A standardized formwork support system for precast cantilever beams

Abstract

The present invention discloses a standardized formwork support system between precast cantilever beams, belonging to the technical field of building construction. The precast cantilever beam includes a cantilever beam body, an upper wing plate and a lower wing plate arranged on both sides of the cantilever beam body. The adjustable side formwork includes a base, a telescopic plate, an elastic support device and an elastic shrinkage sealing plate. The base is fixed on the side surface of the bottom formwork, a limiting groove is formed on the upper side surface of the base, and the opening of the limiting groove is closed by the elastic shrinkage sealing plate. A plurality of shrinkage holes are arranged in an array along the length direction of the bottom formwork on the elastic shrinkage sealing plate, and a telescopic plate is correspondingly installed in each shrinkage hole. Adjacent two telescopic plates are closely adjacent to each other. The telescopic plate is in sealing cooperation with the shrinkage hole and can slide vertically. The bottom of the telescopic plate is connected to the bottom of the limiting groove through the elastic support device. The system of the present invention can indirectly support the bottom formwork, avoiding the problem of inconvenient support caused by too high construction height.

Description

Technical Field

[0001] The present invention belongs to the technical field of building construction, and particularly relates to a standardized formwork support system for precast cantilever beams. Background Art

[0002] The shapes and functions of modern buildings are becoming increasingly complex, which brings great challenges to both design and construction. Cantilever structures have attracted the attention of architects with their special shapes and are gradually applied to building works. Some special building structures require the cantilever beams to be arranged in a DNA-like spiral pattern. The existing construction method usually hoists and connects the precast cantilever beams in the above manner in sequence, and then pours concrete in the gap between the precast beams of two adjacent cantilever beams to increase the structural strength of the connection between the beams, and then completes the construction. As the construction height increases, the installation and support of the bottom formwork are restricted, which greatly affects the construction progress. Moreover, due to the height difference between the connecting wing plates of two adjacent cantilever beams, it is very difficult for the bottom formwork to fit the bottom surfaces of the two cantilever beams at the same time, thus affecting the construction quality. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a standardized formwork support system for precast cantilever beams, which can solve the above technical problems.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A standardized formwork support system for precast cantilever beams of the present invention, the precast cantilever beam includes a cantilever beam body, upper wing plates and lower wing plates arranged on both sides of the cantilever beam body, the upper wing plate and the lower wing plate of the adjacent cantilever beam body are connected through a cast-in-place section, the formwork support system is used to support the cast-in-place section, the formwork support system includes a bottom formwork, adjustable side formworks installed on both sides of the bottom formwork, and end formworks located at both ends of the bottom formwork. A buried pipe is connected to the middle of the upper surface of the bottom formwork, and the upper end of the buried pipe extends upward and is connected to a support frame. The support frame and the bottom formwork are respectively located on the upper and lower sides of the cast-in-place section; the adjustable side formwork includes a base, a telescopic plate, an elastic support device and an elastic shrinkage sealing plate. The base is fixed on the side surface of the bottom formwork, a limiting groove is opened on the upper side surface of the base, the opening of the limiting groove is closed by the elastic shrinkage sealing plate, a plurality of shrinkage holes are arranged in an array along the length direction of the bottom formwork on the elastic shrinkage sealing plate, each shrinkage hole is correspondingly installed with a telescopic plate, two adjacent telescopic plates are closely adjacent to each other, the telescopic plate is hermetically matched with the shrinkage hole and can slide vertically, and the bottom of the telescopic plate is connected to the bottom of the limiting groove through the elastic support device.

[0006] Furthermore, the opening of the limiting groove is in a trapezoidal structure that gradually becomes smaller from the inner side to the outer side of the base. The two telescopic plates at both ends of the limiting groove correspond to the two side edges of the trapezoidal opening respectively, and the inner wall of the contraction hole is always in close contact with the outer wall of the telescopic plate.

[0007] Furthermore, a number of elastic sealing blocks are arranged between adjacent telescopic plates. The elastic sealing blocks are evenly spaced along the vertical direction, and strip-shaped vertical grooves for installing the elastic sealing blocks are formed on the side surfaces of the telescopic plates.

[0008] Furthermore, a mounting seat is fixed to the upper side surface of the embedded pipe. A threaded hole is formed in the mounting seat, and a hanging rod is threadedly connected in the threaded hole.

[0009] Furthermore, a number of limiting cylinders are evenly spaced along the longitudinal direction of the bottom formwork at the bottom of the bottom formwork. The upper ends of the limiting cylinders are communicated with the embedded pipes. A balance support structure is arranged in the limiting cylinders. The balance support structure includes a screw rod, a first limiting plate, a second limiting plate, a first pin shaft, a second pin shaft, a first support, a first connecting rod and a second connecting rod. The rotation planes of the first connecting rod and the second connecting rod are in the same plane and perpendicular to the plane where the bottom formwork is located. One end of the first connecting rod is pivotally connected to the first pin shaft, and the other end is pivotally connected to the first support. One end of the second connecting rod is pivotally connected to the first support, and the other end is pivotally connected to the second pin shaft. The first connecting rod and the second connecting rod are on the same side of the screw rod. Correspondingly, a first opening for the first connecting rod and the second connecting rod to extend out is formed on the side surface of the limiting cylinder. A through hole is formed in the first pin shaft along its radial direction, and a threaded hole is formed in the second pin shaft along its radial direction. The screw rod passes through the through hole in the first pin shaft and is threadedly connected to the threaded hole in the second pin shaft. The first limiting plate and the second limiting plate are fixedly spaced apart in the middle of the screw rod. The first limiting plate and the second limiting plate are used to limit the first pin shaft.

[0010] Furthermore, the balance support structure further includes a third connecting rod, a second support and a fourth connecting rod. One end of the third connecting rod is pivotally connected to the first pin shaft, and the other end is pivotally connected to the second support. One end of the fourth connecting rod is pivotally connected to the second support, and the other end is pivotally connected to the second pin shaft. The third connecting rod and the fourth connecting rod are on the same side of the screw rod. The first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod form a parallelogram structure. Correspondingly, a second opening for the third connecting rod and the fourth connecting rod to extend out is formed on the other side surface of the limiting cylinder.

[0011] Furthermore, the upper end of the screw rod extends out of the embedded pipe. A through hole is formed in the upper end of the screw rod along its radial direction, and a rotating support rod is installed in the through hole.

[0012] Further, the support frame includes a plurality of cross bars arranged at uniform intervals longitudinally, and longitudinal bars connecting the cross bars together. First sliding holes and second sliding holes are respectively formed at both ends of the cross bar vertically. A first support pillar and a second support pillar are respectively slidably inserted into the first sliding hole and the second sliding hole, and the first support pillar and the second support pillar are fixed to the cross bar through locking members; a third sliding hole for the embedded pipe to pass through is formed vertically in the middle of the cross bar, and the embedded pipe is fixed to the cross bar through a locking member.

[0013] Further, a fourth sliding hole for the longitudinal bar to pass through is formed longitudinally on the side surface of the cross bar. An opening groove is formed longitudinally on the longitudinal bar, and a first limiting screw rod and a second limiting screw rod are respectively connected to both ends of the opening groove. The first limiting screw rod and the second limiting screw rod are used to limit the cross bar.

[0014] The beneficial effects of the present invention are as follows:

[0015] In a precast cantilever beam standardized formwork support system of the present invention, the embedded pipe extends out from between the beams, so that the bottom formwork on the lower side of the cantilever beam body can be connected to the upper support frame through the embedded pipe. When pouring the cast-in-place section, the bottom formwork can be indirectly supported, avoiding the problem of inconvenient support caused by too high construction height.

[0016] In the support system of the present invention, since adjustable side formworks are installed on both sides of the bottom formwork, the support height of the adjustable side formworks can be adjusted in a timely manner, thus solving the problem that there is a height difference between the bottom surfaces of two cantilever beams and improving the construction quality and convenience.

[0017] In the support system of the present invention, by arranging multiple sets of telescopic plates longitudinally, the number of telescopic plates required can be reasonably selected according to the length requirement of the cantilever beam, thus solving the problem that there is a length difference between the cantilever beams.

[0018] Other advantages, objectives and features of the present invention will be described in the subsequent specification, and to some extent, they are obvious to those skilled in the art, or those skilled in the art can obtain teachings from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0020] Figure 1 It is a schematic structural diagram of the support system of the present invention Figure 1 ;

[0021] Figure 2 It is a schematic structural diagram of the support system of the present invention Figure 2 ;

[0022] Figure 3 is Figure 2 The enlarged view at C;

[0023] Figure 4 is the structural schematic diagram of the support frame;

[0024] Figure 5 is Figure 4 The enlarged view at A;

[0025] Figure 6 is the structural schematic diagram of the adjustable side formwork;

[0026] Figure 7 is Figure 6 The enlarged view at B;

[0027] Figure 8 is the sectional view of the adjustable side formwork;

[0028] Figure 9 is the structural schematic diagram of the balance support structure;

[0029] Figure 10 is the structural schematic diagram of the screw;

[0030] Figure 11 is the transformation schematic diagram of the balance support structure;

[0031] Figure 12 is the schematic diagram of the first support stage;

[0032] Figure 13 is the schematic diagram of the second support stage;

[0033] Figure 14 is the schematic diagram of the third support stage;

[0034] Figure 15 is the schematic diagram of the cooperation between the support system and the precast cantilever beam;

[0035] Figure 16 is the layout schematic diagram of the heating wire.

[0036] The labels in the attached drawings are as follows: cantilever beam body 1, upper wing plate 2, lower wing plate 3, cast-in-place section 4, bottom formwork 5, adjustable side formwork 6, end formwork 7, embedded pipe 8, support frame 9, base 10, telescopic plate 11, elastic support device 12, elastic shrinkage seal plate 13, limit groove 14, elastic seal block 15, strip-shaped vertical groove 16, mounting seat 17, suspension rod 18, limit cylinder 19, screw rod 20, first limit plate 21, second limit plate 22, first pin shaft 23, second pin shaft 24, first support 25, first connecting rod 26, second connecting rod 27, third connecting rod 28, second support 29, fourth connecting rod 30, through hole 31, rotating support rod 32, cross bar 33, longitudinal rod 34, first sliding hole 35, second sliding hole 36, first support column 37, second support column 38, locking part 39, third sliding hole 40, fourth sliding hole 41, opening groove 42, first limit screw rod 43, second limit screw rod 44, heating wire 45, temperature sensor 46. Detailed implementation mode

[0037] As Figures 1 to 16 shown, a standardized formwork support system for precast cantilever beams in the present invention, the precast cantilever beam includes a cantilever beam body 1, an upper wing plate 2 and a lower wing plate 3 arranged on both sides of the cantilever beam body 1. The precast cantilever beam of the present invention adopts an existing structure with a Z-shaped cross-section. The upper wing plate 2 is arranged on the upper left side of the cantilever beam body 1, and the lower wing plate 3 is arranged on the lower right side of the cantilever beam body 1. During pouring, it is necessary to connect the upper wing plate 2 of one cantilever beam body 1 with the lower wing plate 3 of the adjacent cantilever beam body 1 through a cast-in-place section 4 to improve the structural strength and meet the requirements of the building design or safety performance.

[0038] In the present invention, a formwork support system needs to be adopted to support the cast-in-place section 4 during pouring. The formwork support system includes a bottom formwork 5, adjustable side formworks 6 installed on both sides of the bottom formwork 5, and end formworks 7 located at both ends of the bottom formwork 5. The bottom formwork 5 is located on the lower side of the gap between two cantilever beam bodies 1. Two groups of adjustable side formworks 6 are perpendicular to the bottom formwork 5 and are located on both sides of the bottom formwork 5 to support both sides of the cast-in-place section 4, and the end formworks 7 are located at the ends of the bottom formwork 5 to support the ends of the cast-in-place section 4. For the convenience of expression, only one group of end formworks 7 is shown in this embodiment, and it can be installed and disassembled on the upper side of the precast cantilever beam. It can be understood that a top formwork can also be provided on the upper side of the cast-in-place section 4, but the normal pouring of the cast-in-place section 4 will not be affected without setting the top formwork.

[0039] In the embodiment of the present invention, a buried pipe 8 is connected to the middle of the upper surface of the bottom formwork 5. Five buried pipes 8 are arranged at equal intervals along the length direction of the bottom formwork 5. The upper ends of the buried pipes 8 extend upward and are connected to the support frame 9, and the five buried pipes 8 are simultaneously connected to the same support frame 9. In this embodiment, the buried pipe 8 is made of plastic material. After the casting of the cast-in-place section 4 is completed, it can be buried in the cast-in-place section 4, which is also convenient for the subsequent removal and hoisting of the support frame 9 and the bottom formwork 5.

[0040] It can be understood that the support frame 9 and the bottom formwork 5 are respectively located on the upper and lower sides of the cast-in-place section 4. The buried pipe 8 extends out from between the beams, so that the bottom formwork 5 on the lower side of the cantilever beam body 1 can be connected to the support frame 9 on the upper side through the buried pipe 8. When the cast-in-place section 4 is being cast, through the supporting action of the support frame 9, the bottom formwork 5 can be indirectly supported, avoiding the problem of inconvenient support caused by too high construction height.

[0041] Specifically, in the present invention, the adjustable side formwork 6 includes a base 10, a telescopic plate 11, an elastic support device 12 and an elastic shrinkage sealing plate 13. The base 10 is strip-shaped and is arranged along the length direction of the bottom formwork 5. The base 10 is fixed on the side of the bottom formwork 5. A limiting groove 14 is opened on the upper side surface of the base 10, and the upper opening of the limiting groove 14 is used to accommodate the telescopic plate 11, the elastic support device 12 and the elastic shrinkage sealing plate 13. Among them, the opening of the limiting groove 14 is closed by the elastic shrinkage sealing plate 13. A plurality of shrinkage holes are arranged in an array along the length direction of the bottom formwork 5 on the elastic shrinkage sealing plate 13. Each shrinkage hole is correspondingly provided with a telescopic plate 11. Since the telescopic plate 11 can close the shrinkage hole, accurately speaking, the opening of the limiting groove 14 is closed by the combination of the elastic shrinkage sealing plate 13 and the shrinkage plate, which can prevent the leakage of concrete caused by the up and down telescopic displacement of the telescopic plate 11.

[0042] Among them, two adjacent telescopic plates 11 are closely adjacent to each other. This implementation method can be achieved by making the positions of two shrinkage holes close to each other, so that two adjacent telescopic plates 11 can be as close as possible to avoid the concrete flowing out from the gap between the plates. At the same time, the telescopic plate 11 is in sealing cooperation with the shrinkage hole and can slide vertically. The bottom of the telescopic plate 11 is connected to the bottom of the limiting groove 14 through the elastic support device 12. By elastically supporting the telescopic plate 11, the support height of the adjustable side formwork 6 can be adjusted in a timely manner, thus solving the problem of height difference between the bottom surfaces of two cantilever beams and improving the construction quality and convenience. For example, when the upper wing plate 2 of the left precast cantilever beam is higher, the compression amount of the telescopic plate 11 in the adjustable side formwork 6 on the left side of the bottom formwork 5 is smaller, but the compression amount of the telescopic plate 11 in the adjustable side formwork 6 on the right side of the bottom formwork 5 is larger, so as to ensure that the bottom formwork 5 always remains horizontal and is convenient for the formation of the cast-in-place section 4.

[0043] In this embodiment, the opening of the limiting groove 14 is in a trapezoidal structure that gradually becomes smaller from the inner side to the outer side of the base 10, that is, the opening of the limiting groove 14 is a trapezoidal opening, and the bottom edge of the trapezoidal opening is located on the side of the base 10 facing the middle embedded pipe 8. The two telescopic plates 11 at both ends of the limiting groove 14 correspond to the two side edges of the trapezoidal opening respectively. The normal aperture of the contraction hole is smaller than the outer shape of the telescopic plate 11, so that the inner wall of the contraction hole can always be in close contact with the outer wall of the telescopic plate 11 under the action of its own elastic force. By adopting the trapezoidal opening, when pouring the cast-in-place section 4, since the inner side of the telescopic plate 11 is subjected to the pressure of the concrete, the telescopic plate 11 moves away from the cast-in-place section 4. At this time, under the action of the side edge of the trapezoidal opening, the two telescopic plates 11 at both ends of the limiting groove 14 can move laterally while moving outwards, so that each telescopic plate 11 can also be pressed tightly in the length direction, increasing the sealing performance between adjacent two telescopic plates 11 on the side, further preventing the leakage of concrete, and facilitating the construction.

[0044] In this embodiment, a plurality of elastic sealing blocks 15 are arranged between adjacent two telescopic plates 11, and each elastic sealing block 15 is made of rubber material. The elastic sealing blocks 15 are arranged at equal intervals along the vertical direction. A strip-shaped vertical groove 16 for installing the elastic sealing blocks 15 is formed on the side surface of the telescopic plate 11. The strip-shaped vertical grooves 16 of adjacent two telescopic plates 11 are simultaneously used to accommodate the same group of elastic sealing blocks 15. By combining with the elastic sealing blocks 15, the gap between the telescopic plates 11 can be sealed, reducing the leakage of concrete. At the same time, by using a combination of multiple elastic sealing blocks 15, it can also adapt to the height changes of different telescopic plates 11, improving the sealing performance and adaptability between the telescopic plates 11.

[0045] In this embodiment, a mounting seat 17 is fixed on the upper side surface of the embedded pipe 8. A threaded hole is formed in the mounting seat 17, and a suspender 18 is threadedly connected in the threaded hole. By providing the mounting seat 17 and the suspender 18, it is convenient for hoisting the embedded pipe 8 and the bottom formwork 5 at its bottom, and it is also convenient to fix the embedded pipe 8 on the support frame 9, facilitating the subsequent construction work.

[0046] In this embodiment, a plurality of limiting cylinders 19 are arranged at equal intervals along the longitudinal direction of the bottom formwork 5 at the bottom of the bottom formwork 5. The limiting cylinders 19 are in a square cylinder structure. The upper end of the limiting cylinder 19 is open and the upper end of the limiting cylinder 19 is communicated with the embedded pipe 8. The lower end of the limiting cylinder 19 is provided with a hole for the screw 20 to pass through to avoid interference. At the same time, the lower end of the limiting cylinder 19 can be used to limit the balance support structure, facilitating the subsequent smooth development of the lateral support.

[0047] In the present invention, due to the height difference between the two precast cantilever beams, the structure of the cast-in-place section 4 should be special-shaped, which results in different thicknesses on both sides of the cast-in-place section 4. Since the middle of the bottom formwork 5 is only supported by pulling through the embedded pipe 8, it is very easy to cause the imbalance problem of the bottom formwork 5 during pouring. To solve this problem, in this embodiment, a balance support structure is provided in the limiting cylinder 19. The balance support structure is mainly used to support the bottom formwork 5 transversely. The combination of multiple groups of balance support structures can just be used to support each transverse position of the bottom formwork 5 at intervals in the length direction, so as to avoid the imbalance problem of the cast-in-place section 4 during pouring.

[0048] Among them, in the present invention, the balance support structure includes a screw rod 20, a first limiting plate 21, a second limiting plate 22, a first pin shaft 23, a second pin shaft 24, a first support 25, a first connecting rod 26 and a second connecting rod 27. The screw rod 20 is arranged vertically and extends into the limiting cylinder 19 after being inserted through the embedded pipe 8, and the lower end can pass through the hole opened at the bottom of the limiting cylinder 19. The following introduces the situation where the combination of the first connecting rod 26 and the second connecting rod 27 is used to support one side of the bottom formwork 5.

[0049] Among them, the rotation planes of the first connecting rod 26 and the second connecting rod 27 are in the same plane and perpendicular to the plane where the bottom formwork 5 is located. Therefore, when the two pin shaft hinge points of the first connecting rod 26 and the second connecting rod 27 are close to each other to the shortest, the first connecting rod 26 and the second connecting rod 27 can form a transverse support structure to support the bottom formwork 5. The specific connection method is that the upper end of the first connecting rod 26 is pivotally connected to the first pin shaft 23, the lower end is pivotally connected to the first support 25, the upper end of the second connecting rod 27 is pivotally connected to the first support 25, and the lower end is pivotally connected to the second pin shaft 24. The first connecting rod 26 and the second connecting rod 27 are located on the same side of the screw rod 20. Correspondingly, a first opening for the first connecting rod 26 and the second connecting rod 27 to extend out is opened on the side surface of the limiting cylinder 19. A through hole is opened along the radial direction of the first pin shaft 23, and a threaded hole is opened along the radial direction of the second pin shaft 24. The screw rod 20 passes through the through hole on the first pin shaft 23 and is threadedly connected to the threaded hole on the second pin shaft 24. The first limiting plate 21 and the second limiting plate 22 are fixedly spaced apart in the middle of the screw rod 20, and the first limiting plate 21 and the second limiting plate 22 are used to limit the first pin shaft 23.

[0050] Similar to the connection manner of the first link 26 and the second link 27, the balance support structure of the present invention further includes a third link 28, a second support 29 and a fourth link 30. One end of the third link 28 is pivotally connected to the first pin shaft 23, and the other end is pivotally connected to the second support 29. One end of the fourth link 30 is pivotally connected to the second support 29, and the other end is pivotally connected to the second pin shaft 24. The third link 28 and the fourth link 30 are located on the same side of the screw 20. The first link 26, the second link 27, the third link 28 and the fourth link 30 are combined to form a parallelogram structure. A second opening for the third link 28 and the fourth link 30 to extend out is correspondingly provided on the other side of the limiting cylinder 19.

[0051] The working process of the device is briefly described as follows: At this time, it is in stage one. After fixing the embedded pipe 8 to the support frame 9, the entire balance support structure is inserted into the limiting cylinder 19 through the embedded pipe 8. At this time, the first link 26 and the third link 28 are in the closest position, and the second link 27 and the fourth link 30 are in the closest position. The upper end of the screw 20 is sufficient to protrude from the upper end of the embedded pipe 8, or the screw 20 can be connected to the rotary drive structure to facilitate its rotation. The rotating support rod 32 is short enough to rotate within the embedded pipe 8. When the screw 20 is rotated, the screw 20 passes through the lower end of the limiting cylinder 19. However, each link is limited by the limiting cylinder 19. The screw 20 drives the first pin shaft 23 to move downward through the first limiting plate 21, so that the first pin shaft 23 gradually approaches the second pin shaft 24. At this time, the first support 25 and the second support 29 move away from each other, and the two pin-jointed ends of the first link 26 and the second link 27 approach each other, so that the first link 26 and the second link 27 also approach each other. At the same time, the third link 28 and the fourth link 30 also approach each other, gradually forming a lateral support structure that can be used to support the bottom formwork 5 laterally. At this time, it is in stage two. After the structure is formed, the balance support structure can be lifted upward and abutted against the bottom of the bottom formwork 5, and then locked by a detachable locking device. At this time, it is in stage three. When it is necessary to remove the balance support structure, the screw 20 can be rotated in the reverse direction, which should be understandable to those skilled in the art.

[0052] In this embodiment, the upper end of the screw 20 protrudes from the embedded pipe 8. A through hole 31 is provided in the upper end of the screw 20 along its radial direction. A rotating support rod 32 is installed in the through hole 31, which can facilitate the control of the rotation of the screw 20. The rotating support rod 32 is short enough to rotate within the embedded pipe 8 to avoid interference.

[0053] In this embodiment, the support frame 9 includes a plurality of cross bars 33 evenly spaced along the longitudinal direction, and longitudinal bars 34 connecting the cross bars 33 together. First sliding holes 35 and second sliding holes 36 are respectively formed in the two ends of the cross bar 33 along the vertical direction. A first support column 37 and a second support column 38 are respectively and slidably inserted into the first sliding hole 35 and the second sliding hole 36. The first support column 37 and the second support column 38 are fixed to the cross bar 33 through a locking member 39. By providing the first support column 37 and the second support column 38, the support heights on both sides of the support frame 9 can also be adjusted to meet the needs of different height differences of precast cantilever beams.

[0054] A third sliding hole 40 for the embedded pipe 8 to pass through is formed in the middle of the cross bar 33 along the vertical direction. The embedded pipe 8 is fixed to the cross bar 33 through a locking member 39. A fourth sliding hole 41 for the longitudinal bar 34 to pass through is formed in the side surface of the cross bar 33 along the longitudinal direction. An opening groove 42 is formed in the longitudinal bar 34 along the longitudinal direction. The two ends of the opening groove 42 are respectively connected with a first limiting screw 43 and a second limiting screw 44. The first limiting screw 43 and the second limiting screw 44 are used to limit the cross bar 33. By providing the first limiting screw 43 and the second limiting screw 44, the limiting position of the cross bar 33 can be adjusted to facilitate the installation between the cross bar 33 and the main trunk, meet the needs of manufacturing errors between the bars, and also facilitate subsequent disassembly to facilitate the turnover of the formwork and the support frame 9.

[0055] In order to ensure the constant temperature of the concrete after pouring and reduce the problems of concrete hollowness or cracking, the present invention also evenly arranges a plurality of heating wires 45 along the length direction at the bottom of the bottom formwork 5, and correspondingly installs temperature sensors 46 at the bottom. Each temperature sensor 46 is used to measure the temperature at the bottom of the concrete. When the temperature monitored by a certain temperature sensor 46 is significantly lower than that of the other temperature sensors 46, the heating wire 45 at this place is started to work to raise it to the same temperature level to ensure the constant temperature of the concrete after pouring.

[0056] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A standardized formwork support system for precast cantilever beams. The precast cantilever beam includes a cantilever beam body, an upper wing plate and a lower wing plate arranged on both sides of the cantilever beam body. The upper wing plate and the lower wing plate of the adjacent cantilever beam body are connected by a cast-in-place section. The formwork support system is used to support the cast-in-place section, and is characterized in that: The template support system includes a bottom template, adjustable side templates installed on both sides of the bottom template, and end templates located at both ends of the bottom template. A pre-embedded pipe is connected to the middle of the upper surface of the bottom template, and the upper end of the pre-embedded pipe extends upward and is connected to a support frame. The support frame and the bottom template are respectively located on the upper and lower sides of the cast-in-place section. The adjustable side template includes a base, a telescopic plate, an elastic support device, and an elastic shrinkage sealing plate. The base is fixed on the side of the bottom template, a limiting groove is provided on the upper side surface of the base, the opening of the limiting groove is closed by the elastic shrinkage sealing plate, a plurality of shrinkage holes are arranged in an array along the length direction of the bottom template on the elastic shrinkage sealing plate, a telescopic plate is correspondingly installed in each shrinkage hole, two adjacent telescopic plates are closely adjacent to each other, the telescopic plate is in sealing cooperation with the shrinkage hole and the telescopic plate can slide vertically in the shrinkage hole, and the bottom of the telescopic plate is connected to the bottom of the limiting groove through the elastic support device. The opening of the limiting groove is in a trapezoidal structure that gradually becomes smaller from the inner side to the outer side of the base. The two telescopic plates located at both ends of the limiting groove respectively correspond to the two side edges of the trapezoidal opening, and the inner wall of the shrinkage hole is always in close contact with the outer wall of the telescopic plate. A plurality of elastic sealing blocks are arranged between two adjacent telescopic plates, the elastic sealing blocks are arranged at equal intervals vertically, and a strip-shaped vertical groove for installing the elastic sealing blocks is provided on the side surface of the telescopic plate. An installation seat is fixed on the side surface of the upper end of the pre-embedded pipe, a threaded hole is provided on the installation seat, and a suspension rod is threadedly connected in the threaded hole. A plurality of limiting cylinders are arranged at equal intervals along the longitudinal direction of the bottom template at the bottom of the bottom template, and the upper end of the limiting cylinder is communicated with the pre-embedded pipe. A balance support structure is arranged in the limiting cylinder, and the balance support structure includes a screw rod, a first limiting plate, a second limiting plate, a first pin shaft, a second pin shaft, a first support, a first connecting rod, and a second connecting rod. The rotation planes of the first connecting rod and the second connecting rod are in the same plane and perpendicular to the plane where the bottom template is located. One end of the first connecting rod is pivotally connected to the first pin shaft, and the other end is pivotally connected to the first support. One end of the second connecting rod is pivotally connected to the first support, and the other end is pivotally connected to the second pin shaft. The first connecting rod and the second connecting rod are located on the same side of the screw rod, and a first opening for the first connecting rod and the second connecting rod to extend out is correspondingly provided on the side surface of the limiting cylinder. A through hole is provided along the radial direction of the first pin shaft, and a threaded hole is provided along the radial direction of the second pin shaft. The screw rod passes through the through hole on the first pin shaft and is threadedly connected to the threaded hole on the second pin shaft. The first limiting plate and the second limiting plate are fixedly spaced apart in the middle of the screw rod, and the first limiting plate and the second limiting plate are used to limit the first pin shaft.

2. The standardized formwork support system for precast cantilever beams according to claim 1, characterized in that: The balance support structure further includes a third connecting rod, a second support and a fourth connecting rod. One end of the third connecting rod is pivotally connected to the first pin shaft, and the other end is pivotally connected to the second support. One end of the fourth connecting rod is pivotally connected to the second support, and the other end is pivotally connected to the second pin shaft. The third connecting rod and the fourth connecting rod are located on the same side of the screw rod. The first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are combined to form a parallelogram structure. A second opening for the third connecting rod and the fourth connecting rod to extend out is formed in the other side surface of the limiting cylinder.

3. The standardized formwork support system for precast cantilever beams according to claim 1, characterized in that: The upper end of the screw rod extends out of the embedded pipe. A through hole is formed in the upper end of the screw rod along its radial direction, and a rotating support rod is installed in the through hole.

4. The standardized formwork support system for precast cantilever beams according to claim 1, characterized in that: The support frame includes a plurality of cross bars uniformly arranged at intervals along the longitudinal direction and longitudinal bars connecting the cross bars. First sliding holes and second sliding holes are respectively formed in the two ends of the cross bar along the vertical direction. A first support pillar and a second support pillar are respectively slidably penetrated in the first sliding hole and the second sliding hole. The first support pillar and the second support pillar are fixed to the cross bar through locking pieces. A third sliding hole for the embedded pipe to pass through is formed in the middle of the cross bar along the vertical direction. The embedded pipe is fixed to the cross bar through a locking piece.

5. The standardized formwork support system for precast cantilever beams according to claim 4, characterized in that: A fourth sliding hole for the longitudinal bar to pass through is formed in the side surface of the cross bar along the longitudinal direction. An opening groove is formed in the longitudinal bar along the longitudinal direction. The two ends of the opening groove are respectively connected with a first limiting screw rod and a second limiting screw rod. The first limiting screw rod and the second limiting screw rod are used for limiting the cross bar.

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