Arc-shaped side formwork of floor support plate cantilever structure and construction method of arc-shaped side formwork

Abstract

The invention relates to an arc-shaped side formwork of a floor support plate cantilever structure and a construction method of the arc-shaped side formwork, and relates to the field of molds for building cantilever structures.The arc-shaped side formwork comprises a plurality of side formwork bodies with fan-shaped cross sections, fan-shaped mounting grooves corresponding to the side formwork bodies are formed in the lower surfaces of the side formwork bodies, and bottom sealing plates are slidably inserted into the mounting grooves; the cross section of the bottom sealing plate is also fan-shaped, and the bottom sealing plate slides along the height direction of the side die main body; a limiting spring is fixedly connected to the bottom sealing plate, the telescopic direction of the limiting spring is arranged in the height direction of the side die body, the upper end of the limiting spring is fixed to the groove wall of the mounting groove, and the limiting spring enables the whole bottom sealing plate to be located in the mounting groove; a driving assembly for driving the bottom sealing plate to move in the height direction of the side die body is further arranged in the side die body. The method has the effect of improving the percent of pass of the cantilever structure.

Description

Technical Field

[0001] The present application relates to the field of molds for building cantilever structures, and in particular to an arc side formwork for a floor slab cantilever structure and its construction method. Background Art

[0002] The molds for pouring building cantilever structures generally include a bottom formwork and side formworks fixed on the bottom formwork. The bottom formwork and the side formworks cooperate to form a pouring mold for building cantilever structures. For an arc-shaped cantilever structure, a corresponding arc side formwork needs to be constructed, and generally, the arc side formwork is disassembled into multiple side formworks. When fixing the side formworks, multiple side formworks are respectively welded to the bottom formwork, and the multiple side formworks cooperate to form the arc side formwork. When the side formworks are not welded in place, there will be a gap between the arc side formwork and the bottom formwork, resulting in slurry leakage and a low qualification rate of the cantilever structure. Summary of the Invention

[0003] In order to improve the qualification rate of the cantilever structure, the present application provides an arc side formwork for a floor slab cantilever structure and its construction method.

[0004] On the one hand, the present application provides an arc side formwork for a floor slab cantilever structure adopting the following technical solutions: An arc side formwork for a floor slab cantilever structure includes a plurality of side formwork bodies with a fan-shaped cross-section. A fan-shaped installation groove corresponding to it is opened on the lower surface of the side formwork body. A bottom sealing plate is slidably inserted into the installation groove. The cross-section of the bottom sealing plate is also fan-shaped. The bottom sealing plate slides along the height direction of the side formwork body; A limiting spring is fixedly connected to the bottom sealing plate. The telescopic direction of the limiting spring is set along the height direction of the side formwork body. The upper end of the limiting spring is fixed to the groove wall of the installation groove. The limiting spring keeps the bottom sealing plate entirely within the installation groove; A driving assembly for driving the bottom sealing plate to move along the height direction of the side formwork body is further provided in the side formwork body.

[0005] By adopting the above technical solutions, after the side formwork body and the bottom formwork are welded, the operator makes the bottom sealing plate move downward through the driving assembly. While the bottom sealing plate moves, the limiting spring is stretched until the bottom sealing plate deforms and abuts against the bottom formwork. At this time, the bottom sealing plate seals the gap between the lower surface of the side formwork body and the bottom formwork, reducing the occurrence of slurry leakage during grouting, thereby improving the qualification rate of the cantilever structure.

[0006] Optionally, the driving assembly includes a vertically arranged screw rod. The screw rod is located above the bottom sealing plate. The lower end surface of the screw rod abuts against the bottom sealing plate. The screw rod penetrates through the upper surface of the side formwork body and is threadedly connected to the side formwork body.

[0007] By adopting the above technical solution, in the initial state, the limiting spring presses the bottom sealing plate against the lower end face of the screw rod. When it is necessary to move the bottom sealing plate downward, the operator rotates the screw rod to make the screw rod move downward. While the screw rod moves, it can push the bottom sealing plate to move.

[0008] Optionally, the number of the screw rods is more than two, and all the screw rods are evenly distributed along the length direction of the side formwork body. A pressing block is fixedly connected to the lower end of the screw rod. The cross-sectional area of the pressing block is larger than that of the screw rod. The pressing block is located in the installation groove and abuts against the bottom sealing plate.

[0009] By adopting the above technical solution, the pressing block makes the force on the bottom sealing plate more uniform, and the arrangement of multiple screw rods can also make the force on the bottom sealing plate more uniform, so that the bottom sealing plate can move better, and at the same time, the situation that the bottom sealing plate deforms due to uneven force is reduced.

[0010] Optionally, a sliding block is fixedly connected to the bottom sealing plate, and sliding grooves corresponding to the sliding blocks one by one are formed in the groove wall of the installation groove. The length direction of the sliding grooves is arranged along the height direction of the side formwork body, and each sliding block is slidably inserted into the corresponding sliding groove.

[0011] By adopting the above technical solution, the sliding block and the sliding groove cooperate to make the bottom sealing plate slidably connected with the side formwork body.

[0012] Optionally, receiving grooves are formed in the two short side side walls of the side formwork body. The length direction of the receiving grooves is arranged along the height direction of the side formwork body. A side sealing plate is slidably inserted into each receiving groove. The sliding direction of the side sealing plate is arranged along the arc extension direction of the side formwork body; A connecting spring is fixedly connected to the side sealing plate. The telescopic direction of the connecting spring is arranged along the arc extension direction of the side formwork body. One end of the connecting spring far away from the side sealing plate is located on the side of the side sealing plate close to the center of the side formwork body. One end of the connecting spring far away from the side sealing plate is fixed to the groove wall of the receiving groove. The connecting spring makes the side sealing plate integrally located in the receiving groove; A transmission assembly for controlling the movement of the side sealing plate is further provided in the side formwork body.

[0013] By adopting the above technical solution, when the screw rod moves the bottom sealing plate downward, the transmission assembly works to move the two side sealing plates on both sides outward of the side formwork body. When the bottom sealing plate moves in place, the two adjacent side sealing plates abut against each other, so as to seal the gap between two adjacent side formwork bodies, further reducing the occurrence of slurry leakage and further improving the qualification rate of the cantilever structure.

[0014] Optionally, the transmission component includes a cavity formed in the side formwork body. The cavity is located above the installation groove. The screw is inserted into the cavity, and the cavity is located between two receiving grooves and communicates with both receiving grooves. A power box with variable volume is fixedly connected to the top wall of the cavity. The power box includes an upper ring frame fixedly connected to the top wall of the cavity and a lower ring frame located below the upper ring frame. A corrugated pipe is provided between the upper ring frame and the lower ring frame. The surfaces of the upper ring frame and the lower ring frame close to each other are fixedly connected to the corresponding end faces of the corrugated pipe. A bottom plate for sealing the lower ring frame is also fixedly connected to the lower surface of the lower ring frame. An upper plate and a lower plate arranged in sequence from top to bottom are fixedly connected to the screw. The bottom plate is located between the upper plate and the lower plate. The two side sealing plates seal the corresponding receiving grooves, so that a closed space is formed among the side sealing plates, the power box, the receiving grooves and the cavity. A flowable medium is filled in the closed space.

[0015] By adopting the above technical solution, in the initial state, the bottom sealing plate and the side sealing plates are both located in the side formwork body. When the screw pushes the bottom sealing plate to move downward, the screw drives the upper plate and the lower plate to move downward. The upper plate and the lower plate cooperate to drive the bottom plate to move, so that the volume of the power box increases. Since the volume of the medium filled in the closed space remains unchanged, during the process of the increase in the volume of the power box, the medium will push the side sealing plates on both sides to move out of the receiving grooves, and at the same time, the side sealing plates also stretch the connecting springs. When the bottom sealing plate moves in place, the side sealing plates also move in place. At this time, two adjacent side sealing plates are tightly abutted against each other.

[0016] Optionally, a layer of rubber laminate is covered on the side walls of the two side sealing plates away from each other.

[0017] By adopting the above technical solution, when the side sealing plates move in place, two adjacent layers of rubber laminates are deformed and tightly abutted against each other, further enhancing the sealing effect.

[0018] On the other hand, the present application also provides a construction method for the arc-shaped side formwork of a steel deck cantilever structure, adopting the following technical solution: A construction method for the arc-shaped side formwork of a steel deck cantilever structure, using the arc-shaped side formwork of the steel deck cantilever structure described in any one of the above, includes the following steps: S1. Perform three-dimensional modeling according to the design drawings, analyze the radian of the galvanized arc-shaped side formwork of the steel deck cantilever structure, select the center of the circle and control points, and perform reasonable segmentation. S2. Fabricate a side formwork mold according to the type of the arc-shaped side formwork in equal proportion. According to the formed mold, the side formwork is folded into an arc with straight lines instead of curves. Determine the segmentation distance of the fold line cutting through the geometric simulation method to ensure that the error of the fold line arc fitting meets the specifications and construction requirements. S3. When installing the side formwork, use the through-layer plumb line positioning and setting-out technology. Through the three-dimensional positioning and lofting technology, measure the arc center and the control points of the outer edge line of the arc side formwork. At the control points, use cantilever angle steel for marking and positioning. In the order from the top floor of the structure to the ground floor of the first floor, use a through-length steel wire rope for plumb line positioning at the control points. After the arc is completed, the side formwork is welded and positioned close to the steel wire rope to achieve precise control of three-dimensional installation positioning in the plane and elevation; S4. After welding is completed, control the driving component to work, so that the bottom sealing plate moves downward and finally abuts against the bottom formwork. At the same time, the transmission component works, so that two adjacent side sealing plates abut against each other.

[0019] In summary, the present application includes at least one of the following beneficial technical effects: By setting the side formwork body, installation groove, bottom sealing plate, limit spring and driving component, the situation of slurry leakage during grouting is reduced, thereby improving the qualification rate of the cantilever structure; By setting the side sealing plate, connecting spring and transmission component, the gap between two adjacent side formwork bodies can be sealed, further reducing the occurrence of slurry leakage and further improving the qualification rate of the cantilever structure; By setting the cavity, medium, power box, upper plate and lower plate, the side sealing plate can be driven to move. Description of the Drawings

[0020] Figure 1 is a schematic diagram showing the cooperation between the arc side formwork and the bottom formwork in the embodiment of the present application.

[0021] Figure 2 is a cross-sectional view showing the overall structure of the arc side formwork in the embodiment of the present application.

[0022] Figure 3 is a cross-sectional view showing the connection relationship between the bottom sealing plate and the side formwork body in the embodiment of the present application.

[0023] Figure 4 is a cross-sectional view showing the positional relationship between the side sealing plate and the side formwork body in the embodiment of the present application.

[0024] Figure 5 is a cross-sectional view showing the connection relationship between the side sealing plate and the side formwork body in the embodiment of the present application.

[0025] Figure 6 is a cross-sectional view showing the overall structure of the transmission component in the embodiment of the present application.

[0026] Figure 7 is a cross-sectional view showing the overall structure of the power box in the embodiment of the present application.

[0027] Description of reference numerals: 1. Side mold main body; 11. Installation groove; 12. Sliding groove; 13. Accommodation groove; 14. Connection groove; 15. Cavity; 2. Bottom sealing plate; 3. Bearing plate; 31. Slide block; 4. Limit spring; 5. Driving component; 51. Screw rod; 52. Pressing block; 53. Hand wheel; 6. Side sealing plate; 61. Connection block; 62. Rubber laminated plate; 7. Connection spring; 8. Transmission component; 81. Power box; 811. Upper ring frame; 812. Lower ring frame; 813. Bellows; 814. Bottom plate; 82. Upper plate; 83. Lower plate; 9. Bottom formwork. Detailed implementation manners

[0028] The following further elaborates on this application Figure 1-7 in conjunction with the accompanying drawings.

[0029] An embodiment of this application discloses an arc-shaped side mold for a steel deck cantilever structure. Referring to Figure 1 and Figure 2 , it includes a plurality of side mold main bodies 1 with a fan-shaped cross-section. An installation groove 11 is formed on the lower surface of the side mold main body 1. The shape of the installation groove 11 is also fan-shaped, and the shape of the installation groove 11 is adapted to that of the side mold main body 1; a bottom sealing plate 2 adapted to the installation groove 11 is slidably connected in the installation groove 11. In this embodiment, the material of the bottom sealing plate 2 is rubber. In other embodiments, the material of the sealing plate can be selected according to actual situations.

[0030] Referring to Figure 2 and Figure 3 , a layer of bearing plate 3 is fixedly connected to the upper surface of the bottom sealing plate 2. The material hardness of the bearing plate 3 is greater than that of the sealing plate. In this embodiment, the bearing plate 3 is a metal plate; a slide block 31 is fixedly connected to one of the arc-shaped side walls of the bearing plate 3. In this embodiment, the number of slide blocks 31 is two, and the two slide blocks 31 are distributed along the length direction of the bearing plate 3. Slide grooves 12 corresponding to the slide blocks 31 one by one are formed on the groove wall of the installation groove 11. The length direction of the slide grooves 12 is arranged along the height direction of the side mold main body 1. Each slide block 31 is slidably inserted into the corresponding slide groove 12. The cooperation between the slide block 31 and the slide groove 12 enables the bottom sealing plate 2 to be slidably connected to the side mold main body 1.

[0031] A limit spring 4 is fixedly connected to the upper surface of the slide block 31. The telescopic direction of the limit spring 4 is arranged along the height direction of the side mold main body 1. The upper end of the limit spring 4 is fixed to the top groove wall of the slide groove 12; the limit spring 4 limits the slide block 31, the bearing plate 3, and the bottom sealing plate 2. When the limit spring 4 is not subjected to external forces, the limit spring 4 positions the bottom sealing plate 2 entirely within the installation groove 11.

[0032] Referring to Figure 2 and Figure 3, a driving assembly 5 for driving the bottom sealing plate 2 to move is further provided in the side form main body 1. The driving assembly 5 includes a vertically arranged screw rod 51. The screw rod 51 is located above the bearing plate 3. The screw rod 51 penetrates the upper surface of the side form main body 1 and is threadedly connected to the side form main body 1. In this embodiment, the number of the screw rods 51 is two, and the two screw rods 51 are arranged along the length direction of the side form main body 1; in order to make the bearing plate 3 and the bottom sealing plate 2 receive more uniform force and also to reduce the occurrence of deformation of the bearing plate 3, a pressing block 52 is fixedly connected to the lower end of the screw rod 51. The cross-sectional area of the pressing block 52 is larger than that of the screw rod 51, and the pressing block 52 abuts against the bearing plate 3; in order to enable the operator to better rotate the screw rod 51, a hand wheel 53 is also fixedly connected to the upper end of the screw rod 51.

[0033] After the side form main body 1 is welded to the bottom form 9, rotate the hand wheel 53 to make the bolt rotate. The bolt cooperates with the side form main body 1 to make the bolt and the pressing block 52 move downward. At the same time, the pressing block 52 presses the bearing plate, the slider 31 and the bottom sealing plate 2 to move downward. When the slider 31 moves, the slider 31 stretches the limiting spring 4, and the bottom sealing plate 2 moves out of the installation groove 11 until the bottom sealing plate 2 abuts against and deforms the bottom form 9. Stop rotating the hand wheel 53. At this time, the bottom sealing plate 2 cooperates with the bottom form 9 to be able to seal the gap between the side form main body 1 and the bottom form 9, reduce the occurrence of grout leakage, and improve the qualification rate of the cantilever structure.

[0034] Refer to Figure 4 And Figure 5 , in order to further reduce the occurrence of grout leakage, receiving grooves 13 are respectively formed on the two short side side walls of the side form main body 1. The length direction of the receiving grooves 13 is arranged along the height direction of the side form main body 1, and the depth direction of the receiving grooves 13 is arranged along the extending direction of the arc of the side form main body 1; a side sealing plate 6 is slidably inserted into each receiving groove 13, and the side sealing plate 6 is adapted to the corresponding receiving groove 13.

[0035] A connecting block 61 is fixedly connected to one of the arc-shaped side walls of the side sealing plate 6. Connecting grooves 14 corresponding to the connecting blocks 61 are formed on the groove walls of the receiving grooves 13. The length direction of the connecting grooves 14 is arranged along the extending direction of the arc of the side form main body 1. Each connecting block 61 is slidably inserted into the corresponding connecting groove 14; the connecting block 61 and the connecting groove 14 cooperate to enable the side sealing plate 6 to slide along the extending direction of the arc of the side form main body 1.

[0036] A connecting spring 7 is fixedly connected to the side wall of the connecting block 61 close to the center of the side die body 1. The extending direction of the connecting spring 7 is the same as the length direction of the connecting groove 14. One end of the connecting spring 7 away from the connecting block 61 is fixedly connected to the groove wall at the corresponding end of the connecting groove 14. The connecting spring 7 is located on the side of the connecting block 61 close to the center of the side die body 1. To enhance the sealing effect, a layer of rubber laminate 62 is covered on the side walls of the two side sealing plates 6 away from each other. When the connecting spring 7 is not under external force, the connecting spring 7 makes the side sealing plate 6 completely located in the receiving groove 13.

[0037] Refer to Figure 5 , Figure 6 and Figure 7 , a transmission component 8 for driving the side sealing plate 6 to slide is further provided in the side die body 1. A cavity 15 is formed in the side die body 1. The cavity 15 is located above the installation groove 11 and between the two receiving grooves 13. The two receiving grooves 13 communicate with the cavity 15, and the cavity 15 does not communicate with the installation groove 11. Both bolts are inserted into the cavity 15. The transmission component 8 includes a power box 81 fixedly connected to the top cavity wall of the cavity 15. The volume of the power box 81 is variable. The side sealing plate 6 seals the notch of the receiving groove 13, so that a sealed space is formed among the side sealing plate 6, the receiving groove 13, the cavity 15 and the power box 81. A medium is filled in this sealed space. The medium has fluidity and is not shown in the accompanying drawings of the specification.

[0038] The power box 81 includes an upper ring frame 811 fixedly connected to the top wall of the cavity 15 and a lower ring frame 812 located below the upper ring frame 811. A corrugated pipe 813 is provided between the upper ring frame 811 and the lower ring frame 812. The surfaces of the upper ring frame 811 and the lower ring frame 812 close to each other are fixedly connected to the corresponding end faces of the corrugated pipe 813. A bottom plate 814 for blocking the bottom of the lower ring frame 812 is further fixedly connected to the lower surface of the lower ring frame 812. The upper ring frame 811, the lower ring frame 812, the corrugated pipe 813 and the bottom plate 814 are all made of metal. An upper plate 82 and a lower plate 83 are fixedly connected to each screw rod 51. The upper plate 82 is located above the lower plate 83, and the bottom plate 814 is located between the upper plate 82 and the lower plate 83.

[0039] When the handwheel 53 is rotated to move the screw rod 51 downward, the screw rod 51 drives the upper plate 82 and the lower plate 83 to move, so that the lower ends of the bottom plate 814, the lower ring frame 812 and the corrugated pipe 813 move downward, thereby extending the length of the corrugated pipe 813 and increasing the volume of the power box 81. At the same time, the volume of the sealed space formed between the side sealing plate 6, the receiving groove 13, the cavity 15 and the power box 81 decreases. Since the volume of the medium remains unchanged, during the process of the power box 81 getting larger in volume, the medium will push the side sealing plates 6 on both sides to move outward from the receiving groove 13, so that the volume of the sealed space formed between the side sealing plate 6, the receiving groove 13, the cavity 15 and the power box 81 increases.

[0040] When the side sealing plate 6 moves, the connecting spring 7 is stretched. When the screw rod 51 rotates in place, the bottom sealing plate 2 abuts tightly against the bottom template 9, and the rubber layer plate 62 and part of the side sealing plate 6 also move outside the side form main body 1, so that the two rubber layer plates 62 close to each other are deformed and abutted tightly; the cooperation of the two side sealing plates 6 and the rubber layer plate 62 can seal the gap between two adjacent side form main bodies 1, further reducing the possibility of slurry leakage, and thus further improving the qualification rate of the cantilever structure.

[0041] The implementation principle of the arc-shaped side form of the floor slab cantilever structure in the embodiment of the present application is as follows: after the side form main body 1 and the bottom template 9 are welded, rotate the handwheel 53 to move the two screw rods 51 downward. The screw rod 51 moves and pushes the bottom sealing plate 2 downward, deforming the bottom sealing plate 2 to abut tightly against the bottom template 9. At the same time, the movement of the screw rod 51 also drives the upper plate 82 and the lower plate 83 to move, increasing the volume of the power box 81. During this process, the medium flows and pushes the two side sealing plates 6 to move outside the side form main body 1 until the two rubber layer plates 62 close to each other are deformed and abutted tightly; when the bottom sealing plate 2 and the side sealing plates 6 move in place, stop rotating the screw rod 51.

[0042] The embodiment of the present application also discloses a construction method of the arc-shaped side form of the floor slab cantilever structure, using the arc-shaped side form of the floor slab cantilever structure as described above, including the following steps: S1. Perform three-dimensional modeling according to the design drawings, analyze the radian of the galvanized arc-shaped side form of the floor slab cantilever structure, select the center of the circle and the control points, and perform reasonable segmentation; S2. Make the side form mold according to the type of the arc-shaped side form in equal proportion. According to the formed mold, the side form is approximated by a broken line instead of a curve. The segmentation distance of the broken line cutting is determined by the geometric simulation method to ensure that the error of the broken line approximation meets the specifications and construction requirements; S3. When installing the side formwork, use the through-layer plumb line positioning and setting-out technology. Through the three-dimensional positioning and lofting technology, measure the center of the arc and the control points of the outer side line of the arc-shaped side formwork. At the control points, use cantilever angle steel for marking and positioning. In the order from the top floor to the ground floor of the structure, use a through-length steel wire rope for plumb line positioning at the control points. After the arc is formed, the side formwork is welded and positioned closely against the steel wire rope to achieve precise control of three-dimensional installation positioning in the plane and elevation; When constructing the arc-shaped side formwork, due to its arc-shaped structure, it is not easy to position, resulting in a certain deviation between the fixed position of the arc-shaped side formwork on the bottom formwork 9 and the designed position. Eventually, the formed cantilever structure is unqualified and the qualified rate of the cantilever structure is low. Through the above steps, the problem of positioning deviation can be effectively improved, the positioning accuracy can be improved, and thus the qualified rate of the cantilever structure is increased; S4. After welding is completed, control the driving assembly 5 to work, so that the bottom sealing plate 2 moves downward and finally abuts against the bottom formwork 9. At the same time, the transmission assembly 8 works to make two adjacent side sealing plates 6 abut against each other.

[0043] After welding is completed, rotate the handwheel 53 to make the screw rod 51 move downward and push the bottom sealing plate 2 downward, causing the bottom sealing plate 2 to deform and abut against the bottom formwork 9. At the same time, the movement of the screw rod 51 also increases the volume of the power box 81. During this process, the power box 81 makes the medium flow, and the flow of the medium can push the two side sealing plates 6 to move outward from the side formwork body 1. When the bottom sealing plate 2 moves in place, the two rubber laminate plates 62 that are close to each other deform and abut against each other, thus reducing the leakage of slurry during grouting and increasing the qualified rate of the cantilever structure.

[0044] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An arc-shaped side formwork for a steel deck cantilever structure, comprising a plurality of side formwork bodies (1) with a fan-shaped cross-section, characterized in that: A sector-shaped installation groove (11) corresponding to it is formed on the lower surface of the side mold body (1). A bottom sealing plate (2) is slidably inserted into the installation groove (11). The cross-section of the bottom sealing plate (2) is also sector-shaped. The bottom sealing plate (2) slides along the height direction of the side mold body (1); A limiting spring (4) is fixedly connected to the bottom sealing plate (2). The telescopic direction of the limiting spring (4) is set along the height direction of the side mold body (1). The upper end of the limiting spring (4) is fixed to the groove wall of the installation groove (11). The limiting spring (4) keeps the bottom sealing plate (2) entirely within the installation groove (11); A driving assembly (5) for driving the bottom sealing plate (2) to move along the height direction of the side mold body (1) is further provided in the side mold body (1).

2. The arc side form of a steel deck cantilever structure according to claim 1, wherein: The driving assembly (5) includes a vertically arranged screw rod (51). The screw rod (51) is located above the bottom sealing plate (2). The lower end face of the screw rod (51) abuts against the bottom sealing plate (2). The screw rod (51) penetrates through the upper surface of the side mold body (1) and is threadedly connected to the side mold body (1).

3. The arc side form of a floor slab cantilever structure according to claim 2, characterized in that: The number of the screw rods (51) is more than two. All the screw rods (51) are evenly distributed along the length direction of the side mold body (1). A pressing block (52) is fixedly connected to the lower end of the screw rod (51). The cross-sectional area of the pressing block (52) is larger than that of the screw rod (51). The pressing block (52) is located in the installation groove (11) and abuts against the bottom sealing plate (2).

4. The arc side form of a profiled steel sheet for concrete slab cantilever structure according to claim 1, wherein: A sliding block (31) is fixedly connected to the bottom sealing plate (2). Corresponding sliding grooves (12) are formed on the groove wall of the installation groove (11). The length direction of the sliding grooves (12) is set along the height direction of the side mold body (1). Each sliding block (31) is slidably inserted into the corresponding sliding groove (12).

5. An arc side form of a steel deck cantilever structure according to any one of claims 2 or 3, characterized in that: Receiving grooves (13) are formed on both short side side walls of the side mold body (1). The length direction of the receiving grooves (13) is set along the height direction of the side mold body (1). A side sealing plate (6) is slidably inserted into each receiving groove (13). The sliding direction of the side sealing plate (6) is set along the arc extension direction of the side mold body (1); A connecting spring (7) is fixedly connected to the side sealing plate (6). The telescopic direction of the connecting spring (7) is set along the arc extension direction of the side mold body (1). The end of the connecting spring (7) far from the side sealing plate (6) is located on the side of the side sealing plate (6) close to the center of the side mold body (1). The end of the connecting spring (7) far from the side sealing plate (6) is fixed to the groove wall of the receiving groove (13). The connecting spring (7) keeps the side sealing plate (6) entirely within the receiving groove (13); A transmission assembly (8) for controlling the movement of the side sealing plate (6) is further provided in the side mold body (1).

6. The arc side form of a floor bearing plate cantilever structure according to claim 5, characterized in that: The transmission assembly (8) includes a cavity (15) formed in the side mold body (1). The cavity (15) is located above the installation groove (11). The screw rod (51) is inserted into the cavity (15). And the cavity (15) is located between the two receiving grooves (13). The cavity (15) is communicated with both receiving grooves (13); A power box (81) with variable volume is fixedly connected to the top cavity wall of the cavity (15). The power box (81) includes an upper ring frame (811) fixedly connected to the top cavity wall of the cavity (15), and a lower ring frame (812) located below the upper ring frame (811). A corrugated pipe (813) is provided between the upper ring frame (811) and the lower ring frame (812). The surfaces of the upper ring frame (811) and the lower ring frame (812) close to each other are fixed to the corresponding end faces of the corrugated pipe (813). A bottom plate (814) for sealing the lower ring frame (812) is also fixedly connected to the lower surface of the lower ring frame (812). An upper plate (82) and a lower plate (83) arranged in sequence from top to bottom are fixedly connected to the screw rod (51). The bottom plate (814) is located between the upper plate (82) and the lower plate (83). The two side sealing plates (6) seal the corresponding receiving grooves (13), so that a closed space is formed among the side sealing plates (6), the power box (81), the receiving grooves (13) and the cavity (15). A flowable medium is filled in the closed space.

7. The arc-shaped side form of the steel deck cantilever structure according to claim 5, characterized in that: A layer of rubber laminated board (62) covers the side walls of the two side sealing plates (6) away from each other.

8. A construction method for an arc side form of a steel deck cantilever structure, characterized in that, Using the arc-shaped side form of the floor bearing plate cantilever structure described in any one of claims 5 to 7 above, the following steps are included: S1. Perform three-dimensional modeling according to the design drawings, analyze the radian of the galvanized arc-shaped side form of the floor bearing plate cantilever structure, select the center of the circle and control points, and perform reasonable segmentation. S2. Make the side form die according to the type of the arc-shaped side form in equal proportion. According to the formed die, the side form is approximated by a broken line instead of a curve. The segmentation spacing of the broken line cutting is determined by the geometric simulation method to ensure that the error of the broken line approximation meets the specifications and construction requirements. S3. When installing the side formwork, use the through-layer suspension line positioning and setting-out technology. Through the three-dimensional positioning and setting-out technology, measure the center of the arc and the control points of the outer edge line of the arc-shaped side form. The control points are marked and positioned with cantilever angle steels. In the order from the top floor to the ground floor of the structure, use a through-length steel wire rope to perform suspension line positioning at the control points. After the arc approximation is completed, the side formwork is welded and positioned close to the steel wire rope to achieve precise control of the three-dimensional installation positioning in the plane and elevation. S4. After welding is completed, control the driving assembly (5) to work, so that the bottom sealing plate (2) moves downward and finally abuts against the bottom formwork (9). At the same time, the transmission assembly (8) works to make the two adjacent side sealing plates (6) abut against each other.

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