and / or transverse steel multi-ribbed beams pass through the web or side plate of the steel and extend outward in one direction or two directions, so that the prefabricated bottom plate is unilaterally or bilaterally extended to the outside of the longitudinal steel multi-ribbed beams and / or transverse steel multi-ribbed beams, and the extended bottom plate has bottom bars extending out of the plate edge.

[0013] Based on the above technical solution, the integrated pipe fitting 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 and a combination thereof are provided on the upper surface of the integrated pipe fitting close to the bottom plate; or the integrated pipe fitting is located at the bottom of the longitudinal steel multi-rib beam and / or the transverse steel multi-rib beam.

[0014] On the basis of the above technical scheme, the cover plate is cast-in-place or prefabricated by 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 longitudinal steel multi-ribbed beams or transverse steel multi-ribbed beams; or the cover plate is arranged on the precast concrete part of the longitudinal steel multi-ribbed beams and / or transverse steel multi-ribbed beams with a shelf length of 10mm-20mm; or the bottom elevation of the cover plate is equal to the elevation of the upper flange of the inner steel of the longitudinal steel multi-ribbed beams and / or the transverse steel multi-ribbed beams 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 solution, two steel structures are spliced ​​with prefabricated dense-rib cavity floor modules by overlapping the extended steel bars of the bottom plate, and a steel beam is placed horizontally. The steel beam is rigidly connected to the steels in the two horizontal steel dense-rib beams, and then poured with concrete for curing and forming;

[0016] Or the prefabricated dense-rib cavity floor modules of two steel structures are spliced ​​by inserting the corresponding two bottom slabs' extended steel bars into a common longitudinal steel dense-rib beam and / or transverse steel dense-rib beam, and rigidly connecting the steel in the longitudinal steel dense-rib beam and / or transverse steel dense-rib beam at the connection, and then pouring concrete on site together with the concrete of the longitudinal steel dense-rib beam and / or transverse steel dense-rib beam to form the concrete;

[0017] Or two steel structure dense-rib cavity floor modules are spliced ​​together by rigidly connecting the outwardly extending steel bars of the bottom plate of one module with the steel sections in a longitudinal steel dense-rib beam and / or a transverse steel dense-rib beam of the other module, and then pouring concrete on site together with the concrete of the longitudinal steel dense-rib beam and / or the transverse steel dense-rib beam to form the modules.

[0018] Based on the above technical solution, a construction method of a bidirectional dense-rib cavity floor module for steel structure includes six steps: formwork, hoisting, module connection, pipeline laying, plate sealing, and maintenance and demoulding:

[0019] The formwork step is to set supporting poles at the joints of two bidirectional dense-rib cavity floor modules for a steel structure; or to set a top plate at the top of the supporting pole, and the top plate is firmly fixed to the steel in the longitudinal steel dense-rib beam and / or the transverse steel dense-rib beam by using notches, tongues, bolts, screws or pins;

[0020] The module connection step is that after two modules of a bidirectional dense-rib cavity floor for steel structure are spliced ​​in place, they are overlapped by the protruding steel bars of the bottom plate, and a steel beam is placed horizontally, and the steel beam is rigidly connected to the steel sections in the two transverse steel dense-rib beams respectively, and then concrete is poured and cured to form; or two prefabricated dense-rib cavity floor modules for steel structure are spliced ​​by inserting the corresponding two bottom plate protruding steel bars into a common longitudinal steel dense-rib beam and / or transverse steel dense-rib beam, and rigidly connecting the steel sections in the longitudinal steel dense-rib beam and / or transverse steel dense-rib beam at the connection, and then pouring concrete on site together with the concrete of the longitudinal steel dense-rib beam and / or transverse steel dense-rib beam to form; or two modules of dense-rib cavity floor for steel structure are spliced ​​by the protruding steel bars of the bottom plate of one module and the steel sections in a longitudinal steel dense-rib beam and / or transverse steel dense-rib beam of the other module, and then pouring concrete on site together with the concrete of the longitudinal steel dense-rib beam and / or transverse steel dense-rib beam to form;

[0021] The pipeline laying step is to lay the horizontal pipeline on the bottom plate and reach the end interface through the integrated pipeline parts;

[0022] The plate sealing step is to set a bottom formwork on the precast concrete in the longitudinal steel multi-rib beam and / or the transverse steel multi-rib beam after the connection step and pipeline laying are completed, and then lay the steel bars of the cast-in-place cover plate on the upper part of the bottom formwork, and pour the concrete of the overlapping parts of the longitudinal steel multi-rib beam and / or the transverse steel multi-rib beam and the cover plate;

[0023] Or the sealing step is to lay a cover plate on the precast concrete in the longitudinal steel multi-ribbed beam and / or the transverse steel multi-ribbed beam after the connection step and the laying of pipelines are completed, and pour concrete in the overlapping parts of the longitudinal steel multi-ribbed beam and / or the transverse steel multi-ribbed beam and between the cover plates.

[0024] Compared with the prior art, the advantages of the present invention are:

[0025] (1) Compared with the prior art, the bidirectional dense-rib cavity floor module for steel structure in the present invention has a high prefabrication rate and a high degree of industrialization; it has high rigidity, strong bearing capacity, good bidirectional force performance, and strong integrity. It can be more suitable for larger structural spans and is suitable for solving the problem of prefabricated floor for public buildings, even for public buildings with larger spans.

[0026] (2) A bidirectional dense-rib cavity floor module for steel structure and a construction method thereof in the present invention are completely formwork-free and have a high prefabrication rate, saving construction time and effectively reducing costs, and the construction can be quickly completed according to the construction plan.

[0027] (3) The bidirectional dense-rib cavity floor module for the 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

[0028] 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;

[0029] 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;

[0030] 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;

[0031] 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.

[0032] In the figure: 1-steel multi-ribbed beam, 1-1-longitudinal steel multi-ribbed beam, 1-2-transverse steel multi-ribbed beam, 2-bottom plate, 3-cover plate, 4-integrated pipe fittings, 5-holes, 7-reinforcement, 8-longitudinal steel bars, 9-supporting uprights, 10-top plate. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0034] See also Figure 1 The schematic structural diagram of a bidirectional dense-rib cavity floor module for a steel structure in an embodiment of the present invention is shown, which is composed of at least two parallel longitudinal steel dense-rib beams 1-1, at least two parallel transverse steel dense-rib beams 1-2, at least one reinforced concrete base plate 2, at least one reinforced concrete cover plate 3 and at least one integrated pipe member 4. The steel sections in the longitudinal steel dense-rib beams 1-1 and / or the transverse steel dense-rib beams 1-2 are connected to the steel bars of the base plate 2 and are integrally formed by pouring concrete. The height of the precast concrete in the longitudinal steel dense-rib beams 1-1 and / or the transverse steel dense-rib beams 1-2 is less than or equal to the difference between the design height of the steel dense-rib beams 1 and the thickness of the cover plate 3. The integrated pipe member 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 longitudinal steel dense-rib beams 1-1 and / or the transverse steel dense-rib beams 1-2.

[0035] Holes 5 are reserved on the webs or side plates of the steel in the longitudinal steel beams 1-1 and / or transverse steel beams 1-2; or conduits are reserved in the holes 5; or the width of the longitudinal steel beams 1-1 and / or transverse steel beams 1-2 is greater than or equal to the width of the upper flange or steel of the longitudinal steel beams 1-1 and / or transverse steel beams 1-2. This facilitates the passage of concrete, the passing of bottom plate steel bars through beams, or the passing of pipes through beams when necessary.

[0036] The center distance of the longitudinal steel beam 1-1 and / or the transverse steel beam 1-2 is 600-1200 mm; or the height of the longitudinal steel beam 1-1 and / or the transverse steel beam 1-2 is 200-1500 mm; or the width of the longitudinal steel beam 1-1 and / or the transverse steel beam 1-2 is 100-400 mm; or the number of the longitudinal steel beam 1-1 and / or the transverse steel beam 1-2 is 2, 3 or 4. A common span of this module is given.

[0037] The upper and lower flange plates of the steel in the longitudinal steel multi-ribbed beam 1-1 and / or the transverse steel multi-ribbed beam 1-2 are welded with stiffeners 7, which are one or a combination of steel bars, steel strips, and steel meshes. Strengthening the connection performance between the precast or post-cast concrete and the steel in the longitudinal steel multi-ribbed beam 1-1 and the transverse steel multi-ribbed beam 1-2 can also more effectively improve the shear strength of the steel multi-ribbed beam 1, thereby reducing the height of the steel multi-ribbed beam 1, which not only improves the use of the function in the house, but also saves the construction cost.

[0038] The cross-section of the steel in the longitudinal steel multi-ribbed beam 1-1 and / or the transverse steel multi-ribbed beam 1-2 is one or a combination of the shapes of "I", "O", "T", "L"; or the steel in the longitudinal steel multi-ribbed beam 1-1 and / or the transverse steel multi-ribbed beam 1-2 is a light steel composite structure.

[0039] 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 sections in the longitudinal steel multi-ribbed beam 1-1 and / or the transverse steel multi-ribbed beam 1-2, the ends of the vertical steel bars are provided with longitudinal steel bars 8 along the direction of the longitudinal steel multi-ribbed beam 1-1 and / or the transverse steel multi-ribbed beam 1-2, and the longitudinal steel bars 8 are welded to the web or lower flange plate of the medium-section steel of the steel multi-ribbed beam 1; or the steel bars in the bottom plate 2 perpendicular to the longitudinal steel multi-ribbed beam 1-1 and / or the transverse steel multi-ribbed beam 1-2 pass through the web or side plate of the medium-section steel of the steel multi-ribbed beam 1 and extend outward in one direction or two directions, so that the prefabricated bottom plate 2 is unilaterally or bilaterally extended to the outside of the longitudinal steel multi-ribbed beam 1-1 and / or the transverse steel multi-ribbed beam 1-2, and the bottom plate 2 extended outward has bottom bars extending out of the plate edge.

[0040] The integrated pipe component 4 is provided with one or more pipeline inlets and outlets; or the integrated pipe component 4 is connected to the hole 5 or the conduit; or the upper surface of the integrated pipe component 4 near the bottom plate 2 is provided with a reserved junction box, an electrical fixing base, a power socket, a temperature-sensing fire alarm monitoring device or a combination thereof; or the integrated pipe component 4 is located at the bottom of the longitudinal steel multi-rib beam 1-1 and / or the transverse steel multi-rib beam 1-2.

[0041] The cover plate 3 is prefabricated with 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 between two adjacent longitudinal steel multi-ribbed beams 1-1 or transverse steel multi-ribbed beams 1-2; or the cover plate 3 is placed on the precast concrete part of the longitudinal steel multi-ribbed beams 1-1 and / or transverse steel multi-ribbed beams 1-2 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 inner steel or the top surface of the steel of the longitudinal steel multi-ribbed beams 1-1 and / or transverse steel multi-ribbed beams 1-2; 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.

[0042] 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 prefabricated dense-rib cavity floor modules for steel structure are spliced ​​by overlapping the extended steel bars of the bottom plate 2, and a steel beam is placed horizontally. The steel beam is rigidly connected to the steels in the two horizontal steel dense-rib beams 1-2, and then poured with concrete for curing and forming.

[0043] 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 a steel structure in an embodiment of the present invention, or the splicing of two prefabricated dense-rib cavity floor modules for steel structures is achieved by inserting the corresponding two bottom plates 2 extending steel bars into a common longitudinal steel dense-rib beam 1-1 and / or transverse steel dense-rib beam 1-2, and rigidly connecting the steel bars in the longitudinal steel dense-rib beam 1-1 and / or transverse steel dense-rib beam 1-2 at the connection point, and then pouring concrete on site together with the concrete of the longitudinal steel dense-rib beam 1-1 and / or transverse steel dense-rib beam 1-2 to form a shape;

[0044] 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, or two dense-rib cavity floor modules for steel structure are spliced ​​by rigidly connecting the protruding steel bars of the bottom plate 2 of one module with the steel sections in the longitudinal steel dense-rib beam 1-1 and / or the transverse steel dense-rib beam 1-2 of the other module, and then pouring concrete on site together with the concrete of the longitudinal steel dense-rib beam 1-1 and / or the transverse steel dense-rib beam 1-2 to form the concrete.

[0045] A construction method for a bidirectional dense-rib cavity floor module for a steel structure includes six steps of formwork, hoisting, module connection, pipeline laying, plate sealing, and maintenance and demoulding, and is characterized in that:

[0046] The formwork step is to set support posts 9 at the joints of two bidirectional dense-rib cavity floor modules for a steel structure; or set a top plate 10 at the top of the support posts 9, and the top plate 10 is firmly fixed to the steel in the longitudinal steel dense-rib beam 1-1 and / or the transverse steel dense-rib beam 1-2 by using grooves, tongues, bolts, screws or pins;

[0047] The module connection step is that after two modules of a steel structure bidirectional dense rib cavity floor are spliced ​​in place, they are overlapped by the extended steel bars of the bottom plate 2, and a steel beam is placed horizontally. The steel beam is rigidly connected to the steel sections in the two horizontal steel dense rib beams 1-2, and then concrete is poured and cured to form; or two steel structures are spliced ​​by inserting the corresponding two bottom plates 2 extended steel bars into a common longitudinal steel dense rib beam 1-1 and / or transverse steel dense rib beam 1-2, and the longitudinal steel dense rib beam 1-1 and / or transverse steel dense rib beam 1-2 at the connection are connected. The steel sections in the multi-ribbed beams 1-2 are rigidly connected as one, and then the concrete is cast on site together with the concrete of the longitudinal multi-ribbed beams 1-1 and / or the transverse multi-ribbed beams 1-2 to form the concrete; or two steel structures are spliced ​​with multi-ribbed cavity floor modules by the extended steel bars of the bottom plate 2 of one module being rigidly connected as one with the steel sections in the longitudinal multi-ribbed beams 1-1 and / or the transverse multi-ribbed beams 1-2 of the other module, and then the concrete is cast on site together with the concrete of the longitudinal multi-ribbed beams 1-1 and / or the transverse multi-ribbed beams 1-2 to form the concrete;

[0048] 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;

[0049] The plate sealing step is to set a bottom formwork on the precast concrete in the longitudinal steel multi-rib beam 1-1 and / or the transverse steel multi-rib beam 1-2 after the connection step and the pipeline laying are completed, and then lay the steel bars of the cast-in-place cover plate 3 on the upper part of the bottom formwork, and pour the concrete of the overlapping parts of the longitudinal steel multi-rib beam 1-1 and / or the transverse steel multi-rib beam 1-2 and the cover plate 3;

[0050] Or the sealing step is to lay the cover plate 3 on the precast concrete in the longitudinal steel multi-ribbed beam 1-1 and / or the transverse steel multi-ribbed beam 1-2 after the connection step and the laying of the pipeline are completed, and to pour concrete between the overlapping parts of the longitudinal steel multi-ribbed beam 1-1 and / or the transverse steel multi-ribbed beam 1-2 and the cover plate 3.

[0051] The bidirectional dense-rib cavity floor module for steel structure of the present invention has high rigidity, strong bearing capacity, no need for formwork, high prefabrication rate and high industrialization degree. It is not only suitable for solving the problem of assembled floor slabs of buildings with large volume but small span, such as residential buildings, but also suitable for solving the problem of assembled floor slabs of public buildings and even public buildings with large spans. It reduces the deadweight of the floor slab, shortens the construction period, increases the indoor net height, and can also reduce the construction cost.

[0052] In addition, the prefabricated bidirectional dense-rib cavity floor module for steel structure of the present invention has good bidirectional force-bearing performance and strong integrity, and can be more suitable for larger structural spans than unidirectional prefabricated dense-rib cavity floor modules.

[0053] Compared with the prior art, the bidirectional dense-rib cavity floor module for steel structure in the present invention has high rigidity, strong bearing capacity, good bidirectional force performance and strong integrity, and can be more suitable for larger structural spans, and is suitable for solving the problem of prefabricated floor of public buildings and even public buildings with larger spans.

[0054] 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 bidirectional multi-rib cavity floor module for a steel structure, comprising at least two parallel longitudinal multi-rib steel beams (1-1), at least two parallel transverse multi-rib steel beams (1-2), at least one reinforced concrete bottom plate (2), at least one cover plate (3) and at least one integrated pipe member (4), characterized in that: The steel section of the steel multi-rib beam (1) is in the shape of an I. The steel sections in the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2) are connected to the steel bars of the bottom plate (2) and are integrally formed by pouring concrete; the height of the precast concrete in the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2) 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 portions of the two parallel longitudinal steel multi-ribbed beams (1-1) and / or the transverse steel multi-ribbed beams (1-2); 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 longitudinal steel multi-rib beam (1-1) and / or the transverse steel multi-rib beam (1-2), and the longitudinal steel bars (8) are welded to the web plate or the lower flange plate of the middle steel of the steel multi-rib beam (1); The cover plate (3) is laid on the precast concrete in the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2), and concrete is poured between the overlapping parts of the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2) and the cover plate (3).

2. A bidirectional dense-rib cavity floor module for steel structure according to claim 1, characterized in that: Holes (5) are reserved on the webs or side plates of the steel sections in the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2); or guide tubes are reserved in the holes (5); or the width of the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2) is greater than or equal to the width of the upper flange of the steel sections of the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2) or the width of the steel sections.

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

4. A bidirectional dense-rib cavity floor module for steel structure according to claim 1, characterized in that: The upper and lower flange plates of the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2) 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 bidirectional 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 a reserved junction box, an electrical appliance 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 (4) close to the bottom plate (2); or the integrated pipe component (4) is located at the bottom of the longitudinal steel multi-rib beam (1-1) and / or the transverse steel multi-rib beam (1-2).

6. A bidirectional dense-rib cavity floor module for steel structure according to claim 1, characterized in that: The cover plate (3) is cast-in-place or prefabricated with reinforced concrete; 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 longitudinal steel multi-rib beams (1-1) or transverse steel multi-rib beams (1-2); or the cover plate (3) is arranged on the prefabricated concrete portion of the longitudinal steel multi-rib beams (1-1) and / or transverse steel multi-rib beams (1-2) with a shelf 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 inner steel of the longitudinal steel multi-rib beams (1-1) and / or the transverse steel multi-rib beams (1-2) or the top surface of the steel; or an inspection hole or a peep hole is reserved on the cover plate (3), and the inspection hole or the peep hole is provided with a movable cover plate.

7. A bidirectional dense-rib cavity floor module for steel structure according to claim 1, characterized in that: The two steel structures are spliced ​​with prefabricated dense-rib cavity floor modules by overlapping the extended steel bars of the bottom plate (2), and a steel beam is placed transversely. The steel beam is rigidly connected to the two transverse steel dense-rib beams (1-2), and then concrete is poured and cured to form the modules; Or the two steel structures are spliced ​​with prefabricated dense-rib cavity floor modules by inserting the extended steel bars of the corresponding two bottom plates (2) into a common longitudinal steel dense-rib beam (1-1) and / or transverse steel dense-rib beam (1-2), and rigidly connecting the steel bars in the longitudinal steel dense-rib beam (1-1) and / or transverse steel dense-rib beam (1-2) at the connection point, and then pouring concrete on site together with the concrete of the longitudinal steel dense-rib beam (1-1) and / or transverse steel dense-rib beam (1-2) to form the concrete; Or two steel structure dense-rib cavity floor modules are spliced ​​by rigidly connecting the extended steel bars of the bottom plate (2) of one module with the steel in a longitudinal steel dense-rib beam (1-1) and / or a transverse steel dense-rib beam (1-2) of the other module, and then pouring concrete on site together with the concrete of the longitudinal steel dense-rib beam (1-1) and / or the transverse steel dense-rib beam (1-2) to form the concrete.

8. A construction method for a bidirectional dense-ribbed cavity floor module for a steel structure, using the bidirectional dense-ribbed cavity floor module for a 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 step comprises arranging support posts (9) at the joints of two bidirectional dense-rib cavity floor modules for a steel structure; or arranging a top plate (10) at the top of the support posts (9); the top plate (10) and the steel sections in the longitudinal steel dense-rib beam (1-1) and / or the transverse steel dense-rib beam (1-2) are securely fixed by using notches, tongues and grooves, bolts, screws or latches; The module connection step is to splice two modules of a steel structure bidirectional dense rib cavity floor in place by overlapping them through the steel bars extending outward from the bottom plate (2), and to place a steel beam transversely, so that the steel beam is rigidly connected to two transverse steel dense rib beams (1-2) respectively, and then pour concrete to cure and form; or two prefabricated steel structure dense rib cavity floor modules are spliced ​​by inserting the corresponding two bottom plates (2) extending outwardly into a common longitudinal steel dense rib beam (1-1) and / or transverse steel dense rib beam (1-2), and connecting them with the longitudinal steel dense rib beam (1-1) and / or transverse steel dense rib beam ( 1-2) are rigidly connected as one, and then the concrete is cast on site together with the concrete of the longitudinal steel multi-rib beam (1-1) and / or the transverse steel multi-rib beam (1-2) to form the concrete; or two steel structure multi-rib cavity floor modules are spliced ​​by the extended steel bars of the bottom plate (2) of one module being rigidly connected as one with the steel in a longitudinal steel multi-rib beam (1-1) and / or the transverse steel multi-rib beam (1-2) of the other module, and then the concrete is cast on site together with the concrete of the longitudinal steel multi-rib beam (1-1) and / or the transverse steel multi-rib beam (1-2); 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 longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2) after the connection step and the laying of the pipeline are completed, and then lay the steel bars of the cast-in-place cover plate (3) on the upper part of the bottom formwork, and pour concrete at the overlapping parts of the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2) and the cover plate (3); Or the sealing step is to lay a cover plate (3) on the precast concrete in the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2) after the connection step and the laying of the pipeline are completed, and to pour concrete between the overlapping parts of the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2) and the cover plate (3).