A device for controlling the appearance and alignment of cast-in-place box girders.

Abstract

This utility model relates to the field of auxiliary equipment technology for box girder construction, and in particular to a device for controlling the appearance and alignment of cast-in-place box girders. It addresses the technical problem of the lack of convenient, modular box girder linear control devices in the prior art to improve construction efficiency. The device uses an inclined support end of a linearity-maintaining mechanism to support the web formwork, providing a standard structural slope for the web formwork and ensuring precision control. During web formwork assembly, a drive cylinder is used in conjunction with the inclined support end to set the slope. Pre-positioning is achieved by equidistantly configuring preset positioning points, reducing reliance on gantry cranes or crane suspension and manual traction for actual linear control. This better controls the linearity of the box girder and ensures accuracy. It is suitable for both single-box single-cell and single-box double-cell configurations, employing a more direct slope control method to guarantee linear accuracy and improve construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary equipment technology for box girder construction, and in particular to a device for controlling the appearance and alignment of cast-in-place box girders. Background Technology

[0002] Controlling the appearance and alignment of cast-in-place box girders is a key aspect of ensuring the aesthetics and functionality of bridge structures, and requires comprehensive management from multiple aspects, including formwork construction, support system, and concrete pouring. The most significant factor affecting the appearance and alignment of box girders is the control of formwork construction. In reality, the requirements for formwork in box girder construction are not high, mainly focusing on pre-installation inspection. The control indicators mainly include centerline deviation, flatness, and verticality. By controlling the construction of the web and inner membrane through these indicators, it is possible to ensure no misalignment and reduce joints. However, as box girder construction technology progresses, the volume of box girders is gradually increasing. The inclination of the web shape will vary depending on the engineering design. The reason for this variation is that in the current technology, the single-box double-cell box girder is gradually being replaced by the single-box single-cell box girder, which means that the precision control of the box girder chamber part needs to be controlled by the precision of the external dimensions. Chinese utility model patent, publication number CN207904769U, patent title "An Adjustable Width Template Device", involves bolting vertical angle steel added to the edge of the bottom mold of the flange plate to a sliding steel plate on the side mold. By sliding the side mold of the flange plate, the width of the flange plate template can be adjusted, thereby adjusting the width of the top plate of the box girder, and thus adjusting the overall bridge's linear appearance to be smooth and aesthetically pleasing. The configuration of the cited patent is too complex to control the linear appearance, the construction is too cumbersome, and the efficiency of repeated construction is low. Existing technologies also lack convenient box girder linear control devices that can be used for modular construction to improve construction efficiency. Utility Model Content

[0003] This invention aims to address the technical problem of the lack of a convenient, modular, and efficient box girder linear control device in the existing technology, and provides a device for controlling the appearance and alignment of cast-in-place box girders.

[0004] To solve the above-mentioned technical problems, the specific technical solution of this utility model is as follows: A device for controlling the appearance and alignment of cast-in-place box girders, comprising: The control frame is fixedly installed on the railcar at the construction positions on both sides of the box girder; The control frame includes multiple parallel support plates; A linear retaining mechanism is provided, with one set of linear retaining mechanisms installed on each layer of the support plate, and the linear retaining mechanisms are configured at equal distances from the preset positioning points on each layer of the support plate. Each of the linear retaining mechanisms has a drive cylinder and an inclined support end, the drive cylinder being configured to cause the inclined support end to abut against the web template of the box girder.

[0005] Alternatively, the connection of the preset positioning points of each layer of the support plate forms a virtual inclined plane; The preset positioning point has a positioning center point; The slope of the virtual inclined plane is the same as the slope of the adjacent web template.

[0006] Optionally, the upper and lower adjacent support plates are arranged at equal intervals; The upper and lower adjacent support plates are supported and fixed by support columns.

[0007] Optionally, it also includes: A reaction force support mechanism, which is configured between the upper and lower adjacent support plates; The reaction force support mechanism includes: A reaction force support jack, one end of which is connected to a support rod, and the first end of the support rod is connected to an end support seat, which is used to abut against the lower end surface of the upper support plate.

[0008] Alternatively, the drive cylinder is fixedly connected to the support plate via a mounting lug; The output end of the drive cylinder faces the web template.

[0009] Alternatively, the inclined support end includes: An inclined support module, wherein the inclined support module has an inclined support part, and one end of the inclined support part has an inclined surface; The other end of the inclined support is connected to a neck.

[0010] Optionally, it also includes: Guide support components; The guide support component includes: A connector, one end of which is connected to the output end of the drive cylinder, and the other end of which is connected to the neck; A guide extension is connected to the lower part of the connector; A guide slide is connected below the guide extension.

[0011] Alternatively, a guide groove is provided on the support plate in the extending direction of the output end of the drive cylinder; The guide slider is confined within the guide groove, and moves along the guide groove when the drive cylinder is actuated.

[0012] This utility model has the following beneficial effects: This technical solution uses the inclined support end of the linear retaining mechanism to support the web formwork, and first provides a standard structural slope for the web formwork, providing precision control. Then, in conjunction with the web formwork assembly, a drive cylinder is used with the inclined support end to set the slope. The pre-positioning is provided by equidistant configuration of preset positioning points, which reduces the dependence of actual linear control on gantry cranes or crane suspension and manual traction, so as to better control the linearity of the box girder and ensure accuracy. It is suitable for both single box girder single-cell and single box girder double-cell, and the more direct slope control method ensures linear accuracy and improves construction efficiency. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the configuration structure of this utility model; Figure 2 This is a schematic diagram of the control framework of this utility model; Figure 3 This is a schematic diagram of the linear retaining mechanism of this utility model; Figure 4 This is a schematic diagram of the reaction force support mechanism of this utility model.

[0015] Control frame 10, box girder 1, construction position 2, track vehicle 3, support plate 101; Linear retaining mechanism 20, preset positioning point 102, drive cylinder 201; Inclined support end 202, web plate template 4; Virtual inclined plane 103, positioning center point 102a; 30 reaction support mechanism, 301 reaction support jack, 302 support rod, 303 end support seat; Mounting ear 21, tilting support module 220, tilting support part 221, tilting surface 222; Neck 223, Connector 230, Guide Extension 231, Guide Slider 232; Guide groove 240. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. It should be noted that, for ease of description, in this application, "left side" is referred to as "first end", "right side" as "second end", "upper side" as "first end", and "lower side" as "second end" in the current view. The purpose of such description is to clearly express the technical solution and should not be construed as an improper limitation of the technical solution of this application.

[0017] This invention aims to address the technical problem of the lack of a convenient, modular box girder linear control device in the existing technology to improve construction efficiency. It provides a device for controlling the appearance and alignment of cast-in-place box girders. Please refer to the appendix. Figure 1 , 2 As shown, the first factor considered in this technical solution is the modular and progressive construction method. It utilizes the existing technology of building tracks on both sides of the box girder 1. These tracks are mainly used for the operation of the railcar 3, and the railcar 3 has a braking function. This solution uses the railcar as the optimal implementation. If the railcar cannot be built, the control frame 10 is fixedly installed on the construction positions 2 on both sides of the box girder 1. It also needs to be disassembled and assembled for progressive construction. However, compared with the existing technology, it still has the advantages of improved construction efficiency, simplicity, and flexible assembly. The embodiment in which the control frame 10 is fixedly installed on the track vehicle 3 at the construction positions 2 on both sides of the box girder 1 is more preferred, making the push-type construction more efficient. Subsequently, the control frame 10 includes multiple parallel support plates 101; a linear retaining mechanism 20, with a set of linear retaining mechanisms 20 installed on each support plate 101, and the linear retaining mechanisms 20 are configured at equal distances from the preset positioning points 102 on each support plate 101; each set of linear retaining mechanisms 20 has a drive cylinder 201 and an inclined support end 202, the drive cylinder 201 forming an additional force to cause the inclined support end 202 to abut against the web template 4 of the box girder 1; This technical solution uses the inclined support end 202 of the linear retaining mechanism 20 to support the web template 4, and first provides a standard structural inclined surface for the web template 4 to provide precision control. Then, in conjunction with the web template 4 assembly, the drive cylinder 201 works with the inclined support end 202 to set the inclined surface. The position of the preset positioning point 102 is configured at equal distances to provide pre-positioning, which reduces the dependence of actual linear control on gantry crane or crane suspension and manual traction, so as to better control the linearity of the box girder 3 and ensure accuracy. It is suitable for single box girder single-cell and single box girder double-cell, and adopts a more direct slope control method to ensure linear accuracy and improve construction efficiency.

[0018] In one specific embodiment, please refer to Figure 2 As shown: the connection of the preset positioning points 102 of each support plate 101 forms a virtual inclined plane 103; the preset positioning points have a positioning center point 102a; the slope of the virtual inclined plane 103 is the same as the slope of the adjacent web template 4. That is, by using this method, the slope of the web can be directly configured from the frame, and after installing the linear retaining mechanism 20, the slope control can be directly achieved in one step.

[0019] In one specific embodiment, please refer to Figure 1 , 2 As shown: the upper and lower adjacent support plates 101 are arranged at equal intervals; The upper and lower adjacent support plates 101 are supported and fixed by support columns 104.

[0020] In one specific embodiment, please refer to Figure 4 As shown, it also includes a reaction support mechanism 30, which is configured between upper and lower adjacent support plates 101; the reaction support mechanism 30 includes a reaction support jack 301, one end of the reaction support jack 301 is connected to a support rod 302, the first end of the support rod 302 is connected to an end support seat 303, the end support seat 303 is used to abut against the lower end face of the upper support plate 101. When assembling the web template 4, in order to avoid bearing the load, the jack is used to form a reaction support to ensure the strength of the support.

[0021] In one specific embodiment, please refer to Figure 2 , 3 As shown, the drive cylinder 201 is fixedly connected to the support plate 101 via the mounting ear 21, and the output end of the drive cylinder 201 faces the web template 4.

[0022] In one specific embodiment, please refer to Figure 3As shown, the inclined support end 202 includes: an inclined support module 220, the inclined support module 220 having an inclined support part 221, one end of the inclined support part 221 having an inclined surface 222; the other end of the inclined support part 221 is connected to a neck 223, the inclined support part 221 is modularly pre-customized to ensure the uniformity of the inclined surface 222.

[0023] Since the web formwork 4 generates load-bearing requirements during construction, in a specific embodiment, please refer to... Figure 3 , 4 As shown: It also includes: a guide support component; the guide support component includes: a connecting body 230, one end of which is connected to the output end of the drive cylinder 201, and the other end of which is connected to the neck 223; a guide extension 231 is connected below the connecting body 230; a guide slide 232 is connected below the guide extension 231, so that the force is evenly distributed, and with the reaction force support of the jack, the strength is guaranteed when bearing the load; In one specific embodiment, in a further coordinated design, a guide groove 240 is provided on the support plate 101 in the extending direction of the output end of the drive cylinder 201; The guide slider 232 is confined within the guide groove 240, and when the drive cylinder 201 is activated, the guide slider 232 moves along the guide groove 240.

[0024] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A device for controlling the appearance and alignment of cast-in-place box girders, characterized in that, include: The control frame (10) is fixedly installed on the railcar (3) at the construction positions (2) on both sides of the box girder (1); The control frame (10) includes multiple parallel support plates (101). Linear retaining mechanism (20), a set of linear retaining mechanisms (20) is installed on each layer of the support plate (101), and the linear retaining mechanism (20) is configured at equal distances from the preset positioning point (102) on each layer of the support plate (101); Each of the linear retaining mechanisms (20) has a drive cylinder (201) and an inclined support end (202), the drive cylinder (201) forming an increase for causing the inclined support end (202) to abut against the web template (4) of the box girder (1).

2. The device for controlling the appearance and alignment of cast-in-place box girders as described in claim 1, characterized in that, The connection of the preset positioning points (102) of each layer of the support plate (101) forms a virtual inclined plane (103). The preset positioning point has a positioning center point (102a). The slope of the virtual inclined plane (103) is the same as the slope of the adjacent web template (4).

3. The device for cast-in-place box beam appearance line type control according to claim 1, characterized in that, The upper and lower adjacent support plates (101) are arranged at equal intervals; The upper and lower adjacent support plates (101) are supported and fixed by support columns (104).

4. The device for appearance line type control of cast-in-situ box girder according to claim 1, characterized in that, It also includes: A reaction force support mechanism (30) is configured between upper and lower adjacent support plates (101); The reaction support mechanism (30) includes: A reaction support jack (301) is provided, one end of which is connected to a support rod (302). The first end of the support rod (302) is connected to an end support seat (303), which is used to abut against the lower end face of the upper support plate (101).

5. The device for appearance line type control of cast-in-situ box girder according to claim 4, characterized in that, The drive cylinder (201) is fixedly connected to the support plate (101) by a mounting lug (21); The output end of the drive cylinder (201) is directed toward the web template (4).

6. The device for appearance line type control of cast-in-situ box girder according to claim 5, characterized in that, The inclined support end (202) includes: Inclined support module (220), the inclined support module (220) has an inclined support part (221), one end of the inclined support part (221) has an inclined surface (222); The other end of the inclined support (221) is connected to a neck (223).

7. The device for appearance line type control of cast-in-situ box girder according to claim 6, characterized in that, It also includes: Guide support components; The guide support component includes: The connector (230) has one end connected to the output end of the drive cylinder (201) and the other end connected to the neck (223). A guide extension (231) is connected to the lower part of the connector (230). A guide slide (232) is connected below the guide extension (231).

8. The device for appearance line type control of cast-in-situ box girder according to claim 7, characterized in that, A guide groove (240) is provided on the support plate (101) in the extending direction of the output end of the drive cylinder (201). The guide slider (232) is confined within the guide groove (240), and when the drive cylinder (201) is actuated, the guide slider (232) moves along the guide groove (240).

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