Movable support for inner mold of special-shaped box girder of swivel bridge

Abstract

A movable support for a special-shaped box girder inner mold of a swivel bridge comprises stand columns which are densely and vertically arranged in side holes of a special-shaped box girder at equal intervals, the upper ends of the stand columns are sequentially supported on square timber on the surface of the special-shaped box girder inner mold, and the lengths of the stand columns close to the inclined side faces of the side holes are sequentially reduced to form a step shape. Horizontal supporting plates are sequentially arranged on the stand columns with the lengths sequentially reduced, a plurality of round disc buckles are arranged on the stand columns at equal intervals, the horizontal supporting plates are connected with the round disc buckles at the corresponding positions, inclined supporting rods are arranged between the outer ends of the horizontal supporting plates and the round disc buckles below, and the lower ends of the stand columns arranged in a stepped mode are sequentially supported on the horizontal supporting plates. A connecting piece is arranged between the adjacent circular disc openings in the same horizontal plane; according to the formwork support, the stand column on the inclined side face is supported through improvement of the structure of the formwork support, the stand column does not need to be supported on the inclined formwork on the inclined side wall any more, stability is high, good supporting can be provided for the top formwork, and the overall pouring quality of the special-shaped box girder is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of box girder construction, in particular to a movable support for the internal mold of a special-shaped box girder of a rotating bridge. Background Technique

[0002] A box girder refers to a structure formed by cast-in-place concrete at the construction site to form a box-shaped beam body. It generally includes a bottom plate, side plates and a top plate of the box body, with a cavity inside, forming a relatively closed box-shaped structure, and the cavity inside runs through the entire beam body. The number of cavities can be one or multiple.

[0003] The cavity inside the box girder of the rotating bridge in the box girder structure is usually a special-shaped structure to maximize the bending, shear and compressive properties of the material. In order to make the inclined side wall of the cavity form smoothly, a layered pouring construction method is generally used for on-site pouring. The problem in the on-site pouring process is that since the side wall of the special-shaped box girder is inclined, the lower end of the upright column of the scaffolding system at the position corresponding to the inclined side wall in the cavity cannot be supported on the horizontal bottom plate and is supported on the inclined formwork of the inclined side wall. This arrangement of upright columns cannot form a stable support, so the support effect on the top formwork is not good, resulting in the phenomenon of form bulging and leakage of materials. Moreover, after a section of box girder is poured, the entire scaffolding system needs to be removed and moved to the next section for construction. The disassembly and assembly project is rather troublesome, affecting the construction efficiency. Content of the Utility Model

[0004] In order to solve the above problems, the utility model proposes a movable support for the internal mold of a special-shaped box girder of a rotating bridge.

[0005] The technical solution of the utility model is: a movable support for the internal mold of a special-shaped box girder of a rotating bridge, including steel pipe upright columns vertically arranged at equal intervals densely in the side holes of the special-shaped box girder. The outer side surface of the steel pipe upright columns is provided with a galvanized layer. The upper ends of the upright columns are successively supported on the square timbers on the surface of the internal mold of the box girder. The square timbers are arranged along the width direction of the box girder. Among them, the lengths of the upright columns near the inclined side surface of the side hole are successively reduced to form a stepped shape. The inclination of this stepped shape is the same as the inclination of the inclined side surface of the box girder. Horizontal support plates are successively arranged on these upright columns with gradually decreasing lengths. A number of circular disk fasteners are arranged at equal intervals on the upright columns. The circular disk fasteners and the upright columns are coaxially arranged. The horizontal support plates are connected to the circular disk fasteners at the corresponding positions. An inclined strut is arranged between the outer end of the horizontal support plate and the circular disk fastener below. This inclined strut is in the shape of a long sheet. The lower ends of the stepped upright columns are successively supported on the horizontal support plates. Connecting pieces are arranged between adjacent circular disk fasteners on the same horizontal plane, and a square mesh structure is formed between these connecting pieces.

[0006] Preferably, the lower end of the upright column is arranged on a mobile trolley, and rollers are arranged on both sides of the bottom surface of the mobile trolley.

[0007] Preferably, tracks are provided along the length direction on both sides of the bottom plate of the internal formwork of the box girder. During construction, the tracks are designed as multi-section structures that are butt-jointed with each other, and the rollers on both sides of the moving trolley are fitted and clamped into the tracks.

[0008] Preferably, the upper end of the inclined strut is provided with an L-shaped chuck, the lower end is provided with a bent card, and a folded plate is provided on the outer edge of the horizontal support plate. A square hole is provided on the folded plate. After the L-shaped chuck is inserted into the square hole, there is still a certain amount of movement space. The L-shaped chuck is clamped into the square hole, and the bent card is vertically clamped into the socket hole on the circular disc buckle.

[0009] Preferably, the connecting member is a steel pipe, and a pin piece is provided at the end of the steel pipe. The pin piece is a trapezoidal sheet structure, and the steel pipe is connected to the socket hole on the circular disc buckle through the pin piece.

[0010] Preferably, a clamping groove is provided at the outer end of the connecting member. The clamping groove penetrates through the end face of the connecting member outward, and a radial hole is provided in the middle of the clamping groove. A pin shaft is inserted between the radial hole and the through hole in the middle of the pin piece.

[0011] Preferably, a lifting rod is threadedly connected to the upper end of the column. The lifting rod is a hollow screw rod, which is sleeved in the column through threads and can rise or fall by rotation. The upper end of the lifting rod abuts against the bottom surface of the square wood.

[0012] Preferably, a clamping plate is provided at the upper end of the lifting rod. A middle plate is provided in the middle of the clamping plate, and two limiting plates are symmetrically provided on both sides of the middle plate. The clamping plate is fitted and clamped on the square wood.

[0013] Preferably, a jacking hole is provided at the inner end of the horizontal support plate. The jacking hole corresponds to the socket hole of the circular disc buckle, and a positioning insert piece is inserted between the jacking hole and the socket hole.

[0014] The beneficial technical effects of the present utility model are:

[0015] (1) The formwork support provides support for the columns at the inclined side by improving its own structure. The columns do not need to be supported on the inclined formwork of the inclined side wall, and the stability is relatively high. It can provide good support for the top formwork and ensure the overall pouring quality of the special-shaped box girder.

[0016] (2) The formwork support is integrally arranged on the moving trolley. The moving trolley can carry the formwork support to move along a fixed route, and there is no need to demolish the support system and move it to the next section for construction, which simplifies the construction operation process and improves the pouring construction efficiency. Description of the Drawings

[0017] Figure 1 is the front view structural schematic diagram of the present utility model in the special-shaped box girder;

[0018] Figure 2It is a front view structural schematic diagram of the present utility model and the special-shaped box girder formwork;

[0019] Figure 3 It is a three-dimensional structural view of the present utility model and the special-shaped box girder formwork;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the present utility model;

[0021] Figure 5 It is Figure 4 An enlarged view of part a of

[0022] Figure 6 It is Figure 4 An enlarged view of part b of

[0023] Figure 7 It is a front view structural schematic diagram of the mobile structure of the utility model.

[0024] In the figure, 01. Special-shaped box girder, 11. Side hole, 111. Inclined side, 12. Inner formwork of box girder, 13. Square timber, 21. Column, 211. Round disk buckle, 212. Disk buckle hole, 22. Horizontal support plate, 221. Folding plate, 222. Square hole, 23. Diagonal brace, 231. L-shaped chuck, 232. Bent card, 24. Connector, 241. Card slot, 242. Pin piece, 243. Pin shaft, 31. Mobile trolley, 311. Roller, 32. Track, 41. Lifting rod, 411. Buckle plate, 51. Positioning insert. Specific embodiments

[0025] Example 1, refer to the attached drawings of the specification Figures 1-3, A mobile support for the special-shaped box girder inner form of a swivel bridge, including columns 21 vertically arranged densely and equidistantly in the side holes 11 of the special-shaped box girder 01. The columns 21 are steel pipe columns, and the upper ends of the columns 21 are successively supported on the square timbers 13 on the surface of the box girder inner form 12. Among them, the lengths of the columns 21 near the inclined side surface 111 of the side hole 11 decrease successively to form a stepped shape. The stepped-arranged columns 21 are used to adapt to the inclined side wall of the box girder and avoid conflicts with it. Horizontal support plates 22 are successively provided on these columns 21 with decreasing lengths. A number of circular socket joints 211 are equidistantly provided on the columns 21, and a number of square socket holes 212 are evenly distributed on the circular socket joints 211. The horizontal support plates 22 are connected to the circular socket joints 211 at corresponding positions. An inclined strut 23 is provided between the outer end of the horizontal support plate 22 and the circular socket joint 211 below. The inclined strut 23, the column 21, and the horizontal support plate 22 form a triangular support structure, so that the horizontal support plate 22 is in a stable support state. The lower ends of the stepped-arranged columns 21 are successively supported on the horizontal support plates 22. Connecting members 24 are provided between adjacent circular socket openings on the same horizontal plane. These connecting members 24 form a square mesh structure, and the various columns 21 are connected into one body through the mesh structure connecting member 24 structure to form an integrated support system.

[0026] A lifting rod 41 is threadedly connected to the upper end of the column 21. The upper end of the lifting rod 41 abuts against the bottom surface of the square timber 13. A clamping plate 411 is provided at the upper end of the lifting rod 41, and the clamping plate 411 is matched and clamped on the square timber 13. During use, the height of the clamping plate 411 is adjusted through the lifting rod 41 to make it tightly clamped on the square timber 13 to support the formwork.

[0027] An insertion hole is provided at the inner end of the horizontal support plate 22, and the insertion hole corresponds to the socket hole 212 of the circular socket joint 211. A positioning insert 51 is inserted between the insertion hole and the socket hole 212. The inner end of the horizontal support plate 22 is connected to the circular socket joint 211 on the column 21 through the positioning insert 51. Combined with the support of the inclined strut 23 at the outer end, the horizontal support plate 22 is kept in a horizontal and stable state.

[0028] The formwork support of this embodiment forms a plurality of stepped horizontal support plates 22 through the improvement of its own structure. These horizontal support plates 22 provide horizontal support for the stepped columns 21. The columns 21 do not need to be supported on the inclined formwork of the inclined side wall, and the stability is good. The upper ends of the columns 21 can provide good support for the top formwork, ensuring the overall pouring quality of the special-shaped box girder 01.

[0029] Embodiment 2, see the attached drawings in the specification Figures 4-6The embodiment is based on the first embodiment, and an L-shaped clamp 231 is provided at the upper end of the diagonal brace rod 23, and the L-shaped clamp 231 can produce a lateral limit effect, and a bending card 232 is provided at the lower end, and a folding plate 221 is provided on the outer edge of the horizontal support plate 22, and a square hole 222 is provided on the folding plate 221. The L-shaped clamp 231 is inserted into the square hole 222, and the bending card 232 is vertically inserted into the buckle hole 212 on the circular buckle 211. When the bracket is assembled, the bending card 232 at the lower end of the diagonal brace rod 23 is vertically inserted into the buckle hole 212, and the L-shaped clamp 231 at the upper end is inserted into the square hole 222 on the folding plate 221 to realize the diagonal brace connection of the diagonal brace rod 23. No bolts, screws or pins 242 and other connecting parts 24 are required. It is suitable for complex construction environments and is conducive to improving the assembly and connection efficiency of the bracket.

[0030] Example 3, see the attached specification Figure 6 In this embodiment, on the basis of the first embodiment, the connecting member 24 is designed as a steel tube, a pin 242 is provided at the end of the steel tube, and the steel tube is connected to the buckle hole 212 on the circular buckle 211 through the pin 242. A slot 241 is provided at the outer end of the connecting member 24. The slot 241 is located on the axis of the connecting member 24, and the slot 241 penetrates the outer end surface of the steel tube outwardly, and a radial hole is provided in the middle of the slot 241. The radial hole and the middle of the pin 242 are A pin shaft 243 is inserted between the through holes, and the pin piece 242 is locked in the slot 241 through the pin shaft 243. The pin piece 242 is connected to the circular disc buckle 211. After the pin piece 242 is pulled out, the pin piece 242 is disengaged from the slot 241 (because the slot 241 penetrates the outer end surface of the steel pipe outward). The purpose of this design is to facilitate the removal of the pin piece 242 from the slot 241, and avoid the phenomenon that the pin piece 242 is stuck in the slot 241 and is difficult to pull out.

[0031] Example 4, see the attached specification Figure 7 In this embodiment, on the basis of the first embodiment, the lower end of the column 21 in the bracket is set on a moving trolley 31. Rollers 311 are provided on both sides of the bottom surface of the moving trolley 31. Tracks 32 are provided on both sides of the bottom plate of the box beam inner mold 12 along the length direction. The direction of the track 32 is consistent with the direction of the box beam and the size matches. The rollers 311 on both sides of the moving trolley 31 are matched and inserted into the track 32. The moving trolley 31 can carry the formwork bracket to move along a fixed route on the track 32, and the construction can be carried out in sections. There is no need to dismantle the bracket system to move to the next section for construction, which simplifies the construction process and improves the efficiency of casting construction.

Claims

1. A movable bracket for inner mold of special-shaped box beam of a rotating bridge, characterized by: It includes columns that are densely and evenly spaced vertically arranged in the side holes of the special-shaped box beam, the upper ends of the columns are supported on the square wood on the surface of the inner mold of the box beam in turn, the length of the columns close to the oblique sides of the side holes is gradually reduced to form a step shape, and horizontal support plates are successively arranged on these columns with gradually reduced lengths, a number of circular discs are evenly spaced on the columns, the horizontal support plate is connected to the circular discs at corresponding positions, an oblique brace is arranged between the outer end of the horizontal support plate and the circular disc below, the lower ends of the stepped columns are supported on the horizontal support plate in turn, connecting parts are arranged between adjacent circular discs on the same horizontal plane, and a square mesh structure is formed between these connecting parts.

2. The movable bracket for inner mold of special-shaped box beam of rotating bridge according to claim 1 is characterized by: The lower end of the column is arranged on a moving trolley, and rollers are arranged on both sides of the bottom surface of the moving trolley.

3. The movable bracket for inner mold of special-shaped box beam of rotating bridge according to claim 2 is characterized by: Tracks are arranged on both sides of the bottom plate of the box beam inner mold along the length direction, and the rollers on both sides of the moving trolley are matched and inserted into the tracks.

4. The movable bracket for inner mold of special-shaped box beam of rotating bridge according to claim 1 is characterized by: An L-shaped clamp is provided at the upper end of the diagonal support rod, a bent card is provided at the lower end, and a folding plate is provided on the outer edge of the horizontal support plate. The folding plate is provided with a square hole, the L-shaped clamp is inserted into the square hole, and the bent card is vertically inserted into the buckle hole on the circular buckle.

5. The movable bracket for inner mold of special-shaped box beam of rotating bridge according to claim 1 is characterized by: The connecting piece is a steel pipe, and a pin piece is arranged at the end of the steel pipe. The steel pipe is connected with the buckle hole on the circular buckle through the pin piece.

6. The movable bracket for inner mold of special-shaped box beam of rotating bridge according to claim 5 is characterized by: The outer end of the connecting piece is provided with a clamping groove, and a radial hole is provided in the middle of the clamping groove. A pin shaft is inserted between the radial hole and the through hole in the middle of the pin piece.

7. The movable bracket for inner mold of special-shaped box beam of rotating bridge according to claim 1 is characterized by: The upper end of the column is threadedly connected with a lifting rod, and the upper end of the lifting rod is pressed against the bottom surface of the square wood.

8. The movable bracket for inner mold of special-shaped box beam of rotating bridge according to claim 7 is characterized by: The upper end of the lifting rod is provided with a buckle plate, and the buckle plate is matched and buckled on the square wood.

9. The movable bracket for inner mold of special-shaped box beam of rotating bridge according to claim 1 is characterized by: The inner end of the horizontal support plate is provided with an insertion hole, which corresponds to the buckle hole of the circular buckle, and a positioning insert is inserted between the insertion hole and the buckle hole.

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