Prefabricated box girder template

Abstract

The utility model relates to the technical field of box girder prefabrication, in particular to a prefabricated box girder formwork which comprises a base and a supporting assembly installed on the top of the base. According to the prefabricated box girder formwork, when the box girder formwork is combined and spliced, a plurality of bottom formworks are sequentially spliced into a base in a sliding mode, then side formworks are inserted into the bottom formworks in a sliding mode through sliding plates, and at the moment, hydraulic rods are started to drive supporting blocks to make contact with the bottoms of the side formworks for supporting; then a first screw rod is rotated to move towards one side of the side template, and a side edge supporting block supports the side edge of the side template, so that the service life of the template is prolonged; the top formwork is inserted into the tops of the side formworks in a sliding mode from back to front, the top formwork is supported and limited by the supporting plates, the supporting plates can be detachably connected with the first fixing plates through fastening screws, and then the second fixing plates are inserted into the side formworks and then detachably connected with the supporting plates through fastening screws. And it is guaranteed that when the top formwork blocks concrete, the situation of side leakage at the connecting position is not likely to happen.

Description

Technical Field

[0001] This application relates to the technical field of precast box girders, specifically to precast box girder forms. Background Art

[0002] A box girder is a type of beam in bridge engineering. It is hollow inside and has flanges on both sides of the upper part, resembling a box, hence the name. Its types include single-box, multi-box, etc. As an important structure in bridge engineering, reinforced concrete box girders are divided into precast box girders and cast-in-place box girders according to the concrete pouring method. Among them, cast-in-place box girders refer to directly pouring box girders on the construction site, and precast box girders refer to prefabricating in an independent site in advance and then hoisting after the completion of the bridge substructure. Because precast box girders can effectively avoid construction cross-interference, greatly improve the project progress, and save the construction period, precast box girders are widely used.

[0003] Common formwork solutions for pouring precast box girders include wooden formwork, ordinary composite steel formwork, and customized steel formwork, etc. The wooden formwork solution is simple and flexible, but the formwork has poor stiffness, few turnover times, many offsets and joints, low formwork installation and removal efficiency, and the appearance quality of concrete cannot be guaranteed, and it is only suitable for small bridge projects with low requirements. Although the stiffness of ordinary composite steel formwork is higher than that of wooden formwork, it requires a combination of various specifications of formwork for supporting, with great assembly difficulty, still low formwork installation and removal efficiency, many joints, and the appearance quality of concrete cannot be guaranteed, and it cannot be applied to large bridge projects with short construction periods. Although the one-time investment cost of the customized steel formwork solution is relatively high, the formwork has good integrity and high stiffness, and mechanical assistance can be used for formwork installation and removal, greatly improving the construction efficiency. Therefore, the customized steel formwork solution is most frequently used in actual precast box girders.

[0004] In the process of implementing this application, the inventor found that there are at least the following problems in this technology. The strength of the existing box girder formwork is insufficient. When concrete is poured into the formwork during support, cracks are likely to occur at the joints and bending occurs, and it cannot provide sufficient support for pouring box girders. At the same time, the connection between the bottom support member of the box girder formwork and the side formwork is not tight enough, and the box girder formwork is prone to leakage of mortar, bulging of formwork, etc., resulting in fracture of the box girder side formwork and other material losses, reducing the service life of the box girder formwork. Therefore, a precast box girder formwork is proposed to solve the problems raised above. Summary of the Utility Model

[0005] In view of the deficiencies of the prior art, this application provides a precast box girder formwork, which has the advantages that the formwork is more convenient and faster to assemble and splicing, and the support stability is stronger, and it is not easy to have concrete side leakage, etc., solving the problems that the support structure of the existing box girder formwork is not stable enough during pouring, which is likely to cause the formwork to bend and break, and at the same time, the connection between the bottom support member of the box girder formwork and the side formwork is not tight enough, and the box girder formwork is prone to leakage of mortar, bulging of formwork, etc., resulting in fracture of the box girder side formwork and other material losses.

[0006] To achieve the purpose of stronger stability of the above support, ensuring that concrete side leakage is not likely to occur during connection, and improving the service life of the formwork, the present application provides the following technical solutions: a precast box girder formwork, including a base and a support assembly installed on the top of the base;

[0007] The support assembly includes a bottom formwork installed inside the base, a sliding plate slidably connected inside the bottom formwork, a side formwork fixedly connected to the top of the sliding plate, an installation plate slidably connected to the top of the base, a support plate fixedly connected to the top of the installation plate, a first screw threadedly connected inside the support plate, a side support block hinged to the outer surface of the first screw, a hydraulic rod fixedly connected to the top of the support plate, a support block fixedly connected to the telescopic end of the hydraulic rod, a top formwork detachably connected inside the side formwork, a support plate fixedly connected to the outer surface of the top formwork, a first fixing plate fixedly connected to the top of the side formwork, a second fixing plate movably inserted into the top of the side formwork, an extension plate fixedly connected to the outer surface of the base, and an auxiliary support plate fixedly connected to the top of the extension plate.

[0008] When the box girder formwork is assembled and spliced in the present application, first, several bottom formworks are sequentially slid and spliced into the inside of the base, and then the side formwork is slidably inserted into the inside of the bottom formwork via the sliding plate. At this time, the hydraulic rod is started to drive the support block to contact the bottom of the side formwork for support, and then the first screw is rotated to move towards one side of the side formwork, and the side support block supports the side of the side formwork; the top formwork is slidably inserted into the top of the side formwork in the order from back to front, and the support plate supports and limits it to ensure that the top formwork is not likely to have side leakage at the connection when blocking concrete.

[0009] Further, a combined cavity is opened inside the base, the bottom formwork is located inside the base through the combined cavity, a groove is opened inside the bottom formwork, and a convex block is opened on the outer surface of the bottom formwork.

[0010] The beneficial effect of adopting the above further solution is that when the bottom formwork is assembled and spliced, the design of the groove and the convex block makes the splicing more convenient and fast, and the connection is not likely to become detached.

[0011] Further, a first splicing groove is opened inside the bottom formwork, and the sliding plate is located inside the bottom formwork through the first splicing groove.

[0012] The beneficial effect of adopting the above further solution is that when the sliding plate is spliced, the first splicing groove can play a positioning role and lay a foundation for subsequent formwork splicing.

[0013] Further, an installation groove is opened inside the base, and the installation plate is located inside the base through the installation groove.

[0014] The beneficial effects of adopting the above further solution are as follows: The mounting plate is located inside the base through the mounting groove, ensuring that the mounting plate can be limited in the front and back directions inside the base, and minimizing the occurrence of displacement in the front and back directions.

[0015] Furthermore, a rotating block is rotatably connected inside the base. A second screw rod is fixedly connected to the outer surface of the rotating block. A clamping block is threadedly connected to the outer surface of the second screw rod. The shape of the clamping block is an L-shaped block. A clamping block groove is formed inside the support plate. The clamping block is located inside the support plate through the clamping block groove.

[0016] The beneficial effects of adopting the above further solution are as follows: When the support plate is providing support, the clamping block can be first toggled to stand up and aligned with the clamping block groove, and then the second screw rod is rotated inside the base. Consequently, the clamping block pushes the support plate closer to the side formwork, and the mounting plate abuts and limits the bottom formwork, thereby achieving the stability of the side connection.

[0017] Furthermore, a spring is fixedly connected to the outer surface of the first screw rod, and an inclined surface is formed on the outer surface of the side support block.

[0018] The beneficial effects of adopting the above further solution are as follows: When the first screw rod is tightened and moves closer to the side formwork, the side support block can better fit on the outer surface of the side formwork, ensuring stronger stability during support.

[0019] Furthermore, a second splicing groove is formed inside the side formwork. The top formwork is located inside the side formwork through the second splicing groove. The shape of the support plate is a trapezoidal plate. Fastening screws are threadedly connected inside both the first fixing plate and the second fixing plate. The top formwork is detachably connected to the side formwork through the fastening screws.

[0020] The beneficial effects of adopting the above further solution are as follows: After the top formwork is slid and inserted into the top of the side formwork, the support plate can be detachably connected to the first fixing plate through the fastening screws. Then, after the second fixing plate is inserted into the side formwork, it is detachably connected to the support plate through the fastening screws.

[0021] Furthermore, a connection through-hole is formed inside the auxiliary support plate, and a fastening bolt is inserted through the connection through-hole. The auxiliary support plate is detachably connected to the side formwork through the fastening bolt.

[0022] The beneficial effects of adopting the above further solution are as follows: When the side formwork is providing support during pouring, it can be detachably connected to the side formwork through the fastening bolt. Thus, when the hydraulic rod and the support block are damaged during support, the auxiliary support plate can be used for support, further extending the service life of the device.

[0023] Compared with the prior art, the present application provides a precast box girder formwork, which has the following beneficial effects:

[0024] For this precast box girder formwork, when the box girder formwork is assembled and spliced, first slide and splice several bottom formworks into the inside of the base in sequence, and then the side formwork is slidably inserted into the inside of the bottom formwork through the sliding plate. At this time, start the hydraulic rod to drive the support block to contact the bottom of the side formwork for support, and then rotate the first screw rod to move it to one side of the side formwork, and the side support block supports the side of the side formwork, thereby improving the service life of the formwork; the top formwork is slidably inserted into the top of the side formwork in the order from back to front, and the support plate supports and limits it. The support plate can be detachably connected to the first fixing plate through the fastening screw. Then, after the second fixing plate is inserted into the side formwork, it is detachably connected to the support plate through the fastening screw to ensure that the top formwork is not prone to side leakage at the joint when blocking the concrete. Description of the Drawings

[0025] Figure 1 It is the main cross-sectional view of the structure of the present application;

[0026] Figure 2 It is the top view of the base of the structure of the present application;

[0027] Figure 3 It is the side view of the side formwork of the structure of the present application;

[0028] Figure 4 It is the three-dimensional view of the base of the structure of the present application.

[0029] In the figure: 1. Base; 2. Installation groove; 3. Bottom formwork; 4. Sliding plate; 5. Side formwork; 6. Installation plate; 7. Support plate; 8. First screw rod; 9. Side support block; 10. Hydraulic rod; 11. Support block; 12. Rotating block; 13. Second screw rod; 14. Clamping block; 15. Top formwork; 16. Support plate; 17. First fixing plate; 18. Fastening screw; 19. Extension plate; 20. Auxiliary support plate; 21. Second fixing plate. Detailed Embodiments

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0031] Please refer to Figures 1-4The prefabricated box beam formwork includes a base 1 and a supporting assembly installed on the top of the base 1; the supporting assembly includes a bottom formwork 3 installed inside the base 1, and a combined cavity is provided inside the base 1. The bottom formwork 3 is located inside the base 1 through the combined cavity. A groove is provided inside the bottom formwork 3, and a protrusion is provided on the outer surface of the bottom formwork 3. When the bottom formwork 3 is combined and spliced, the design of the groove and the protrusion makes the splicing more convenient and quick, and the connection is not easy to be separated.

[0032] See also Figures 1-2 , Figure 4 The support assembly also includes a sliding plate 4 slidably connected to the inside of the bottom template 3, and a first splicing groove is opened inside the bottom template 3. The sliding plate 4 is located inside the bottom template 3 through the first splicing groove. When the sliding plate 4 is spliced, the first splicing groove can play a positioning effect, paving the way for subsequent splicing of the template.

[0033] See also Figures 1-2 , Figure 4 The support assembly also includes a side template 5 fixedly connected to the top of the sliding plate 4, a mounting plate 6 slidably connected to the top of the base 1, and a mounting groove 2 is opened inside the base 1. The mounting plate 6 is located inside the base 1 through the mounting groove 2. The mounting plate 6 is located inside the base 1 through the mounting groove 2 to ensure that the mounting plate 6 can be limited inside the base 1 front and back to avoid displacement front and back as much as possible.

[0034] See also Figures 1-2 , Figure 4 The support assembly also includes a support plate 7 fixedly connected to the top of the mounting plate 6, a first screw 8 threadedly connected to the inside of the support plate 7, a spring fixedly connected to the outer surface of the first screw 8, a side support block 9 hinged to the outer surface of the first screw 8, and an inclined surface on the outer surface of the side support block 9. When the first screw 8 is tightened and close to the side formwork 5, the side support block 9 can better fit the outer surface of the side formwork 5, thereby ensuring stronger stability during support.

[0035] See also Figures 1-4 The support assembly also includes a rotating block 12 that is rotatably connected to the inside of the base 1, and a second screw 13 is fixedly connected to the outer surface of the rotating block 12. The outer surface of the second screw 13 is threadedly connected to a clamping block 14, and the clamping block 14 is in the shape of an L-shaped block. A clamping block groove is provided inside the support plate 7, and the clamping block 14 is located inside the support plate 7 through the clamping block groove. When the support plate 7 is supporting, the clamping block 14 can be first moved to stand up and align with the clamping block groove, and then the second screw 13 is rotated to rotate inside the base 1, and then the clamping block 14 pushes the support plate 7 to approach the side template 5, and the mounting plate 6 limits the bottom template 3, thereby achieving the stability of the side connection.

[0036] See also Figures 1-4, the support assembly further includes a hydraulic rod 10 fixedly connected to the top of the support plate 7, a support block 11 fixedly connected to the telescopic end of the hydraulic rod 10, a top formwork 15 detachably connected to the inside of the side formwork 5. A second splicing groove is provided inside the side formwork 5, and the top formwork 15 is located inside the side formwork 5 through the second splicing groove. A support plate 16 is fixedly connected to the outer surface of the top formwork 15, a first fixing plate 17 is fixedly connected to the top of the side formwork 5, a second fixing plate 21 is movably inserted into the top of the side formwork 5. The support plate 16 is in the shape of a trapezoidal plate. Tightening screws 18 are threadedly connected to the inside of both the first fixing plate 17 and the second fixing plate 21. The top formwork 15 is detachably connected to the side formwork 5 through the tightening screws 18. After the top formwork 15 is slid and inserted into the top of the side formwork 5, the support plate 16 can be detachably connected to the first fixing plate 17 through the tightening screws 18. Then, after the second fixing plate 21 is inserted into the side formwork 5, it is detachably connected to the support plate 16 through the tightening screws 18.

[0037] Please refer to Figures 1-4 , the support assembly further includes an extension plate 19 fixedly connected to the outer surface of the base 1, and an auxiliary support plate 20 fixedly connected to the top of the extension plate 19. A connection through-hole is provided inside the auxiliary support plate 20, and a fastening bolt is passed through the inside of the connection through-hole. The auxiliary support plate 20 is detachably connected to the side formwork 5 through the fastening bolt. When the side formwork 5 is being supported during pouring, it can be detachably connected to the side formwork 5 through the fastening bolt. Thus, when the hydraulic rod 10 and the support block 11 are damaged during support, the auxiliary support plate 20 can be used for support, further improving the service life of the device.

[0038] In this embodiment, the bottom formwork 3 is composed of a plurality of formworks spliced together. Thus, during use, the width can be spliced and extended according to actual use size requirements, improving the adaptability of the device.

[0039] The working principle of the above embodiment is as follows:

[0040] For this precast box girder formwork, when the box girder formwork is assembled and spliced, first, several bottom formworks 3 are sequentially slid and spliced into the inside of the base 1. Then, the side formworks 5 are slid and inserted into the inside of the bottom formwork 3 through the sliding plates 4. At this time, the hydraulic rod 10 is started to drive the support block 11 to contact the bottom of the side formwork 5 for support. Then, the first screw rod 8 is rotated to move towards one side of the side formwork 5, and the side support block 9 supports the side of the side formwork 5, thereby improving the service life of the formwork. The top formwork 15 is slid and inserted into the top of the side formwork 5 in the order from back to front. The support plate 16 supports and limits it. The support plate 16 can be detachably connected to the first fixing plate 17 through the tightening screws 18. Then, after the second fixing plate 21 is inserted into the side formwork 5, it is detachably connected to the support plate 16 through the tightening screws 18, ensuring that the top formwork 15 is not prone to side leakage at the connection when blocking concrete.

[0041] All electrical components appearing in the text are electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer for control. Standard parts used in the application can all be purchased from the market. Special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt mature bolts, rivets, welding and other conventional means in the prior art. Conventional models are adopted for machinery, parts and equipment in the prior art; in addition, the circuit connection adopts a conventional connection method in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. Prefabricated box beam formwork, characterized by: It comprises a base (1) and a support assembly installed on the top of the base (1); The support assembly comprises a bottom template (3) installed inside the base (1), a sliding plate (4) slidably connected to the inside of the bottom template (3), a side template (5) fixedly connected to the top of the sliding plate (4), a mounting plate (6) slidably connected to the top of the base (1), a support plate (7) fixedly connected to the top of the mounting plate (6), a first screw (8) threadedly connected to the inside of the support plate (7), a side support block (9) hinged to the outer surface of the first screw (8), and a liquid-tight seal fixedly connected to the top of the support plate (7). A pressure rod (10), a support block (11) fixedly connected to the telescopic end of the hydraulic rod (10), a top template (15) detachably connected to the inside of the side template (5), a support plate (16) fixedly connected to the outer surface of the top template (15), a first fixed plate (17) fixedly connected to the top of the side template (5), a second fixed plate (21) movably plugged into the top of the side template (5), an extension plate (19) fixedly connected to the outer surface of the base (1), and an auxiliary support plate (20) fixedly connected to the top of the extension plate (19).

2. The prefabricated box beam template according to claim 1 is characterized in that: A combined cavity is provided inside the base (1), the bottom template (3) is located inside the base (1) via the combined cavity, a groove is provided inside the bottom template (3), and a protrusion is provided on the outer surface of the bottom template (3).

3. The prefabricated box beam template according to claim 1 is characterized in that: A first splicing groove is provided inside the bottom template (3), and the sliding plate (4) is located inside the bottom template (3) through the first splicing groove.

4. The prefabricated box beam template according to claim 1 is characterized in that: A mounting groove (2) is provided inside the base (1), and the mounting plate (6) is located inside the base (1) through the mounting groove (2).

5. The prefabricated box beam template according to claim 1 is characterized in that: A rotating block (12) is rotatably connected inside the base (1), a second screw rod (13) is fixedly connected to the outer surface of the rotating block (12), a clamping block (14) is threadedly connected to the outer surface of the second screw rod (13), the clamping block (14) is in the shape of an L-shaped block, a clamping block groove is provided inside the support plate (7), and the clamping block (14) is located inside the support plate (7) through the clamping block groove.

6. The prefabricated box beam template according to claim 1, characterized in that: A spring is fixedly connected to the outer surface of the first screw rod (8), and an inclined surface is provided on the outer surface of the side support block (9).

7. The prefabricated box beam template according to claim 1, characterized in that: A second splicing groove is provided inside the side template (5), the top template (15) is located inside the side template (5) through the second splicing groove, the support plate (16) is in the shape of a trapezoidal plate, the first fixing plate (17) and the second fixing plate (21) are both threadedly connected with fastening screws (18) inside, and the top template (15) is detachably connected to the side template (5) via the fastening screws (18).

8. The prefabricated box beam template according to claim 1, characterized in that: A connecting through hole is provided inside the auxiliary support plate (20), and a fastening bolt is passed through the connecting through hole. The auxiliary support plate (20) is detachably connected to the side formwork (5) via the fastening bolt.

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