CN211772881U - A prefabricated box girder formwork - Google Patents

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, a left outer formwork, a right outer formwork and an inner membrane, respectively clamping the lower ends of the left outer formwork and the right outer formwork to the bottom plate. The upper and lower molds in the inner film are clamped on the two ends of the inner film respectively, and the second The screws are fixed, and the inner membrane is placed inside the left outer template and the right outer template. When the utility model needs to be disassembled, the pull rod, the support beam, the left outer template and the right outer template are removed in turn, and the second screw is screwed. , so that both the upper mold and the lower mold are separated from the inner film, and the screw in the inner film is rotated, so that the distance between the upper mold and the lower mold is shortened, and it is convenient to take out the upper mold and the lower mold, and then take out the inner film to avoid The inner membrane damages the prefabricated box girder, which is easy to remove and use.

Description

A prefabricated box girder formwork

technical field

The utility model relates to the technical field of box girder prefabrication, in particular to a prefabricated box girder formwork.

Background technique

Box girder is a kind of beam in bridge engineering. The interior is hollow, and there are flanges on both sides of the upper part, which are similar to boxes, hence the name. Its types are divided into single box, multi-box, etc., reinforced concrete box girder It is one of the important structures of the building, which is divided into prefabricated box girder and cast-in-place box girder according to the concrete pouring method. Among them, the cast-in-place box girder refers to the direct pouring of the box girder at the construction site, and the prefabricated box girder refers to the prefabricated box girder in the independent site in advance. The substructure of the bridge should be hoisted after completion, because prefabricated box girders can effectively avoid construction cross-interference, greatly improve the progress of the project, and save construction time. Therefore, prefabricated box girders are widely used;

The commonly used formwork schemes for pouring prefabricated box beams include wood formwork, ordinary composite steel formwork and customized steel formwork. The appearance quality of concrete cannot be guaranteed, and it is only suitable for small bridge projects with lower requirements. Although the rigidity of ordinary composite steel formwork is higher than that of wood formwork, it needs various specifications of formwork for combination and matching, which is difficult to assemble and the efficiency of formwork assembly and disassembly is still relatively high. Low cost, many joints, the appearance quality of concrete cannot be guaranteed, and it cannot be applied to large bridge projects with a short construction period. Although the one-time investment cost of the shaped steel formwork scheme is high, the formwork has good integrity and high rigidity. Mechanical assistance can be used for the assembly and disassembly of the formwork. , the construction efficiency is greatly improved, therefore, the stereotyped steel formwork scheme is most frequently used in the actual prefabricated box girder;

However, in the actual operation process, after the prefabricated box girder is poured, the formwork needs to be removed one by one. However, when the inner formwork is removed, since most of the inner membrane panels adopt an integrated design, there is often a problem that it is difficult to remove. It is easy to damage the pouring parts, which is inconvenient to use, and due to the large volume of the prefabricated box girder, the existing formwork often has the problem of insufficient stability when pouring, which affects the quality of the pouring.

Utility model content

The purpose of the present invention is to provide a prefabricated box girder formwork to solve the problems of inconvenient removal of the inner membrane and poor stability proposed in the above-mentioned background art.

In order to achieve the above purpose, the utility model provides the following technical solutions: including a base, a left outer template, a right outer template and an inner membrane, a bottom plate is installed on the middle position of the upper surface of the base, and the left outer template and the right outer template are installed. The lower end of the base plate is provided with a clamping plate, the clamping plate is clamped on both sides of the bottom plate, a pull rod is arranged between the upper end of the left outer template and the right outer template, and the upper surface of the base is located on the upper end of the base plate. Plug sockets are fixedly installed on both sides of the bottom plate, support beams are plugged in the socket sockets, and the inner membrane is located inside and in the middle of the left outer formwork and the right outer formwork.

Preferably, the bottom plate is a cross structure, and the clamping plate is a U-shaped structure, first threaded holes are evenly opened on both sides of the bottom plate, and a first screw is threaded in the first threaded hole, and the The outer side of the first screw penetrates the card board and extends to the outside of the card board.

Preferably, the support beam includes a support plate, the lower end of the support plate is inserted into the socket, the upper end of the support plate is fixedly installed with a horizontal plate, and both sides of the horizontal plate are fixedly installed with Diagonal braces, the lower ends of the diagonal braces are fixedly installed at the middle positions on both sides of the support plate, and the upper surfaces of the transverse plates are all in contact with the lower surfaces of the left outer formwork and the right outer formwork.

Preferably, both ends of the tie rod penetrate through the left outer template and the right outer template respectively, and both ends of the tie rod are threadedly connected with nuts.

Preferably, the inner film includes an inner film, an upper mold and a lower mold, second threaded holes are opened on both sides of the upper mold and the lower mold, and a second screw is threadedly connected to the second threaded hole One end of the second screw penetrates the upper mold and the lower mold and is threadedly connected with the inner film, and a screw rod is fixedly installed between the upper mold and the lower mold.

Preferably, the upper mold and the lower mold are both convex structures, and the length of the upper mold is greater than the length of the lower mold.

Preferably, the number of the inner film is two, and the inner film has an arc-shaped structure, and two ends of the inner film are respectively clamped to one side of the upper mold and the lower mold.

Technical effects and advantages of the present utility model:

1. The inner film in the present invention adopts the inner film, the upper mold and the lower mold to carry out a combined design. After the pouring is completed, it is convenient to remove the upper mold and the lower mold in the inner film through the lead screw, and then it is convenient for the inner film. The membrane is removed, which is convenient to use, and greatly reduces the difficulty of removing the inner membrane, avoiding damage to the casting during the removal process;

2. The utility model is provided with support beams, clamping plates and tie rods to effectively fix the left outer formwork and the right outer formwork to avoid the dislocation of the utility model during the pouring process, and to increase the stability of the utility model, and then Improve the quality of prefabricated box girder and improve the pouring quality;

3. The utility model is easy to assemble, easy to reuse, easy to disassemble, and greatly improves the production progress and production quality of the prefabricated box girder.

Description of drawings

FIG. 1 is a schematic diagram of the structure of the present invention.

FIG. 2 is a front sectional view of the utility model.

FIG. 3 is a schematic diagram of the structure of the upper film in the utility model.

FIG. 4 is a schematic structural diagram of a middle bottom plate of the present invention.

FIG. 5 is a front cross-sectional view of the intima of the present invention.

In the picture: 1. Base; 2. Left outer template; 3. Right outer template; 4. Inner membrane; 5. Bottom plate; 6. Clamping plate; 7. Pull rod; 8. Plug socket; 9. Support beam; The first threaded hole; 11, the first screw; 12, the support plate; 13, the horizontal plate; 14, the diagonal brace; 15, the nut; 16, the inner film; 17, the upper die; 18, the lower die; hole; 20, the second screw; 21, the screw.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The utility model provides a prefabricated box girder formwork as shown in Figures 1-5, comprising a base 1, a left outer formwork 2, a right outer formwork 3 and an inner membrane 4, and a bottom plate 5 is installed on the middle position of the upper surface of the base 1, The lower ends of the left outer template 2 and the right outer template 3 are provided with clamping plates 6, the clamping plates 6 are clamped on both sides of the bottom plate 5, and a pull rod 7 is provided between the upper ends of the left outer template 2 and the right outer template 3, and the pull rod 7 The two ends of the bottom plate respectively penetrate the left outer template 2 and the right outer template 3, and both ends of the tie rod 7 are screwed with nuts 15, and the upper surface of the base 1 is located on both sides of the bottom plate 5. The sockets 8 are fixedly installed. A support beam 9 is inserted into the seat 8, and the inner membrane 4 is located inside and in the middle of the left outer formwork 2 and the right outer formwork 3;

The support beam 9 includes a support plate 12, the lower end of the support plate 12 is inserted into the socket 8, the upper end of the support plate 12 is fixedly installed with a horizontal plate 13, and diagonal braces 14 are fixedly installed on both sides of the horizontal plate 13. The lower ends of 14 are fixedly installed at the middle positions on both sides of the support plate 12, and the upper surfaces of the transverse plates 13 are all in contact with the lower surfaces of the left outer formwork 2 and the right outer formwork 3;

The inner film 4 includes an inner film 16, an upper mold 17 and a lower mold 18. The number of the inner film 16 is two, and the inner film 16 is an arc structure. The two ends of the inner film 16 are respectively clamped to the upper mold 17 and the lower mold. On one side of 18, the upper die 17 and the lower die 18 are provided with second threaded holes 19 on both sides, the second threaded holes 19 are threadedly connected with second screws 20, and one end of the second screws 20 penetrates the upper die 17 and the lower die 18. The lower mold 18 is screwed with the inner film 16 , and a screw rod 21 is fixedly installed between the upper mold 17 and the lower mold 18 .

As shown in Figures 3 and 4, the bottom plate 5 is a cross structure, the clamping plate 6 is a U-shaped structure, the two sides of the bottom plate 5 are evenly provided with first threaded holes 10, and the first threaded holes 10 are internally threaded with first screws 11. The outer side of the first screw 11 penetrates through the clamping plate 6 and extends to the outside of the clamping plate 6 .

The working principle of the utility model: when the utility model is used, the clamping plates 6 at the lower ends of the left outer template 2 and the right outer template 3 are respectively clamped on the bottom plate 5, and the first screws 11 are passed through the clamping plates. 6. Threaded on the first threaded hole 10, so that the clamping plate 6 and the bottom plate 5 are fixed to each other, the support beam 9 is inserted into the socket 8, and the support beam 9 includes the support plate 12, the horizontal plate 13 and the The upper surfaces of the inclined plate 14 and the horizontal plate 13 are in contact with the lower surfaces of the left outer formwork 2 and the right outer formwork 3 respectively, so that the support beam 9 supports the left outer formwork 2 and the right outer formwork 3. The nut 15 fixes the distance between the upper ends of the left outer template 2 and the right outer template 3, further increases the stability of the left outer template 2 and the right outer template 3, and clamps the upper mold 17 and the lower mold 18 in the inner film 4 respectively. Connected to both ends of the inner film 16, and through the second screw 20, the upper mold 17 and the lower mold 18 are both threadedly connected to the inner film 16, and the inner film 4 is placed inside the left outer template 2 and the right outer template 3. , carry out the pouring of the prefabricated box girder, when the pouring is completed, and the utility model needs to be disassembled, screw the nut 15, so that the pull rod 7 is removed from the left outer formwork 2 and the right outer formwork 3, and screw the first screw 11. Make the clamping plate 6 and the bottom plate 5 detached from each other, slide and remove the support beam 9 to facilitate the disassembly and assembly of the left outer template 2 and the right outer template 3, and turn the second screw 20 to make the upper mold 17 and the lower mold. 18 are separated from the inner film 16, and the lead screw 21 in the inner film 4 is rotated to shorten the distance between the upper mold 17 and the lower mold 18, thereby facilitating the separation of the upper mold 17 and the lower mold 18 from the prefabricated box beam. , it is convenient to take out the upper mold 17 and the lower mold 18, and then take out the inner film 16, and then it is convenient to take out the inner film 4 from the interior of the prefabricated box girder, so as to avoid damage to the prefabricated box girder by the inner film 4, which is easy to remove and easy to use.

Finally, it should be noted that the above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. , it can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some of its technical features, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model, All should be included within the protection scope of the present invention.

Claims (7)

1. A prefabricated box girder formwork, comprising a base (1), a left outer formwork (2), a right outer formwork (3) and an inner membrane (4), characterized in that: the middle position of the upper surface of the base (1) A bottom plate (5) is installed, and the lower ends of the left outer template (2) and the right outer template (3) are provided with a clamping plate (6), and the clamping plate (6) is clamped on the bottom plate (5). ), a tie rod (7) is provided between the upper end of the left outer formwork (2) and the right outer formwork (3), and the upper surface of the base (1) is located on the bottom of the bottom plate (5). Plug sockets (8) are fixedly installed on both sides, a support beam (9) is plugged in the socket socket (8), and the inner membrane (4) is located between the left outer template (2) and all the Describe the inner and middle position of the right outer template (3). 2. A prefabricated box girder formwork according to claim 1, characterized in that: the bottom plate (5) is a cross structure, and the clamping plate (6) is a U-shaped structure, and the bottom plate (5) has a cross-shaped structure. A first threaded hole (10) is evenly opened on both sides, the first threaded hole (10) is internally threaded with a first screw (11), and the outer side of the first screw (11) penetrates the clamping plate (6). ) and extend to the outside of the card board (6). 3. A prefabricated box girder formwork according to claim 1, characterized in that: the support beam (9) comprises a support plate (12), and the lower end of the support plate (12) is plugged into the plug-in connection Inside the seat (8), a transverse plate (13) is fixedly installed on the upper end of the support plate (12), and diagonal braces (14) are fixedly installed on both sides of the horizontal plate (13). ) are fixedly installed at the middle positions on both sides of the support plate (12), and the upper surface of the horizontal plate (13) is connected to the left outer formwork (2) and the right outer formwork (3). contact with the lower surface. 4. A prefabricated box girder formwork according to claim 1, characterized in that: both ends of the tie rod (7) respectively penetrate the left outer formwork (2) and the right outer formwork (3), and Both ends of the tie rod (7) are screwed with nuts (15). 5. A prefabricated box girder formwork according to claim 1, wherein the inner film (4) comprises an inner film (16), an upper mold (17) and a lower mold (18), the upper mold (17) Second threaded holes (19) are opened on both sides of the lower die (18), the second threaded holes (19) are internally threadedly connected with a second screw (20), and the second screw One end of (20) penetrates the upper mold (17) and the lower mold (18) and is screwed with the inner film (16), the upper mold (17) and the lower mold (18) A screw rod (21) is fixedly installed therebetween. 6. A prefabricated box girder formwork according to claim 5, wherein the upper die (17) and the lower die (18) are both convex structures, and the upper die (17) has a The length is greater than the length of the lower die (18). 7 . The prefabricated box girder formwork according to claim 5 , wherein the number of the inner membranes ( 16 ) is two, and the inner membrane ( 16 ) is an arc structure, and the inner membrane Both ends of (16) are clamped on one side of the upper mold (17) and the lower mold (18) respectively.

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