Formwork expansion prevention structure for flange plate of precast beam

Abstract

The utility model relates to the technical field of bridge construction, in particular to a precast beam flange plate mold expansion prevention structure which comprises a flange template, a flange cantilever template and a matching beam, a matching beam pre-embedded anti-collision guardrail steel bar is arranged on the edge portion of the matching beam, and a positioning square pipe is placed on the side face of the matching beam pre-embedded anti-collision guardrail steel bar. An anti-expansion mold fixing lead screw penetrates through the positioning square pipe, a fixing nut fastened with the anti-expansion mold fixing lead screw is arranged on the side face of the positioning square pipe, the anti-expansion mold fixing lead screw is sleeved with a first protection sleeve and a second protection sleeve, and the first protection sleeve and the second protection sleeve are connected in an inserted mode. The prefabricated beam flange plate mold expansion prevention structure is arranged at the top face position of a flange template on the matched beam side, matched beam pre-embedded anti-collision guardrail steel bars and a cast-in-place beam flange template are fastened through the mold expansion prevention fixing lead screws, the cast-in-place beam flange template and the matched beam are fastened and connected into a whole, mold expansion caused by stress sinking of the flange template is prevented, and the construction efficiency is improved. The construction quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a prefabricated beam flange plate expansion-proof formwork structure. Background Art

[0002] In bridge construction, segmental beam prefabrication, where large beams are divided into multiple segments and prefabricated in a factory or prefabrication yard, improves production efficiency and quality control while reducing on-site construction time and project risks. The plate-like sections on the sides of precast beams serve as flanges, providing reinforcement and support while also bearing a portion of the loads acting on the beam.

[0003] Existing precast flange formwork for segmental beams is usually a cantilever structure. When the formwork is closed and assembled, the flange cantilever formwork is fastened and supported by the side formwork support rods. However, during the concrete pouring process, the fastening structure will be affected by the concrete pressure and the high-frequency vibrators of the inner and outer webs, which may easily cause thread slippage, resulting in the flange formwork sinking, and subsequent adjustments will waste time. Utility Model Content

[0004] The purpose of the present utility model is to provide a precast beam flange plate anti-expansion formwork structure to solve the problem raised in the above-mentioned background technology that the current segmental beam precast flange formwork is usually a cantilever structure, and the flange cantilever arm formwork is fastened and supported by the side formwork bracket strut when the formwork is closed and assembled. However, during the concrete pouring process, the fastening structure will be affected by the concrete pressure and the high-frequency vibrators of the inner and outer webs, which may easily cause slippage, resulting in the sinking of the flange formwork and a waste of time in subsequent adjustments.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a prefabricated beam flange plate anti-expansion formwork structure, comprising a flange formwork, a flange cantilever formwork and a matching beam, wherein the edge of the matching beam is provided with a matching beam embedded anti-collision guardrail steel bar, and a positioning square tube is placed on the side of the matching beam embedded anti-collision guardrail steel bar, an anti-expansion formwork fixing screw rod is passed through the positioning square tube, and a fixing nut fastened to the anti-expansion formwork fixing screw rod is provided on the side of the positioning square tube, a first protective sleeve and a second protective sleeve are sleeved on the anti-expansion formwork fixing screw rod, and the first protective sleeve and the second protective sleeve are plugged into each other, a positioning rod is welded on the flange formwork, and the anti-expansion formwork fixing screw rod is placed between the positioning rods, and the end of the anti-expansion formwork fixing screw rod is also sleeved with a locking plate in close contact with the positioning rod, so that the matching beam embedded anti-collision guardrail steel bar and the flange formwork are locked by the positioning square tube and the locking plate.

[0006] Preferably, a side formwork support rod connected to the flange cantilever formwork is installed at the upper end of the flange formwork, and the side formwork support rod is close to the positioning rod.

[0007] Preferably, the positioning rod is composed of two symmetrical U-shaped rods, and the gap between the positioning rods is smaller than the size of the locking plate.

[0008] Preferably, the first protective sleeve is arranged outside the second protective sleeve, and one end of the first protective sleeve is welded and fixed to the positioning square tube.

[0009] Preferably, one end of the second protective sleeve close to the first protective sleeve is turned outward, and one end of the first protective sleeve close to the second protective sleeve is turned inward.

[0010] Preferably, the second protective sleeve cooperates with the anti-expansion mold fixing screw through a threaded structure, and a fastening sleeve is sleeved on the second protective sleeve.

[0011] Preferably, a threaded structure is also provided on the outside of the second protective sleeve, and the second protective sleeve is movably connected to the fastening sleeve through the threaded structure.

[0012] Preferably, the side surface of the second protective sleeve away from the first protective sleeve is symmetrically fixed with a stabilizing block through a latch structure, and the inner side surface of the stabilizing block is provided with a slope structure.

[0013] Preferably, the fastening sleeve is located between the stabilizing block and the first protective sleeve, and the fastening sleeve is in contact with and fits the stabilizing block.

[0014] Preferably, one end of the fastening sleeve close to the stabilizing block is a tapered structure, and the stabilizing block is fastened between the fastening sleeve and the positioning rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the precast beam flange plate anti-expansion formwork structure is arranged on the top surface of the flange formwork on the matching beam side, and the matching beam's embedded anti-collision guardrail steel bars are fastened to the cast-in-place beam flange formwork through the anti-expansion formwork fixing screw, so that the cast-in-place beam flange formwork and the matching beam are fastened together to form a whole, preventing the flange formwork from sinking under force and causing the formwork to expand, thereby improving construction quality. The precast beam flange plate anti-expansion formwork structure is provided with a protective sleeve structure on the outside of the anti-expansion formwork fixing screw to prevent dust and water. The anti-expansion formwork fixing screw is stabilized in position by a rotatable stabilizing block during positioning, ensuring the tension of the anti-expansion formwork fixing screw and improving stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a prefabricated beam flange plate anti-expansion formwork structure of the utility model;

[0017] Figure 2 This utility model is a prefabricated beam flange plate anti-expansion mold structure Figure 1 A in the middle is an enlarged structural diagram;

[0018] Figure 3 This is a schematic diagram of the connection structure between the first protective sleeve and the second protective sleeve of a prefabricated beam flange plate anti-expansion mold structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure in which the fixed screw rod of the anti-expansion mold of the prefabricated beam flange plate anti-expansion mold structure of the present invention is connected to the stabilizing block through the second protective sleeve.

[0020] In the figure: 1. Matching beam embedded anti-collision guardrail steel bars; 2. Side formwork support rod; 3. Flange formwork; 4. Locking plate; 5. Positioning rod; 6. Flange cantilever formwork; 7. Positioning square tube; 8. First protective sleeve; 9. Fixing nut; 10. Anti-expansion formwork fixing screw; 11. Matching beam; 12. Fastening sleeve; 13. Stabilizing block; 14. Second protective sleeve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-4The utility model provides a technical solution: a prefabricated beam flange plate anti-expansion mold structure, including a flange template 3, a flange cantilever template 6 and a matching beam 11, a matching beam pre-embedded anti-collision guardrail steel bar 1 is set at the edge of the matching beam 11, and a positioning square tube 7 is placed on the side of the matching beam pre-embedded anti-collision guardrail steel bar 1, an anti-expansion mold fixing screw rod 10 is passed through the positioning square tube 7, and a fixing nut 9 fastened to the anti-expansion mold fixing screw rod 10 is provided on the side of the positioning square tube 7, a first protective sleeve 8 and a second protective sleeve 14 are sleeved on the anti-expansion mold fixing screw rod 10, the first protective sleeve 8 is arranged outside the second protective sleeve 14, and one end of the first protective sleeve 8 is welded and fixed to the positioning square tube 7, this structure positions the first protective sleeve 8 by the positioning square tube 7, so that the positioning square tube 7 and the anti-expansion mold can be fixed. The first protective sleeve 8 is used to relatively stabilize the expansion mold fixing screw rod 10, and the positioning square tube 7 is positioned by matching the beam embedded anti-collision guardrail steel bar 1 to achieve the locking and positioning of the anti-expanding mold fixing screw rod 10. The second protective sleeve 14 is close to the end of the first protective sleeve 8 and is turned outward, and the end of the first protective sleeve 8 is close to the second protective sleeve 14 and is turned inward. This structure can prevent the second protective sleeve 14 from falling from the first protective sleeve 8, thereby achieving the positioning of the second protective sleeve 14. The first protective sleeve 8 also performs dustproof and waterproof treatment on the outside of the anti-expanding mold fixing screw rod 10 to prevent the anti-expanding mold fixing screw rod 10 from rusting and affecting the strength. The second protective sleeve 14 cooperates with the anti-expanding mold fixing screw rod 10 through a threaded structure, and the second protective sleeve 1 4 is provided with a fastening sleeve 12, which can rotate the second protective sleeve 14 to adjust the position of the second protective sleeve 14 relative to the anti-expansion mold fixed screw 10. A threaded structure is also provided on the outside of the second protective sleeve 14, and the second protective sleeve 14 is movably connected to the fastening sleeve 12 through a threaded structure. This structure allows the fastening sleeve 12 to be adjusted on the second protective sleeve 14 when it is rotated relative to the second protective sleeve 14. The side surface of the end of the second protective sleeve 14 away from the first protective sleeve 8 is symmetrically fixed with a stabilizing block 13 through a latch structure, and the inner side surface of the stabilizing block 13 is provided with an inclined surface structure. This structure allows the stabilizing block 13 to be rotated and adjusted relative to the second protective sleeve 14. By controlling the angle of the stabilizing block 13, the stabilizing block 13 can be adjusted. The fixing block 13 is supported between the positioning rods 5, so that the position of the anti-expansion mold fixing screw 10 is stable, and the anti-expansion mold fixing screw 10 is ensured to be evenly stressed. The fastening sleeve 12 is located between the stabilizing block 13 and the first protective sleeve 8, and the fastening sleeve 12 is in contact with the stabilizing block 13. This structure can push the stabilizing block 13 to rotate and open by rotating the fastening sleeve 12, and the first protective sleeve 8 and the second protective sleeve 14 are plugged into each other. The end of the fastening sleeve 12 close to the stabilizing block 13 is a conical structure, and the stabilizing block 13 is fastened between the fastening sleeve 12 and the positioning rod 5. This structure can control the position of the stabilizing block 13 relative to the positioning rod 5 by adjusting the position of the second protective sleeve 14 and the fastening sleeve 12. After the stabilizing block 13 is opened by the push of the fastening sleeve 12,The stabilizing block 13 can be fastened between the positioning rods 5, and the fastening sleeve 12 can be more easily pushed to support and stabilize the stabilizing block 13 after it is rotated and opened through the tapered structure. The flange formwork 3 is welded with a positioning rod 5, and the upper end of the flange formwork 3 is installed with a side formwork support strut 2 connected to the flange cantilever formwork 6, and the side formwork support strut 2 is close to the positioning rod 5. When this structure is used for prefabrication of the segmental beam, when the formwork is closed and assembled, the flange cantilever formwork 6 is fastened and supported relative to the flange formwork 3 by the side formwork support strut 2, so as to achieve the connection between the matching beam 11 and the flange formwork 3, and the anti-expansion formwork fixing screw rod 10 is fastened with the positioning square tube 7 and the locking plate 4 to avoid the concrete pressure and the high-frequency vibrators of the inner and outer webs affecting the stability of the fastening during the concrete pouring process, and prevent the flange formwork 3 from sinking due to slippage, and the anti-expansion formwork fixing screw rod 10 It is placed between the positioning rods 5, and the end of the anti-expansion mold fixing screw rod 10 is also provided with a locking plate 4 in close contact with the positioning rod 5, so that the matching beam pre-embedded anti-collision guardrail steel bar 1 and the flange formwork 3 are locked by the positioning square tube 7 and the locking plate 4. The positioning rod 5 is composed of two symmetrical U-shaped rods, and the gap between the positioning rods 5 is smaller than the size of the locking plate 4. This structure can perform relative positioning processing on the anti-expansion mold fixing screw rod 10 and the flange formwork 3 through the positioning rod 5. After the locking plate 4 rotates on the anti-expansion mold fixing screw rod 10, it is close to the positioning rod 5, realizing the locking processing of the anti-expansion mold fixing screw rod 10 on the spacing between the positioning square tube 7 and the locking plate 4, and realizing the locking processing between the matching beam pre-embedded anti-collision guardrail steel bar 1 and the flange formwork 3, and fastening the flange formwork 3 of the cast-in-place beam to the matching beam 11 to form a whole, preventing the flange formwork 3 from sinking under force and causing the formwork to expand.

[0023] Working principle: When using the precast beam flange plate anti-expansion formwork structure, first connect the flange formwork 3 of the precast beam with the flange cantilever formwork 6 through the side formwork support strut 2, and the matching beam pre-embedded anti-collision guardrail steel bar 1 is pre-embedded in the matching beam. When performing the anti-expansion formwork processing of the flange formwork 3, the anti-expansion formwork fixing screw rod 10 is passed through the bottom of the matching beam pre-embedded anti-collision guardrail steel bar 1 through the positioning square tube 7, and the anti-expansion formwork fixing screw rod 10 is placed between the positioning rods 5. The positioning square tube 7 is fastened to the anti-expansion formwork fixing screw rod 10 through the fixing nut 9, so that the second protective sleeve 14 is rotated relative to the anti-expansion formwork fixing screw rod 10, and the position of the second protective sleeve 14 is adjusted. The first protective sleeve 8 positions one end of the second protective sleeve 14, and through the first protective The sleeve 8 plays a role in dustproof and waterproofing for the anti-expansion mold fixing screw rod 10. When adjusting the position of the second protective sleeve 14, ensure that the stabilizing blocks 13 are located on both sides, and then rotate the fastening sleeve 12 under the positioning of the second protective sleeve 14, and push the stabilizing blocks 13 to open through the conical structure of the fastening sleeve 12, so that the stabilizing blocks 13 are fastened between the fastening sleeve 12 and the positioning rod 5, so that the distance between the two sides of the anti-expansion mold fixing screw rod 10 relative to the positioning rod 5 is consistent, and then the locking plate 4 is put onto the anti-expansion mold fixing screw rod 10, and the anti-expansion mold fixing screw rod 10 is locked by the locking plate 4 to achieve the fastening between the matching beam 11 and the flange formwork 3, thereby preventing the flange formwork 3 from sinking during concrete pouring, ensuring the construction quality, and thus completing a series of tasks.

[0024] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A precast beam flange plate anti-expansion formwork structure, comprising a flange formwork (3), a flange cantilever formwork (6) and a matching beam (11), characterized in that: The edge of the matching beam (11) is provided with a matching beam embedded anti-collision guardrail steel bar (1), and a positioning square tube (7) is placed on the side of the matching beam embedded anti-collision guardrail steel bar (1), an anti-expansion mold fixing screw rod (10) is passed through the positioning square tube (7), and a fixing nut (9) fastened to the anti-expansion mold fixing screw rod (10) is provided on the side of the positioning square tube (7), and a first protective sleeve (8) and a second protective sleeve (14) are sleeved on the anti-expansion mold fixing screw rod (10) , and the first protective sleeve (8) and the second protective sleeve (14) are plugged into each other, a positioning rod (5) is welded on the flange template (3), and the anti-expansion mold fixing screw (10) is placed between the positioning rods (5), and the end of the anti-expansion mold fixing screw (10) is also sleeved with a locking plate (4) in close contact with the positioning rod (5), so that the matching beam pre-embedded anti-collision guardrail steel bar (1) and the flange template (3) are locked by the positioning square tube (7) and the locking plate (4).

2. The precast beam flange plate anti-expansion formwork structure according to claim 1, characterized in that: The upper end of the flange formwork (3) is provided with a side formwork support rod (2) connected to the flange cantilever formwork (6), and the side formwork support rod (2) is close to the positioning rod (5).

3. The precast beam flange plate anti-expansion formwork structure according to claim 1, characterized in that: The positioning rods (5) are composed of two symmetrical U-shaped rods, and the gap between the positioning rods (5) is smaller than the size of the locking plate (4).

4. The precast beam flange plate anti-expansion formwork structure according to claim 1, characterized in that: The first protective sleeve (8) is arranged outside the second protective sleeve (14), and one end of the first protective sleeve (8) is welded and fixed to the positioning square tube (7).

5. The precast beam flange plate anti-expansion formwork structure according to claim 1, characterized in that: One end of the second protective sleeve (14) close to the first protective sleeve (8) is turned outward, and one end of the first protective sleeve (8) close to the second protective sleeve (14) is turned inward.

6. The precast beam flange plate anti-expansion formwork structure according to claim 1, characterized in that: The second protective sleeve (14) is matched with the anti-expansion mold fixing screw (10) through a threaded structure, and a fastening sleeve (12) is sleeved on the second protective sleeve (14).

7. The precast beam flange plate anti-expansion formwork structure according to claim 6, characterized in that: A threaded structure is also provided on the outside of the second protective sleeve (14), and the second protective sleeve (14) and the fastening sleeve (12) are movably connected via the threaded structure.

8. The precast beam flange plate anti-expansion formwork structure according to claim 7, characterized in that: A stabilizing block (13) is symmetrically and movably fixed to the side surface of one end of the second protective sleeve (14) away from the first protective sleeve (8) via a latch structure, and an inclined surface structure is provided on the inner side surface of the stabilizing block (13).

9. The precast beam flange plate anti-expansion formwork structure according to claim 8, characterized in that: The fastening sleeve (12) is located between the stabilizing block (13) and the first protective sleeve (8), and the fastening sleeve (12) and the stabilizing block (13) are in contact and fit.

10. The precast beam flange plate anti-expansion formwork structure according to any one of claims 6 to 9, characterized in that: One end of the fastening sleeve (12) close to the stabilizing block (13) is a conical structure, and the stabilizing block (13) is fastened between the fastening sleeve (12) and the positioning rod (5).

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