A composite floor slab of corrugated steel plate, light steel frame and foamed concrete and its installation method

Abstract

The present invention discloses a composite floor of corrugated steel plate and light steel frame with foamed concrete and an installation method thereof, comprising a light steel frame, wherein an alkali-resistant mesh cloth is arranged on the bottom surface of the light steel frame; a steel wire mesh is arranged on the bottom surface of the alkali-resistant mesh cloth, and a corrugated steel plate is arranged on the top surface of the light steel frame; the steel wire mesh is welded to the light steel frame, and the corrugated steel plate and the light steel frame are fixedly connected; and foamed concrete is filled between the steel wire mesh and the corrugated steel plate. The present invention provides a composite floor of corrugated steel plate and light steel frame with foamed concrete and an installation method thereof, so as to solve the problems in the prior art that foamed concrete floors are easy to crack, have poor waterproof effects, and are difficult to route, thereby reducing the risk of cracking of foamed concrete floors, while improving waterproof performance and facilitating the arrangement of various pipelines.

Description

Technical Field

[0001] The invention relates to the field of floor slabs of prefabricated buildings, and in particular to a corrugated steel plate, light steel frame, foam concrete composite floor slab and an installation method thereof. Background Art

[0002] According to the preparation process, concrete slabs can be divided into cast-in-place slabs and precast slabs. With the continuous development of prefabricated buildings, the quality requirements for precast concrete slabs are gradually increasing. Traditional precast concrete slabs are reinforced by a large number of built-in steel bars, which have the disadvantages of being very easy to crack and having a large deadweight.

[0003] Foamed concrete, also known as foamed concrete, is a new type of concrete material containing a large number of closed pores formed by fully foaming the foaming agent mechanically, evenly mixing the foam with cement slurry, and then passing through the pumping system of the foaming machine for cast-in-place construction or mold forming, and naturally curing. Foamed concrete has the advantages of light weight, heat preservation, sound insulation, and fire prevention, and has gradually been used in the production and preparation of concrete floor slabs. However, the concrete floor slabs prepared by foamed concrete in the prior art still have the problem of easy cracking, and this cracking does not only occur at the joints between the slabs, but may also occur inside and on the surface of the concrete floor slabs themselves, which undoubtedly brings great difficulties to the maintenance and maintenance of prefabricated buildings. In addition, traditional foamed concrete floors also have problems such as poor waterproofing and difficulty in routing prefabricated slabs. Summary of the invention

[0004] The present invention provides a corrugated steel plate light steel skeleton foam concrete composite floor and an installation method thereof, so as to solve the problems in the prior art that the foam concrete floor is easy to crack, has poor waterproof effect, and is difficult to lay out. The cracking risk of the foam concrete floor is reduced, and at the same time the waterproof performance is improved and the purpose of facilitating the layout of various pipelines is achieved.

[0005] The present invention is achieved through the following technical solutions:

[0006] A composite floor slab of corrugated steel plate and light steel frame and foamed concrete comprises a light steel frame, an alkali-resistant mesh cloth is arranged on the bottom surface of the light steel frame; a steel wire mesh is arranged on the bottom surface of the alkali-resistant mesh cloth, and a corrugated steel plate is arranged on the top surface of the light steel frame; the steel wire mesh is welded to the light steel frame, and the corrugated steel plate and the light steel frame are fixedly connected; and foamed concrete is filled between the steel wire mesh and the corrugated steel plate.

[0007] In view of the problems in the prior art that foam concrete floors are prone to cracking, have poor waterproofing effects, and are difficult to route, the present invention first proposes a corrugated steel plate light steel frame foam concrete composite floor, which includes a light steel frame, a steel mesh below the light steel frame, and a corrugated steel plate above the light steel frame; the present application sets an alkali-resistant mesh cloth between the steel mesh and the bottom surface of the light steel frame. Through the combined effect of the alkali-resistant mesh cloth and the steel mesh, as well as the effect of the corrugated steel plate, the internal and surface cracking problems of the concrete floor itself can be significantly reduced, the service life of the foam concrete floor can be significantly improved, and the frequency and cost of its maintenance and maintenance can be reduced. In addition, the corrugated steel plate in the present application can be directly connected to the light steel frame, and the steel mesh can be welded to the light steel frame through the mesh on the alkali-resistant mesh cloth. The present application also pours foam concrete between the steel mesh and the corrugated steel plate, and the desired composite floor can be obtained after final setting.

[0008] The composite floor defined in the present application, in addition to having good crack resistance, can significantly improve the waterproof ability of the composite floor due to the presence of the corrugated steel plate, and has a significant contribution to solving the defect of easy interlayer leakage in prefabricated buildings; in addition, the corrugated area on the top of the corrugated steel plate will form a number of parallel troughs, which can be used as pipeline laying channels in the present application. Therefore, the present application can also solve the defect that traditional foam concrete prefabricated floors are not convenient for wiring, thereby further improving the ease of use of foam concrete prefabricated floors.

[0009] Furthermore, the alkali-resistant mesh cloth has at least two layers, and the meshes on the two adjacent layers of alkali-resistant mesh cloth are arranged in a staggered manner. In this solution, the meshes of any two adjacent layers of alkali-resistant mesh cloth are arranged in a staggered manner, that is, the meshes of any two layers of alkali-resistant mesh cloth do not overlap and the meshes face different directions, which can reduce the stress concentration problem inside the foam concrete and significantly improve the crack resistance of the floor slab.

[0010] Furthermore, the corrugated steel plate and the light steel frame are fixedly connected by a plurality of drill screws, and the spacing between adjacent drill screws is 200 to 250 mm.

[0011] This solution uses drill-tipped screws to fix the corrugated steel plate on the light steel frame. The use of a large number of drill-tipped screws can prevent the corrugated steel plate from slipping longitudinally relative to the light steel frame, thereby ensuring the integrity and structural stability of the composite floor of this application.

[0012] Furthermore, the light steel frame includes a plurality of mutually perpendicular first steel sections and second steel sections; the first steel section has a first notch formed at the top, and the first steel section has a second notch formed at the side facing the first notch, and the first notch and the second notch are both matched with the second steel section; the bottom surface of the second steel section is placed on the inner bottom surface of the first steel section, and the top surface of the second steel section is at the same height as the top surface of the first steel section.

[0013] The traditional light steel frame, which is made of two groups of steel sections, generally uses the main steel purlins without processing and connects them by inserting the cuts of the secondary steel purlins. This traditional connection method firstly causes the secondary steel purlins to be unable to extend to the other side of the main steel purlins, and can only rely entirely on the main steel purlins to achieve connection with the steel beams below, with relatively weak bearing capacity and relatively insufficient structural stability. Secondly, this traditional connection method will cause the top surface heights of the main steel purlins and the secondary steel purlins to be unequal, resulting in the light steel frame having more surfaces that need to be consolidated with concrete, which makes it more likely to dislocate and induce cracks under uneven force.

[0014] In order to overcome the above problems, the light steel frame of this solution opens a first notch from the top of the first steel section and opens a second notch on the side of the first steel section, wherein the first notch and the second notch are directly opposite to each other, so as to facilitate the second steel section to enter the first notch and the second notch at the same time. The first notch and the second notch are matched with the second steel section, which means that the second steel section can enter the first notch and the second notch and fill the first notch and the second notch, and the sizes are matched with each other.

[0015] When forming a light steel frame, the present solution places the second steel directly inside the first steel, and the top surface of the second steel is at the same height as the top surface of the first steel. Compared with the traditional light steel frame, the second steel in the present application can extend to the other side of the first steel, so both the first steel and the second steel can be connected to the steel beam below. Compared with the prior art that only connects the steel beams through the first steel, the bearing capacity and structural stability of the prefabricated steel structure building are significantly improved. In addition, since the present solution can make the top surface of the second steel coplanar with the top surface of the first steel, the concrete consolidation surface is reduced, thereby reducing the risk of dislocation inside the floor slab under uneven force, and further improving the crack resistance of the concrete floor slab.

[0016] Furthermore, the first steel section and the second steel section are both C-shaped steel sections; the second notch is opened from the open side of the C-shaped steel section, and the bottom ends of the first notch and the second notch are both at the same height as the inner bottom surface of the first steel section; and also include a connecting piece for connecting to the end of the first steel section and / or the second steel section; the connecting piece is a C-shaped steel section partially nested inside the first steel section and / or the second steel section.

[0017] Those skilled in the art should understand that the open side in the present application refers to the open side of the C-shape. In order to ensure the stable insertion of the second steel section, the first notch can be considered as an inverted L-shaped notch. The bottom ends of the first notch and the second notch are both at the same height as the inner bottom surface of the first steel section to ensure that the load on the second steel section is evenly and stably transferred to the first steel section.

[0018] In addition, the light steel frame in the prior art needs to rely on its own body to achieve the connection with the steel beam below, and the connection method is mostly welding, which will inevitably cause the stress distribution inside the light steel frame to change when it bears the upper load; and affected by the different technical levels of welders, it is easy to bring uncontrollable stress risks to the light steel frame. Based on this, the present scheme sets a connector at the end of the first steel and / or the second steel, so that the connector is partially nested in the corresponding first steel and / or the second steel; the connector is a C-shaped steel structure with a smaller size than the corresponding first steel and / or the second steel. The connector can be set only at the end of the first steel and / or the second steel that needs to be connected to the steel beam below, the connector is fixed to the corresponding first steel and / or the second steel, and then welded to the steel beam below through the connector, which can eliminate the interference of the stress distribution inside the light steel frame body due to the welding process and reduce the stress risk of the light steel frame.

[0019] Furthermore, it also includes a placeholder block for inserting into the interior of the connecting piece, a baffle is set on the side of the placeholder block, and L-shaped bayonet is set on the upper and lower ends of the end of the placeholder block; the baffle matches the side opening of the connecting piece, and the L-shaped bayonet matches the upper and lower edges of the connecting piece.

[0020] During the prefabrication process of the floor slab of the present application, the connecting parts need to be fixed and installed in advance. However, if the first threaded hole on the connecting part is also solidified by the foam concrete, it will be extremely difficult to replace the connecting part during the later installation. In addition, the connecting part is also related to the subsequent steps such as splicing of the floor slab. If the inside of the connecting part is filled with concrete, it will easily interfere with the subsequent splicing.

[0021] Therefore, the present solution is also equipped with a placeholder block. Before pouring the foam concrete, the placeholder block is inserted into the corresponding connecting piece so that the L-shaped snap-in at the upper end of the placeholder block clamps the upper edge of the connecting piece, and the L-shaped snap-in at the lower end of the placeholder block clamps the lower edge of the connecting piece. At this time, the baffle is located exactly at the side notch of the connecting piece, and the internal space of the connecting piece is blocked by the placeholder block to prevent foam concrete from entering the interior of the connecting piece and interfering with subsequent replacement or splicing.

[0022] Furthermore, it also includes a seam assembly for connecting between two connecting parts; the seam assembly includes a vertical plate, a positioning platform located on the top of the vertical plate, a first positioning strip located on the positioning platform, and two second positioning strips are arranged on both sides of the first positioning strip; the first positioning strip is located directly above the vertical plate, and the first positioning strip and the second positioning strip are perpendicular to each other.

[0023] If the connectors between two adjacent composite floor slabs are directly connected, obvious joints will inevitably appear, which will easily cause cracks at the joints between the slabs. Based on this, this solution uses a joint assembly to connect two adjacent floor slabs. The vertical plate of the joint assembly is placed vertically on the steel beam below and welded. The bottom plates of the connectors on both sides are located on the steel beam and on both sides of the vertical plates respectively; the inner wall of the top plate of the connector is in contact with the upper surface of the positioning platform, and the end of the top plate of the connector abuts against the side wall of the first positioning strip; at the same time, the second positioning strips on both sides respectively limit the connector from both sides to limit the lateral displacement of the connector and ensure the facing splicing of the floor slabs on both sides. Through the use of the joint assembly, this solution can eliminate the longitudinal joint between two adjacent connectors, and at the same time significantly improve the lateral stability of the floor slabs when splicing and reduce the difficulty of splicing.

[0024] Furthermore, a plurality of slide grooves are provided on the positioning platform, the axes of the slide grooves are parallel to the axes of the first positioning strips, and the second positioning strips are slidably fitted in the corresponding slide grooves;

[0025] The bottom of the second positioning bar is fixedly connected to the slider, the slider is hinged to the first transmission shaft, the end of the first transmission shaft away from the slider is hinged to the second transmission shaft, and the end of the second transmission shaft away from the first transmission shaft is connected to the driving block; the top surface of the positioning platform is provided with a mounting groove, the slider, the first transmission shaft and the second transmission shaft are all located in the mounting groove, and the second transmission shaft is rotatably connected to the groove wall of the mounting groove through the rotating shaft; the groove wall of the mounting groove has an arc-shaped portion that is always in contact with the driving block; and also includes a torsion spring connected to the rotating shaft;

[0026] Two slots are provided on both side end surfaces of the positioning platform away from the first positioning strip, and the two slots are used for inserting the side walls of the connecting piece respectively; the sliding groove and the mounting groove are both located between the ends of the slots and the first positioning strip;

[0027] When no external force is applied, the top surface height of the driving block is higher than the top surface height of the positioning platform;

[0028] When the driving block moves downward, the second positioning bar moves toward the center of the positioning platform.

[0029] Preferably, in this solution, two slots are provided on both side end surfaces of the positioning platform away from the first positioning strip, and the two slots are respectively used for inserting the side walls of the connector; the slide groove and the installation groove are both located between the ends of the slots and the first positioning strip.

[0030] When the top plate of the connecting piece is placed on the positioning platform, its gravity and the load above are transmitted to the positioning platform, pressing the driving block down until it is completely inserted into the installation groove. During the downward movement of the driving block, the crank slider mechanism composed of the second transmission shaft, the first transmission shaft and the slider drives the second positioning bar to slide along the slide groove and move toward the center of the positioning platform, thereby squeezing and clamping the connecting piece from both sides. This structure can utilize the deadweight of the floor slab to achieve stable clamping of the connecting piece, significantly improving the lateral stability of the connecting piece. At the same time, since the second positioning bars on both sides move inward synchronously, they also have the function of automatically calibrating and centering the connecting piece.

[0031] This solution provides two slots to ensure that both sides of the connector can enter so that the top plate of the connector can be placed on the positioning table; at the same time, the slide groove and the installation groove will not interfere with the slots.

[0032] Based on the installation method of the profiled steel plate light steel frame foam concrete composite floor in this application, the composite floor is connected to the steel beam by the following method:

[0033] A connecting piece is preset at the end of the first steel section and / or the second steel section, and the connecting piece is a C-shaped steel partially embedded inside the first steel section and / or the second steel section;

[0034] The portion of the connecting member extending outside the first steel section and / or the second steel section is seated on the steel beam;

[0035] Full welding is performed between the lower flange of the extended part of the connector and the upper flange of the steel beam.

[0036] Furthermore, adjacent composite slabs are spliced ​​by the following method:

[0037] Weld the vertical plate to the set position on the top of the steel beam;

[0038] Move the two floor slabs to be spliced ​​laterally from both sides, so that the connecting pieces on the two floor slabs respectively enter the positioning platforms on both sides of the first positioning strip, until the ends of the connecting pieces on both sides respectively abut against the two sides of the first positioning strip;

[0039] The bottom of the welded connector is connected to the steel beam, and the top of the welded connector is connected to the first positioning strip.

[0040] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0041] 1. The present invention discloses a corrugated steel plate light steel skeleton foam concrete composite floor and an installation method thereof, which can significantly reduce the internal and surface cracking problems of the concrete floor itself, significantly increase the service life of the foam concrete floor, and reduce the frequency and cost of its maintenance.

[0042] 2. The present invention provides a corrugated steel plate light steel skeleton foam concrete composite floor and an installation method thereof, which can significantly improve the waterproof capability of the composite floor and make a significant contribution to solving the defect of easy inter-layer water leakage in prefabricated buildings.

[0043] 3. The corrugated steel plate light steel frame foam concrete composite floor and its installation method of the present invention can also solve the defect that the traditional foam concrete prefabricated floor is not convenient for wiring, thereby further improving the convenience of using the foam concrete prefabricated floor.

[0044] 4. The present invention provides a corrugated steel plate light steel skeleton foam concrete composite floor and an installation method thereof, which reduces the concrete consolidation surface, thereby reducing the risk of dislocation inside the floor under uneven stress conditions, and further improves the crack resistance of the concrete floor.

[0045] 5. The present invention provides a corrugated steel plate light steel frame foam concrete composite floor and an installation method thereof. Through the connecting parts, the interference of the internal stress distribution of the light steel frame due to the uneven welding process level can be eliminated, thereby reducing the stress risk of the light steel frame.

[0046] 6. The present invention provides a corrugated steel plate, light steel frame, foam concrete composite floor and installation method thereof, which can overcome the problem of floor joints; and can utilize the deadweight of the floor to achieve stable clamping of the connecting parts, significantly improving the lateral stability of the connecting parts; and also has the function of automatically calibrating and centering the connecting parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0048] Figure 1 is a cross-sectional view of a specific embodiment of the present invention;

[0049] Figure 2 It is a plan view of a light steel frame in a specific embodiment of the present invention;

[0050] Figure 3 It is a partial schematic diagram of the first steel section in a specific embodiment of the present invention;

[0051] Figure 4 It is a partial schematic diagram of a light steel frame in a specific embodiment of the present invention;

[0052] Figure 5 It is a schematic diagram of the installation of the connecting piece in a specific embodiment of the present invention;

[0053] Figure 6 It is a structural schematic diagram of a connecting member in a specific embodiment of the present invention;

[0054] Figure 7It is a schematic diagram of the structure of a placeholder block in a specific embodiment of the present invention;

[0055] Figure 8 It is a partial cross-sectional view of the splicing of floor slabs in a specific embodiment of the present invention;

[0056] Fig. 9 It is a structural schematic diagram of a seam assembly in a specific embodiment of the present invention;

[0057] Fig.10 for Fig. 9 A partial enlarged view of the middle A;

[0058] Fig.11 It is a partial cross-sectional view of the joint assembly when no external force is applied in a specific embodiment of the present invention;

[0059] Fig.12 It is a partial cross-sectional view of the joint assembly when the driving block moves downward in a specific embodiment of the present invention;

[0060] Fig.13 It is a plan view schematic diagram of a spliced ​​specific embodiment of the present invention.

[0061] Marks and corresponding parts names in the attached drawings:

[0062] 1-alkali-resistant mesh cloth, 2-steel wire mesh, 3-corrugated steel plate, 4-first steel, 5-second steel, 6-first notch, 7-second notch, 8-connecting piece, 9-first threaded hole, 10-second threaded hole, 11-connecting groove, 12-placeholder, 13-baffle, 14-L-shaped bayonet, 15-vertical plate, 16-positioning table, 17-first positioning strip, 18-second positioning strip, 19-slide groove, 20-slider, 21-first transmission shaft, 22-second transmission shaft, 23-driving block, 24-installing groove, 25-rotating shaft, 26-torsion spring, 27-arc-shaped portion, 28-slot, 29-steel beam. DETAILED DESCRIPTION

[0063] In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the examples and the accompanying drawings. The schematic embodiments of the present invention and the description thereof are only used to explain the present invention and are not intended to limit the present invention. In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0064] Embodiment 1:

[0065] like Figure 1 A corrugated steel plate, light steel frame, and foam concrete composite floor slab shown includes a light steel frame, an alkali-resistant mesh cloth 1 is arranged on the bottom surface of the light steel frame; a steel wire mesh 2 is arranged on the bottom surface of the alkali-resistant mesh cloth 1, and a corrugated steel plate 3 is arranged on the top surface of the light steel frame; the steel wire mesh 2 is welded to the light steel frame, and the corrugated steel plate 3 is fixedly connected to the light steel frame; and foam concrete is filled between the steel wire mesh 2 and the corrugated steel plate 3.

[0066] In this embodiment, the diameter of the steel wire of the steel wire mesh 2 is 4 mm and the side length of the mesh is 50 m.

[0067] In this embodiment, the corrugated steel plate 3 and the light steel frame are fixedly connected by a plurality of drill screws; the drill screws used are 4 mm in diameter and 38 mm in length; and the screws are nailed at a longitudinal spacing of 250 mm and a transverse spacing of 200 mm.

[0068] In a more preferred embodiment, the alkali-resistant mesh cloth 1 has at least two layers, and the meshes on two adjacent layers of alkali-resistant mesh cloth 1 are arranged in a staggered manner. The thickness of a single layer of alkali-resistant mesh cloth does not exceed 1 cm.

[0069] Embodiment 2:

[0070] Based on a corrugated steel plate light steel frame foam concrete composite floor slab described in Example 1, the light steel frame in this embodiment is as follows Figures 2 to 6 As shown, it includes a plurality of mutually perpendicular first steel sections 4 and second steel sections 5; the first steel section 4 has a first notch 6 formed at the top, and the first steel section 4 has a second notch 7 formed at the side facing the first notch 6, and both the first notch 6 and the second notch 7 match the second steel section 5; the bottom surface of the second steel section 5 is placed on the inner bottom surface of the first steel section 4, and the top surface of the second steel section 5 is at the same height as the top surface of the first steel section 4.

[0071] The first steel section 4 and the second steel section 5 are both C-shaped steels; the second notch 7 is opened from the open side of the C-shaped steel, and the bottom ends of the first notch 6 and the second notch 7 are both at the same height as the inner bottom surface of the first steel section 4; it also includes a connecting piece 8 for connecting to the end of the first steel section 4 and / or the second steel section 5; the connecting piece 8 is a C-shaped steel partially nested inside the first steel section 4 and / or the second steel section 5.

[0072] In a more preferred embodiment, a placeholder 12 for inserting into the connector 8 is also included. The placeholder 12 is as shown in FIG. Figure 7 As shown, a baffle 13 is provided on its side, and L-shaped bayonet 14 is provided on the upper and lower ends of the end of the placeholder 12; the baffle 13 matches the side opening of the connecting piece 8, and the L-shaped bayonet 14 matches the upper and lower edges of the connecting piece 8.

[0073] In a more preferred embodiment, a first threaded hole 9 is provided at the web of the connector 8, and a second threaded hole 10 is provided at the web of the end of the first steel section 4 and / or the second steel section 5, and the first threaded hole 9 corresponds to and matches the second threaded hole 10. The connector and the corresponding first steel section and / or second steel section are connected by bolts between the webs, which is convenient for installation, disassembly and replacement during the production and installation of the floor slab.

[0074] In a more preferred embodiment, the connector 8 is located on the outer wall of one end inside the first steel section 4 and / or the second steel section 5, and a plurality of connecting grooves 11 are provided; the connecting grooves 11 are open from the end face of the connector 8; and along the axial direction of the connector 8, the groove depth of the connecting groove 11 gradually decreases toward the center direction of the connector 8. Since the connector is partially nested inside the first steel section and / or the second steel section, one end of the connector is located inside the first steel section and / or the second steel section, and the other end is located outside the first steel section and / or the second steel section. In this embodiment, when pouring foam concrete, the foam concrete can enter each connecting groove, thereby increasing the consolidation area between the connector and the corresponding first steel section and / or the second steel section, improving the connection stability between the connector and the first steel section and / or the second steel section, and reducing the risk of bolt shearing. In addition, the groove depth of the connecting groove gradually decreases toward the center direction of the connector, which is conducive to the foam concrete entering the connecting groove to fully fill the interior of the connecting groove, reducing the risk of cavities inside the connecting groove.

[0075] Embodiment 3:

[0076] Based on a corrugated steel plate light steel skeleton foam concrete composite floor slab described in Example 2, Figures 8 to 12 As shown, it also includes a seam assembly for connecting between two connecting members 8; the seam assembly includes a vertical plate 15, a positioning platform 16 located on the top of the vertical plate 15, a first positioning bar 17 located on the positioning platform 16, and two second positioning bars 18 are arranged on both sides of the first positioning bar 17; the first positioning bar 17 is located directly above the vertical plate 15, and the first positioning bar 17 and the second positioning bar 18 are perpendicular to each other.

[0077] A plurality of slide grooves 19 are provided on the positioning platform 16, the axis of the slide groove 19 is parallel to the axis of the first positioning strip 17, and the second positioning strip 18 is slidably fitted in the corresponding slide groove 19;

[0078] The bottom of the second positioning bar 18 is fixedly connected to the slider 20, the slider 20 is hinged to the first transmission shaft 21, the end of the first transmission shaft 21 away from the slider 20 is hinged to the second transmission shaft 22, and the end of the second transmission shaft 22 away from the first transmission shaft 21 is connected to the driving block 23; the top surface of the positioning platform 16 is provided with a mounting groove 24, the slider 20, the first transmission shaft 21 and the second transmission shaft 22 are all located in the mounting groove 24, and the second transmission shaft 22 is rotatably connected to the groove wall of the mounting groove 24 through the rotating shaft 25; the groove wall of the mounting groove 24 has an arc-shaped portion 27 that is always in contact with the driving block 23; and also includes a torsion spring 26 connected to the rotating shaft 25;

[0079] Two slots 28 are provided on both side end surfaces of the positioning platform 16 away from the first positioning strip 17. The two slots 28 are used to insert the side walls of the connecting member 8 respectively; the slide groove 19 and the mounting groove 24 are located between the ends of the slots 28 and the first positioning strip 17;

[0080] When there is no external force, please refer to the attached Fig.11 , the top surface height of the driving block 23 is higher than the top surface height of the positioning platform 16;

[0081] When the drive block 23 moves downward, please refer to the attached Fig.12 , the second positioning bar 18 moves toward the center direction of the positioning platform 16.

[0082] Embodiment 4:

[0083] A method for preparing a light steel skeleton foam concrete composite floor slab, used for preparing the composite floor slab in any of the above embodiments, comprises the following steps:

[0084] 1. Preparation of light steel frame:

[0085] According to the designed light steel skeleton structure, a number of first steel sections 4 are prepared;

[0086] According to the designed light steel skeleton structure, a first notch 6 and a second notch 7 are cut on each first steel section 4.

[0087] Prepare a plurality of second steel sections 5, and pass the second steel sections 5 through the first notches 6 and the second notches 7 on the corresponding first steel sections 4;

[0088] The first steel sections 4 and the second steel sections 5 are welded to obtain a light steel frame.

[0089] 2. Install the light steel frame lower structure:

[0090] Turn the light steel frame upside down so that the bottom of the light steel frame faces upwards;

[0091] Lay at least two layers of alkali-resistant mesh cloth 1 on the inverted light steel frame, and make the meshes of any two adjacent layers of alkali-resistant mesh cloth 1 staggered;

[0092] In this state, the steel wire mesh 2 is laid on the topmost alkali-resistant mesh cloth 1, and the steel wire mesh 2 is compacted;

[0093] According to the designed welding point position, the alkali-resistant mesh cloth 1 at the welding point is broken, and the steel wire mesh 2 and the light steel frame are welded.

[0094] 3. Install the light steel skeleton superstructure:

[0095] Turn over the light steel frame again to restore it to the bottom-down position;

[0096] The corrugated steel plate 3 is laid on the light steel frame, and the corrugated steel plate 3 and the light steel frame are fixedly connected by a plurality of drill screws, and the spacing between adjacent drill screws is 200-250 mm.

[0097] Fourth, set up a template between the steel wire mesh 2 and the corrugated steel plate 3, and pour foam concrete; or, place the light steel frame together with the steel wire mesh 2 and the corrugated steel plate 3 into the mold, and pour foam concrete;

[0098] Demoulding and maintenance.

[0099] In a more preferred embodiment, before pouring the foamed concrete, the method further comprises:

[0100] Install the connecting piece 8 into the ends of the first steel section 4 and the second steel section 5, and fix the connecting piece 8 to the corresponding first steel section 4 and the second steel section 5 by bolts;

[0101] Coat the surface of the placeholder block 12 with a release agent in advance, and insert the corresponding placeholder block 12 into each connector 8, so that the baffle 13 on the placeholder block 12 is located at the side notch of the connector 8, the L-shaped snap-in 14 at the upper end of the placeholder block 12 buckles the upper edge of the connector 8, and the L-shaped snap-in 14 at the lower end of the placeholder block 12 buckles the lower edge of the connector 8.

[0102] During the demoulding process, each placeholder 12 is pulled out.

[0103] Embodiment 5:

[0104] The method for using the light steel skeleton foam concrete composite floor slab described in any one of Examples 1 to 3 includes a method for connecting the floor slab and the beam, and a method for splicing the floor slab.

[0105] In this embodiment, the method for connecting the floor slab and the beam includes:

[0106] The portion of the connecting member 8 extending outside the first steel section 4 or the second steel section 5 is located on the steel beam 29;

[0107] Full welding is performed between the lower flange of the extended portion of the connector 8 and the upper flange of the steel beam.

[0108] In this embodiment, the floor slab splicing method includes:

[0109] Vertically weld the vertical plate 15 in the joint assembly to the set position on the top of the steel beam 29;

[0110] Move the two floor slabs to be spliced ​​laterally from both sides, so that the connectors 8 on the two floor slabs enter the positioning platforms 16 on both sides of the first positioning strip 17 respectively, until the ends of the connectors 8 on both sides respectively abut the two sides of the first positioning strip 17. Specifically: the extended part of the connector 8 gradually reaches the top surface of the steel beam 29, and at the same time, the two sides of the connector 8 enter the two slots 28 respectively; as the top surface of the connector gradually enters the positioning platform 16, the driving block 23 is pressed down, so that the driving block 23 moves downward along the arc portion 27 of the groove wall of the installation groove 24. In this process, the second transmission shaft 22, the first transmission shaft 21 and the slider 20 form a crank slider mechanism, so that the second positioning strips 18 on both sides move inward and firmly abut against the side walls of the connector 8.

[0111] Finally, the bottom of the connecting piece 8 and the steel beam 29 are welded, and the top of the connecting piece 8 and the first positioning strip 17 are welded.

[0112] After the splicing is completed in this embodiment, the plane diagram of the beam, column and plate is as follows: Fig.13 shown.

[0113] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0114] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, the term "connected" used in this article can be directly connected or indirectly connected via other components without special explanation.

Claims

1. A composite floor slab of corrugated steel plate, light steel skeleton and foamed concrete, characterized in that: It comprises a light steel frame, wherein an alkali-resistant mesh cloth (1) is arranged on the bottom surface of the light steel frame; a steel wire mesh (2) is arranged on the bottom surface of the alkali-resistant mesh cloth (1), and a corrugated steel plate (3) is arranged on the top surface of the light steel frame; the steel wire mesh (2) is welded to the light steel frame, and the corrugated steel plate (3) is fixedly connected to the light steel frame; and foam concrete is filled between the steel wire mesh (2) and the corrugated steel plate (3); The light steel frame comprises a plurality of mutually perpendicular first steel sections (4) and second steel sections (5); the first steel section (4) is provided with a first notch (6) from the top, and the first steel section (4) is provided with a second notch (7) facing the first notch (6) from the side, and the first notch (6) and the second notch (7) are both matched with the second steel section (5); the bottom surface of the second steel section (5) is placed on the bottom surface inside the first steel section (4), and the top surface of the second steel section (5) is at the same height as the top surface of the first steel section (4); The first steel (4) and the second steel (5) are both C-shaped steels; the second notch (7) is formed from the opening side of the C-shaped steel, and the bottom ends of the first notch (6) and the second notch (7) are both at the same height as the inner bottom surface of the first steel (4); and further comprising a connecting piece (8) for connecting to the end of the first steel (4) and / or the second steel (5); the connecting piece (8) is a C-shaped steel partially embedded in the first steel (4) and / or the second steel (5); It also includes a seam assembly for connecting between two connecting members (8); the seam assembly includes a vertical plate (15), a positioning platform (16) located on the top of the vertical plate (15), and a first positioning strip (17) located on the positioning platform (16), and two second positioning strips (18) are arranged on both sides of the first positioning strip (17); the first positioning strip (17) is located directly above the vertical plate (15), and the first positioning strip (17) and the second positioning strip (18) are perpendicular to each other; A plurality of slide grooves (19) are provided on the positioning platform (16), the axes of the slide grooves (19) are parallel to the axes of the first positioning strips (17), and the second positioning strips (18) are slidably fitted in the corresponding slide grooves (19); The bottom of the second positioning bar (18) is fixedly connected to a slider (20), a first transmission shaft (21) is hingedly connected to the slider (20), an end of the first transmission shaft (21) away from the slider (20) is hingedly connected to a second transmission shaft (22), and an end of the second transmission shaft (22) away from the first transmission shaft (21) is connected to a driving block (23); a mounting groove (24) is provided on the top surface of the positioning platform (16), the slider (20), the first transmission shaft (21) and the second transmission shaft (22) are all located in the mounting groove (24), and the second transmission shaft (22) is rotatably connected to the groove wall of the mounting groove (24) via a rotating shaft (25); the groove wall of the mounting groove (24) has an arc-shaped portion (27) that is always in contact with the driving block (23); and further comprises a torsion spring (26) connected to the rotating shaft (25); Two slots (28) are provided on both side end surfaces of the positioning platform (16) away from the first positioning strip (17), and the two slots (28) are respectively used for inserting the side walls of the connecting member (8); the sliding groove (19) and the mounting groove (24) are both located between the ends of the slots (28) and the first positioning strip (17); When no external force is applied, the top surface height of the driving block (23) is higher than the top surface height of the positioning platform (16); When the driving block (23) moves downward, the second positioning bar (18) moves toward the center of the positioning platform (16).

2. The corrugated steel plate light steel skeleton foam concrete composite floor according to claim 1, characterized in that: The alkali-resistant mesh cloth (1) comprises at least two layers, and the meshes on two adjacent layers of the alkali-resistant mesh cloth (1) are arranged in a staggered manner.

3. The corrugated steel plate light steel skeleton foam concrete composite floor according to claim 1, characterized in that: The corrugated steel plate (3) and the light steel frame are fixedly connected by a plurality of drill screws, and the spacing between adjacent drill screws is 200-250 mm.

4. A corrugated steel plate light steel skeleton foam concrete composite floor according to claim 1, characterized in that: It also includes a placeholder (12) for inserting into the interior of the connecting piece (8), a baffle (13) is provided on the side of the placeholder (12), and L-shaped bayonet (14) is provided at the upper and lower ends of the end of the placeholder (12); the baffle (13) matches the side opening of the connecting piece (8), and the L-shaped bayonet (14) matches the upper edge and the lower edge of the connecting piece (8).

5. A method for installing a corrugated steel plate light steel skeleton foam concrete composite floor according to any one of claims 1 to 4, characterized in that: The composite floor slab is connected to the steel beam (29) by the following method: A connecting piece (8) is preset at the end of the first steel section (4) and / or the second steel section (5), and the connecting piece (8) is a C-shaped steel partially embedded in the first steel section (4) and / or the second steel section (5); The portion of the connecting member (8) extending outside the first steel section (4) and / or the second steel section (5) is seated on the steel beam (29); Full welding is performed between the lower flange of the extended portion of the connecting member (8) and the upper flange of the steel beam.

6. The installation method according to claim 5, characterized in that: Adjacent composite slabs are spliced ​​together using the following methods: The vertical plate (15) is welded vertically to the set position on the top of the steel beam (29); Moving the two floor slabs to be spliced ​​laterally from both sides so that the connecting pieces (8) on the two floor slabs respectively enter the positioning platforms (16) on both sides of the first positioning strip (17) until the ends of the connecting pieces (8) on both sides respectively abut against both sides of the first positioning strip (17); The bottom of the welded connection piece (8) is connected to the steel beam (29), and the top of the welded connection piece (8) is connected to the first positioning strip (17).

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