Bridge prefabricated box girder inner formwork supporting and reinforcing device

Abstract

A bridge prefabricated box girder inner formwork supporting and reinforcing device comprises two wedge-shaped cushion blocks and two steel bar frameworks, nuts are welded to the upper portions and the lower portions of the frameworks on the opposite sides of the two steel bar frameworks, connecting shafts are rotationally connected to the nuts, transverse steel bars are arranged on the upper middle portions and the lower middle portions of the steel bar frameworks, and inverted-L-shaped fixing shafts are welded to the transverse steel bars. A vertical shaft rod of the fixing shaft is sleeved with a shaft sleeve, a locking rod is welded to the shaft sleeve, the locking rods connected to the two steel reinforcement frameworks are connected through a flower basket adjusting lead screw, and the two wedge-shaped cushion blocks are arranged at the bottoms of the two steel reinforcement frameworks in a cushioned mode respectively. The utility model is simple to manufacture and process, simple and convenient to assemble and disassemble during application and high in construction speed, and can effectively solve the safety risk problems of unsuitability for disassembly in a specific space and limited space in a traditional reinforcing mode while achieving the supporting and reinforcing effects.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge box girder construction, in particular to a bridge prefabricated box girder inner template support reinforcement device. Background Art

[0002] There are two construction methods for casting box girders. The first is to cast in two times, first casting the bottom plate, and then casting the web and top plate. The second is to cast in one time. For both construction methods, the inner mold needs to be fixed with full-height scaffolding pipes for support. In the construction of Wu'an Middle Bridge post-tensioned prefabricated box girder of G243 Taipingliang Pingjie Engineering Construction Project, the internal structure cross-section size of the box girder is only 76cm×71cm, and the installation and disassembly operation space of scaffolding and formwork is very narrow. In addition, after the formwork support system is installed, the space is even smaller, and the construction working surface is a confined space, which increases the safety risk. Summary of the invention

[0003] In order to solve the above problems, the utility model provides a bridge prefabricated box girder inner formwork support reinforcement device, which can not only achieve the purpose of support reinforcement and meet the strength requirements, but also effectively solve the problems that traditional reinforcement methods are not suitable for operation when dismantled in a specific space and the safety risks of confined space.

[0004] The technical solution adopted by this utility model:

[0005] A device for supporting and reinforcing the inner formwork of a prefabricated box girder of a bridge comprises two wedge-shaped pads and two steel bar skeletons, nuts are welded to the upper and lower parts of the skeletons on opposite sides of the two steel bar skeletons, connecting shafts are rotatably connected to the nuts, transverse steel bars are arranged at the middle upper and middle lower parts of the steel bar skeletons, inverted "L"-shaped fixed shafts are welded to the transverse steel bars, shaft sleeves are sleeved on the vertical shaft rods of the fixed shafts, locking rods are welded to the shaft sleeves, the locking rods connected to the two steel bar skeletons are connected through a basket adjusting screw, and two wedge-shaped pads are respectively padded at the bottoms of the two steel bar skeletons.

[0006] The locking rod is provided with a thread, and threaded holes are provided at both ends of the flower basket adjusting screw rod. The locking rod is threadedly connected in the flower basket adjusting screw rod.

[0007] The top end of the vertical shaft rod of the fixed shaft located on one of the steel bar skeletons is connected with a blocking shaft.

[0008] The steel bar skeleton is a steel bar with a diameter of 12 mm.

[0009] The connecting shaft is a steel bar with a diameter of 10 mm.

[0010] The nut is an M12 nut.

[0011] The beneficial effects of the utility model are as follows: the utility model is simple to manufacture and process, and is easy to assemble and disassemble during use, has a fast construction speed, and can achieve the function of supporting and reinforcing while effectively solving the problems of traditional reinforcement methods being difficult to operate when dismantled in a specific space and the safety risks of confined spaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Among them: 1-basket adjustment screw; 2-fixed shaft; 3-wedge-shaped pad; 4-blocking shaft; 5-connecting shaft; 6-locking rod; 7-steel frame; 8-nut; 9-transverse steel bar; 10-sleeve. DETAILED DESCRIPTION

[0014] A device for supporting and reinforcing the inner formwork of a prefabricated box girder of a bridge comprises two wedge-shaped pads 3 and two steel bar skeletons 7. Nuts 8 are welded to the upper and lower parts of the skeletons on opposite sides of the two steel bar skeletons 7. A connecting shaft 5 is rotatably connected to the nut 8. Transverse steel bars 9 are arranged at the middle upper and middle lower parts of the steel bar skeleton 7. An inverted "L"-shaped fixed shaft 2 is welded to the transverse steel bar 9. A shaft sleeve 10 is sleeved on the vertical shaft rod of the fixed shaft 2. A locking rod 6 is welded to the shaft sleeve 10. The locking rod 6 connected to the two steel bar skeletons 7 is connected through a basket adjusting screw 1. Two wedge-shaped pads 3 are respectively arranged at the bottom of the two steel bar skeletons 7.

[0015] The locking rod 6 is provided with a thread, and threaded holes are provided at both ends of the flower basket adjusting screw rod 1. The locking rod 6 is threadedly connected in the flower basket adjusting screw rod 1. The locking rod 6 and the flower basket adjusting screw rod 1 form a locking rod member, and the locking rod member and the connecting shaft 5 connecting the two steel frame frames 7 form a locking device.

[0016] The top end of the vertical shaft rod of the fixed shaft 2 located on one of the steel bar skeletons 7 is connected with a stopper shaft 4 , which can prevent the sleeve 10 from detaching from the vertical shaft rod of the fixed shaft 2 .

[0017] The steel skeleton 7 is a 12mm steel bar, the connecting shaft 5 is a 10mm steel bar, the nut 8 is an M12 nut, and the connecting shaft 5 is connected in the nut 8, so that the two steel skeletons 7 can rotate with the connecting shaft 5 as the rotation axis according to the size of the space.

[0018] When the inner formwork is installed, the support and reinforcement device is positioned and reinforced against the square wood back ribs of the wooden formwork. The size of the steel skeleton 7 can be adjusted and processed according to the size of the inner formwork. When the inner formwork is made and assembled, the support and reinforcement device is placed inside the inner formwork before sealing the inner formwork top plate, and the locking rod 6 and the basket adjustment screw 1 are buckled on the vertical axis. The upper and lower elevations of the steel skeleton 7 are adjusted by the wedge-shaped pads 3, and the distance on both sides is adjusted by the basket adjustment screw 1 and the locking rod 6. Finally, it is checked and tightened to form a stable erection support device. When the inner formwork is removed, the concrete strength must reach 0.8MPa or above. The construction personnel climb into the box girder, adjust the locking device to remove the sleeve 10 from the vertical axis of the fixed axis 2 on a piece of steel skeleton 7, release the locking state, adjust the wedge-shaped pads 3, and move the support and reinforcement device back and forth. The inner formwork support system can be simply and quickly removed step by step.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The above is a detailed description of the embodiments of the utility model, but the contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A bridge prefabricated box girder inner formwork support reinforcement device, characterized in that: The invention comprises two wedge-shaped pads (3) and two steel frame frames (7). Nuts (8) are welded to the upper and lower parts of the frames on opposite sides of the two steel frame frames (7). A connecting shaft (5) is rotatably connected to the nut (8). Transverse steel bars (9) are arranged at the middle upper and middle lower parts of the steel frame frames (7). An inverted "L"-shaped fixed shaft (2) is welded to the transverse steel bar (9). A shaft sleeve (10) is sleeved on the vertical shaft rod of the fixed shaft (2). A locking rod (6) is welded to the shaft sleeve (10). The locking rods (6) connected to the two steel frame frames (7) are connected via a basket adjusting screw rod (1). The two wedge-shaped pads (3) are respectively arranged at the bottom of the two steel frame frames (7).

2. The bridge prefabricated box girder inner formwork support reinforcement device according to claim 1 is characterized in that: The locking rod (6) is provided with a thread, and threaded holes are provided at both ends of the flower basket adjusting screw rod (1). The locking rod (6) is threadedly connected in the flower basket adjusting screw rod (1).

3. The inner formwork support and reinforcement device for a prefabricated box girder of a bridge according to claim 1 is characterized in that: The top end of the vertical shaft rod of the fixed shaft (2) located on one of the steel reinforcement frames (7) is connected to a stop shaft (4).

4. The bridge prefabricated box girder inner formwork support reinforcement device according to claim 3 is characterized in that: The steel bar skeleton (7) is a steel bar with a diameter of 12 mm.

5. The bridge prefabricated box girder inner formwork support reinforcement device according to claim 1, characterized in that: The connecting shaft (5) is a steel bar with a diameter of 10 mm.

6. The bridge prefabricated box girder inner formwork support reinforcement device according to claim 1, characterized in that: The nut (8) is an M12 nut.

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