Anti-cracking construction method for large-area thin-layer laminated floor slab

Abstract

According to the anti-cracking construction method for the large-area thin-layer laminated floor slab, by introducing the design of the steps and the slurry containing grooves, the special connecting plates and the structural sealant, the binding force between the floor cross beams and the prefabricated floor slab is remarkably enhanced, leakage is effectively prevented, the overall structural strength is improved, and the special embedded parts are embedded in advance, so that floor slab connection is strengthened, and the construction efficiency is improved. The vibrating device ensures the compactness of thin-layer concrete, and the intelligent spraying system automatically adjusts maintenance according to data of a humidity sensor, so that the surface crack is avoided, the concrete quality is guaranteed, the construction efficiency and the engineering quality are greatly improved, the cost is reduced, and the service life of a building is prolonged; the problem that cast-in-place concrete is prone to cracking in the construction process of the large-area thin-layer laminated floor slab is solved.

Description

Technical Field

[0001] The invention relates to the field of composite floor slabs, and in particular to a crack-resistant construction method for large-area thin-layer composite floor slabs. Background Art

[0002] With the rapid advancement of urbanization, the construction industry, as the core of the national economic pillar industry, has developed rapidly. While my country's economic development has also put forward higher requirements on the construction technology and construction quality of construction companies.

[0003] Traditional floors are gradually unable to meet the needs of modern buildings due to their large thickness and heavy weight. As a new type of floor, thin-layer floors have received extensive attention and application in China. At present, the research and application of thin-layer floors in China have achieved some results, but they are still in the development stage. Therefore, a basic large-area thin-layer composite floor construction method is needed. For the technical process of large-area thin-layer floors, its performance can be further improved, the cost can be reduced, and the formulation and improvement of relevant standards can be strengthened. Summary of the invention

[0004] The main purpose of the present invention is to provide a method for anti-cracking construction of large-area thin-layer composite floor slabs, which solves the problem that cast-in-place concrete is prone to cracking during the construction of large-area thin-layer composite floor slabs.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a large-area thin-layer composite floor slab anti-cracking construction method, the method comprising: S1. During the construction of floor beams, reserve steps on the inner side of the floor beams and reserve grouting grooves on the base of the steps; S2, hoist the corner floor slabs and the middle floor slabs, lay them on the steps, and connect them with the first connecting plate and the second connecting plate; S3, grouting the grouting groove through the corner slabs and the middle slabs; S4. After grouting is completed, steel mesh is laid on the corner slabs and the middle slabs, and concrete is poured; S5. After pouring the concrete, vibrate the concrete using a vibrating device; S6. After the vibration is completed, multiple spray devices are arranged on the floor beams to cure the concrete to prevent drying and cracking; S7. Complete the construction of the composite floor slab on this floor.

[0006] In the preferred embodiment, in step S2, the corner slabs and the middle slabs are provided with a plurality of first embedded parts and second embedded parts; The first embedded parts of the corner slabs and the middle slabs are distributed along the direction of the grouting grooves, and the second embedded parts are arranged at other edge positions. The first embedded part and the second embedded part are cylindrical, with threads provided on the inner circle and a plurality of wing plates provided on the outer circle, and the wing plates are used to improve the bonding force between the embedded part and the prefabricated plate; A plurality of hook bars are also provided on the upward side of the corner slabs and the middle slabs.

[0007] In the preferred embodiment, a plurality of grouting grooves are provided on one side of the corner slab and the middle slab, and the grouting grooves are consistent in shape and width with the grouting grooves; The first embedded part penetrates the floor slab and is connected with the grouting groove, and the second embedded part does not penetrate the floor slab; In the preferred solution, in step S2, when hoisting the floor slab, the lifting rings are connected to the embedded parts at the four corners of the floor slab to facilitate balance during hoisting. After hoisting in place, the lifting rings are removed for the next floor slab; The joints between the corner slabs and the middle slabs need to be bonded with structural sealant and then connected with the first connecting plate and the second connecting plate. The first connecting plate is used for the connection between two slabs, and the second connecting plate is used for the connection between four slabs. A strain sensor is arranged in the first connecting plate.

[0008] In the preferred embodiment, in step S3, a tensioning member is first used to block part of the first embedded member, leaving two first embedded members at opposite corners, wherein the first embedded member at one corner is used as a grouting hole, and the first embedded member at the other corner is used as a grouting hole; Grouting is performed into the grouting groove through the first embedded part serving as the grouting hole, until the grouting liquid fills the grouting groove and the grouting groove and overflows from the first embedded part serving as the grouting outlet hole; After the slurry overflows, use tensioning parts to seal the grouting holes and the slurry outlet holes to complete the grouting.

[0009] In the preferred embodiment, in step S4, a plurality of humidity sensors are evenly distributed on the steel mesh, and the humidity sensors are used to detect humidity changes during the concrete curing process; The poured concrete is high-strength concrete, in which basalt fibers are added to increase the strength of the concrete.

[0010] In the preferred embodiment, in step S5, the vibrating device includes a vibrating motor, a vibrating plate is provided below the vibrating motor, and a motor bracket is provided between the vibrating motor and the vibrating plate; The vibrating motor is a double-shaft motor. Flywheels are arranged at both ends of the motor shaft. The flywheel is fan-shaped. When the flywheel rotates, the vibrating plate vibrates. A flywheel cover is arranged on the outside of the flywheel to protect the flywheel.

[0011] In the preferred embodiment, arc-shaped transition plates are provided on both sides of the vibrating plate, and the transition plates facilitate the sliding of the vibrating device on the concrete surface; A traction bracket is provided on the outside of the flywheel cover, a fixed truss is provided between the traction brackets, the fixed truss is provided with steel cables in four directions, the steel cables are connected to a movable small winch on the floor beam, and the small winch is used to control the vibrating device to move on the concrete surface.

[0012] In the preferred embodiment, in step S6, the spray device includes a mounting base, a lifting electric cylinder is provided on the mounting base, and a detachable spray head is provided on the lifting rod of the lifting electric cylinder; The best layout position for the sprinkler is centrally symmetrical.

[0013] In the preferred embodiment, the shower head includes a clamping seat, one side of the clamping seat is provided with a reversible clamping buckle, and the clamping buckle and the clamping seat are used to connect with the lifting rod; A water inlet pipe is provided on one side of the clamping seat, a rotating motor is provided on the top of the water inlet pipe, a rotatable rotating seat is provided below the rotating motor, and a first nozzle, a second nozzle and a third nozzle are evenly distributed on the outer circle of the rotating seat; The first nozzle, the second nozzle and the third nozzle are connected to the water inlet pipe through an inner water outlet, the inner water outlet is fan-shaped, and the inner water outlet can only be connected to one of the first nozzle, the second nozzle and the third nozzle at a time; The water outlet aperture of the first nozzle is smaller than that of the second nozzle, and the water outlet aperture of the second nozzle is smaller than that of the third nozzle; The control system controls the rotating motor to switch different nozzles according to the data sent back by the installed humidity sensors, realizes automatic spraying, ensures that the humidity of the concrete is maintained within the preset range, and prevents the concrete from cracking.

[0014] The present invention provides a method for anti-cracking construction of large-area thin-layer composite slabs, which has the following beneficial effects: the present invention significantly enhances the bonding force between floor beams and prefabricated slabs by introducing step and grouting groove design, special connecting plates and structural sealants, effectively prevents leakage and improves the overall structural strength; the pre-embedded special embedded parts not only strengthen the slab connection, but also serve as grouting channels for easy maintenance; the vibrating device ensures the compactness of the thin layer of concrete; and the intelligent spraying system automatically adjusts maintenance according to the humidity sensor data to avoid surface cracking and ensure concrete quality, thereby greatly improving construction efficiency and project quality, reducing costs and extending the life of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of floor construction of the present invention; Figure 2 It is an exploded view of the floor construction of the present invention; Figure 3 is a cross-sectional view of the floor construction of the present invention; Figure 4It is a partial view of the floor construction of the present invention; Figure 5 It is a schematic diagram of the spray range of the present invention; Figure 6 It is a schematic diagram of floor slab laying of the present invention; Figure 7 It is a bottom schematic diagram of floor slab laying of the present invention; Figure 8 It is a schematic diagram of a grouting tank of the present invention; Fig. 9 It is a schematic diagram of the movement of the vibrating device of the present invention; Fig.10 is an axonometric view of the vibrating device of the present invention; Fig.11 is a cross-sectional view of the vibrating device of the present invention; Fig.12 is a cross-sectional view of the vibrating device of the present invention in another direction; Fig.13 is an axonometric view of the spray device of the present invention; Fig.14 is an axonometric view of a shower head of the present invention; Fig.15 is a cross-sectional view of a nozzle of the present invention; Fig.16 It is a top view of the shower head of the present invention.

[0016] In the figure: floor beam 1; step 101; step base 102; grouting groove 103; corner floor 2; first embedded part 201; grouting groove 202; hook reinforcement 203; second embedded part 204; wing plate 205; middle floor 3; spray device 4; mounting base 401; lifting cylinder 402; lifting rod 403; spray head 404; inner water outlet 405; pressing buckle 406; clamping seat 407; water inlet pipe 408; Rotating seat 409; first nozzle 410; second nozzle 411; third nozzle 412; rotating motor 413; first connecting plate 5; second connecting plate 6; tensioning member 7; steel mesh 8; humidity sensor 801; vibrating device 9; motor bracket 901; flywheel cover 902; vibrating plate 903; transition plate 904; traction bracket 905; fixed truss 906; steel cable 907; flywheel 908; vibrating motor 909. DETAILED DESCRIPTION

[0017] Example 1 like Figure 1-16 As shown, a method for anti-cracking construction of a large-area thin-layer composite floor slab comprises: S1, construct the floor beam 1, reserve a step 101 on the inner side of the floor beam 1, and reserve a grouting groove 103 on the step base 102 of the step 101; S2, hoist the corner floor 2 and the middle floor 3 and lay them on the step 101, and connect them with the first connecting plate 5 and the second connecting plate 6; S3, grouting the grouting groove 103 through the corner floor 2 and the middle floor 3; S4, after grouting is completed, steel mesh 8 is laid on the corner slabs 2 and the middle slabs 3, and concrete is poured; S5, after pouring the concrete, vibrate the concrete using the vibrating device 9; S6. After the vibration is completed, multiple spray devices 4 are arranged on the floor beam 1 to cure the concrete to prevent drying and cracking; S7. Complete the construction of the composite floor slab on this floor.

[0018] In the preferred embodiment, in step S2, the corner floor 2 and the middle floor 3 are provided with a plurality of first embedded parts 201 and second embedded parts 204; The first embedded parts 201 of the corner floor 2 and the middle floor 3 are distributed along the direction of the slurry groove 103, and the second embedded parts 204 are arranged at other edge positions. The first embedded part 201 and the second embedded part 204 are cylindrical, with threads on the inner circle and multiple wing plates 205 on the outer circle, and the wing plates 205 are used to improve the bonding force between the embedded parts and the prefabricated plate. A plurality of hook bars 203 are also provided on the upward side of the corner slabs 2 and the middle slabs 3 .

[0019] In the preferred embodiment, a plurality of grouting grooves 202 are further provided on one side of the corner floor 2 and the middle floor 3, and the grouting grooves 202 are consistent in shape and width with the grouting grooves 103; The first embedded part 201 penetrates the floor slab and is connected to the grouting groove 202, and the second embedded part 204 does not penetrate the floor slab; In the preferred solution, in step S2, when hoisting the floor slab, the lifting rings are connected to the embedded parts at the four corners of the floor slab to facilitate balance during hoisting. After hoisting in place, the lifting rings are removed for the next floor slab; The joints between the corner floor 2 and the middle floor 3 need to be bonded with structural sealant and then connected with the first connecting plate 5 and the second connecting plate 6. The first connecting plate 5 is used for the connection between two floor slabs, and the second connecting plate 6 is used for the connection between four floor slabs. The first connecting plate 5 is provided with a strain sensor.

[0020] In the preferred embodiment, in step S3, the tensioning member 7 is first used to block part of the first embedded member 201, leaving two first embedded members 201 at opposite corners, wherein the first embedded member 201 at one corner is used as a grouting hole, and the first embedded member 201 at the other corner is used as a grouting hole; Grouting is performed into the grouting groove 103 through the first embedded part 201 as a grouting hole, until the grouting liquid fills the grouting groove 103 and the grouting groove 202 and overflows from the first embedded part 201 as a grouting outlet hole; After the slurry overflows, the tensioning member 7 is used to seal the grouting hole and the slurry outlet hole to complete the grouting. After the grouting is completed, leakage at the edge during concrete pouring can be prevented. The original step is used as an edge template, and pouring can be carried out directly without a template.

[0021] In the preferred embodiment, in step S4, a plurality of humidity sensors 801 are evenly distributed on the steel mesh 8, and the humidity sensors 801 are used to detect humidity changes during the concrete curing process; The poured concrete is high-strength concrete, in which basalt fibers are added to increase the strength of the concrete.

[0022] In the preferred embodiment, in step S5, the vibrating device 9 includes a vibrating motor 909, a vibrating plate 903 is provided below the vibrating motor 909, and a motor bracket 901 is provided between the vibrating motor 909 and the vibrating plate 903; The vibrating motor 909 is a double-shaft motor, with flywheels 908 provided at both ends of the motor shaft. The flywheel 908 is fan-shaped, and when the flywheel 908 rotates, the vibrating plate 903 vibrates. A flywheel cover 902 is provided on the outside of the flywheel 908 to protect the flywheel 908.

[0023] In the preferred embodiment, arc-shaped transition plates 903 are provided on both sides of the vibrating plate 903, and the transition plates 903 facilitate the sliding of the vibrating device 9 on the concrete surface; A traction bracket 905 is provided on the outside of the flywheel cover 902, and a fixed truss 906 is provided between the traction brackets 905. The fixed truss 906 is provided with steel cables 907 in four directions. The steel cables 907 are connected to a movable small winch on the floor beam 1. The small winch is used to control the vibrating device 9 to move on the concrete surface.

[0024] In the preferred embodiment, in step S6, the spray device 4 includes a mounting base 401, a lifting electric cylinder 402 is provided on the mounting base 401, and a detachable spray head 404 is provided on a lifting rod 403 of the lifting electric cylinder 402; The best layout position of the spray device 4 is the central symmetrical layout.

[0025] In the preferred embodiment, the shower head 404 includes a clamping seat 407, and a reversible clamping buckle 406 is provided on one side of the clamping seat 407. The clamping buckle 406 and the clamping seat 407 are used to connect with the lifting rod 403; A water inlet pipe 408 is provided on one side of the clamping seat 407, a rotating motor 413 is provided on the top of the water inlet pipe 408, a rotatable rotating seat 409 is provided below the rotating motor 413, and a first nozzle 410, a second nozzle 411 and a third nozzle 412 are evenly distributed on the outer circle of the rotating seat 409; The first nozzle 410, the second nozzle 411 and the third nozzle 412 are connected to the water inlet pipe 408 through the inner water outlet 405. The inner water outlet 405 is fan-shaped and can only be connected to one of the first nozzle 410, the second nozzle 411 and the third nozzle 412 at a time. The water outlet aperture of the first nozzle 410 is smaller than that of the second nozzle 411, and the water outlet aperture of the second nozzle 411 is smaller than that of the third nozzle 412; The control system controls the rotating motor 413 to switch different nozzles according to the data sent back by the humidity sensor 801, so as to realize automatic spraying, ensure that the humidity of the concrete is kept within the preset range, and prevent the concrete from cracking. The detailed method of a large-area thin-layer composite floor anti-cracking construction method is as follows: Step S1: Floor beam construction When constructing a large area of ​​thin-layer composite floor, the first thing to do is to construct the floor beam 1. A step 101 is reserved inside the floor beam 1, and a grouting groove 103 is reserved on the step base 102. This design not only helps to enhance the bonding force between the prefabricated floor and the beam, but also provides the necessary structural support for the subsequent grouting operation. The design of the step 101 should ensure that its size and position are accurate, so as to facilitate the accurate laying of the corner floor 2 and the middle floor 3 in the subsequent steps.

[0026] Step S2: Hoisting corner slabs and middle slabs Next, the corner slab 2 and the middle slab 3 are hoisted and laid on the reserved steps 101. In order to ensure the balance during the hoisting process, embedded parts (first embedded parts 201 and second embedded parts 204) are provided at the four corners of the slab, and the lifting rings are connected to these embedded parts, so that the lifting rings can be removed after the hoisting is completed for the hoisting of the next slab. The joints between the corner slab 2 and the middle slab 3 are bonded with structural sealant, and the first connecting plate 5 and the second connecting plate 6 are used for reinforcement connection. Among them, the first connecting plate 5 is used for the connection between the two slabs, and the second connecting plate 6 is used for the connection of the intersection of the four slabs to ensure the integrity and stability of the entire floor. In particular, the first connecting plate 5 is integrated with a strain sensor, which can monitor the stress changes in the connection parts in real time.

[0027] Step S3: Grouting operation After the floor slab is laid, the next crucial step is grouting. Through the pre-set first embedded parts 201, the tensioning member 7 is partially blocked, leaving only two on the diagonal as grouting holes and grouting holes. Slurry is injected into the grouting groove 103 through one of the first embedded parts 201 serving as the grouting hole until the slurry overflows from the other first embedded part 201 serving as the grouting hole. This process ensures that the slurry can fully fill the gap between the grouting groove 103 and the grouting groove 202, thereby enhancing the close bonding between the floor slab and the crossbeam. After the grouting is completed, the grouting holes and the grouting holes are blocked again with the tensioning member 7 to prevent leakage when pouring concrete. Since the edge has been used as a template by the original step, the next step of concrete pouring can be carried out directly without the need to set up an additional template, thereby simplifying the construction process.

[0028] Step S4: Laying of steel mesh and pouring of concrete After the grouting is completed, a steel mesh 8 with a humidity sensor 801 is evenly laid on the floor surface. The humidity sensor 801 can detect the change of humidity in real time during the concrete curing process and provide data support for the subsequent intelligent spraying system. The concrete used is high-strength concrete, and basalt fiber is added to improve its compressive strength and durability. After laying the steel mesh 8, the concrete pouring operation is immediately carried out to ensure that the concrete can completely cover the steel mesh 8 and form an integral structure with the bottom floor.

[0029] Step S5: Application of vibrating device In order to ensure that the concrete is vibrated and compacted, a special vibrating device 9 is used in this step. The device mainly includes a vibrating motor 909, a vibrating plate 903 and its supporting structure (motor bracket 901). The vibrating motor 909 adopts a double-shaft design, and fan-shaped flywheels 908 are installed at both ends. When the motor drives the flywheel to rotate, it will drive the vibrating plate 903 to vibrate, thereby achieving effective vibration of the concrete. Arc-shaped transition plates 903 are provided on both sides of the vibrating plate 903, so that the vibrating device can slide smoothly on the concrete surface. In addition, a traction bracket 905 and a fixed truss 906 are set on the outside of the flywheel cover 902, which are connected to the small winch on the floor beam 1 through a steel cable 907, realizing the automatic walking control of the vibrating device on the concrete surface, ensuring uniform and efficient vibration.

[0030] Step S6: Intelligent spray maintenance The last step is to cure the newly poured concrete to prevent cracking caused by drying. To this end, multiple spray devices 4 are arranged on the floor beam 1. Each spray device 4 includes a mounting base 401, a lifting cylinder 402, and a detachable spray head 404. A clamping seat 407 and a clamping buckle 406 are provided inside the spray head 404 to facilitate connection with the jacking rod 403; at the same time, a rotating motor 413 is installed on the top of the water inlet pipe 408, and a rotatable rotating seat 409 is connected below, and the outer circle of the rotating seat is evenly distributed with the first spray head 410, the second spray head 411 and the third spray head 412 of different apertures. The control system automatically adjusts the position of the rotating motor 413 according to the data fed back by the humidity sensor 801, selects the appropriate spray head for spraying, ensures that the concrete is always kept within the appropriate humidity range, and promotes its good hardening.

[0031] like Figure 5 As shown, according to the different humidity in different locations, the appropriate spray angle and nozzle size can be automatically selected to keep the concrete within an appropriate humidity range.

[0032] Step S7: Construction is completed After completing all the above steps, the construction of this layer of composite floor slab is officially completed. Through this series of careful design and application of technical means, not only the construction efficiency is improved, but also the engineering quality is significantly improved, laying a solid foundation for the smooth progress of the construction project.

[0033] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A method for anti-cracking construction of large-area thin-layer composite floor slabs, characterized by: The method includes: S1, constructing a floor beam (1), reserving a step (101) on the inner side of the floor beam (1), and reserving a grouting groove (103) on the step base (102) of the step (101); S2, hoisting the corner floor slab (2) and the middle floor slab (3) onto the steps (101), and connecting them using a first connecting plate (5) and a second connecting plate (6); S3, grouting the grouting groove (103) through the corner floor slab (2) and the middle floor slab (3); S4, after the grouting is completed, a steel mesh (8) is laid on the corner slabs (2) and the middle slabs (3), and concrete is poured; S5, after pouring the concrete, vibrate the concrete using a vibrating device (9); S6. After the vibration is completed, multiple spray devices (4) are arranged on the floor beam (1) to cure the concrete to prevent it from drying and cracking; S7. Complete the construction of the composite floor slab on this floor.

2. A method for anti-cracking construction of large-area thin-layer composite floor slabs according to claim 1, characterized in that: In step S2, the corner floor slab (2) and the middle floor slab (3) are provided with a plurality of first embedded parts (201) and second embedded parts (204); The first embedded parts (201) of the corner floor slabs (2) and the middle floor slabs (3) are distributed along the direction of the slurry pocket grooves (103), and the second embedded parts (204) are arranged at other edge positions; The first embedded part (201) and the second embedded part (204) are cylindrical, with threads provided on the inner circle and a plurality of wing plates (205) provided on the outer circle, wherein the wing plates (205) are used to improve the bonding force between the embedded part and the prefabricated plate; A plurality of hook bars (203) are also provided on the upward side of the corner floor slab (2) and the middle floor slab (3).

3. A method for anti-cracking construction of large-area thin-layer composite floor slabs according to claim 2, characterized in that: A plurality of grouting grooves (202) are also provided on one side of the corner floor slab (2) and the middle floor slab (3), and the grouting grooves (202) are consistent in shape and width with the grouting grooves (103); The first embedded part (201) penetrates the floor slab and is connected to the grouting groove (202), and the second embedded part (204) does not penetrate the floor slab.

4. A method for anti-cracking construction of large-area thin-layer composite floor slabs according to claim 3, characterized in that: In step S2, when hoisting the floor slab, the lifting rings are connected to the embedded parts at the four corners of the floor slab to facilitate the balance during hoisting. After hoisting in place, the lifting rings are removed for the next floor slab; The joints between the corner floor slab (2) and the middle floor slab (3) need to be bonded with structural sealant and then connected using a first connecting plate (5) and a second connecting plate (6). The first connecting plate (5) is used for the connection between two floor slabs, and the second connecting plate (6) is used for the connection between four floor slabs. A strain sensor is provided in the first connecting plate (5).

5. A method for anti-cracking construction of large-area thin-layer composite floor slabs according to claim 4, characterized in that: In step S3, a tensioning member (7) is first used to block part of the first embedded member (201), leaving two first embedded members (201) at opposite corners, wherein the first embedded member (201) at one corner is used as a grouting hole, and the first embedded member (201) at the other corner is used as a grouting hole; Grouting is performed into the grouting groove (103) through the first embedded part (201) serving as a grouting hole, until the grouting liquid fills the grouting groove (103) and the grouting groove (202) and overflows from the first embedded part (201) serving as a grouting outlet; After the slurry overflows, the grouting hole and the slurry outlet hole are sealed using a tensioning member (7) to complete the grouting.

6. The anti-cracking construction method of a large-area thin-layer composite floor according to claim 1 is characterized by: In step S4, a plurality of humidity sensors (801) are evenly distributed on the steel mesh (8), and the humidity sensors (801) are used to detect humidity changes during the concrete curing process; The poured concrete is high-strength concrete, in which basalt fibers are added to increase the strength of the concrete.

7. The anti-cracking construction method of a large-area thin-layer composite floor according to claim 1 is characterized by: In step S5, the vibrating device (9) comprises a vibrating motor (909), a vibrating plate (903) is provided below the vibrating motor (909), and a motor bracket (901) is provided between the vibrating motor (909) and the vibrating plate (903); The vibrating motor (909) is a double-shaft motor. Flywheels (908) are provided at both ends of the motor shaft. The flywheel (908) is fan-shaped. When the flywheel (908) rotates, the vibrating plate (903) vibrates. A flywheel cover (902) is provided outside the flywheel (908). The flywheel cover (902) is used to protect the flywheel (908).

8. The anti-cracking construction method of a large-area thin-layer composite floor according to claim 6 is characterized by: Arc-shaped transition plates (903) are provided on both sides of the vibrating plate (903), and the transition plates (903) facilitate the vibrating device (9) to slide on the concrete surface; A traction bracket (905) is provided on the outer side of the flywheel cover (902), a fixed truss (906) is provided between the traction brackets (905), and steel cables (907) are provided in four directions on the fixed truss (906). The steel cables (907) are connected to a movable small winch on the floor beam (1), and the small winch is used to control the vibrating device (9) to move on the concrete surface.

9. The anti-cracking construction method of a large-area thin-layer composite floor according to claim 1 is characterized by: In step S6, the spray device (4) comprises a mounting base (401), a lifting electric cylinder (402) is provided on the mounting base (401), and a detachable spray head (404) is provided on a lifting rod (403) of the lifting electric cylinder (402); The best layout position of the spray device (4) is centrally symmetrical layout.

10. A method for anti-cracking construction of large-area thin-layer composite floor slabs according to claim 9, characterized in that: The shower head (404) comprises a clamping seat (407), one side of the clamping seat (407) is provided with a reversible clamping buckle (406), and the clamping buckle (406) and the clamping seat (407) are used to be connected to the lifting rod (403); A water inlet pipe (408) is provided on one side of the clamping seat (407), a rotating motor (413) is provided on the top of the water inlet pipe (408), a rotatable rotating seat (409) is provided below the rotating motor (413), and a first nozzle (410), a second nozzle (411), and a third nozzle (412) are evenly distributed on the outer circle of the rotating seat (409); The first nozzle (410), the second nozzle (411) and the third nozzle (412) are connected to the water inlet pipe (408) via an internal water outlet (405); the internal water outlet (405) is fan-shaped, and the internal water outlet (405) can only be connected to one of the first nozzle (410), the second nozzle (411) and the third nozzle (412) at a time; The water outlet aperture of the first nozzle (410) is smaller than that of the second nozzle (411), and the water outlet aperture of the second nozzle (411) is smaller than that of the third nozzle (412); The control system controls the rotating motor (413) to switch different nozzles according to the data sent back by the arranged humidity sensor (801), thereby realizing automatic spraying, ensuring that the humidity of the concrete is maintained within a preset range, and preventing the concrete from cracking.

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