Construction method and device for secondary pouring forming of concrete square box hollow floor

Abstract

The invention relates to the technical field of concrete pouring, and discloses a construction method and device for secondary pouring forming of a concrete square box hollow floor, and the construction method for secondary pouring forming of the concrete square box hollow floor comprises the following steps: S1, primary pouring; s2, first-layer initial setting; s3, the steel pipes and the formworks are dismantled; s4, arranging a square box; s5, pouring for the second time; by means of the two-time pouring mode, it is guaranteed that the thickness and density of concrete at all parts meet the design requirements, the overall construction quality and reliability are improved, the concrete is vibrated after each time of pouring is completed, bubbles and cavities are reduced, and the first layer of concrete has certain strength before the square box is arranged; and after the square box is arranged, steel bars are bound at the top of the square box, the square box can be effectively prevented from floating or sinking due to infirm fixation, and the structural safety of the hollow floor system is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of concrete pouring, in particular to a construction method and a device for secondary pouring and molding of a concrete square box hollow floor slab. Background Art

[0002] Concrete square box hollow floor is a new type of floor structure system. Its main feature is that a certain number of prefabricated permanent thin-walled boxes are arranged according to rules in the cast-in-place concrete floor to form a hollow floor.

[0003] The existing technology of concrete square box hollow floor slabs often adopts a one-time casting construction method. The square box often floats up or sinks due to loose fixation, resulting in insufficient concrete thickness of the bottom plate and top plate, affecting the structural safety. In addition, the incomplete pouring of concrete at the bottom of the plate will cause quality defects such as honeycomb and rough surface.

[0004] To this end, the present invention provides a construction method and device for secondary casting and forming of a concrete square box hollow floor slab. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The present invention provides a construction method for secondary casting of a concrete square box hollow floor slab, comprising the following steps: S1: First pouring: After the bottom plate reinforcement is tied, the first layer is poured to the bottom plate, and the rib beam and frame beam area are poured to the bottom of the top plate. After pouring, the concrete is vibrated; S2: Initial setting of the first layer of concrete: Wait for the initial setting of the first layer of concrete and test the concrete strength to ensure that it reaches more than 70%; S3: Removal of steel pipes and formwork: Remove the bottom formwork and steel pipe support, and roughen the concrete surface of the rib beams and frame beams; S4: Set up the box: correctly place the box and tie the steel bars on the top of the box; S5: Second pouring: pouring height to the top plate position, and vibrating the concrete again after pouring is completed.

[0007] By adopting the above technical scheme, through two pouring methods, it is ensured that the thickness and density of concrete in various parts meet the design requirements, thereby improving the overall construction quality and reliability. The concrete is vibrated after each pouring to reduce the generation of bubbles and voids. The first layer of concrete has a certain strength before setting the square box, and after the square box is set, the steel bars are tied on the top of the square box, which can effectively prevent the square box from floating up or sinking due to loose fixation, thereby ensuring the structural safety of the hollow floor.

[0008] On the other hand, the present application also provides a construction device for secondary casting and forming of concrete square box hollow floor slabs, including a vehicle body, movable components are provided on both sides of the vehicle body, a first casting component is provided on the top of the vehicle body, and a second casting component is connected to the bottom of the first casting component. The movable component drives the vehicle body to move on the steel bars on the top of the square box. The first casting component is externally connected to a concrete barrel, and concrete is discharged from the first casting component through the second casting component to cast the hollow floor slab.

[0009] Preferably, the first casting assembly includes a bellows, a fixing ring is installed on the outer side of the bottom of the bellows, the bottom of the inner side of the fixing ring is fixedly connected to a first flow box, the bottom of the first flow box is fixedly connected to a connecting pipe, the upper opening of the first flow box is open, and the bottom of the first flow box is provided with an arc hole that matches the tolerance of the outer side of the connecting pipe.

[0010] Preferably, the second casting assembly includes a second flow box, which is a hollow structure, with an arc-shaped through hole on the top, a cross hole at the center of the bottom of the second flow box, and a cross outlet fixedly connected to the center of the bottom of the second flow box.

[0011] Preferably, a first control component is provided on the inner side of the second casting component, a second control component is provided on the top of the first control component, and a driving component is provided on the side of the second control component away from the connecting pipe. The driving component drives the moving component and the first control component to move, driving the vehicle body to move on the steel bars on the top of the square box while controlling the discharge frequency of the second casting component.

[0012] By adopting the above technical solution, the discharge amount of the second pouring component between the gaps of the square boxes is controlled, a certain amount of time is left to wait for the concrete to be leveled, and pouring concrete in small amounts and multiple times makes the concrete easier to vibrate and compact. The small amount of concrete poured in a single time can reduce the load on the formwork and supporting structure.

[0013] Preferably, the moving assembly includes moving wheels, a first rotating shaft is fixedly connected to a side between the two moving wheels close to the driving assembly, and a first bevel gear is fixedly connected to an outer side of the first rotating shaft.

[0014] Preferably, the drive assembly includes a drive motor, the drive motor output shaft is fixedly connected to a second rotating shaft, the top of the outer side of the second rotating shaft is fixedly connected to a first gear, the bottom of the second rotating shaft is fixedly connected to a second bevel gear, the second bevel gear is meshed with the first bevel gear, and the second rotating shaft is rotatably connected to the inside of the vehicle body.

[0015] Preferably, the second control component includes a disk, one side of the top of the disk is fixedly connected to a moon-shaped protrusion, the other side of the top of the disk is fixedly connected to a driving column, the center of the disk is fixedly connected to a central axis, the top of the central axis of the disk is fixedly connected to a second gear, the teeth on the outer side of the second gear are meshed with the teeth on the outer side of the first gear, and a protective outer box is provided on the outer side of the second gear.

[0016] Preferably, the first control component includes a third rotating shaft, a circular hole that is gap-matched with the third rotating shaft is opened on the top of the second circulation box, a cross stopper is fixedly connected to the bottom of the third rotating shaft, and the top of the cross stopper is at the same height as the bottom of the cross discharge port, so a square disk is fixedly connected to the top of the third rotating shaft, and through grooves are opened at the four corners of the square disk, and the four sides of the square disk are meshed with the side of the moon-shaped protrusion away from the center of the disk, and the through grooves are meshed with the driving column.

[0017] Preferably, the first control component further comprises a stirring blade, an end of the stirring blade away from the third rotating shaft is in contact with the inner side of the second circulation box, and a height of the stirring blade is in clearance with a height of the inner side of the second circulation box.

[0018] By adopting the above technical solution, the stirring blade can scrape the inner wall of the second circulation box when rotating, so as to avoid concrete adhering to the inner wall of the second circulation box and causing waste.

[0019] The beneficial effects of the present invention are as follows: the construction method and device for secondary casting of concrete square box hollow floor slabs of the present invention ensure that the thickness and density of concrete at various parts meet the design requirements through two casting methods, thereby improving the overall construction quality and reliability; the concrete is vibrated after each casting is completed to reduce the generation of bubbles and voids; the first layer of concrete has a certain strength before the square box is set; and after the square box is set, steel bars are tied on the top of the square box, which can effectively prevent the square box from floating up or sinking due to loose fixation, thereby ensuring the structural safety of the hollow floor slab.

[0020] The construction method and device for secondary casting of concrete square box hollow floor slabs described in the present invention, by setting a first control component and a second control component, the driving component drives the moving component and the first control component to move, drives the vehicle body to move on the steel bars on the top of the square box while controlling the discharge frequency of the second casting component, each time when it moves to the vicinity of the center of each group of square boxes, the cross block rotates to cast the gap between the square boxes, and the cycle is repeated until the target casting amount is reached.

[0021] The construction method and device for secondary casting of concrete square box hollow floor slabs described in the present invention are provided with a moving component and a first casting component. The moving component drives the vehicle body to move on the steel bars on the top of the square box. The first casting component is externally connected to a concrete barrel. Concrete is discharged from the first casting component through the second casting component to cast the hollow floor slab. The corrugated pipe will extend or shorten according to the distance between the device and the concrete barrel as the device moves to adapt to the change in the position of the device.

[0022] The construction method and device for secondary casting of concrete square box hollow floor slabs described in the present invention provide stirring blades, which rotate synchronously with the third rotating shaft. The stirring blades can stir the concrete during rotation, so that the moisture is evenly distributed in the concrete, thereby improving the fluidity, plasticity and flexibility of the concrete. The end of the stirring blade away from the third rotating shaft is in contact with the inner side of the second circulation box. The stirring blades can scrape the inner wall of the second circulation box when rotating, so as to avoid waste caused by adhesion of concrete to the inner wall of the second circulation box. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a flow chart of the construction method in the present invention; Figure 2 It is a front perspective view of the overall structure of the present invention; Figure 3 It is a bottom-up stereogram of the overall structure of the present invention; Figure 4 It is a cross-sectional view of the overall structure of the present invention; Figure 5 It is a structural schematic diagram of the first control component and the drive component in the present invention; Figure 6 It is a schematic cross-sectional view of the structure of the first control component, the second control component and the drive component in the present invention; Figure 7 It is a schematic diagram of the structural cross-section of the second casting assembly in the present invention.

[0024] Description of reference numerals: 1. Car body; 2. Moving assembly; 201. Moving wheel; 202. First rotating shaft; 203. First bevel gear; 3. First casting assembly; 301. Bellows; 302. First circulation box; 303. Connecting pipe; 304. Fixed ring; 4. Driving assembly; 401. Driving motor; 402. Second rotating shaft; 403. First gear; 404. Second bevel gear; 5. First control assembly; 501. Square plate; 502. Through groove; 503. Stirring blade; 504. Third rotating shaft; 505. Cross block; 6. Second control assembly; 601. Disc; 602. Moon-shaped protrusion; 603. Driving column; 604. Second gear; 605. Protective outer box; 7. Second casting assembly; 701. Second circulation box; 702. Arc through hole; 703. Cross hole; 704. Cross outlet. DETAILED DESCRIPTION

[0025] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples. Example

[0026] The following is a further detailed description of the technical solution of the present invention in conjunction with the accompanying drawings and specific embodiments. Figures 1 to 7 The construction method for secondary casting of concrete square box hollow floor slab provided in this application is particularly referred to Figure 1 , including the following steps: S1: First pouring: After the bottom plate reinforcement is tied, the first layer is poured to the bottom plate, and the rib beam and frame beam area are poured to the bottom of the top plate. After pouring, the concrete is vibrated; S2: Initial setting of the first layer of concrete: Wait for the initial setting of the first layer of concrete and test the concrete strength to ensure that it reaches more than 70%; S3: Removal of steel pipes and formwork: Remove the bottom formwork and steel pipe support, and roughen the concrete surface of the rib beams and frame beams; S4: Set up the box: correctly place the box and tie the steel bars on the top of the box; S5: Second pouring: pouring height to the top plate position, and vibrating the concrete again after pouring is completed.

[0027] Specifically, through two pouring methods, the thickness and density of concrete in various parts are ensured to meet the design requirements, which improves the overall construction quality and reliability. The concrete is vibrated after each pouring to reduce the generation of bubbles and voids. The first layer of concrete has a certain strength before setting the square box, and after the square box is set, the steel bars are tied on the top of the square box, which can effectively prevent the square box from floating up or sinking due to loose fixation, thereby ensuring the structural safety of the hollow floor.

[0028] On the other hand, the present application also provides a construction device for secondary casting of a concrete square box hollow floor slab according to the above, please refer to Figure 2 , Figure 4 , including a vehicle body 1, both sides of the vehicle body 1 are provided with moving components 2, the top of the vehicle body 1 is provided with a first pouring component 3, the bottom of the first pouring component 3 is connected to the second pouring component 7, the moving component 2 drives the vehicle body 1 to move on the steel bars on the top of the square box, the first pouring component 3 is externally connected to a concrete barrel, and the concrete is discharged from the first pouring component 3 through the second pouring component 7 to pour the hollow floor slab.

[0029] Specifically, the existing pouring method is usually that the operator holds a pouring hose to pour the inner side around the built outer frame, but this pouring method is more labor-intensive. When this device is used for pouring, during the second pouring, the device is controlled to move on the steel bars on the top of the square box to perform the pouring operation. There is no need to manually drag the hose to pour one by one, which improves construction efficiency.

[0030] Please refer to Figure 2 , Figure 4 The first casting assembly 3 includes a bellows 301, a fixing ring 304 is installed on the outer side of the bottom of the bellows 301, a first flow box 302 is fixedly connected to the bottom of the inner side of the fixing ring 304, a connecting pipe 303 is fixedly connected to the bottom of the first flow box 302, the upper opening of the first flow box 302 is open, and an arc hole matching the tolerance of the outer side of the connecting pipe 303 is opened at the bottom of the first flow box 302, and the bellows 301, the first flow box 302, and the connecting pipe 303 are connected to each other.

[0031] Specifically, the bellows 301 will extend or shorten as the device moves, depending on the distance between the device and the concrete barrel, to adapt to changes in the position of the device.

[0032] Please refer to Figure 4 , Figure 7 The second casting assembly 7 includes a second flow box 701. The second flow box 701 is a hollow structure. An arc-shaped through hole 702 is opened on the top of the second flow box 701. A cross hole 703 is opened in the center of the bottom of the second flow box 701. A cross outlet 704 is fixedly connected to the center of the bottom of the second flow box 701.

[0033] Specifically, the arc-shaped through hole 702, the connecting pipe 303, and the arc-shaped hole of the first flow box 302 are all matched with tolerances. The connecting pipe 303 connects the first flow box 302 and the second flow box 701. Concrete enters the first flow box 302 from the corrugated pipe 301, then falls from the first flow box 302 to the connecting pipe 303, and then is discharged into the second flow box 701 through the connecting pipe 303, and finally is discharged through the cross hole 703 and the cross outlet 704 for pouring. The inner size and shape of the cross hole 703 are matched with the inner size and shape of the cross outlet 704. The cross hole 703 and the cross outlet 704 are both cross-shaped, which is convenient for pouring directly into the gap between the two boxes during the second pouring, thereby improving the pouring efficiency.

[0034] Please refer to Figure 3 , Figure 4 A first control component 5 is arranged on the inner side of the second pouring component 7, a second control component 6 is arranged on the top of the first control component 5, a driving component 4 is arranged on the side of the second control component 6 away from the connecting pipe 303, and the driving component 4 drives the moving component 2 and the first control component 5 to move, driving the vehicle body 1 to move on the steel bars on the top of the square box while controlling the discharge frequency of the second pouring component 7.

[0035] Specifically, the discharge amount of the second pouring component 7 between the square boxes is controlled, and a certain amount of time is left for the concrete to be leveled. Pouring concrete in small amounts multiple times makes the concrete easier to vibrate and compact, and a small amount of concrete poured in a single time can reduce the load on the formwork and the supporting structure.

[0036] Please refer to Figure 4 The moving assembly 2 includes a moving wheel 201 , a first rotating shaft 202 is fixedly connected to one side between the two moving wheels 201 close to the driving assembly 4 , and a first bevel gear 203 is fixedly connected to the outer side of the first rotating shaft 202 .

[0037] Specifically, the moving wheel 201 is a crawler wheel, which is convenient for walking on the surface of steel bars.

[0038] Please refer to Figure 4 , Figure 5 The driving assembly 4 includes a driving motor 401, the output shaft of the driving motor 401 is fixedly connected to the second rotating shaft 402, the top of the outer side of the second rotating shaft 402 is fixedly connected to the first gear 403, the bottom of the second rotating shaft 402 is fixedly connected to the second bevel gear 404, the second bevel gear 404 is meshed with the first bevel gear 203, and the second rotating shaft 402 is rotatably connected to the inside of the vehicle body 1.

[0039] Specifically, the drive motor 401 is started, and the output shaft of the drive motor 401 drives the second rotating shaft 402 to rotate, and the second rotating shaft 402 drives the first gear 403 and the second bevel gear 404 to rotate synchronously. The second bevel gear 404 is meshed with the first bevel gear 203, so when the second bevel gear 404 rotates, it will drive the moving wheel 201 to rotate together, that is, the moving wheel 201 starts to move and drives this device to move on the surface of the steel bar.

[0040] Please refer to Figure 6 The second control component 6 includes a disk 601, a moon-shaped protrusion 602 is fixedly connected to one side of the top of the disk 601, a driving column 603 is fixedly connected to the other side of the top of the disk 601, the center of the disk 601 is fixedly connected to the central axis, the top of the central axis of the disk 601 is fixedly connected to the second gear 604, the outer teeth of the second gear 604 are meshed with the outer teeth of the first gear 403, and a protective outer box 605 is arranged on the outer side of the second gear 604.

[0041] Specifically, since the first gear 403 and the second gear 604 are meshed with each other, the rotation of the first gear 403 will drive the second gear 604 to rotate, but since the number of teeth of the first gear 403 is much smaller than the number of teeth of the second gear 604, the first gear 403 needs to rotate multiple times for the second gear 604 to rotate exactly one circle, wherein the first gear 403, the first bevel gear 203 and the second bevel gear 404 have the same number of teeth, and when the first gear 403 rotates one circle, the second gear 604, the first bevel gear 203 and the second bevel gear 404 all rotate one circle, and the bottom of the central axis of the disk 601 is rotatably connected to the top of the vehicle body 1, and the second gear 604 can drive the disk 601 to rotate.

[0042] Please refer to Figure 4 , Figure 5 , Figure 6 The first control component 5 includes a third rotating shaft 504, a round hole with a clearance fit with the third rotating shaft 504 is opened on the top of the second circulation box 701, a cross block 505 is fixedly connected to the bottom of the third rotating shaft 504, the top of the cross block 505 and the bottom of the cross discharge port 704 are at the same height, so the top of the third rotating shaft 504 is fixedly connected to the square plate 501, the four corners of the square plate 501 are opened with through grooves 502, the four sides of the square plate 501 are meshed with the side of the moon-shaped protrusion 602 away from the center of the disc 601, and the through grooves 502 are meshed with the driving column 603.

[0043] Specifically, since the square boxes are arranged with a fixed gap, each four adjacent square boxes form a group, and the cross discharge port 704 is located around the center of each group of square boxes for pouring, when the first bevel gear 203 rotates to drive the moving wheel 201 to move forward a distance so that the device moves from the center of the current group of square boxes to the center of the next group of square boxes, the second gear 604 rotates exactly one full circle, and the rotation of the second gear 604 will drive the disc 601 to rotate synchronously. During the rotation of the disc 601, when the driving column 603 is about to rotate to 360 degrees, it will pass through the through slot 502 close to one side of the center of the disc 601. The driving column 603 will move to the inside of the through slot 502 here to toggle the four-corner disc 501 to rotate 90 degrees, that is, when the disc 601 rotates, the driving column 603 will move to the inside of the through slot 502 to toggle the four-corner disc 501 to rotate 90 degrees. When the disc 601 rotates exactly one circle, it will drive the square disc 501 to rotate directly by ninety degrees. When the square disc 501 rotates, it will drive the third rotating shaft 504 to rotate synchronously, thereby driving the cross block 505 to rotate by ninety degrees. During the rotation, concrete is discharged from the cross outlet 704 for pouring. After the rotation is completed, the cross block 505 closes the bottom of the cross outlet 704 again, that is, every time it moves exactly around the center of each group of square boxes, the cross block 505 rotates to pour the square box gap, and the cycle is repeated until the target pouring amount is reached; the second gear 604, the disc 601, the square disc 501 and the first gear 403 are all located on the inner side of the protective outer box 605, such as Figure 4 As shown, the protective outer box 605 protects the second gear 604, the disc 601, the square disc 501 and the first gear 403, the bottom of the protective outer box 605 is fixedly connected to the top of the vehicle body 1, and the second rotating shaft 402 is rotatably connected to the top of the protective outer box 605.

[0044] Please refer to Figure 4 , Figure 6 The first control component 5 also includes a stirring blade 503, and one end of the stirring blade 503 away from the third rotating shaft 504 is in contact with the inner side of the second circulation box 701, and the height of the stirring blade 503 is in clearance with the height of the inner side of the second circulation box 701.

[0045] Specifically, when the quadrangular disk 501 rotates, the third rotating shaft 504 will be driven to rotate synchronously, and the stirring blade 503 will rotate synchronously with the third rotating shaft 504. The concrete can be stirred during rotation to evenly distribute the water in the concrete, thereby improving the fluidity, plasticity and flexibility of the concrete. The end of the stirring blade 503 away from the third rotating shaft 504 is in contact with the inner side of the second circulation box 701. The stirring blade 503 can scrape the inner wall of the second circulation box 701 when rotating to avoid the concrete sticking to the inner wall of the second circulation box 701 and causing waste.

[0046] Working principle: The driving component 4 drives the moving component 2 and the first control component 5 to move, drives the vehicle body 1 to move on the steel bars on the top of the square box, and controls the discharge frequency of the second pouring component 7, leaving a certain time to wait for the concrete to be leveled. Pouring concrete in small amounts and multiple times makes the concrete easier to vibrate and compact, and a small amount of concrete pouring at a single time can reduce the load on the formwork and supporting structure.

[0047] During the move: The drive motor 401 is started, and the output shaft of the drive motor 401 drives the second rotating shaft 402 to rotate. The second rotating shaft 402 drives the first gear 403 and the second bevel gear 404 to rotate synchronously. The second bevel gear 404 is meshed with the first bevel gear 203. Therefore, when the second bevel gear 404 rotates, it drives the moving wheel 201 to rotate together, that is, the moving wheel 201 starts to move and drives the device to move on the surface of the steel bar. When the device is installed, the corrugated pipe 301 is extended or shortened according to the distance between the device and the concrete barrel to adapt to the change of the device position. At the same time, the first gear 4 03 and the second gear 604 are also meshed with each other, so when the first gear 403 rotates, it will drive the second gear 604 to rotate. However, since the number of teeth on the first gear 403 is much smaller than that on the second gear 604, the first gear 403 needs to rotate multiple times before the second gear 604 rotates one circle. Among them, the first gear 403, the first bevel gear 203 and the second bevel gear 404 have the same number of teeth. When the first gear 403 rotates one circle, the first bevel gear 203 and the second bevel gear 404 both rotate one circle. Since the square box is set with a fixed gap, every four adjacent square boxes are a group, and the cross outlet 704 The casting is carried out around the center of each group of square boxes. When the first bevel gear 203 rotates to drive the moving wheel 201 to move forward so that the device moves from the center of the current group of square boxes to the center of the next group of square boxes, the second gear 604 rotates exactly one full circle. The rotation of the second gear 604 will drive the disc 601 to rotate synchronously. During the rotation of the disc 601, when the driving column 603 rotates almost to 360 degrees, it will pass through the through slot 502 close to the side of the center of the disc 601. The driving column 603 will move to the inside of the through slot 502 here to turn the four-corner disc 501 to rotate 90 degrees. That is, when the disc 601 rotates exactly one full circle, the driving column 603 will pass through the through slot 502 close to the side of the center of the disc 601. When the square plate 501 rotates, it will drive the square plate 501 to rotate ninety degrees directly. When the square plate 501 rotates, it will drive the third rotating shaft 504 to rotate synchronously, thereby driving the cross block 505 to rotate ninety degrees. During the rotation, concrete is discharged from the cross outlet 704 for pouring, and the stirring blade 503 also rotates synchronously to scrape the inner wall of the second circulation box 701. After the rotation is completed, the cross block 505 closes the bottom of the cross outlet 704 again, that is, every time it moves to the center of each group of square boxes, the cross block 505 rotates to pour the gap between the square boxes, and the cycle is repeated until the target pouring amount is reached.

[0048] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. A construction method for secondary casting of a concrete square box hollow floor, characterized in that: The following steps are involved: S1: First pouring: After the bottom plate reinforcement is tied, the first layer is poured to the bottom plate, and the rib beam and frame beam area are poured to the bottom of the top plate. After pouring, the concrete is vibrated; S2: Initial setting of the first layer of concrete: Wait for the initial setting of the first layer of concrete and test the concrete strength to ensure that it reaches more than 70%; S3: Removal of steel pipes and formwork: Remove the bottom formwork and steel pipe support, and roughen the concrete surface of the rib beams and frame beams; S4: Set up the box: correctly place the box and tie the steel bars on the top of the box; S5: Second pouring: pouring height to the top plate position, and vibrating the concrete again after pouring is completed.

2. A construction device for secondary casting of a concrete box hollow floor slab, according to the construction method for secondary casting of a concrete box hollow floor slab according to claim 1, characterized in that: The invention comprises a vehicle body (1), wherein both sides of the vehicle body (1) are provided with moving assemblies (2), the top of the vehicle body (1) is provided with a first pouring assembly (3), the bottom of the first pouring assembly (3) is connected to a second pouring assembly (7), the moving assembly (2) drives the vehicle body (1) to move on the steel bars at the top of the square box, the first pouring assembly (3) is externally connected to a concrete barrel, and concrete is discharged from the first pouring assembly (3) through the second pouring assembly (7) to pour the hollow floor slab.

3. The construction device for secondary casting of concrete square box hollow floor slab according to claim 2 is characterized in that: The first casting assembly (3) comprises a bellows (301), a fixing ring (304) is installed on the outer side of the bottom of the bellows (301), a first flow box (302) is fixedly connected to the bottom inside the fixing ring (304), a connecting pipe (303) is fixedly connected to the bottom of the first flow box (302), the upper opening of the first flow box (302) is open, and an arc-shaped hole matching the tolerance of the outer side of the connecting pipe (303) is provided on the bottom of the first flow box (302).

4. The construction device for secondary casting of concrete square box hollow floor slab according to claim 3 is characterized in that: The second casting assembly (7) comprises a second circulation box (701), the second circulation box (701) being a hollow structure, an arc-shaped through hole (702) being provided at the top of the second circulation box (701), a cross hole (703) being provided at the center of the bottom of the second circulation box (701), and a cross discharge port (704) being fixedly connected at the center of the bottom of the second circulation box (701).

5. The construction device for secondary casting of concrete square box hollow floor slab according to claim 4 is characterized in that: A first control component (5) is arranged on the inner side of the second pouring component (7), a second control component (6) is arranged on the top of the first control component (5), and a driving component (4) is arranged on the side of the second control component (6) away from the connecting pipe (303), wherein the driving component (4) drives the moving component (2) and the first control component (5) to move, thereby driving the vehicle body (1) to move on the steel bars at the top of the square box and controlling the discharge frequency of the second pouring component (7).

6. The construction device for secondary casting of concrete square box hollow floor slab according to claim 5 is characterized in that: The moving assembly (2) comprises a moving wheel (201), a first rotating shaft (202) being fixedly connected to a side between the two moving wheels (201) close to the driving assembly (4), and a first bevel gear (203) being fixedly connected to the outer side of the first rotating shaft (202).

7. The construction device for secondary casting of concrete square box hollow floor slab according to claim 6 is characterized in that: The driving assembly (4) comprises a driving motor (401), the output shaft of the driving motor (401) being fixedly connected to a second rotating shaft (402), the top of the outer side of the second rotating shaft (402) being fixedly connected to a first gear (403), the bottom of the second rotating shaft (402) being fixedly connected to a second bevel gear (404), the second bevel gear (404) being meshed with the first bevel gear (203), and the second rotating shaft (402) being rotatably connected to the interior of the vehicle body (1).

8. The construction device for secondary casting of concrete square box hollow floor slab according to claim 7 is characterized in that: The second control component (6) comprises a disk (601), one side of the top of the disk (601) is fixedly connected to a moon-shaped protrusion (602), the other side of the top of the disk (601) is fixedly connected to a driving column (603), the center of the disk (601) is fixedly connected to a central axis, the top of the central axis of the disk (601) is fixedly connected to a second gear (604), the teeth on the outer side of the second gear (604) are meshed with the teeth on the outer side of the first gear (403), and a protective outer box (605) is arranged on the outer side of the second gear (604).

9. The construction device for secondary casting of concrete square box hollow floor slab according to claim 8, characterized in that: The first control component (5) comprises a third rotating shaft (504); a circular hole which is gap-matched with the third rotating shaft (504) is provided on the top of the second circulation box (701); a cross stopper (505) is fixedly connected to the bottom of the third rotating shaft (504); the top of the cross stopper (505) and the bottom of the cross discharge port (704) are at the same height; therefore, a square plate (501) is fixedly connected to the top of the third rotating shaft (504); four corners of the square plate (501) are provided with through grooves (502); four sides of the square plate (501) are meshed with one side of the moon-shaped protrusion (602) away from the center of the circular plate (601); and the through grooves (502) are meshed with the driving column (603).

10. The construction device for secondary casting of concrete square box hollow floor slab according to claim 9, characterized in that: The first control component (5) further comprises a stirring blade (503), wherein one end of the stirring blade (503) away from the third rotating shaft (504) is in contact with the inner side of the second circulation box (701), and the height of the stirring blade (503) is in clearance with the height of the inner side of the second circulation box (701).

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