Cast-in-place longitudinal beam support structure for arch bridge construction

Abstract

The utility model belongs to the technical field of bridge supports, and particularly relates to a cast-in-place longitudinal beam support structure for arch bridge construction, which comprises two cross beams and a cast-in-place longitudinal beam, the cast-in-place longitudinal beam is arranged between the two cross beams, and the top of each cross beam is fixedly connected with a suspender. Side formworks are attached to the left side and the right side of the cast-in-place longitudinal beam, first square timber is attached to the side, away from the cast-in-place longitudinal beam, of each side formwork, clamping plates are attached to the sides, away from the side formworks, of the first square timber, and fastening screws are jointly installed between the clamping plates. The working platforms are placed on the two sides of the bottom joist, the working platforms are made of rectangular wood plates, then the positioning pins are arranged at the bottoms of the working platforms, and after the positioning pins are inserted into the bottom joist, the positioning pins are locked and fixed through the backing rings and the locking nuts in the notches of the positioning pins, so that a simple construction supporting table is provided for workers; and the installation is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge supports, in particular to a cast-in-place longitudinal beam support structure for arch bridge construction. Background Art

[0002] During the construction of arch bridges, the beams and columns, cross beams and longitudinal beams are mostly connected by wooden planks, and corresponding brackets need to be set on the outside of the mold for fixing. For example, the utility model patent with the announcement number CN200999463Y discloses a cast-in-place concrete beam formwork support composite structure, which uses square tube-shaped cross beams, longitudinal beams and columns, and is assembled into a concrete beam formwork frame through a set of plug-in connectors. The formwork frame is placed at the location of the concrete beam using a support rod equipped with a height adjustment base and a plug-in connector, which is used to lay the formwork and cast-in-place concrete beams.

[0003] However, the existing cast-in-place longitudinal beam support structure of arch bridge construction cannot accommodate a steel work platform with guardrails due to the small working space. Instead, wooden boards are laid on the I-beams below as the work platform for workers. When working, workers can hang their safety belts on the longitudinal beam steel bars or precision-rolled threaded steel bars. However, when wooden boards are used as the work platform, they are usually installed with bolts and nuts, which are easy to loosen and unstable. Therefore, improvements are needed. Utility Model Content

[0004] The utility model aims to provide a cast-in-place longitudinal beam support structure for arch bridge construction, which solves the problem in the prior art that wooden boards are used as working platforms and the installation combination of bolts and nuts is easy to loosen and unstable.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cast-in-place longitudinal beam support structure for arch bridge construction, comprising a cross beam and a cast-in-place longitudinal beam, the number of the cross beams is two, and a cast-in-place longitudinal beam is commonly arranged between the two cross beams, the top of the cross beam is fixedly connected with a hanger rod, the left and right sides of the cast-in-place longitudinal beam are both bonded with side formworks, each side of the side formwork away from the cast-in-place longitudinal beam is bonded with a square timber 1, the side of the square timber 1 away from the side formwork is bonded with a plywood, a fastening screw is commonly installed between the plywoods, the bottom of the cast-in-place longitudinal beam is bonded with a lower formwork, the lower formwork is in contact with the side formwork, the bottom of the lower formwork is bonded with a square timber 2, the bottom of the square timber 2 is bonded with a bottom supporting beam, the bottom supporting beam is in contact with the side formwork, the tops of the two cross beams are commonly in contact with an upper longitudinal beam, the interior of the bottom supporting beam is slidably connected with a threaded steel bar, the threaded steel bar passes through the upper longitudinal beam and is threadedly connected to the upper longitudinal beam.

[0006] Preferably, a connecting steel plate is fixedly connected to the lower section of the rod body of the threaded steel bar, and the connecting steel plate is in contact with the bottom support beam. The setting of the connecting steel plate has a limiting effect on the threaded steel bar.

[0007] Preferably, a work platform is placed on the upper end of the bottom support beam, and a positioning pin is fixedly connected to the bottom of the work platform, and the positioning pin passes through the bottom support beam and is slidably connected to the bottom support beam. A notch is opened in the lower section of the pin body of the positioning pin, and a gasket is movably connected to the inner side of the notch. A locking nut is threadedly connected to the lower section of the pin body of the positioning pin, and the locking nut contacts the gasket. The work platform is inserted into the bottom support beam through the positioning pin for positioning, and then locked and fixed by the locking nut.

[0008] Preferably, the upper end of the horizontal portion of the gasket is fixedly connected with a tooth block, and the tooth block abuts against the bottom support beam. Through the arrangement of the tooth block, the gasket can be forcefully inserted into the bottom support beam, thereby increasing the tightness of the combination between the gasket and the bottom support beam.

[0009] Preferably, a fixing pin is fixedly connected to the inner side of the notch, and the fixing pin is slidably connected to the gasket. The setting of the fixing pin has a limiting effect on the gasket.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] The utility model places a working platform on both sides of the bottom support beam, the working platform adopts a rectangular wooden board, and then arranges positioning pins at the bottom of the working platform. After the positioning pins are inserted into the bottom support beam, they are locked and fixed by gaskets in the notches and locking nuts, thereby providing a simple construction support platform for workers, and the installation is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 For the utility model Figure 1 Right view of;

[0014] Figure 3 For the utility model Figure 1 A top view of

[0015] Figure 4 For the utility model Figure 1 A-section structure enlarged view.

[0016] In the figure: 1. cross beam; 2. cast-in-place longitudinal beam; 3. hanger; 4. side formwork; 5. square wood one; 6. plywood; 7. fastening screw; 8. lower formwork; 9. square wood two; 10. bottom supporting beam; 11. upper longitudinal beam; 12. threaded steel bar; 13. connecting steel plate; 14. working platform; 15. positioning pin; 151. notch; 16. fixing pin; 17. washer; 18. tooth block; 19. locking nut. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-3 A cast-in-place longitudinal beam support structure for arch bridge construction comprises a cross beam 1 and a cast-in-place longitudinal beam 2. There are two cross beams 1, and a cast-in-place longitudinal beam 2 is commonly arranged between the two cross beams 1. A hanger 3 is fixedly connected to the top of the cross beam 1. Side formworks 4 are bonded to the left and right sides of the cast-in-place longitudinal beam 2. A square timber 5 is bonded to the side of each side formwork 4 away from the cast-in-place longitudinal beam 2. A plywood 6 is bonded to the side of the square timber 5 away from the side formwork 4. Fastening screws 7 are commonly installed between the plywoods 6. A lower formwork 8 is bonded to the bottom of the cast-in-place longitudinal beam 2. The lower formwork 8 contacts the side formwork 4. A square timber 9 is bonded to the bottom of the lower formwork 8. A bottom support beam 10 is bonded to the bottom of the square timber 9. The bottom support beam 10 contacts the side formwork 4. An upper longitudinal beam 11 is commonly contacted with the tops of the two cross beams 1. A threaded steel bar 12 is slidably connected to the inside of the bottom support beam 10. The threaded steel bar 12 passes through the upper longitudinal beam 11 and is connected to the upper longitudinal beam 11 by threads. The lower section of the rod body of the threaded steel bar 12 is fixedly connected with a connecting steel plate 13, and the connecting steel plate 13 is in contact with the bottom support beam 10. The setting of the connecting steel plate 13 has a limiting effect on the threaded steel bar 12.

[0019] See also Figure 1 , Figure 4 A work platform 14 is placed on the upper end of the bottom support beam 10, and a positioning pin 15 is fixedly connected to the bottom of the work platform 14. The positioning pin 15 penetrates the bottom support beam 10 and is slidably connected to the bottom support beam 10. A notch 151 is opened at the lower part of the pin body of the positioning pin 15, and a gasket 17 is movably connected to the inner side of the notch 151. A locking nut 19 is threadedly connected to the lower part of the pin body of the positioning pin 15, and the locking nut 19 contacts the gasket 17. The work platform 14 is inserted into the bottom support beam 10 through the positioning pin 15 for positioning, and then locked and fixed by the locking nut 19.

[0020] See also Figure 4 The upper end of the horizontal part of the gasket 17 is fixedly connected with a tooth block 18, and the tooth block 18 contacts the bottom support beam 10. Through the setting of the tooth block 18, it can be forced into the bottom support beam 10, thereby increasing the tightness of the combination between the gasket 17 and the bottom support beam 10. The inner side of the notch 151 is fixedly connected with a fixing pin 16, and the fixing pin 16 is slidably connected to the gasket 17. The setting of the fixing pin 16 has a limiting effect on the gasket 17.

[0021] The specific implementation process of the utility model is as follows: when in use, after fixing the side formwork 4 and the lower formwork 8 on the left and right sides of the cast-in-place longitudinal beam 2, the working platform 14 is placed on the upper parts of the two sides of the bottom support beam 10 for supporting the lower formwork 8, and the positioning pin 15 at the bottom of the working platform 14 passes through the bottom support beam 10, and then the gasket 17 on the inner side of the notch 151 of the positioning pin 15 is rotated so that the gasket 17 is placed horizontally and the side with the tooth block 18 is located at the top, and then the locking nut 19 is screwed on the lower end of the positioning pin 15, and the locking nut 19 then contacts the gasket 17 and applies pressure to the gasket 17 so that the tooth block 18 on the gasket 17 is stuck in the bottom support beam 10, so that the construction and fixation of the working platform 14 is completed, thereby providing a simple construction support platform for the staff to better carry out construction.

[0022] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cast-in-place longitudinal beam support structure for arch bridge construction, comprising a cross beam (1) and a cast-in-place longitudinal beam (2), characterized in that: The number of the cross beams (1) is two, and a cast-in-place longitudinal beam (2) is commonly arranged between the two cross beams (1), a suspension rod (3) is fixedly connected to the top of the cross beam (1), and side templates (4) are attached to the left and right sides of the cast-in-place longitudinal beam (2), and a square wood (5) is attached to the side of each side template (4) away from the cast-in-place longitudinal beam (2), and a plywood (6) is attached to the side of the square wood (5) away from the side template (4), and fastening screws (7) are commonly installed between the plywoods (6), and the cast-in-place longitudinal beam (2) is fixedly connected to the top of the cross beam (1), and a suspension rod (3) is fixedly connected to the top of the cross beam (1), and a side template (4) is fixedly connected to the left and right sides of the cast-in-place longitudinal beam (2). A lower template (8) is attached to the bottom, and the lower template (8) is in contact with the side template (4). A second square wood (9) is attached to the bottom of the lower template (8), and a bottom supporting beam (10) is attached to the bottom of the second square wood (9). The bottom supporting beam (10) is in contact with the side template (4). The tops of the two cross beams (1) are in contact with an upper longitudinal beam (11). The inside of the bottom supporting beam (10) is slidably connected with a threaded steel bar (12), and the threaded steel bar (12) passes through the upper longitudinal beam (11) and is connected to the upper longitudinal beam (11) by a thread.

2. The cast-in-place longitudinal beam support structure for arch bridge construction according to claim 1, characterized in that: The lower section of the rod body of the threaded steel bar (12) is fixedly connected to a connecting steel plate (13), and the connecting steel plate (13) is in contact with the bottom supporting beam (10).

3. The cast-in-place longitudinal beam support structure for arch bridge construction according to claim 1, characterized in that: A working platform (14) is placed on the upper end of the bottom supporting beam (10), and a positioning pin (15) is fixedly connected to the bottom of the working platform (14). The positioning pin (15) passes through the bottom supporting beam (10) and is slidably connected to the bottom supporting beam (10). A notch (151) is provided at the lower section of the pin body of the positioning pin (15), and a gasket (17) is movably connected to the inner side of the notch (151). A locking nut (19) is threadedly connected to the lower section of the pin body of the positioning pin (15), and the locking nut (19) is in contact with the gasket (17).

4. The cast-in-place longitudinal beam support structure for arch bridge construction according to claim 3, characterized in that: The upper end of the horizontal portion of the gasket (17) is fixedly connected with a tooth block (18), and the tooth block (18) contacts the bottom support beam (10).

5. The cast-in-place longitudinal beam support structure for arch bridge construction according to claim 3, characterized in that: A fixing pin (16) is fixedly connected to the inner side of the notch (151), and the fixing pin (16) is slidably connected to the gasket (17).

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