CN108867963B - Cold-formed thin-wall steel well-word floor slab structure and construction method - Google Patents
Cold-formed thin-wall steel well-word floor slab structure and construction method Download PDFInfo
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- CN108867963B CN108867963B CN201811005558.3A CN201811005558A CN108867963B CN 108867963 B CN108867963 B CN 108867963B CN 201811005558 A CN201811005558 A CN 201811005558A CN 108867963 B CN108867963 B CN 108867963B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/17—Floor structures partly formed in situ
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Abstract
A cold-formed thin-wall steel well-word floor structure and a construction method, wherein the floor structure comprises a group of floor modules and a light concrete layer which are spliced and connected in sequence; the floor slab module comprises a light steel frame, a heat preservation plate and a profiled steel sheet; the light steel frame is a rectangular frame structure formed by connecting a group of longitudinal steel rod pieces and at least two groups of transverse steel rod pieces; the heat preservation plates are provided with a group of heat preservation plates which are correspondingly filled in the grids of the light steel frame; the profiled steel sheet is paved on the top of the light steel frame; a baffle is arranged on one side of the top of each floor slab module along the longitudinal edge of the light steel frame in a through length manner; a first connecting plate is arranged at the bottom of each floor slab module; the bottoms of two adjacent floor slab modules are connected through a first connecting plate; and a light concrete layer is poured on the top of the profiled steel sheet and between adjacent baffles. The invention solves the technical problems of poor sound insulation, fire resistance, water resistance and bearing performance, low stability of each room and high maintenance frequency of the traditional floor after construction.
Description
Technical Field
The invention relates to the field of constructional engineering, in particular to a cold-formed thin-wall steel well-word floor slab structure and a construction method.
Background
The floor slab is an important structural member of the novel light steel joist structure residential system, and has not only static load and dynamic load acted on the floor slab, but also enough strength, rigidity and stability; the building has good heat preservation, sound insulation and fire resistance, and becomes a construction platform of the upper layer structure after the floor of the lower layer is installed. Floor slabs in the existing light steel houses can be divided into two types according to different construction modes: cast-in-place light steel floors (i.e., wet-process) and fabricated light steel floors (i.e., dry-process). The assembly type light steel floor slab commonly used at present has poor sound insulation effect, and relative sliding is easy to occur between the slabs or between the slabs and the light steel frame.
Disclosure of Invention
The invention aims to provide a cold-formed thin-wall steel well-word floor slab structure and a construction method thereof, which aim to solve the technical problems of poor sound insulation, fire resistance, water resistance and bearing performance, low stability of each room and high maintenance frequency after construction of the traditional floor slab.
In order to achieve the above purpose, the present invention adopts the following technical scheme.
A cold-formed thin-walled steel well-word floor structure comprises a group of floor modules which are connected in sequence in a spliced mode and a light concrete layer which is poured on the group of floor modules; the floor slab module comprises a light steel frame, a heat preservation plate and a profiled steel sheet; the light steel frame is a rectangular frame structure formed by connecting a group of longitudinal steel rod pieces and at least two groups of transverse steel rod pieces; the heat preservation plates are provided with a group of heat preservation plates which are correspondingly filled in the grids of the light steel frame; the profiled steel sheet is paved on the top of the light steel frame and covers a group of heat preservation boards; baffles are arranged on one side of the top of each floor slab module along the longitudinal edge of the light steel frame in a through length mode, and the baffles on adjacent floor slab modules after splicing form a side template for pouring the light concrete layer; a first connecting plate is arranged at the bottom of each floor slab module; wherein each first connecting plate is arranged along the bottom edge of the light steel frame in a full length manner; the bottoms of two adjacent floor slab modules are connected through a first connecting plate; the lightweight concrete layer is poured on the top of the profiled steel sheet and between the adjacent baffles.
Preferably, the section of the longitudinal section steel rod piece is I-shaped, and a group of longitudinal section steel rod pieces are arranged at intervals in parallel along the transverse direction; the section of each transverse section steel rod piece is I-shaped, and each group of transverse section steel rod pieces are arranged between adjacent longitudinal section steel rod pieces at intervals in parallel along the longitudinal direction; the end part of the transverse section steel rod piece is inserted between the upper flange and the lower flange of the longitudinal section steel rod piece, and the joint position of the web plate of the longitudinal section steel rod piece and the web plate of the transverse section steel rod piece is connected by adopting a second connecting plate.
Preferably, the section of the baffle is in an inverted T shape and comprises a transverse edge and a vertical edge connected to the middle of the top of the transverse edge; the transverse edges of the baffles are lapped on the top surface of the light steel frame, and the vertical edges of the baffles are flush with the longitudinal side surface of the corresponding side of the light steel frame.
Preferably, the cross section of the first connecting plate is L-shaped and comprises a transverse edge and a vertical edge connected to one side of the transverse edge; the horizontal edge of the first connecting plate is connected to the bottom surface of the light steel frame, and the vertical edge of the first connecting plate is flush with the side surface of the corresponding side of the light steel frame.
Preferably, holes are formed in the vertical edges of the first connecting plates at intervals along the long axis direction of the vertical edges, and adjacent first connecting plates are connected through connecting pieces penetrating through the holes.
A construction method of a cold-formed thin-walled steel well-word floor slab structure comprises the following steps.
Step one, preparing a material.
And secondly, manufacturing a light steel frame, and filling a heat insulation plate in a sash of the light steel frame.
Third, arranging first connecting plates at the bottom of the light steel frame and along the edges of the periphery respectively; the first connecting plates on each side are arranged along the side edge of the light steel frame in a through length mode; meanwhile, a baffle is arranged on one side of the top of the light steel frame, and the baffle is arranged along the longitudinal side edge in a full length mode.
And fourthly, paving the profiled steel sheet on the top of the light steel frame to manufacture the floor slab module.
And fifthly, splicing a group of floor slab modules in sequence according to the design positions, wherein the longitudinal profile steel rod pieces of the adjacent floor slab modules are spliced and connected.
Pouring a light concrete layer between the top and adjacent baffles of a group of floor slab modules; and finishing the construction.
Preferably, in the second step, the section of the longitudinal section steel rod piece of the light steel frame is in an i shape, the section of the transverse section steel rod piece is in an i shape, the flange of the transverse section steel rod piece is inserted between the upper flange and the lower flange of the longitudinal section steel rod piece, and the joint position of the web plate of the longitudinal section steel rod piece and the web plate of the transverse section steel rod piece is connected by adopting a second connecting plate; the cross section of the second connecting plate is L-shaped and comprises a transverse edge and a longitudinal edge connected to one side of the transverse edge; the transverse edge of the second connecting plate is connected to the web plate of the transverse section steel rod piece, and the longitudinal edge of the second connecting plate is connected to the web plate of the longitudinal section steel rod piece.
Preferably, in the second step, an adhesive is coated on the contact surface of the heat insulation plate and the light steel frame.
Preferably, when the equipment pipeline is arranged inside the floor structure, the equipment pipeline is connected to the light steel frame at the splicing position between the adjacent floor modules before the fifth step.
Compared with the prior art, the invention has the following characteristics and beneficial effects.
1. In the cold-formed thin-wall steel well-type floor slab structure, the floor slab modules are filled with heat-insulating and sound-insulating materials in the well-shaped combined light steel frame, light concrete and fireproof gypsum board suspended ceilings are poured on the profiled steel sheets, equipment pipelines and the like can be arranged in the space between the adjacent modules to be composited, and the structure-heat insulation-sound insulation-equipment pipeline integration of the floor slab structure is realized.
2. The cold-formed thin-wall steel well-word floor slab has strong structural stability: the floor structure adopts prefabricated floor modules and cast-in-situ light concrete floors, and compared with the assembled floor, the cast-in-situ light concrete wet method ensures that the floor structure has stronger bearing capacity and sound insulation performance.
3. The cold-formed thin-wall steel well-word floor slab structure has high assembly degree: the factory prefabrication degree of the set of floor slab modules is high, and the space for pouring the light concrete layer is preset on the floor slab modules, so that the in-situ pouring can be realized; the invention has simple structure, less construction level of the floor slab structure, convenient and quick field installation and connection, can reduce the field construction workload, and is suitable for industrialized building production.
4. The cold-formed thin-wall steel well-word floor slab structure has the advantages of good sound insulation performance, good waterproof and fireproof performances, high bearing capacity, suitability for the requirements of stability performance of various rooms, and low maintenance frequency after construction.
Drawings
The invention is described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic view of the light steel frame structure of the present invention.
Fig. 2 is a schematic perspective view of a floor module according to the present invention.
Figure 3 is a schematic cross-sectional view of a floor module of the present invention.
Fig. 4 is a schematic view of the structure of the invention for casting a lightweight concrete layer on a floor slab module.
FIG. 5 is a schematic view of the node structure of the longitudinal section bar and the transverse section bar according to the present invention.
Fig. 6 is a schematic perspective view of the connection of adjacent floor modules of the present invention.
Figure 7 is a schematic cross-sectional view of the connection of adjacent floor modules of the present invention.
Fig. 8 is a schematic view of the node structure of the adjacent floor module connection of the present invention.
Reference numerals: 1-floor module, 1.1-light steel frame, 1.1.1-vertical section steel rod piece, 1.1.2-horizontal section steel rod piece, 1.2-heated board, 1.3-profiled steel sheet, 2-baffle, 3-first connecting plate, 4-second connecting plate, 5-connecting piece, 6-light concrete layer.
Detailed Description
As shown in fig. 1-8, the cold-formed thin-wall steel well-word floor slab structure comprises a group of floor slab modules 1 which are connected in a spliced mode in sequence and a light concrete layer 6 which is poured on the group of floor slab modules 1; the floor slab module 1 comprises a light steel frame 1.1, a heat preservation plate 1.2 and a profiled steel sheet 1.3; the light steel frame 1.1 is a rectangular frame structure formed by connecting a group of longitudinal steel rod pieces 1.1.1 and at least two groups of transverse steel rod pieces 1.1.2; the heat insulation plates 1.2 are provided with a group of heat insulation plates which are correspondingly filled in the grids of the light steel frame 1.1; the profiled steel sheet 1.3 is paved on the top of the light steel frame 1.1 and covers a group of heat insulation boards 1.2; baffle plates 2 are arranged on one side of the top of each floor slab module 1 along the longitudinal edge of the light steel frame 1.1 in a full length mode, and the baffle plates 2 on the spliced adjacent floor slab modules 1 form side templates for pouring the light concrete layers 6; a first connecting plate 3 is arranged at the bottom of each floor slab module 1; wherein each first connecting plate 3 is arranged along the bottom edge of the light steel frame 1.1 in a through length manner; the bottoms of two adjacent floor slab modules 1 are connected through a first connecting plate 3; the lightweight concrete layer 6 is poured on the top of the profiled steel sheet 1.3 between the adjacent baffles 2.
In this embodiment, the light steel frame 1.1 is a combined light steel frame; the section of the longitudinal steel rod piece 1.1.1 is I-shaped, a group of longitudinal steel rod pieces 1.1.1 are arranged at intervals in parallel along the transverse direction, wherein the two outermost longitudinal steel rod pieces 1.1.1 are made of H-shaped cold-formed thin-wall steel, and the inner longitudinal steel rod piece 1.1.1 is made of H-shaped steel with the through length; the section of the transverse section steel rod piece 1.1.2 is I-shaped; each group of transverse steel rod pieces 1.1.2 are arranged between adjacent longitudinal steel rod pieces 1.1.1 at intervals in parallel along the longitudinal direction, wherein the outermost transverse steel rod piece 1.1.2 is made of H-shaped cold-formed thin-wall steel, and the inner transverse steel rod piece 1.1.2 is made of I-steel; the end part of the transverse section steel rod piece 1.1.2 is inserted between the upper flange and the lower flange of the longitudinal section steel rod piece 1.1.1, and the joint position of the web plate of the longitudinal section steel rod piece 1.1.1 and the web plate of the transverse section steel rod piece 1.1.2 is connected by adopting a second connecting plate 4; the section of the second connecting plate 4 is L-shaped, is used as a reinforcing piece and is fixed through self-tapping screws, so that the orthogonal node form of the longitudinal section steel rod piece 1.1.1 and the transverse section steel rod piece 1.1.2 is rigid connection.
In this example, the profiled sheet 1.3 is a normal profiled sheet and is manufactured according to the size requirements.
In this embodiment, the cross section of the baffle 2 is in an inverted T shape, and includes a transverse edge and a vertical edge connected to the middle of the top of the transverse edge; the transverse edges of the baffle plates 2 are lapped on the top surface of the light steel frame 1.1, and the vertical edges of the baffle plates 2 are flush with the longitudinal side surfaces of the corresponding sides of the light steel frame 1.1; the vertical edges of the baffle plates 2 and the profiled steel sheets 1.3 form a groove for pouring the lightweight concrete layer 6.
In this embodiment, the thermal insulation board 1.2 may be glass wool, polystyrene foam board or rock wool.
In this embodiment, the cross section of the first connecting plate 3 is L-shaped and made of angle steel, and includes a transverse edge and a vertical edge connected to one side of the transverse edge; the transverse edge of the first connecting plate 3 is connected to the bottom surface of the light steel frame 1.1, and the vertical edge of the first connecting plate 3 is flush with the side surface of the corresponding side of the light steel frame 1.1.
In this embodiment, holes are formed on the vertical edges of the first connecting plates 3 at intervals along the long axis direction thereof, and adjacent first connecting plates 3 are connected by connecting members 5 penetrating through the holes.
In this embodiment, the connecting member 5 is a bolt.
The construction method of the cold-formed thin-wall steel well-word floor slab structure comprises the following steps.
Step one, preparing materials: the light steel frame 1.1 of the floor slab module 1 is prefabricated in a factory, and connecting parts such as a transverse steel rod piece 1.1.2, a longitudinal steel rod piece 1.1.1, a baffle plate 2, a first connecting plate 3, a profiled steel plate 1.3 and the like, a second connecting plate 4, a self-tapping screw and the like are prepared in the factory.
Step two, manufacturing a light steel frame 1.1, and filling a heat insulation board 1.2 in a frame lattice of the light steel frame 1.1; the longitudinal steel rod pieces 1.1.1 in the light steel frame 1.1 are made of I-steel, and the transverse steel rod pieces 1.1.2 with the connecting length of 600mm at intervals of 600mm in the adjacent longitudinal steel rod pieces 1.1.1 make the light steel frame 1.1 form a small lattice with 600 mm; after the light steel frame 1.1 is assembled, filling the inside of the light steel frame with a glass wool board with heat preservation and sound insulation performance as a heat preservation board 1.2: firstly, cutting the glass wool board according to the design size of 600mm, and filling the glass wool board in blocks; the splicing part of the heat-insulating board 1.2 is adhered to the part contacted with the light steel frame 1.1 by coating epoxy resin glue, so that the integrity of the glass wool board and the light steel frame 1.1 is enhanced; in order to prevent the glass wool board from being wetted and the light steel frame 1.1 from being scratched during transportation, the floor slab module 1 can be packaged with an industrial preservative film.
Third, arranging first connecting plates 3 at the bottom of the light steel frame 1.1 and along the edges of the periphery respectively; wherein the first connecting plate 3 on each side is arranged along the side edge of the light steel frame 1.1 in a through length manner; first connecting plates 3 are respectively arranged at the bottom and along the peripheral edges of the light steel frame 1.1; the periphery of the lower part of the light steel frame 1.1 is connected with one side of the longitudinal steel rod piece 1.1.1 by using self-tapping screws; meanwhile, a baffle plate 2 is arranged on one side of the top of the light steel frame 1.1, the connection mode of the inverted T-shaped baffle plate 2 is consistent with that of the first connecting plate 3 with the through length at the lower part, and the baffle plate and the first connecting plate are connected by self-tapping screws; in connection with the first connection plate 3 and the baffle 2, corner treatments are required to ensure that the light steel frame 1.1 has no relative height difference between the bottom and top levels.
And fourthly, paving the profiled steel sheet 1.3 on the top of the light steel frame 1.1 to manufacture the floor slab module 1.
And fifthly, splicing a group of floor slab modules 1 between walls of a main body structure in sequence according to the design positions, wherein longitudinal profile steel rods 1.1.1 of adjacent floor slab modules 1 are spliced and connected, a groove for pouring light concrete is formed by baffle plates 2 and profiled steel plates 1.3 on the adjacent floor slab modules 1 together, and a light concrete layer 6 with the thickness of 50mm is poured inside the groove.
Pouring a light concrete layer 6 between the tops of a group of floor slab modules 1 and adjacent baffle plates 2; and finishing the construction.
In the second embodiment, in the step two, the longitudinal section steel rod 1.1.1 of the light steel frame 1.1 is i-steel with a through length, the transverse section steel rod 1.1.2 is i-steel, the flange of the transverse section steel rod 1.1.2 is inserted between the upper flange and the lower flange of the longitudinal section steel rod 1.1.1, and the web of the longitudinal section steel rod 1.1.1 and the web of the transverse section steel rod 1.1.2 are connected by adopting a second connecting plate 4 at the joint position; the section of the second connecting plate 4 is L-shaped and comprises a transverse edge and a longitudinal edge connected to one side of the transverse edge; the transverse edge of the second connecting plate 4 is connected to the web of the transverse section steel rod piece 1.1.2, and the longitudinal edge of the second connecting plate 4 is connected to the web of the longitudinal section steel rod piece 1.1.1.
In the second embodiment, an adhesive is coated on the contact surface of the heat insulation board 1.2 and the light steel frame 1.1.
In the embodiment, the part of the baffle plate 2 beyond the longitudinal section steel rod pieces 1.1.1 and the longitudinal section steel rod pieces 1.1.1 spliced together form a groove for inserting the pipeline together, so that the pipeline is convenient to install; when equipment pipelines are arranged inside the floor slab structure, the equipment pipelines are connected in grooves on the light steel frame 1.1 at splicing positions between the adjacent floor slab modules 1 by using ties or lead wires before the step five.
The above embodiments are not exhaustive of the specific embodiments, and other embodiments are possible, and the above embodiments are intended to illustrate the present invention, not to limit the scope of the present invention, and all applications that come from simple variations of the present invention fall within the scope of the present invention.
Claims (5)
1. The cold-formed thin-wall steel well-word floor slab structure comprises a group of floor slab modules (1) which are connected in sequence in a spliced mode and a light concrete layer (6) which is poured on the group of floor slab modules (1); the method is characterized in that: the floor slab module (1) comprises a light steel frame (1.1), a heat insulation board (1.2) and a profiled steel sheet (1.3); the light steel frame (1.1) is a rectangular frame structure formed by connecting a group of longitudinal steel rod pieces (1.1.1) and at least two groups of transverse steel rod pieces (1.1.2); the heat insulation plates (1.2) are provided with a group of grids correspondingly filled in the light steel frame (1.1); the profiled steel sheet (1.3) is paved on the top of the light steel frame (1.1) and covers a group of heat-insulating boards (1.2); a baffle (2) is arranged on one side of the top of each floor slab module (1) along the longitudinal edge of the light steel frame (1.1) in a full length way, and the baffles (2) on the spliced adjacent floor slab modules (1) form a side template for pouring the light concrete layer (6); a first connecting plate (3) is arranged at the bottom of each floor slab module (1); wherein each first connecting plate (3) is arranged along the bottom edge of the light steel frame (1.1) in a through length manner; the bottoms of two adjacent floor slab modules (1) are connected through a first connecting plate (3); the lightweight concrete layer (6) is poured between the top of the profiled steel sheet (1.3) and the adjacent baffle plates (2);
the section of the longitudinal section steel rod piece (1.1.1) is I-shaped, and a group of longitudinal section steel rod pieces (1.1.1) are arranged at intervals in parallel along the transverse direction; the cross section of the transverse steel rod piece (1.1.2) is I-shaped, wherein each group of transverse steel rod pieces (1.1.2) are arranged between adjacent longitudinal steel rod pieces (1.1.1) at intervals in parallel along the longitudinal direction; the end part of the transverse section steel rod piece (1.1.2) is inserted between the upper flange and the lower flange of the longitudinal section steel rod piece (1.1.1), and the joint position of the web plate of the longitudinal section steel rod piece (1.1.1) and the web plate of the transverse section steel rod piece (1.1.2) is connected by adopting a second connecting plate (4);
the section of the baffle (2) is in an inverted T shape and comprises a transverse edge and a vertical edge connected to the middle of the top of the transverse edge; the transverse edges of the baffle plates (2) are lapped on the top surface of the light steel frame (1.1), and the vertical edges of the baffle plates (2) are flush with the longitudinal side surface of the corresponding side of the light steel frame (1.1);
the section of the first connecting plate (3) is L-shaped and comprises a transverse edge and a vertical edge connected to one side of the transverse edge; the transverse edge of the first connecting plate (3) is connected to the bottom surface of the light steel frame (1.1), and the vertical edge of the first connecting plate (3) is flush with the side surface of the corresponding side of the light steel frame (1.1);
holes are formed in the vertical edges of the first connecting plates (3) at intervals along the long axis direction of the vertical edges, and adjacent first connecting plates (3) are connected through connecting pieces (5) penetrating through the holes.
2. A method of constructing a cold-formed thin-walled steel well-word floor structure as claimed in claim 1, comprising the steps of:
step one, preparing materials;
step two, manufacturing a light steel frame (1.1), and filling a heat insulation board (1.2) in a frame lattice of the light steel frame (1.1);
third, arranging first connecting plates (3) at the bottom of the light steel frame (1.1) along the edges of the periphery respectively; wherein the first connecting plate (3) on each side is arranged along the side edge of the light steel frame (1.1) in a through length manner; meanwhile, a baffle plate (2) is arranged at one side of the top of the light steel frame (1.1), and the baffle plate (2) is arranged along the longitudinal side edge in a full length mode;
step four, paving profiled steel sheets (1.3) on the top of the light steel frame (1.1) to manufacture a floor slab module (1);
step five, splicing a group of floor slab modules (1) in sequence according to the design positions, wherein longitudinal profile steel rods (1.1.1) of adjacent floor slab modules (1) are spliced and connected;
pouring a light concrete layer (6) between the top of a group of floor slab modules (1) and adjacent baffle plates (2); and finishing the construction.
3. The construction method of the cold-formed thin-walled steel well-word floor structure according to claim 2, wherein the construction method comprises the following steps: in the second step, the section of the longitudinal steel rod piece (1.1.1) of the light steel frame (1.1) is I-shaped, the section of the transverse steel rod piece (1.1.2) is I-shaped, the flange of the transverse steel rod piece (1.1.2) is inserted between the upper flange and the lower flange of the longitudinal steel rod piece (1.1.1), and the web joint position of the web of the longitudinal steel rod piece (1.1.1) and the web joint position of the transverse steel rod piece (1.1.2) is connected by adopting a second connecting plate (4); the section of the second connecting plate (4) is L-shaped and comprises a transverse edge and a longitudinal edge connected to one side of the transverse edge; the transverse edge of the second connecting plate (4) is connected to the web plate of the transverse section steel rod piece (1.1.2), and the longitudinal edge of the second connecting plate (4) is connected to the web plate of the longitudinal section steel rod piece (1.1.1).
4. The construction method of the cold-formed thin-walled steel well-word floor structure according to claim 3, wherein the construction method comprises the following steps: in the second step, the contact surface of the heat insulation board (1.2) and the light steel frame (1.1) is coated with adhesive.
5. The construction method of the cold-formed thin-walled steel well-word floor structure according to claim 2, wherein the construction method comprises the following steps: when equipment pipelines are arranged inside the floor slab structure, the equipment pipelines are connected to the light steel frames (1.1) at splicing positions between the adjacent floor slab modules (1) before the step five.
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| CN109372170B (en) * | 2018-12-19 | 2024-02-23 | 武汉悉道建筑科技有限公司 | Assembled sound insulation floor system and manufacturing method thereof |
| CN110185233B (en) * | 2019-06-24 | 2024-01-05 | 中建二局第三建筑工程有限公司 | Insulation structure of rectangular air pipe and construction method thereof |
| CN110374239A (en) * | 2019-08-15 | 2019-10-25 | 吉林建筑大学 | A kind of open tubular column grating type floor plates |
| CN110984450A (en) * | 2019-12-20 | 2020-04-10 | 陕西博睿信息科技有限公司 | Laying structure of steel structure house floor bearing plate |
| CN111622403B (en) * | 2020-05-22 | 2021-07-09 | 江苏科技大学 | Cold-formed thin-wall section steel composite floor and modular prefabrication and assembly method thereof |
| CN111851794A (en) * | 2020-06-30 | 2020-10-30 | 同济大学 | Heat-insulation and decoration integrated light steel keel composite wallboard and manufacturing method thereof |
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