A flange slab formwork system for elevated cast-in-place box beams

Abstract

The present application relates to a formwork system for flange plates of elevated cast-in-place box beams, and relates to the field of bridge engineering, which includes a box beam body erected at a supporting steel frame, the box beam body including an integrally formed web, support plate, cantilever plate and bottom plate, a formwork system is arranged on the supporting steel frame, the formwork system includes a connecting piece, a movable sleeve rod, a lifting rod, a support plate and a cantilever support plate, the cantilever support plate is fitted with the cantilever plate inclined surface, the movable sleeve rod is connected to the connecting piece, the lifting rod is inserted into the movable sleeve rod, the lifting rod is threadedly connected to the movable sleeve rod, and one end of the lifting rod away from the connecting piece is rotatably connected to the support plate. The present application has the effect of providing stable support for cantilever plates at different angles.

Description

Technical Field

[0001] The present application relates to the field of bridge engineering, and in particular to an elevated cast-in-place box girder flange plate formwork system. Background Art

[0002] Box girder is a commonly used structure for large-span bridges. It is a type of beam that is hollow inside and has flanges on both sides of the upper part, similar to a box, hence the name.

[0003] A Chinese patent with announcement number CN106758821A discloses a method for supporting the side formwork of a cast-in-place box girder and a box girder formwork supporting device used therein. An I-beam supported on a bracket is arranged under the bottom formwork of the box girder. A box girder formwork supporting device is used on both sides of the box girder web to connect and fix the I-beam to symmetrically support the side formwork of the box girder; and the bottom formwork of the box girder flange plate is supported by vertical support rods erected on the I-beam.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the bottom surface of the flange plate of the box girder is generally inclined, so it is difficult to support the formwork relative to the horizontal plane. When the angle of the flange plate changes due to construction requirements, it is difficult to support the flange plate well, and the stability of the flange plate is difficult to improve. Summary of the invention

[0005] In order to improve the difficulty of adjusting cantilever beam slabs at different angles, the present application provides an elevated cast-in-place box beam flange slab formwork system.

[0006] The present application provides an elevated cast-in-place box girder flange slab formwork system that adopts the following technical solution:

[0007] A formwork system for flange plates of an elevated cast-in-place box girder comprises a box girder body erected on a supporting steel frame, the box girder body comprising an integrally formed web, support plate, cantilever plate and bottom plate, the supporting steel frame being provided with a formwork system, the formwork system comprising a connecting piece, a movable sleeve rod, a lifting rod, a support plate and a cantilever support plate, the cantilever support plate being fitted with an inclined surface of the cantilever plate, the movable sleeve rod being connected to the connecting piece, the lifting rod being inserted into the movable sleeve rod, the lifting rod being threadedly connected to the movable sleeve rod, and the lifting rod having an end of the lifting rod away from the connecting piece being rotatably connected to the support plate.

[0008] By adopting the above technical solution, a formwork system is arranged on the supporting steel frame. The height of the lifting rod can be adjusted by rotating the lifting rod, and then the support plate rotatably connected to the lifting rod supports the cantilever support plate, so that the formwork system can support cantilever support plates at different angles, further improving the stability of the cantilever plate.

[0009] Preferably, the connecting member includes a base plate, a side support plate, a first adjusting rod and a second adjusting rod, the base plate is mounted on a supporting steel frame, the side support plate is fitted with the web, the base plate is connected to the side support plate and mounted on the supporting steel frame, a sliding groove is provided on the surface of the base plate, the movable sleeve rod is inserted in the sliding groove, and the movable sleeve rod can slide along the length direction of the sliding groove; one end of the first adjusting rod is connected to the side support plate, an adjusting groove is provided at an end of the first adjusting rod away from the side support plate, the second adjusting rod is inserted in the adjusting groove, the second adjusting rod can slide along the length direction of the adjusting groove, and the end of the second adjusting rod away from the side support plate is connected to the movable sleeve rod.

[0010] By adopting the above technical solution, after pulling the second adjusting rod, the movable sleeve rod can be moved along the sliding groove, so that the support plate can support different positions. When the angle of the cantilever plate changes, the length of the cantilever plate may also change accordingly, and the supporting position of the cantilever support plate can be adjusted so that the support plate can accurately support the cantilever support plate, thereby further improving the stability of the cantilever plate.

[0011] Preferably, a positioning hole is provided on the surface of the first adjusting rod, a positioning groove matched with the positioning hole is provided on the surface of the second adjusting rod, a locking column is inserted in the positioning hole, and the locking column is inserted in the positioning groove and matched with the inner wall thread of the positioning groove.

[0012] By adopting the above technical solution, after the positions of the first adjusting rod and the second adjusting rod are adjusted, the locking column is inserted into the positioning hole of the first adjusting rod and into the positioning groove of the second adjusting rod, and then the locking column is threadedly connected to the second adjusting rod, so that the first adjusting rod and the second adjusting rod can be fixed to reduce the relative sliding phenomenon between the first adjusting rod and the second adjusting rod, thereby improving the stability of the formwork system.

[0013] Preferably, the cantilever support plate is provided with a receiving groove, a growth plate is inserted into the receiving groove, the growth plate can slide in the receiving groove, and the surface of the growth plate is in contact with the cantilever plate.

[0014] By adopting the above technical solution, after pulling out the growth plate in the accommodating groove, the growth plate can support cantilever plates of different lengths to improve the support stability of the cantilever plates, thereby reducing the occurrence of the cantilever plate hanging in the air after the angle of the cantilever plate is changed, thereby improving the support stability of the cantilever plate by the formwork system.

[0015] Preferably, a stabilizing rope is provided at one end of the growth plate away from the web, and the stabilizing rope is buckled and connected to the supporting steel frame.

[0016] By adopting the above technical solution, after the length of the growth plate is adjusted, the stabilizing rope is fastened to the supporting steel frame, so that the position of the growth plate can be fixed, reducing the phenomenon of the growth plate sliding back into the receiving groove due to subsequent construction, thereby improving the support stability of the cantilever plate.

[0017] Preferably, a fixed sleeve rod is provided on the surface of the support plate, an auxiliary extension rod is inserted in the fixed sleeve rod, the upper end of the auxiliary extension rod is rotatably connected to an auxiliary plate, and the end of the auxiliary plate away from the auxiliary extension rod can be fitted with the cantilever support plate; a driving member for driving the auxiliary extension rod to rise and fall is provided on the bottom plate.

[0018] By adopting the above technical solution, when the movable sleeve slides to the end away from the side support plate, the cantilever support plate is difficult to be supported near the web. After the auxiliary extension rod is slid by the driving member, the auxiliary plate rotatably connected to the auxiliary extension rod can be attached to and supported by the cantilever support plate, so that multiple points of the cantilever support plate are supported, thereby improving the stability of the cantilever plate.

[0019] Preferably, the driving member includes an active bevel gear, a driven bevel gear, a first rotating rod, a second rotating rod, a first connecting gear, a second connecting gear, a first connecting rack and a second connecting rack, the first connecting rack is connected to the second adjusting rod, the first connecting gear is meshed with the first connecting rack, the first rotating rod is rotatably connected to the base plate, the first rotating rod passes through the first connecting gear, the active bevel gear is sleeved on the first rotating rod, the driven bevel gear is meshed with the active bevel gear, the second rotating rod is connected to the driven bevel gear, the end of the second rotating rod away from the driven bevel gear is connected to the second connecting gear, the second connecting rack is connected to the auxiliary extension rod, the second connecting rack is arranged along the length of the auxiliary extension rod, and the second connecting gear is meshed with the second connecting rack.

[0020] By adopting the above technical solution, when the second adjusting rod is pulled, the first connecting rack located at the second adjusting rod drives the first connecting gear to rotate, so that the active bevel gear drives the driven bevel gear to rotate. At this time, the second rotating rod rotates, causing the second connecting gear to rotate, and drives the second connecting rack connected to the auxiliary extension rod to rise or fall, so that the auxiliary plate rotatably connected to the auxiliary extension rod can support the cantilever support plate in time, thereby improving the stability of the cantilever support plate.

[0021] Preferably, a fixing groove is provided at one end of the cantilever support plate away from the cantilever plate, and the auxiliary plate can be inserted in the fixing groove. A stabilizing groove is provided on the cantilever support plate, and the stabilizing groove is communicated with the fixing groove. A positioning plate is inserted in the stabilizing groove, and the positioning plate is slidably connected to the inner wall of the stabilizing groove. The positioning plate can fit together with a side of the auxiliary plate close to the auxiliary extension rod.

[0022] By adopting the above technical solution, when the auxiliary plate rises, it can be inserted into the fixed groove, and then the positioning plate in the stabilizing groove is pulled out so that the surface of the positioning plate fits with the auxiliary plate, thereby supporting the auxiliary plate to reduce the rotation of the auxiliary plate, further improving the stability of the auxiliary plate, and thus improving the stability of the cantilever plate.

[0023] Preferably, an elastic member is provided in the stabilizing groove, one end of the elastic member is connected to the end wall of the stabilizing groove, and the other end of the elastic member is connected to the positioning plate.

[0024] By adopting the above technical solution and the setting of the elastic part, after the auxiliary plate is inserted into the fixing groove, the fixing plate can be tightly fitted to the lower surface of the auxiliary plate, thereby reducing the phenomenon of the fixing plate sliding back into the stabilizing groove during subsequent construction, further improving the stability of the fixing plate, and thus improving the supporting stability of the auxiliary plate on the cantilever support plate.

[0025] Preferably, a guide surface is provided at one end of the positioning plate away from the elastic member.

[0026] By adopting the above technical solution and setting of the guide surface, the auxiliary plate can be smoothly inserted into the fixing groove after rising, thereby improving the convenience of inserting the auxiliary plate into the fixing groove.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. A formwork system is provided at the supporting steel frame. By rotating the lifting rod, the supporting plate rotatably connected to the lifting plate can be attached to and support the cantilever support plates at different angles, thereby improving the support stability of the cantilever plates at different angles and the stability of the entire box girder body;

[0029] 2. The position of the movable sleeve rod can be changed through the first adjusting rod and the second adjusting rod, so that the movable sleeve rod supports the cantilever support plate at different positions, thereby improving the support stability of the cantilever support plate;

[0030] 3. The fixed sleeve rod and the extension rod are set, so that the fixed sleeve rod can support the cantilever liner in time, thereby further improving the support stability of the cantilever plate by the formwork system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is an overall schematic diagram of an elevated cast-in-place box girder flange plate formwork system according to an embodiment of the present application.

[0032] Figure 2 yes Figure 1 Enlarged schematic diagram of part A in the middle.

[0033] Figure 3It is a partial cross-sectional schematic diagram used to reflect the connection relationship between the formwork system and the box girder body.

[0034] Figure 4 It is a cross-sectional schematic diagram used to reflect the connection relationship between the box girder body and the formwork system.

[0035] Figure 5 It is a schematic diagram used to reflect the connection relationship between the formwork system and the supporting steel frame.

[0036] Figure 6 yes Figure 4 Enlarged schematic diagram of part B in the middle.

[0037] Description of reference numerals:

[0038] 1. Support steel frame; 2. Box girder body; 21. Web plate; 22. Support plate; 23. Cantilever plate; 24. Bottom plate; 3. Formwork system; 31. Connector; 311. Bottom plate; 3111. Sliding groove; 312. Side support plate; 313. First adjustment rod; 3133. Adjustment groove; 3132. Positioning hole; 314. Second adjustment rod; 3141. Positioning groove; 3142. Locking column; 32. Moving sleeve rod; 33. Lifting rod; 34. Support plate; 35. Cantilever support plate; 351. Accommodating groove; 352, fixing groove; 353, stabilizing groove; 354, growth plate; 3541, stabilizing rope; 355, positioning plate; 3551, guide surface; 356, elastic member; 36, fixing sleeve rod; 37, auxiliary extension rod; 371, auxiliary plate; 4, driving member; 41, active bevel gear; 42, driven bevel gear; 43, first rotating rod; 44, second rotating rod; 441, connecting plate; 45, first connecting gear; 46, second connecting gear; 47, first connecting rack; 48, second connecting rack. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-6 This application is described in further detail.

[0040] The present application embodiment discloses a flange plate formwork system for an elevated cast-in-place box girder. Figure 1 and Figure 2A formwork system for an elevated cast-in-place box girder flange plate includes a box girder body 2 erected on a supporting steel frame 1, the supporting steel frame 1 is fixed to the ground by anchor bolts, the box girder body 2 includes an integrally formed web 21, a support plate 22, a cantilever plate 23 and a bottom plate 24, the web 21 is located on both sides of a bottom plate 311, the support plate 22 and the bottom plate 311 are parallel to each other, and the cantilever plate 23 is located on both sides of the support plate 22; a formwork system 3 is installed below the cantilever plate 23, and the formwork system 3 is erected at the supporting steel frame 1. The formwork system 3 includes a connecting member 31, a movable sleeve rod 32, a lifting rod 33, a support plate 34 and a cantilever support plate 35. The cantilever support plate 35 is fitted with the cantilever plate 23. The connecting member 31 is mounted on the supporting steel frame 1. The movable sleeve rod 32 is connected to the connecting member 31. The lifting rod 33 is inserted into the movable sleeve rod 32. The outer wall of the lifting rod 33 is threadedly adapted to the inner wall of the movable sleeve rod 32. The lifting rod 33 and the movable sleeve rod 32 are both arranged along the height of the box girder body 2. The end of the lifting rod 33 away from the connecting member 31 is rotatably connected to the support plate 34 through a rotating shaft. The support plate 34 can fit with a side of the cantilever support plate 35 away from the cantilever plate 23, thereby supporting the cantilever plates 23 with different degrees of inclination.

[0041] Reference Figure 1 , Figure 2 and Figure 3 The connecting member 31 includes a connecting bottom plate 311, a side support plate 312, a first adjustment rod 313 and a second adjustment rod 314. The connecting bottom plate 311 is supported on the supporting steel frame 1, the side support plate 312 is in contact with the side wall of the web 21, the side support plate 312 and the connecting bottom plate 311 are perpendicular to each other, the side support plate 312 and the connecting bottom plate 311 are welded and fixed, the first adjustment rod 313 and the side support plate 312 are welded and fixed, the first adjustment rod 313 and the connecting bottom plate 311 are parallel to each other, the first adjustment rod 313 is a rectangular rod, the first adjustment rod 313 is provided with an adjustment groove 3133 along its length direction, the second adjustment rod 314 is inserted into the adjustment groove 3133, and the second adjustment rod 314 can slide along the length direction of the adjustment groove 3133; the upper surface of the bottom plate 311 is provided with a sliding groove 3111, the sliding groove 3111 is opened along the width direction of the box beam body 2, and the movable sleeve rod 32 is inserted in the sliding groove 3111, and the movable sleeve rod 32 can slide along the length direction of the sliding groove 3111; a positioning hole 3132 is opened on the surface of the first adjusting rod 313, and a plurality of positioning holes 3132 are spaced apart along the length direction of the first adjusting rod 313; a positioning groove 3141 adapted to the positioning hole 3132 is opened on the surface of the second adjusting rod 314, and a locking column 3142 is inserted in the positioning hole 3132, and the locking column 3142 penetrates the positioning hole 3132 and is threadedly adapted to the adjusting groove 3133 of the second adjusting rod 314, so that the first adjusting rod 313 and the second adjusting rod 314 can be fixed; the end of the second adjusting rod 314 away from the side support plate 312 is welded and fixed to the movable sleeve rod 32.

[0042] Reference Figure 2 , Figure 3 and Figure 4 A fixed sleeve rod 36 is welded and fixed on the surface of the bottom plate 311, and an auxiliary extension rod 37 is inserted in the fixed sleeve rod 36. A driving member 4 for adjusting the length of the auxiliary extension rod 37 is provided on the surface of the bottom plate 311. The driving member 4 includes an active bevel gear 41, a driven bevel gear 42, a first rotating rod 43, a second rotating rod 44, a first connecting gear 45, a second connecting gear 46, a first connecting rack 47 and a second connecting rack 48. The first connecting rack 47 is welded and fixed to the side wall of the second adjusting rod 314. A connecting rack 47 is arranged along the length direction of the second adjusting rod 314, the side wall of the first connecting rack 47 is meshed with the first connecting gear 45, the first rotating rod 43 is penetrated by the first connecting gear 45, the first rotating rod 43 is connected to the bottom plate 311 with a bearing, the first rotating rod 43 is welded and fixed to the first connecting gear 45, the active bevel gear 41 is sleeved on the first rotating rod 43 and welded and fixed to the first rotating rod 43, the active bevel gear 41 is located above the first connecting gear 45, the driven bevel gear 42 is meshed with the active bevel gear 41, the second rotating rod 44 is welded and fixed to the driven bevel gear 42, a connecting plate 441 for fixing the second rotating rod 44 is welded on the surface of the bottom plate 311, the second rotating rod 44 is rotatably connected with the connecting plate 441, the end of the second rotating rod 44 away from the driven bevel gear 42 is welded and fixed to the second connecting gear 46, the side wall of the auxiliary extension rod 37 is welded and fixed to the second connecting rack 48, the second connecting rack 48 is arranged along the length direction of the auxiliary extension rod 37, and the second connecting gear 46 is meshed with the second connecting rack 48; the end of the auxiliary extension rod 37 away from the bottom plate 311 is connected to the auxiliary plate 371 through a rotating shaft. In the embodiment of the present application, the auxiliary plate 371 is a rectangular plate. When the auxiliary extension rod 37 rises, the angle of the auxiliary plate 371 is adjusted so that the auxiliary plate 371 and the cantilever support plate 35 fit each other. When the second adjusting rod 314 is pulled, the adjusting member causes the auxiliary extension rod 37 to rise, thereby supporting the cantilever plate 23, thereby further improving the stability of the cantilever plate 23.

[0043] Reference Figure 3 and Figure 5 A receiving groove 351 is provided on the surface of the cantilever support plate 35, and the receiving groove 351 is provided along the width direction of the box beam body 2. An extension plate 354 is inserted in the receiving groove 351, and the extension plate 354 can slide along the length direction of the receiving groove 351. The upper surface of the extension plate 354 is in contact with the lower surface of the cantilever plate 23, and one end of the extension plate 354 away from the end wall of the receiving groove 351 is pre-embedded and fixed with a stabilizing rope 3541 by screws, and the end of the stabilizing rope 3541 away from the extension plate 354 is buckled and connected to the supporting steel frame 1, thereby improving the stability of the extension plate 354 and further improving the stability of the cantilever plate 23.

[0044] Reference Figure 4 and Figure 6 A fixing groove 352 is provided on the lower surface of the cantilever support plate 35, and the fixing groove 352 is provided along the thickness direction of the cantilever support plate 35. After the auxiliary extension rod 37 rises, the auxiliary plate 371 can be inserted into the fixing groove 352; a stabilizing groove 353 is provided in the cantilever support plate 35. In the embodiment of the present application, each cantilever support plate 35 is provided with 4 stabilizing grooves 353, which are connected to the fixing groove 352. A positioning plate 355 is inserted in the stabilizing groove 353. The positioning plate 355 can slide along the length direction of the stabilizing groove 353 and slide to the fixing groove 352. When the auxiliary plate 371 is inserted into the fixing groove 352, the positioning plate 355 is slid so that the surface of the positioning plate 355 is against the bottom surface of the auxiliary plate 371, thereby supporting the auxiliary plate 371 and improving the stability of the auxiliary plate 371.

[0045] Reference Figure 6 An elastic member 356 is inserted into the stable groove 353. In the embodiment of the present application, the elastic member 356 is a spring. One end of the elastic member 356 is fixed to the end wall of the stable groove 353 by gluing, and the other end of the elastic member 356 is fixed to the positioning plate 355. A guide surface 3551 is provided at one end of the fixing plate away from the elastic member 356, thereby facilitating the insertion of the auxiliary plate 371 into the stable groove 353, further improving the stability of the auxiliary plate 371.

[0046] The implementation principle of the elevated cast-in-place box girder flange plate formwork system of the embodiment of the present application is: after sliding the second adjusting rod 314, the locking column 3142 is inserted into the positioning hole 3132 and the positioning groove 3141, and then the locking column 3142 is rotated so that the locking column 3142 is threadedly connected to the second adjusting rod 314, thereby adjusting the position of the second adjusting rod 314, and then the lifting rod 33 is rotated so that the support plate 34 of the lifting rod 33 supports the cantilever support plate 35 at different angles to improve the stability of the cantilever support plate 35.

[0047] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. Through the above description, relevant staff can make various changes and modifications without departing from the technical idea of ​​the present application. Therefore, all equivalent changes made to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An elevated cast-in-place box girder flange plate formwork system, comprising a box girder body (2) erected on a supporting steel frame (1), wherein the box girder body (2) comprises an integrally formed web plate (21), a support plate (22), a cantilever plate (23) and a bottom plate (24), characterized in that: The supporting steel frame (1) is provided with a formwork system (3), and the formwork system (3) comprises a connecting piece (31), a movable sleeve rod (32), a lifting rod (33), a support plate (34) and a cantilever support plate (35), wherein the cantilever support plate (35) is in contact with the cantilever plate (23) at an inclined surface, the movable sleeve rod (32) is connected to the connecting piece (31), the lifting rod (33) is inserted into the movable sleeve rod (32), the lifting rod (33) is threadedly connected to the movable sleeve rod (32), and one end of the lifting rod (33) away from the connecting piece (31) is rotatably connected to the support plate (34); The connecting member (31) comprises a bottom plate (311), a side support plate (312), a first adjustment rod (313) and a second adjustment rod (314); the bottom plate (311) is mounted on the supporting steel frame (1); the side support plate (312) is fitted with the web (21); the bottom plate (311) and the side support plate (312) are connected and mounted on the supporting steel frame (1); a sliding groove (3111) is provided on the surface of the bottom plate (311); the movable sleeve rod (32) is inserted into the sliding groove (3111); the movable sleeve rod (32 ) can slide along the length direction of the sliding groove (3111); one end of the first adjusting rod (313) is connected to the side support plate (312), and an adjusting groove (3133) is provided at one end of the first adjusting rod (313) away from the side support plate (312); the second adjusting rod (314) is inserted into the adjusting groove (3133), and the second adjusting rod (314) can slide along the length direction of the adjusting groove (3133); one end of the second adjusting rod (314) away from the side support plate (312) is connected to the movable sleeve rod (32); A positioning hole (3132) is provided on the surface of the first adjusting rod (313), a positioning groove (3141) adapted to the positioning hole (3132) is provided on the surface of the second adjusting rod (314), a locking column (3142) is inserted into the positioning hole (3132), and the locking column (3142) is inserted into the positioning groove (3141) and adapted to the inner wall thread of the positioning groove (3141); The surface of the bottom plate (311) is provided with a fixed sleeve rod (36), an auxiliary extension rod (37) is inserted in the fixed sleeve rod (36), the upper end of the auxiliary extension rod (37) is rotatably connected to an auxiliary plate (371), and the end of the auxiliary plate (371) away from the auxiliary extension rod (37) can be in contact with the cantilever support plate (35); the bottom plate (311) is provided with a driving member (4) for driving the auxiliary extension rod (37) to rise and fall; The driving member (4) comprises an active bevel gear (41), a driven bevel gear (42), a first rotating rod (43), a second rotating rod (44), a first connecting gear (45), a second connecting gear (46), a first connecting rack (47) and a second connecting rack (48); the first connecting rack (47) is connected to the second adjusting rod (314); the first connecting gear (45) is meshed with the first connecting rack (47); the first rotating rod (43) is rotatably connected to the bottom plate (311); the first rotating rod (43) is provided with the first connecting gear (45) ), the active bevel gear (41) is sleeved on the first rotating rod (43), the driven bevel gear (42) is meshed with the active bevel gear (41), the second rotating rod (44) is connected to the driven bevel gear (42), the end of the second rotating rod (44) away from the driven bevel gear (42) is connected to the second connecting gear (46), the second connecting rack (48) is connected to the auxiliary extension rod (37), the second connecting rack (48) is arranged along the length of the auxiliary extension rod (37), and the second connecting gear (46) is meshed with the second connecting rack (48).

2. The elevated cast-in-place box girder flange plate formwork system according to claim 1, characterized in that: The cantilever support plate (35) is provided with a receiving groove (351), a growth plate (354) is inserted into the receiving groove (351), the growth plate (354) can slide in the receiving groove (351), and the surface of the growth plate (354) is in contact with the cantilever plate (23).

3. The elevated cast-in-situ box girder flange plate formwork system according to claim 2, characterized in that: A stabilizing rope (3541) is provided at one end of the growth plate (354) away from the web plate (21), and the stabilizing rope (3541) is buckled and connected to the supporting steel frame (1).

4. The elevated cast-in-situ box girder flange plate formwork system according to claim 1, characterized in that: The cantilever support plate (35) is provided with a fixing groove (352) at one end away from the cantilever plate (23), and the auxiliary plate (371) can be inserted into the fixing groove (352). The cantilever support plate (35) is provided with a stabilizing groove (353), and the stabilizing groove (353) is communicated with the fixing groove (352). A positioning plate (355) is inserted in the stabilizing groove (353), and the positioning plate (355) is slidably connected to the inner wall of the stabilizing groove (353). The positioning plate (355) can fit with a side of the auxiliary plate (371) close to the auxiliary extension rod (37).

5. The elevated cast-in-situ box girder flange plate formwork system according to claim 4, characterized in that: An elastic member (356) is provided in the stabilizing groove (353), one end of the elastic member (356) is connected to the end wall of the stabilizing groove (353), and the other end of the elastic member (356) is connected to the positioning plate (355).

6. The elevated cast-in-situ box girder flange plate formwork system according to claim 4, characterized in that: A guide surface (3551) is provided at one end of the positioning plate (355) away from the elastic member (356).

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