Prefabricated box girder hydraulic formwork shared by different girder heights and girder lengths

Abstract

The utility model relates to a prefabricated box girder hydraulic formwork shared by different girder heights and girder lengths, which belongs to the technical field of bridge formworks and comprises a bottom formwork, inclined side formworks, a beam frame, a transverse sliding plate, a transverse oil cylinder, a base, a comb plate and a top mold opening oil cylinder. The outer side walls of the chamfering arc plates are attached to the inner side walls of the side formworks, a mounting base is arranged below the base, a lifting mechanism for driving the base to ascend and descend is arranged on the mounting base, the multiple side formworks are arranged in the length direction of the prefabricated box girder, and a length adjusting mechanism is arranged on the outer side between the side formwork at the outermost end of the two ends and the adjacent side formwork. The box girder formwork adjusting device can be effectively shared by box girder formworks with different girder heights, and the efficiency of adjusting the formwork with the girder length can be greatly improved according to the conditions of different girder lengths. And the working efficiency is effectively improved, templates are saved, the wide application and popularization value is achieved, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This utility model relates to a hydraulic formwork for precast box girders with different beam heights and lengths, belonging to the field of bridge formwork technology. Background Technology

[0002] Precast beams are widely used in highway construction projects. Their advantage is that the upper and lower structures can be constructed and produced in parallel, effectively shortening the construction cycle.

[0003] However, due to the wide variety of beam lengths and heights, formwork fabrication must be tailored to different beam heights, angles, and lengths. For example, 25-meter and 30-meter box girders have beam heights of 1.4m and 1.6m respectively. Aside from the difference in length and height, all other design specifications are the same. Therefore, formwork customization must be based on the different beam heights and lengths, resulting in long processing times and high production costs. Utility Model Content

[0004] This invention provides a hydraulic formwork for precast box girders with different beam heights and lengths, solving the problems mentioned in the background art.

[0005] This utility model relates to a hydraulic formwork for precast box girders with different beam heights and lengths, including a bottom formwork, inclined side formwork, beam frame, transverse sliding plate, transverse hydraulic cylinder, base, comb plate, and top opening cylinder. Both sides of the bottom formwork are provided with chamfered arc plates, and the outer side wall of the chamfered arc plates fits against the inner side wall of the side formwork. A mounting seat is provided below the base, and a lifting mechanism for driving the base to rise and fall is provided on the mounting seat. Multiple side formworks are provided along the length of the precast box girder. A length adjustment mechanism is provided on the outer side of the outermost side formwork at both ends and the adjacent side formwork. After the length adjustment mechanism is extended, an extension pad is provided between the outermost side formwork at both ends and the adjacent side formwork.

[0006] As a preferred embodiment, the lifting mechanism includes a lifting cylinder fixed to the mounting base. The upper end of the lifting cylinder is hinged to the base, and multiple guide rods are fixed to the bottom of the base. The top of the mounting base has multiple guide holes that mate with the guide rods. The lifting cylinder can raise the base, thereby adjusting the height of the side template. The guide rods and guide holes facilitate stable adjustment of the side template's height.

[0007] As a preferred embodiment, multiple support pads are provided between the mounting base and the base when the lifting cylinder is raised. The top of the support pads is fixed to the base, and the bottom of the support pads is fixed to the mounting base. When the lifting cylinder is raised, the base can be supported by the support pads, preventing the lifting cylinder from being used for support during operation.

[0008] As a preferred embodiment, the length adjustment mechanism includes an adjusting sleeve fixed to the outside of the outermost side template. The adjusting sleeve is equipped with a guide column, the inner end of which is fixed to the beam frame on the side template adjacent to the outermost side template. A length adjusting cylinder is hinged to the adjusting sleeve, and the other end of the length adjusting cylinder is hinged to the inner end of the guide column. The position of the two end side templates can be easily adjusted by extending and retracting the length adjusting cylinder, thereby leaving a gap between the end side template and the adjacent side template. The length of the side template can be increased by adding an extension plate to adapt to the production of different beam lengths.

[0009] As a preferred option, the two sides of the extended pad are fixedly connected to the adjacent side templates with high-strength bolts to increase the stability of the extended pad.

[0010] As a preferred embodiment, the top of the transverse slide is hinged with a connecting stud, the upper end of which passes through the beam frame. Adjusting nuts are provided on the connecting studs above and below the beam frame, and a buffer spring is provided between the bottom of the beam frame and the lower adjusting nut.

[0011] This utility model has the following beneficial effects:

[0012] This hydraulic formwork for box girders can effectively share formwork for box girders of different heights, and greatly improves the efficiency of adjusting formwork length for different beam lengths. It is highly practical, effectively improves work efficiency, saves formwork, has wide application value, and reduces manufacturing costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of the present invention. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the main structure of the present invention. Figure 2 ;

[0015] Figure 3 This is a partial side view of the structure of this utility model;

[0016] Figure 4 for Figure 1 Partial structural diagram;

[0017] Figure 5 for Figure 3 Partial structural diagram Figure 1 ;

[0018] Figure 6 for Figure 3 Partial structural diagram Figure 2 ;

[0019] In the diagram: 1. Base; 2. Horizontal sliding plate; 3. Bottom template; 4. Chamfered arc plate; 5. Mounting seat; 6. Horizontal hydraulic cylinder; 7. Support pad; 8. Connecting stud; 9. Side template; 10. Comb plate; 11. Top mold opening hydraulic cylinder; 12. Beam frame; 13. Buffer spring; 14. Guide rod; 15. Lifting hydraulic cylinder; 16. Extended pad; 17. Guide column; 18. Length adjusting hydraulic cylinder; 19. Adjusting sleeve. Detailed Implementation

[0020] The present invention will be further described below with reference to the embodiments.

[0021] Example 1, as Figures 1 to 6 As shown, this utility model is a hydraulic formwork for precast box girders with different beam heights and lengths, including a bottom formwork 3, inclined side formwork 9, beam frame 12, transverse sliding plate 2, transverse oil cylinder 6, base 1, comb plate 10, and top opening cylinder 11. Both sides of the bottom formwork 3 are provided with chamfered arc plates 4, and the outer side wall of the chamfered arc plate 4 is attached to the inner side wall of the side formwork 9. The base 1 is provided with a mounting seat 5 below it, and the mounting seat 5 is provided with a lifting mechanism that drives the base 1 to rise and fall. The side formwork 9 is provided with multiple pieces along the length direction of the precast box girder. The outer side of the outermost side formwork 9 at both ends is provided with a length adjustment mechanism between the outermost side formwork 9 and the adjacent side formwork 9. After the length adjustment mechanism is extended, an extension pad 16 is provided between the outermost side formwork 9 at both ends and the adjacent side formwork 9.

[0022] Taking 25-meter and 30-meter box girders as examples, when pouring the 25-meter box girder, the length adjustment mechanism is in a retracted state, the extension pads 16 between the outermost side formwork 9 at both ends and the adjacent side formwork 9 are removed, and the lifting mechanism is in a lowered state. Figure 2 As shown, the hydraulic formwork is suitable for prefabricating 25-meter-long box girders.

[0023] When pouring the 30-meter box girder, the length adjustment mechanism is in the extended state, and extension pads 16 are added between the outermost side formwork 9 at both ends and the adjacent side formwork 9. The lifting mechanism is in the upward and downward state. Figure 1 As shown, the hydraulic formwork is suitable for prefabricating 30-meter-long box girders. At this point, the extended pad 16 is 2.5 meters long on each side. The side formwork 9 is made of composite stainless steel, with back ribs installed on the back according to the stress conditions. Adjacent side formwork 9 are fixed together with high-strength bolts.

[0024] In Embodiment 2, based on Embodiment 1, the lifting mechanism includes a lifting cylinder 15 fixed on the mounting base 5. The upper end of the lifting cylinder 15 is hinged to the base 1. Multiple guide rods 14 are fixed to the bottom of the base 1. Multiple guide holes that cooperate with the guide rods 14 are provided on the top of the mounting base 5.

[0025] When the lifting cylinder 15 is raised, multiple support blocks 7 are provided between the mounting base 5 and the base 1. The top of the support blocks 7 is fixed to the base 1, and the bottom of the support blocks 7 is fixed to the mounting base 5. The height of the support blocks 7 is 20 cm. When the 25-meter box girder is being poured, the lifting cylinder 15 is in the retracted state, and the bottom of the base 1 is in contact with the top of the mounting base 5. When the 30-meter box girder is being poured, the lifting cylinder 15 is in the extended state, and a gap is left between the bottom of the base 1 and the top of the mounting base 5. Then, the multiple support blocks 7 are inserted between the mounting base 5 and the base 1 for fixed support.

[0026] The top of the side template 9 is provided with a horizontal flange plate. A beam frame 12 is fixed to the outside of the side template 9. The bottom of the beam frame 12 is connected to the transverse slide plate 2. The transverse slide plate 2 is hinged to the transverse hydraulic cylinder 6. The other end of the transverse hydraulic cylinder 6 is hinged to the base 1. The comb plate 10 is located above the flange plate. A top mold opening hydraulic cylinder 11 is fixed on the beam frame 12 on the outer side of the upper part of the comb plate 10. The comb plate 10 is provided with a clearance opening to avoid the piston rod end of the top mold opening hydraulic cylinder 11. The top of the base 1 is provided with an inclined sliding plane. The transverse slide plate 2 is located above the sliding plane. The transverse slide plate 2 can move laterally in a direction perpendicular to the side template 9, which is more convenient for demolding. The front and rear sides of the sliding plane are provided with limiting flanges. The front and rear sides of the transverse slide plate 2 are provided with limiting flanges that wrap around the outer side of the limiting flanges, making the movement of the transverse slide plate 2 more stable. After the concrete box girder is poured, when the strength reaches the demolding condition, the top demolding cylinder 11 extends out, passes through the clearance opening of the comb plate 10, and presses against the upper side wall of the precast box girder. The reaction force causes the top of the side formwork 9 to move laterally outward, and at the same time the lateral cylinder 6 retracts, driving the lower part of the side formwork 9 to move laterally, thus moving the side formwork 9 up and down laterally outward to complete the demolding.

[0027] The length adjustment mechanism includes an adjustment sleeve 19 fixed to the outside of the outermost side template 9. A guide post 17 is provided inside the adjustment sleeve 19. The inner end of the guide post 17 is fixed to the beam frame 12 on the side template 9 adjacent to the outermost side template 9. A length adjustment cylinder 18 is hinged to the adjustment sleeve 19. The other end of the length adjustment cylinder 18 is hinged to the inner end of the guide post 17.

[0028] The two sides of the extended pad 16 are fixedly connected to the adjacent side template 9 by high-strength bolts.

[0029] When pouring the 25-meter box girder, the extended pad 16 is removed, and then the length adjusting cylinder 18 is retracted, which drives the adjusting sleeve 19 to retract inward along the guide column 17, so that the outermost side formwork 9 contacts the adjacent side formwork 9, and then it is fixed with high-strength bolts.

[0030] When pouring the 30-meter box girder, remove the high-strength bolts on the outermost side formwork 9, extend the length adjustment cylinder 18, and drive the adjustment sleeve 19 to extend outward along the guide column 17, so that the outermost side formwork 9 leaves a gap of 2.5 meters with the adjacent side formwork 9. Then, install the extension plate 16 on this gap, and then use high-strength bolts to fix the extension plate 16 to the side formwork 9.

[0031] The top of the transverse slide plate 2 is hinged with a connecting stud 8. The upper end of the connecting stud 8 passes through the beam frame 12. Adjusting nuts are provided on the connecting studs 8 above and below the beam frame 12. A buffer spring 13 is provided between the bottom of the beam frame 12 and the lower adjusting nut.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0033] In the description of this utility model, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A hydraulic formwork for precast box girders with different beam heights and lengths, comprising a bottom formwork (3), inclined side formwork (9), beam frame (12), transverse sliding plate (2), transverse hydraulic cylinder (6), base (1), comb plate (10), and top opening cylinder (11), characterized in that: Both sides of the bottom template (3) are provided with chamfered arc plates (4). The outer side wall of the chamfered arc plate (4) is in contact with the inner side wall of the side template (9). The base (1) is provided with a mounting seat (5). The mounting seat (5) is provided with a lifting mechanism that drives the base (1) to lift. The side template (9) is provided with multiple pieces along the length of the precast box girder. The outer side of the outermost side template (9) at both ends and the adjacent side template (9) is provided with a length adjustment mechanism. After the length adjustment mechanism is extended, the outermost side template (9) at both ends and the adjacent side template (9) are provided with an extension pad (16).

2. The hydraulic formwork for precast box girders with different beam heights and lengths as described in claim 1, characterized in that: The lifting mechanism includes a lifting cylinder (15) fixed on the mounting base (5). The upper end of the lifting cylinder (15) is hinged to the base (1). Multiple guide rods (14) are fixed at the bottom of the base (1). Multiple guide holes that cooperate with the guide rods (14) are provided on the top of the mounting base (5).

3. The hydraulic formwork for precast box girders with different beam heights and lengths as described in claim 2, characterized in that: When the lifting cylinder (15) is raised, multiple support pads (7) are provided between the mounting base (5) and the base (1). The top of the support pads (7) is fixed to the base (1), and the bottom of the support pads (7) is fixed to the mounting base (5).

4. The hydraulic formwork for precast box girders with different beam heights and lengths as described in claim 1, characterized in that: The length adjustment mechanism includes an adjustment sleeve (19) fixed on the outside of the outermost side template (9). A guide column (17) is provided inside the adjustment sleeve (19). The inner end of the guide column (17) is fixed to the beam frame (12) on the side template (9) adjacent to the outermost side template (9). A length adjustment cylinder (18) is hinged on the adjustment sleeve (19). The other end of the length adjustment cylinder (18) is hinged to the inner end of the guide column (17).

5. A precast box girder hydraulic formwork for use with different beam heights and lengths as described in claim 1, characterized in that: The two sides of the extended pad (16) are fixedly connected to the adjacent side template (9) by high-strength bolts.

6. A hydraulic formwork for precast box girders with different beam heights and lengths as described in claim 1, characterized in that: The top of the transverse slide (2) is hinged with a connecting stud (8), the upper end of the connecting stud (8) passes through the beam frame (12), and there are adjusting nuts on the connecting studs (8) above and below the beam frame (12). A buffer spring (13) is provided between the bottom of the beam frame (12) and the adjusting nut below.

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