Cantilever casting continuous box girder end formwork fixing device

Abstract

The utility model relates to the technical field of building construction, in particular to a cantilever casting continuous box girder end formwork fixing device which comprises a web steel formwork, a channel steel positioning seat and an end formwork fixing clamp, one end of the channel steel positioning seat is fixedly arranged on the side wall of the web steel formwork, and a split bolt is arranged between the other end of the channel steel positioning seat and the end formwork fixing clamp. The split bolt comprises connecting screw rods and an adjusting nut, the adjusting nut is hollow, the two ends of the interior of the adjusting nut are in threaded connection with the connecting screw rods respectively, the connecting screw rod at one end is in threaded connection with the channel steel positioning seat, and the connecting screw rod at the other end is in threaded connection with the end formwork fixing clamp. The end formwork fixing clamp abuts against the end formwork. By rotating the adjusting nut, the end formwork is stably clamped and fixed, displacement or deformation of the end formwork during concrete pouring is prevented, the device can adapt to the tops of the end formworks of different sizes, and the application range of the device is widened.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically a cantilever casting continuous box girder end formwork fixing device. Background Technology

[0002] In modern bridge construction, the cantilever casting continuous box girder construction technique is widely used. This method allows for the efficient construction of large bridge structures without disrupting traffic or the surrounding environment. However, the quality and precision of this construction technique largely depend on the stability of the end formwork, as its stability directly affects the overall quality and dimensional accuracy of the box girder, thus influencing the bridge's structural performance and service life.

[0003] In existing cantilever continuous box girder construction, the end formwork is fixed by welding it directly to the web of the box girder or other supporting components to prevent displacement during concrete pouring. Alternatively, simple rigid supports, such as timber or steel pipes, are used to hold the formwork in place and maintain its stability.

[0004] However, for some complex shapes or large-sized end templates, simple welding or support structures are difficult to meet their fixing requirements and cannot guarantee the stability of the template under various working conditions, thus limiting its application range in different projects. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a fixing device for the end formwork of a cantilevered continuous box girder, which solves the problem of formwork instability when fixing end formwork of different shapes and sizes.

[0006] To achieve the above objectives, according to an embodiment of the first aspect of this utility model, a cantilever casting continuous box girder end formwork fixing device is provided, comprising a web steel formwork, a channel steel positioning seat, and an end formwork fixing clamp. One end of the channel steel positioning seat is fixedly disposed on the side wall of the web steel formwork, and a tie bolt is disposed between the other end and the end formwork fixing clamp. The tie bolt includes a connecting screw and an adjusting nut. The adjusting nut is hollow, and the connecting screw is threaded to both ends of the adjusting nut. One end of the connecting screw is threadedly connected to the channel steel positioning seat, and the other end of the connecting screw is threadedly connected to the end formwork fixing clamp. The end formwork fixing clamp is used to abut against the end formwork.

[0007] As a further embodiment of this utility model: the end template fixing clamp includes a channel steel body and a template back rib, the channel steel body is fixedly disposed with the template back rib, and a plurality of the channel steel bodies are horizontally placed on the template back rib, the template back rib abutting against the side wall of the end template.

[0008] As a further embodiment of this utility model: threaded holes are provided at both ends of the channel steel body, and the threaded holes are threadedly connected to the connecting screw at one end.

[0009] As a further embodiment of this utility model: the side wall of the web steel mold is provided with positioning holes, and the channel steel positioning seat is fixedly connected to the web steel mold with bolts through the positioning holes.

[0010] As a further embodiment of this utility model, the channel steel positioning seat is composed of two channel steel pieces welded and fixed together.

[0011] As a further embodiment of this utility model: the channel steel on one side is bolted to the web plate steel mold, and the channel steel on the other side is threaded to the connecting screw.

[0012] As a further embodiment of this utility model: limit nuts are respectively provided on the connecting screws at both ends, and the limit nuts limit the displacement of the connecting screws.

[0013] As a further embodiment of this utility model, multiple sets of tie bolts are provided between the channel steel positioning seat and the end template fixing clamp.

[0014] As a further embodiment of this utility model: the channel steel body is placed horizontally on multiple sets of template back ribs.

[0015] As a further embodiment of this utility model: the channel steel body is welded and fixed to the template back rib.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model uses the rotating adjusting nut to move the connecting screw within the adjusting nut, thereby adjusting the length of the tie bolt and tightening the end template fixing clamp. This ensures that the template back rib is tightly abutted against the side wall of the end template, providing a stable clamping and fixing of the end template. This prevents the end template from shifting or deforming during concrete pouring and can adapt to the top of end templates of different sizes, thus improving the applicability of the equipment. Attached Figure Description

[0018] Figure 1 This is a front view of the installation of a formwork fixing device for the end of a cantilevered continuous box girder.

[0019] Figure 2 This is a schematic diagram of the installation of the end template fixing clip.

[0020] Figure 3 This is a cross-sectional view of a tie bolt.

[0021] The attached figures are labeled as follows: 1. Web steel formwork; 2. Channel steel positioning seat; 3. End template fixing clamp; 31. Channel steel body; 311. Threaded hole; 32. Template back rib; 4. Tie bolt; 41. Connecting screw; 42. Adjusting nut; 5. Limit nut; 6. End template. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] like Figures 1 to 3 As shown, a cantilever casting continuous box girder end formwork fixing device includes a web steel formwork 1, a channel steel positioning seat 2, and an end formwork fixing clamp 3. One end of the channel steel positioning seat 2 is fixedly mounted on the side wall of the web steel formwork 1, and the other end is provided with a tie bolt 4 between it and the end formwork fixing clamp 3. The tie bolt 4 includes a connecting screw 41 and an adjusting nut 42. The adjusting nut 42 is hollow, and the connecting screw 41 is threaded to both ends of the adjusting nut 42. One end of the connecting screw 41 is threadedly connected to the channel steel positioning seat 2, and the other end of the connecting screw 41 is threadedly connected to the end formwork fixing clamp 3. The end formwork fixing clamp 3 abuts against the end formwork 6.

[0024] By rotating the adjusting nut 42, the connecting screw 41 moves within the adjusting nut 42, thereby adjusting the length of the tie bolt 4 and tightening the end template fixing clamp 3. This ensures that the template back rib 32 is tightly abutted against the side wall of the end template 6, providing a stable clamping and fixing of the end template 6. This prevents the end template 6 from shifting or deforming during concrete pouring and allows the equipment to adapt to the top of end templates 6 of different sizes, thus improving the applicability of the equipment.

[0025] The end template fixing clamp 3 includes a channel steel body 31 and a template back rib 32. The channel steel body 31 is fixedly installed with the template back rib 32, and several channel steel bodies 31 are horizontally placed on the template back rib 32. The template back rib 32 abuts against the side wall of the end template 6.

[0026] The end template fixing clamp 3 consists of a channel steel body 31 and a template back rib 32. The channel steel body 31 is placed horizontally on the template back rib 32 and the two are fixedly installed. The channel steel body 31 serves to connect the tie bolts 4 and support the template back rib 32. The template back rib 32 directly abuts against the side wall of the end template 6, transferring the tension of the tie bolts 4 to the end template 6, thereby clamping the end template 6.

[0027] The channel steel body 31 has threaded holes 311 at both ends, and the threaded holes 311 are threadedly connected to the connecting screw 41 at one end. The threaded holes 311 at both ends of the channel steel body 31 are threadedly connected to the connecting screw 41 of the tie bolt 4. Through the threaded engagement, the tie bolt 4 and the channel steel body 31 are detachably connected, so that the tie bolt 4 can apply tension to the channel steel body 31, thereby driving the template back rib 32 to clamp the end template 6.

[0028] The side wall of the web steel mold 1 is provided with positioning holes, and the side wall of the channel steel positioning seat 2 is bolted to the positioning holes. The positioning holes provided on the side wall of the web steel mold 1 are used for bolting to the channel steel positioning seat 2. Through the cooperation of the positioning holes and bolts, the channel steel positioning seat 2 is accurately installed on the web steel mold 1, providing a stable installation foundation for the entire fixing device.

[0029] The channel steel positioning seat 2 is composed of two channel steels welded and fixed together. One side of the channel steel is bolted to the web plate steel mold 1, and the other side of the channel steel is threaded to the connecting screw 41.

[0030] The channel steel positioning seat 2 is composed of two channel steel pieces welded together. Welding connects the two channel steel pieces into a single unit, giving it sufficient strength and stability to withstand the tensile force transmitted by the tie bolts 4, providing reliable support for the fixing device. One side of the channel steel is bolted to the web steel mold 1, providing fixed support for the channel steel positioning seat 2; the other side of the channel steel is threaded to the connecting screw 41, used to transmit the tensile force of the tie bolts 4, enabling the channel steel positioning seat 2 to stably transmit the force of the tie bolts 4 to the end template fixing clamp 3.

[0031] Limiting nuts 5 are respectively provided on the connecting screws 41 at both ends, and the limiting nuts 5 restrict the displacement of the connecting screws 41. By tightening the limiting nuts 5, the displacement of the connecting screws 41 can be limited, preventing the connecting screws 41 from being excessively screwed in or out during the adjustment process, avoiding the tie bolts 4 from disengaging from the channel steel positioning seat 2 or the end template fixing clamp 3, and ensuring the connection stability of the fixing device.

[0032] Multiple sets of tie bolts 4 are provided between the channel steel positioning seat 2 and the end template fixing clamp 3. By applying tension simultaneously through multiple sets of tie bolts 4, the end template fixing clamp 3 can apply clamping force to the end template 6 more evenly, thereby improving the fixing effect of the end template 6.

[0033] The channel steel body 31 is horizontally placed on multiple sets of template back ribs 32. This layout increases the contact area between the channel steel body 31 and the template back ribs 32, allowing the channel steel body 31 to more evenly transfer the tension of the tie bolts 4 to the template back ribs 32, thereby clamping the end template 6 more effectively.

[0034] The channel steel body 31 is welded and fixed to the template back rib 32, so that the channel steel body 31 and the template back rib 32 form a solid whole, which can better transmit the tensile force of the tie bolt 4 and improve the overall strength and stability of the end template fixing clamp 3.

[0035] The working principle of this utility model is as follows: First, one end of the channel steel positioning seat 2 is fixed to the positioning hole of the web steel mold 1 through the bolt on its side wall, so that the channel steel positioning seat 2 is stable on the web steel mold 1. The channel steel positioning seat 2 is composed of two welded and fixed channel steels. One side is connected to the web steel mold 1 to provide support, and the other side is used to connect the tie bolt 4. The adjusting nut 42 of the tie bolt 4 is hollow, and two connecting screws 41 are threaded to both ends of the inside. One end of the screw is threaded to the channel steel positioning seat 2, and the other end is connected to the threaded holes 311 at both ends of the channel steel body 31 of the end template fixing clamp 3. The end template fixing clamp 3 is composed of the channel steel body 31 that is horizontally placed on the template back rib 32 and welded and fixed. The template back rib 32 abuts against the side wall of the end template 6. The length of the tie bolt 4 is adjusted by rotating the adjusting nut 42 to move the connecting screw 41, thereby tightening the end template fixing clamp 3, so that the template back rib 32 tightly abuts against the end template 6, preventing displacement and deformation, and can adapt to end templates 6 of different sizes, ensuring the construction quality of the box girder.

[0036] The above embodiments are only used to illustrate the technical methods of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of this utility model without departing from the spirit and scope of the technical methods of this utility model.

Claims

1. A cantilever casting continuous box girder end formwork fixing device, comprising a web steel formwork (1), a channel steel positioning seat (2) and an end formwork fixing clamp (3), wherein one end of the channel steel positioning seat (2) is fixedly mounted on the side wall of the web steel formwork (1), and the other end is provided with a tie bolt (4) between it and the end formwork fixing clamp (3); Its features are, The tie bolt (4) includes a connecting screw (41) and an adjusting nut (42). The adjusting nut (42) is hollow, and the connecting screw (41) is threaded to both ends of the adjusting nut (42). One end of the connecting screw (41) is threaded to the channel steel positioning seat (2), and the other end of the connecting screw (41) is threaded to the end template fixing clamp (3). The end template fixing clamp (3) is used to abut against the end template (6).

2. The cantilever casting continuous box girder end formwork fixing device according to claim 1, characterized in that, The end template fixing clamp (3) includes a channel steel body (31) and a template back rib (32). The channel steel body (31) is fixedly installed with the template back rib (32), and several channel steel bodies (31) are horizontally placed on the template back rib (32). The template back rib (32) abuts against the side wall of the end template (6).

3. The cantilever casting continuous box girder end formwork fixing device according to claim 2, characterized in that, The channel steel body (31) has threaded holes (311) at both ends, and the threaded holes (311) are threadedly connected to the connecting screw (41) at one end.

4. The cantilever casting continuous box girder end formwork fixing device according to claim 1, characterized in that, The side wall of the web steel mold (1) is provided with positioning holes, and the channel steel positioning seat (2) is bolted to the web steel mold (1) through the positioning holes.

5. The cantilever casting continuous box girder end formwork fixing device according to claim 1, characterized in that, The channel steel positioning seat (2) is composed of two channel steel pieces fixed together.

6. A cantilever casting continuous box girder end formwork fixing device according to claim 5, characterized in that, One side of the channel steel is bolted to the web plate steel mold (1), and the other side of the channel steel is threaded to the connecting screw (41).

7. The cantilever casting continuous box girder end formwork fixing device according to claim 1, characterized in that, Limiting nuts (5) are provided on the connecting screws (41) at both ends, and the limiting nuts (5) limit the displacement of the connecting screws (41).

8. The cantilever casting continuous box girder end formwork fixing device according to claim 1, characterized in that, Multiple sets of tie bolts (4) are provided between the channel steel positioning seat (2) and the end template fixing clamp (3).

9. A cantilever casting continuous box girder end formwork fixing device according to claim 2, characterized in that, The channel steel body (31) is placed horizontally on multiple sets of template back ribs (32).

10. A cantilever casting continuous box girder end formwork fixing device according to claim 9, characterized in that, The channel steel body (31) is welded and fixed to the template back rib (32).

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