A temporary support for bridge construction

Abstract

This utility model provides a temporary support for bridge construction, including a temporary support body, a box girder, and a vehicular bridge section. The temporary support body is set on the vehicular bridge section and includes two parallel temporary support sections. The temporary support includes a first column steel pipe, a second column steel pipe, and a horizontal beam. The first column steel pipe and the second column steel pipe are fixed to the lower end of the horizontal beam by welding. Several adjusting steel pipes are set on the upper surface of the horizontal beam. The lower end of the box girder abuts against the upper surface of the adjusting steel pipes. By setting a horizontal beam with several adjusting steel pipes on the upper surface, the bottom surface of the box girder directly abuts against the upper surface of the adjusting steel pipes, eliminating the process of repeatedly padding with steel plates during construction and improving support efficiency. By directly setting the temporary support body on the vehicular bridge section and adopting a frame structure of double column steel pipes and horizontal beams, graded load transfer can be achieved, protecting the vehicular bridge deck.

Description

Technical Field

[0001] This utility model relates to the technical field of temporary supports, and in particular to a temporary support for bridge construction. Background Technology

[0002] In bridge construction, temporary supports are crucial for supporting the casting, splicing, and load transfer of box girders. Traditional temporary supports often employ a frame structure of steel pipe columns and steel beams, but in actual construction, they face the following technical shortcomings: 1. Insufficient adaptability to box girder support: Conventional supports are designed with a horizontal top surface, while box girders are prone to non-uniform deformation (such as deflection) under their own weight and construction loads. This leads to gaps or localized stress concentrations between the bottom surface of the box girder and the supports, requiring manual adjustment with steel plates, which is not only inefficient but also affects the structural safety. 2. Inadequate bridge deck protection measures: When the steel pipe columns directly act on the vehicular bridge section (such as the existing bridge deck or piers), there is a lack of effective load distribution and buffering mechanisms, which can easily cause bridge deck damage or localized cracking, especially with significant settlement risks in soft soil foundation conditions. 3. Limited structural stability: Parallel support units often rely on simple lateral connections, resulting in weak resistance to lateral overturning. Under wind loads or asymmetrical construction loads, the support frame is prone to instability, requiring additional diagonal bracing, which increases material and erection costs. Utility Model Content

[0003] In view of the shortcomings and defects of the existing technology, a temporary support for bridge construction is provided. In order to achieve a better supporting effect when installing box girders, the present invention provides the following technical solution.

[0004] A temporary support for bridge construction includes a temporary support body, a box girder, and a vehicular bridge section. The temporary support body is installed on the vehicular bridge section and includes two parallel temporary support sections. The temporary support includes a first column steel pipe, a second column steel pipe, and a horizontal beam. The first column steel pipe and the second column steel pipe are fixed to the lower end of the horizontal beam by welding. A plurality of adjusting steel pipes are provided on the upper surface of the horizontal beam. The lower end of the box girder abuts against the upper surface of the adjusting steel pipes.

[0005] Compared with existing technologies, by setting up horizontal beams with several adjustable steel pipes on the upper surface, the bottom surface of the box girder directly abuts against the upper end of the adjustable steel pipes, eliminating the process of repeatedly padding with steel plates during construction and improving support efficiency; by setting the main body of the temporary support directly on the vehicular bridge section and adopting a frame structure of double-column steel pipes and horizontal beams, graded load transfer can be achieved, protecting the vehicular bridge surface.

[0006] Furthermore, the adjusting steel pipe includes a sand box and a steel pipe fitting. The steel pipe fitting is inserted into the sand box. A limiting block is provided on one side of the steel pipe fitting, and a limiting groove is provided on one side of the sand box. The limiting block is inserted into the limiting groove. The sand box is filled with sand, and a bolt seal is provided on the side of the sand box away from the limiting groove.

[0007] With the above improvements, the adjustable steel pipe includes steel pipe fittings and a sand box. The steel pipe fittings can slide up and down in the sand box, thereby changing the overall height of the adjustable steel pipe. A limit groove is provided on one side of the sand box, and a limit block is provided on one side of the steel pipe fittings, which can keep the steel pipe fittings vertical when they are raised and lowered in the sand box. A bolt seal is provided on the sand box to facilitate the removal of filling sand when the steel pipe fittings move in the sand box.

[0008] Furthermore, the height of the adjustable steel pipe extending from both sides gradually increases towards the center.

[0009] Through the above improvements, the height of the adjustable steel pipe gradually increases from both sides to the middle, which can better support the box girder during installation and make the overall stress of the temporary support uniform.

[0010] Furthermore, the lower ends of the first column steel pipe and the second column steel pipe are provided with column bottom distribution beams, the column bottom distribution beams are installed on the upper surface of the vehicular bridge section, and a layer of sand and gravel is laid between the vehicular bridge section and the column bottom distribution beams.

[0011] Through the above improvements, a column base distribution beam is set at the lower end of the first column steel pipe and the second column steel pipe, which can increase the bearing area of ​​the temporary support, make the overall stress of the temporary support uniform, and enhance the overall stability of the temporary support. A layer of sand and gravel is laid between the bridge section and the column base distribution beam, so that the lower end of the column base distribution beam remains horizontal during installation, and the box girder always remains horizontal during installation.

[0012] Furthermore, a column bottom sealing plate is provided between the first column steel pipe and the second column steel pipe and the column bottom distribution beam, and a column top sealing plate is provided between the first column steel pipe and the second column steel pipe and the horizontal beam.

[0013] Through the above improvements, a column bottom sealing plate is installed between the first and second column steel pipes and the column bottom distribution beam, and a column top sealing plate is installed between the first and second column steel pipes and the horizontal beam. The column bottom sealing plate and column top sealing plate increase the contact area between the first and second column steel pipes and the distribution beam, effectively dispersing the load pressure, avoiding local stress concentration, improving the overall stability of the structure, and preventing the first and second column steel pipes from directly contacting the distribution beam and causing wear.

[0014] Furthermore, the temporary support body includes a connecting beam, which is disposed between the horizontal beams, and both ends of the connecting beam are welded and fixed to the horizontal beams. A first support truss is fixedly disposed between the parallel temporary supports.

[0015] Through the above improvements, by welding connecting beams between horizontal beams and setting first support trusses between temporary supports, the parallel temporary supports can be better fixed, thus improving the overall stability of the installation.

[0016] Furthermore, a second supporting truss is provided between the first column steel pipe and the second column steel pipe.

[0017] Through the above improvements, a second supporting truss is installed between the first and second column steel pipes, which can greatly improve the supporting effect of the first and second column steel pipes.

[0018] Furthermore, connecting parts are welded between the upper ends of the box girders.

[0019] Through the above improvements, connectors are welded between the upper ends of the box girders to ensure stability between them and prevent shaking during installation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the installation structure of a temporary support for bridge construction.

[0021] Figure 2 This is a frontal view of the structure of a temporary support for bridge construction.

[0022] Figure 3 A top-view structural diagram of a temporary support structure used in bridge construction;

[0023] Figure 4 This is a side view structural diagram of a temporary support structure used in bridge construction.

[0024] Figure 5 This is a schematic diagram of the structure of an adjustable steel pipe for a temporary support used in bridge construction.

[0025] The structure includes: 1. Temporary support main body; 1.1 Temporary support; 1.11 First column steel pipe; 1.12 Second column steel pipe; 1.13 Horizontal beam; 1.14 Column bottom sealing plate; 1.15 Column top sealing plate; 1.2 Adjusting steel pipe; 1.21 Sand box; 1.22 Steel pipe fittings; 1.23 Limiting block; 1.24 Limiting groove; 1.25 Filling sand; 1.26 Bolt sealing; 1.3 Connecting beam; 1.4 First support truss; 1.5 Second support truss; 2. Box girder; 2.1 Connecting parts; 3. Traveling bridge section; 4. Column bottom distribution beam; 5. Sand and gravel layer. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] like Figures 1 to 5 As shown, a temporary support 1.1 for bridge construction includes a temporary support body 1, a box girder 2, and a vehicular bridge section 3. The temporary support body 1 is installed on the vehicular bridge section 3. The temporary support body 1 includes two parallel temporary support sections 1.1. Each temporary support 1.1 includes a first column steel pipe 1.11, a second column steel pipe 1.12, and a horizontal beam 1.13. The first column steel pipe 1.11 and the second column steel pipe 1.12 are fixed to the lower end of the horizontal beam 1.13 by welding. A plurality of adjusting steel pipes 1.2 are provided on the upper surface of the horizontal beam 1.13. The lower end of the box girder 2 abuts against the upper surface of the adjusting steel pipes 1.2.

[0029] The adjusting steel pipe 1.2 includes a steel pipe fitting 1.22 and a sand box 1.21. The steel pipe fitting 1.22 can slide up and down within the sand box 1.21, thereby changing the overall height of the adjusting steel pipe 1.2. A limiting groove 1.24 is provided on one side of the sand box 1.21, and a limiting block 1.23 is provided on one side of the steel pipe fitting 1.22. The limiting block 1.23 is inserted and fitted into the limiting groove 1.24, ensuring that the steel pipe fitting 1.22 remains vertical when moving up and down within the sand box 1.21. The sand box 1.21 is filled with sand 1.25, and a bolt seal 1.26 is provided on the side of the sand box 1.21 away from the limiting groove 1.24, to facilitate the removal of the filling sand 1.25 when the steel pipe fitting 1.22 moves within the sand box 1.21.

[0030] The height of the adjustable steel pipe 1.2 gradually increases from both sides to the middle, which can better support the box girder 2 during installation and make the temporary support 1.1 uniformly stressed.

[0031] Connectors 2.1 are welded between the upper ends of box girders 2 to ensure stability between box girders 2 and prevent shaking during installation.

[0032] The lower ends of the first column steel pipe 1.11 and the second column steel pipe 1.12 are provided with column bottom distribution beams 4. The column bottom distribution beams 4 are installed on the upper surface of the bridge section 3. The column bottom distribution beams 4 at the lower ends of the first column steel pipe 1.11 and the second column steel pipe 1.12 can increase the bearing area of ​​the temporary support 1.1, make the overall stress of the temporary support 1.1 uniform, and enhance the overall stability of the temporary support 1.1.

[0033] A layer of sand and gravel 5 is laid between the bridge section 3 and the column base distribution beam 4, so that the lower end of the column base distribution beam 4 remains horizontal during installation, and the box girder 2 remains horizontal during installation.

[0034] A column bottom sealing plate 1.14 is provided between the first column steel pipe 1.11 and the second column steel pipe 1.12 and the column bottom distribution beam 4. A column top sealing plate 1.15 is provided between the first column steel pipe 1.11 and the second column steel pipe 1.12 and the horizontal beam 1.13. The column bottom sealing plate 1.14 and the column top sealing plate 1.15 increase the contact area between the first column steel pipe 1.11 and the second column steel pipe 1.12 and the distribution beam, effectively dispersing the load pressure, avoiding local stress concentration, improving the overall stability of the structure, and preventing the first column steel pipe 1.11 and the second column steel pipe 1.12 from directly contacting the distribution beam and causing wear.

[0035] The temporary support body 1 includes a connecting beam 1.3, which is arranged between horizontal beams 1.13. Both ends of the connecting beam 1.3 are welded and fixed to the horizontal beams 1.13. A first support truss 1.4 is fixedly arranged between the parallel temporary supports 1.1. The connection beam 1.3 is welded between the horizontal beams 1.13 and the first support truss 1.4 is arranged between the temporary supports 1.1, which can better fix the parallel temporary supports 1.1 and improve the stability of the overall installation.

[0036] A second supporting truss 1.5 is provided between the first column steel pipe 1.11 and the second column steel pipe 1.12, which can greatly improve the supporting effect of the first column steel pipe 1.11 and the second column steel pipe 1.12.

[0037] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A temporary support for bridge construction, characterized by: The system includes a temporary support body (1), a box girder (2), and a vehicular bridge section (3). The temporary support body (1) is installed on the vehicular bridge section (3). The temporary support body (1) includes two parallel temporary support sections (1.1). The temporary support (1.1) includes a first column steel pipe (1.11), a second column steel pipe (1.12), and a horizontal beam (1.13). The first column steel pipe (1.11) and the second column steel pipe (1.12) are fixed to the lower end of the horizontal beam (1.13) by welding. Several adjusting steel pipes (1.2) are provided on the upper surface of the horizontal beam (1.13). The lower end of the box girder (2) abuts against the upper surface of the adjusting steel pipes (1.2).

2. The temporary support for bridge construction of claim 1, wherein: The regulating steel pipe (1.2) includes a sand box (1.21) and a steel pipe fitting (1.22). The steel pipe fitting (1.22) is inserted into the sand box (1.21). A limiting block (1.23) is provided on one side of the steel pipe fitting (1.22). A limiting groove (1.24) is provided on one side of the sand box (1.21). The limiting block (1.23) is inserted into the limiting groove (1.24). The sand box (1.21) is filled with sand (1.25). A bolt seal (1.26) is provided on the side of the sand box (1.21) away from the limiting groove (1.24).

3. The temporary support for bridge construction of claim 1, wherein: The height of the extending adjusting steel pipe (1.2) gradually increases from both sides to the center.

4. The temporary support for bridge construction of claim 1, wherein: The lower ends of the first column steel pipe (1.11) and the second column steel pipe (1.12) are provided with column bottom distribution beams (4). The column bottom distribution beams (4) are installed on the upper surface of the bridge section (3), and a layer of sand and gravel (5) is laid between the bridge section (3) and the column bottom distribution beams (4).

5. The temporary support for bridge construction of claim 4, wherein: A column bottom sealing plate (1.14) is provided between the first column steel pipe (1.11) and the second column steel pipe (1.12) and the column bottom distribution beam (4), and a column top sealing plate (1.15) is provided between the first column steel pipe (1.11) and the second column steel pipe (1.12) and the horizontal beam (1.13).

6. A temporary support for bridge construction according to claim 1, characterized in that: The temporary support body (1) includes a connecting beam (1.3), which is arranged between the horizontal beams (1.13). Both ends of the connecting beam (1.3) are welded and fixed to the horizontal beams (1.13). A first support truss (1.4) is fixedly arranged between the parallel temporary supports (1.1).

7. A temporary support for bridge construction according to claim 1, characterized in that: A second support truss (1.5) is provided between the first column steel pipe (1.11) and the second column steel pipe (1.12).

8. A temporary support for bridge construction according to claim 1, characterized in that: A connector (2.1) is welded between the upper ends of the box girder (2).

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