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

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 module is prefabricated and formed into one piece by at least two parallel longitudinal steel dense-rib beams, at least two parallel transverse steel dense-rib beams, at least one bottom plate, at least one cavity component and at least one integrated pipeline component. The longitudinal steel dense-rib beams and the transverse steel dense-rib beams are cross-arranged, and the bottom plate is located at the bottom of the space enclosed by the longitudinal steel dense-rib beams and the transverse steel dense-rib beams. The steel sections in the longitudinal steel dense-rib beams and the steel sections in the transverse steel dense-rib beams are respectively connected to the steel bars of the bottom plate and are integrally formed by pouring concrete. The integrated pipeline component is fixed on the top of the bottom plate, and the cavity component is fixed on the top of the bottom plate. 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.

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 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 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 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 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 is prefabricated into one piece by at least two parallel longitudinal steel dense-rib beams, at least two parallel transverse steel dense-rib beams, at least one bottom plate, at least one cavity component and at least one integrated pipeline component. The longitudinal steel dense-rib beams and the transverse steel dense-rib beams are cross-arranged, the bottom plate is located at the bottom of the space enclosed by the longitudinal steel dense-rib beams and the transverse steel dense-rib beams, the steel sections in the longitudinal steel dense-rib beams and the steel sections in the transverse steel dense-rib beams are respectively connected to the steel bars of the bottom plate and are integrated by pouring concrete, and the cavity component and the integrated pipeline component are fixed to 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 longitudinal steel multi-ribbed beam and / or the transverse steel multi-ribbed beam; or a conduit is reserved in the hole; or the concrete within the height h range inside the longitudinal steel multi-ribbed beam and the transverse steel multi-ribbed beam is prefabricated together with the concrete of the bottom plate, and the height h of the prefabricated concrete inside the longitudinal steel multi-ribbed beam and / or the transverse 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 longitudinal steel multi-ribbed beam and / or the transverse steel multi-ribbed beam is the net distance between two adjacent cavity components; or the width b 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 or steel of the longitudinal steel multi-ribbed beam and / or the transverse steel multi-ribbed beam.

[0009] On the basis of the above technical scheme, the center distance between 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 steel multi-ribbed beams is 2, 3 or 4.

[0010] Based on 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. The stiffeners are one of steel bars, steel strips, steel mesh and a combination of several of them.

[0011] On the basis of the above technical scheme, the cross-section of the steel in the longitudinal steel multi-ribbed beam and / or the transverse steel multi-ribbed beam is one of the shapes of "I", "O", "T", "L" and their combinations; 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 webs or lower flange plates of the longitudinal steel multi-ribbed beams and / or transverse steel multi-ribbed beams; 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 webs or side plates of the steel multi-ribbed beams and extend outward in one direction or two directions, so that the prefabricated bottom plate is single-sided or double-sidedly extended to the outside of the steel multi-ribbed beams, and the extended bottom plate has bottom bars extending out of the plate edge.

[0013] On the basis of the above technical scheme, 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 on the bottom plate inside the cavity component; 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] 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 firmly 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 two adjacent longitudinal steel multi-ribbed beams and / or two adjacent transverse steel multi-ribbed beams of medium-shaped steel upper flange plates; 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 longitudinal steel multi-ribbed beams and / or the transverse steel multi-ribbed beams of medium-shaped steel.

[0016] On the basis of the above technical solution, two steel structures are spliced ​​with 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 rigidly connects the two horizontal steel dense-rib beams respectively, and the cavity components are installed before and after the steel beam, and then the concrete is poured and cured to form;

[0017] Or the splicing of two steel structure multi-rib cavity floor modules is done by inserting the extended steel bars of the corresponding two bottom plates into a common longitudinal steel multi-rib beam and / or transverse steel multi-rib beam, and rigidly connecting the longitudinal steel multi-rib beam and / or transverse steel multi-rib beam at the connection point, and then pouring concrete on site together with the concrete of the longitudinal steel multi-rib beam and / or transverse steel multi-rib beam to form the modules;

[0018] Or two steel structure dense-rib cavity floor modules are spliced ​​by using the extended steel bars of the bottom plate of one module and the longitudinal steel dense-rib beam and / or transverse steel dense-rib beam of the other module, and the longitudinal steel dense-rib beam and / or transverse steel dense-rib beam at the connection are rigidly connected together, and then concrete is poured on site together with the concrete of the longitudinal steel dense-rib beam and / or transverse steel dense-rib beam to form the concrete.

[0019] 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:

[0020] 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;

[0021] The module connection step is to connect the steel bars in the bottom plate of one module with the steel bars in the bottom plate of another module after the modules of the bidirectional dense-rib cavity floor for steel structure are spliced ​​in place in pairs, and place a steel beam in the horizontal direction, the steel beam is rigidly connected to the two adjacent transverse steel beams, and the cavity components are installed in front and behind the steel beams, and then poured concrete for curing to form; or insert a common longitudinal steel beam and / or transverse steel beam through the extended steel bars of the corresponding two bottom plates, and rigidly connect the longitudinal steel beam and / or transverse steel beam at the connection, and cast concrete on site together with the concrete of the longitudinal steel beam and / or transverse steel beam; or weld the steel bars in the bottom plate of one module to the web or lower flange plate of the longitudinal steel beam and / or transverse steel beam of the other module after the modules of the bidirectional dense-rib cavity floor for steel structure are spliced ​​in place in pairs;

[0022] The pipeline laying step is to lay the horizontal pipeline on the bottom plate and reach the end interface through the integrated pipeline parts;

[0023] The panel sealing step is to lay the steel bars of the panel on the upper part of the longitudinal steel multi-ribbed beam and / or the transverse steel multi-ribbed beam and the cavity member after the connection step and the pipeline laying step are completed, and to pour the concrete of the overlapping parts of the longitudinal steel multi-ribbed beam and / or the transverse steel multi-ribbed beam and the panel;

[0024] Or the sealing step is after the module connection step and the pipeline laying step are completed, prefabricated panels are laid on the upper part of the longitudinal steel multi-ribbed beams and / or transverse steel multi-ribbed beams and the cavity components, and concrete is poured between the overlapping parts of the longitudinal steel multi-ribbed beams and / or transverse steel multi-ribbed beams and the prefabricated panels.

[0025] Compared with the prior art, the advantages of the present invention are:

[0026] (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 with larger spans.

[0027] (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.

[0028] (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

[0029] 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;

[0030] 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;

[0031] 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;

[0032] 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.

[0033] In the figure: 1-steel multi-ribbed beam, 1-1-longitudinal steel multi-ribbed beam, steel multi-ribbed beam, 1-2-transverse steel multi-ribbed beam, 2-bottom plate, 3-cavity member, 4-integrated pipe fittings, 5-holes, 7-stiffeners, 8-longitudinal steel bars, 9-supporting uprights, 10-top plate, 13-panel. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0035] See also Figure 1The schematic diagram of the overall structure of a bidirectional dense-rib cavity floor module for steel structure in an embodiment of the present invention is shown, a bidirectional dense-rib cavity floor module for steel structure, which is prefabricated into one piece by 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 base plate 2, at least one cavity component 3 and at least one integrated pipe component 4, the longitudinal steel dense-rib beams 1-1 and the transverse steel dense-rib beams 1-2 are cross-arranged, the base plate 2 is located at the bottom of the space enclosed by the longitudinal steel dense-rib beams 1-1 and the transverse steel dense-rib beams 1-2, the steel sections in the longitudinal steel dense-rib beams 1-1 and the steel sections in the transverse steel dense-rib beams 1-2 are respectively 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 top of the base plate 2, and the cavity component 3 is fixed on the top of the base plate 2.

[0036] 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 concrete within the height h of the longitudinal steel beams 1-1 and transverse steel beams 1-2 is prefabricated together with the concrete of the bottom plate 2, and the height h of the prefabricated concrete in the longitudinal steel beams 1-1 and / or transverse steel beams 1-2 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 longitudinal steel beams 1-1 and / or transverse steel beams 1-2 is the net distance between two adjacent cavity members 3; or the width b 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 of the steel or the steel of the longitudinal steel beams 1-1 and / or transverse steel beams 1-2. It is convenient for concrete to pass through, bottom plate steel bars to pass through beams, or pipes to pass through beams when necessary.

[0037] The center distance between the longitudinal steel multi-ribbed beams 1-1 and / or the transverse steel multi-ribbed beams 1-2 is 600-1200 mm; or the height of the longitudinal steel multi-ribbed beams 1-1 and / or the transverse steel multi-ribbed beams 1-2 is 200-1500 mm; or the width of the longitudinal steel multi-ribbed beams 1-1 and / or the transverse steel multi-ribbed beams 1-2 is 100-400 mm; or the number of steel multi-ribbed beams 1 is 2, 3 or 4. A common span of this module is given.

[0038] 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, which are one of steel bars, steel strips, and steel meshes, or a combination thereof. 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.

[0039] 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 of the shapes of "I", "O", "T", "L" and their combinations; 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.

[0040] 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 connected vertically with the longitudinal steel multi-ribbed beam 1-1 and / or the transverse steel multi-ribbed beam 1-2, the end of the vertical steel bar is provided with a longitudinal steel bar 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 bar 8 is welded to the web or lower flange plate of the longitudinal steel multi-ribbed beam 1-1 and / or the transverse steel multi-ribbed beam 1-2; this is to 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. 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 extend outward in one direction or two directions through the web or side plate of the steel multi-ribbed beam 1, so that the prefabricated bottom plate 2 is extended outward in one direction or two directions to the outside of the steel multi-ribbed beam 1, and the bottom plate 2 extended outward has bottom bars extending out of the plate edge.

[0041] 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 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 component 4 near the bottom plate 2; 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 at the bottom of the longitudinal steel multi-rib beam 1-1 and / or the transverse steel multi-rib beam 1-2.

[0042] The cavity component 3 is a pentahedral structure surrounded by hard material, with its opening facing the bottom plate 2 and firmly connected to the bottom plate 2; or the cavity component 3 is a hexahedral structure surrounded by hard material and firmly connected to the bottom plate 2; or the cavity component 3 is a lightweight six-sided solid body.

[0043] The width of the cavity component 3 is less than or equal to the net distance between two adjacent longitudinal steel multi-ribbed beams 1-1 and / or two adjacent transverse steel multi-ribbed beams 1-2 medium-shaped steel upper flange plates; 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 longitudinal steel multi-ribbed beams 1-1 and / or the transverse steel multi-ribbed beams 1-2 medium-shaped steel.

[0044] See also Figure 2 The schematic diagram of the construction and assembly structure of a bidirectional dense-rib cavity floor module for steel structure in an embodiment of the present invention is shown, where two dense-rib cavity floor modules for steel structure are spliced ​​by overlapping the extended steel bars of the bottom plate 2 and then curing with post-poured concrete;

[0045] See also Figure 3The schematic diagram of the construction and assembly structure of a bidirectional dense-rib cavity floor module for steel structure in an embodiment of the present invention is shown, or two dense-rib cavity floor modules for steel structure are spliced ​​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 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;

[0046] See also Figure 4 The schematic diagram of the construction and assembly structure of a bidirectional dense-rib cavity floor module for steel structure in an embodiment of the present invention is shown, or two dense-rib cavity floor modules for steel structure are spliced ​​by pouring concrete on site together with the protruding steel bars of the bottom plate 2 of one of the modules and the longitudinal steel dense-rib beams 1-1 and / or transverse steel dense-rib beams 1-2 of the other module together with the concrete of the longitudinal steel dense-rib beams 1-1 and / or transverse steel dense-rib beams 1-2 to form the concrete.

[0047] A construction method for a bidirectional dense-rib cavity floor module for a steel structure includes six steps: formwork, hoisting, module connection, pipeline laying, plate sealing, and maintenance and demoulding:

[0048] 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;

[0049] The module connection step is to connect the steel bars in the bottom plate 2 of one module with the steel bars in the bottom plate 2 of another module after the modules of the bidirectional dense-rib cavity floor for steel structure are spliced ​​in place in pairs, and place a steel beam in the horizontal direction, the steel beam is rigidly connected to the two adjacent transverse steel beams 1-2, and the cavity components are installed in front and behind the steel beams, and then poured with concrete for curing and forming; or insert a common longitudinal steel beam 1-1 and / or transverse steel beam 1-2 through the extended steel bars of the corresponding two bottom plates 2, and rigidly connect the longitudinal steel beam 1-1 and / or transverse steel beam 1-2 at the connection, and cast concrete on site together with the concrete of the longitudinal steel beam 1-1 and / or transverse steel beam 1-2; or weld the steel bars in the bottom plate 2 of one module with the web or lower flange plate of the longitudinal steel beam 1-1 and / or transverse steel beam 1-2 of the other module after the modules of the bidirectional dense-rib cavity floor for steel structure are spliced ​​in place in pairs;

[0050] 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;

[0051] The plate sealing step is to lay the steel bars of the prefabricated panel 13 on the upper part of the longitudinal steel multi-ribbed beam 1-1 and / or the transverse steel multi-ribbed beam 1-2 and the cavity member 3 after the connection step and the pipeline laying are completed, and to pour the concrete of the overlapping parts of the longitudinal steel multi-ribbed beam 1-1 and / or the transverse steel multi-ribbed beam 1-2 and the prefabricated panel 13;

[0052] Or the sealing step is to lay panels 13 on the upper part of the longitudinal steel multi-ribbed beam 1-1 and / or the transverse steel multi-ribbed beam 1-2 and the cavity member 3 respectively after the connection step and the laying of pipelines are completed, 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 panels 13.

[0053] A bidirectional dense-rib cavity floor module for steel structure of the present invention has high rigidity, strong bearing capacity, is completely formwork-free, has a high prefabrication rate, and a high degree of industrialization. It is not only suitable for solving the problem of prefabricated floor slabs in building types such as residential buildings that are large in volume but small in span, but also suitable for solving the problem of prefabricated floor slabs in public buildings with larger spans. On the other hand, it reduces the deadweight of the floor slab, shortens the construction period, increases the indoor net height, and can also reduce the project cost. In addition, the prefabricated bidirectional dense-rib cavity floor module for steel structure of the present invention has good bidirectional force performance and strong integrity, and can be more suitable for larger structural spans than unidirectional prefabricated dense-rib cavity floor modules.

[0054] 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, can be more suitable for larger structural spans, and is suitable for solving the problem of prefabricated floor of public buildings with larger spans.

[0055] 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 steel structure, which is prefabricated and integrally formed by 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 bottom plate (2), at least one cavity member (3) and at least one integrated pipe member (4), characterized in that: The longitudinal steel multi-ribbed beam (1-1) and the transverse steel multi-ribbed beam (1-2) are arranged crosswise, the bottom plate (2) is located at the bottom of the space enclosed by the longitudinal steel multi-ribbed beam (1-1) and the transverse steel multi-ribbed beam (1-2), the steel in the longitudinal steel multi-ribbed beam (1-1) and the steel in the transverse steel multi-ribbed beam (1-2) are respectively connected to the steel bars of the bottom plate (2) and are integrally formed by pouring concrete, and the cavity component (3) and the integrated pipeline component (4) are both 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 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 webs or lower flange plates of the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2); The cavity component (3) is a pentahedral structure surrounded by a hard material, with its opening facing the bottom plate (2) and connected to the bottom plate (2); Laying steel bars of a panel (13) on the upper part of the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2) and the cavity member (3), and pouring 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 panel (13); The concrete within the height h of the longitudinal steel multi-ribbed beam (1-1) and the transverse steel multi-ribbed beam (1-2) is prefabricated together with the concrete of the bottom plate (2); the height h of the prefabricated concrete inside 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 sum of the thickness of the cavity component (3) and the thickness of the bottom plate (2); the width b of the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2) is the net distance between two adjacent cavity components (3); the width b 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 or the steel of the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2); 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 longitudinal steel multi-ribbed beams (1-1) and / or two adjacent transverse steel multi-ribbed beams (1-2); the height of the sum of the thicknesses of the cavity component (3) and the bottom plate (2) is less than or equal to the total height of the middle steel of the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2); 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 on the sides thereof, so as to strengthen 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); Panels (13) are laid on the upper parts of the longitudinal steel multi-ribbed beams (1-1) and / or the transverse steel multi-ribbed beams (1-2) and the cavity components (3), and concrete is poured between the overlapping parts of the longitudinal steel multi-ribbed beams (1-1) and / or the transverse steel multi-ribbed beams (1-2) and the panels (13).

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 conduits are reserved in the holes (5).

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

4. A bidirectional dense-rib cavity floor module for steel structure according to claim 1, characterized in that: The sides of the upper and lower flange plates of the longitudinal steel multi-rib beam (1-1) and / or the transverse steel multi-rib beam (1-2) are welded with stiffeners (7), which are one of steel bars, steel plate strips, steel mesh and a combination of several thereof.

5. The bidirectional dense-rib cavity floor module for steel structure according to claim 1, characterized in that: The steel sections in the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2) are in the shape of "I", "O", "T", "L" or a combination thereof; or the steel sections in the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2) are light steel composite structures.

6. A 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 on the bottom plate (2) inside the cavity component (3); 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).

7. A bidirectional dense-rib cavity floor module for steel structure according to claim 1, characterized in that: Two steel structure dense rib cavity floor modules are spliced ​​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 two transverse steel dense rib beams (1-2), and cavity components are installed before and after the steel beam, and concrete is poured and cured to form the cavity components. Or two steel structure multi-rib cavity floor modules are spliced ​​by inserting the extended steel bars of the corresponding two bottom plates (2) into a common longitudinal multi-rib steel beam (1-1) and / or transverse multi-rib steel beam (1-2), and rigidly integrating with the longitudinal multi-rib steel beam (1-1) and / or transverse multi-rib steel beam (1-2) at the connection, and then pouring concrete on site together with the concrete of the longitudinal multi-rib steel beam (1-1) and / or transverse multi-rib steel beam (1-2) to form the modules; Or two steel structure multi-rib cavity floor modules are spliced ​​by connecting the extended steel bars of the bottom plate (2) of one module with the longitudinal multi-rib steel beam (1-1) and / or the transverse multi-rib steel beam (1-2) of the other module, and making the longitudinal multi-rib steel beam (1-1) and / or the transverse multi-rib steel beam (1-2) at the connection rigidly integrated, and then pouring concrete on site together with the concrete of the longitudinal multi-rib steel beam (1-1) and / or the transverse multi-rib steel 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 connect the steel bars in the bottom plate (2) of one module with the steel bars in the bottom plate (2) of another module after the modules of the bidirectional dense rib cavity floor for a steel structure are spliced ​​in place in pairs, and a steel beam is placed transversely, the steel beam is rigidly connected to two adjacent transverse steel dense rib beams (1-2) respectively, and the cavity components are installed before and after the steel beams, and then concrete is poured and cured to form; or a common longitudinal steel dense rib beam (1-1) and / or transverse steel dense rib beam is inserted through the extended steel bars of the corresponding two bottom plates (2) The beam (1-2) is rigidly connected to the longitudinal steel multi-rib beam (1-1) and / or the transverse steel multi-rib beam (1-2) at the connection, and then the concrete is poured 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 after the two-way multi-rib cavity floor modules of the steel structure are spliced ​​in place, the steel bars in the bottom plate (2) of one module are welded to the web plate or lower flange plate of the longitudinal steel multi-rib beam (1-1) and / or the transverse steel multi-rib beam (1-2) of the other module; 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 panel sealing step is to lay steel bars of the panel (13) on the upper part of the longitudinal steel multi-ribbed beam (1-1) and / or the transverse steel multi-ribbed beam (1-2) and the cavity member (3) after the connection step and the pipeline laying step are completed, and to 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 panel (13); Or the sealing step is to respectively lay prefabricated panels (13) on the upper parts of the longitudinal steel multi-ribbed beams (1-1) and / or the transverse steel multi-ribbed beams (1-2) and the cavity components (3) after the module connection step and the pipeline laying step are completed, and to pour concrete between the overlapping parts of the longitudinal steel multi-ribbed beams (1-1) and / or the transverse steel multi-ribbed beams (1-2) and the prefabricated panels (13).

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