Temporary cross brace device of self-adaptive cable-stayed bridge tower

Abstract

The utility model provides a self-adaptive temporary cross supporting device for bridge towers of a cable-stayed bridge, a main body of the cross supporting device is a cross supporting beam, the bridge towers on the two sides are provided with brackets, and the two ends of the cross supporting beam are placed on the brackets; an oil jack is arranged at the end of the transverse supporting beam, a cushion plate is arranged on the side face of the oil jack, and padstone is arranged below the oil jack. The temporary cross brace has the advantages that the hydraulic device is arranged at the end of the temporary cross brace, pushing internal force of the hydraulic device and the temporary cross brace can be adjusted in real time, and internal stress of the temporary cross brace can be adjusted along with engineering progress.

Description

Technical Field

[0001] The utility model relates to the technical field of temporary cross bracing of bridge towers, in particular to a temporary cross bracing device for a bridge tower of an adaptive cable-stayed bridge. Background Art

[0002] With the rapid development of my country's economy, a large amount of infrastructure needs to be built. Cable-stayed bridges, as a type of bridge with a large spanning capacity, are widely used. For arched bridge towers, as the construction height of the tower column increases, the tensile stress at the tower root gradually increases. Therefore, in order to ensure that the line shape and stress of the bridge tower meet the requirements of the design and specifications, it is usually necessary to set multiple temporary cross braces in the middle of the bridge tower.

[0003] The temporary cross brace in the existing related technology includes a cross brace and embedded parts fixed to the bridge towers on both sides. In actual production, the temporary cross brace is hoisted at the appropriate position inside the two towers by using a tower crane, one end of the temporary cross brace is welded to the temporary embedded part, and a jack is installed at the other end. According to the requirements of the design or monitoring unit, the jack is pushed horizontally to the designed tonnage; a cushion steel plate is placed in the gap between the temporary cross brace and the embedded parts of the cable tower; then the temporary cross brace, the cushion steel plate and the embedded parts are welded together, and then the jack is unloaded to complete the installation of the temporary cross brace. When the temporary cross brace is removed, it is necessary to recalculate the internal force of the temporary cross brace according to the formation of the bridge tower, use the jack to push to the designed internal force, cut off the cushion steel plate, and remove the temporary cross brace after the jack returns to oil.

[0004] However, the above method has the following shortcomings:

[0005] (1) After the temporary cross brace is completed, as the construction of the bridge tower progresses, its cross brace internal force is difficult to adjust. The bridge monitoring unit will observe the line shape and internal force of the bridge tower according to the progress of the bridge tower construction, and adjust the temporary cross brace internal force according to the monitoring results. However, the temporary cross brace, pad steel plate and embedded parts are all welded together. To adjust the internal force of the temporary cross brace, they need to be cut off and wait until the top thrust reaches the specified internal force. The above work is cumbersome and high-altitude work, which involves great risks.

[0006] (2) When removing the temporary cross brace, the temporary cross brace, bottom steel plate and embedded parts have been welded together, and the internal force of the temporary cross brace has changed significantly compared with the internal force during the initial installation. Affected by various factors, the internal force of the temporary cross brace is difficult to calculate. Therefore, jacks are often used to unload the temporary cross brace before removal, which increases the difficulty of removal and increases the construction risk.

[0007] (3) The installation period of temporary cross braces is long, which occupies the tower crane and delays the construction of bridge towers. The installation of temporary cross braces requires connecting the temporary cross braces, bottom steel plates and embedded parts, which poses a risk of high-altitude operations. Utility Model Content

[0008] In view of the shortcomings of the existing technology, the problem that the temporary cross brace cannot adjust the internal stress as the project progresses is solved.

[0009] The utility model provides a temporary cross bracing device for a bridge tower of an adaptive cable-stayed bridge. The main body of the cross bracing device is a cross bracing beam. The bridge towers on both sides are provided with brackets, and the two ends of the cross bracing beam are placed on the brackets.

[0010] A hydraulic jack is arranged at the end of the cross bracing beam, a pad is arranged on the side of the hydraulic jack, and a pad stone is arranged under the hydraulic jack.

[0011] As a preferred solution, the hydraulic rod of the hydraulic jack is configured to be in a retractable stepped shape.

[0012] As a preferred solution, the hydraulic jack is electrically connected to a control center, and the control center controls the extension length of the hydraulic jack in real time.

[0013] As a preferred solution, the pad is an embedded part fixedly arranged on the bridge tower.

[0014] As a preferred solution, the base plate is provided with anchor bolts or is fixedly connected to the bridge tower by welding.

[0015] As a preferred solution, the cross bracing beam is a spatial lattice structure formed by welding steel pipes or I-beams.

[0016] As a preferred solution, the cushion stone is fixedly connected to the corbel, and a hydraulic rod of a hydraulic jack is placed on the upper end.

[0017] The beneficial effects of the utility model are:

[0018] (1) According to the progress of the bridge tower construction and the instructions of the monitoring unit, the hydraulic device at the end of the temporary cross brace can be used to adjust the hydraulic device and the internal force of the temporary cross brace in real time, so that the internal stress of the temporary cross brace can be adjusted as the project progresses.

[0019] (2) The installation of bottom-picking steel plates is eliminated, which avoids the welding of temporary cross braces, bottom-picking steel plates and embedded parts. This not only avoids the risk of high-altitude operations during installation, but also reduces the tedious work during dismantling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure 2 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0023] The reference numerals in the accompanying drawings are:

[0024] 1-cross bracing beam; 2-bridge tower; 3-hydraulic jack; 4-pad stone; 5-pad; 6-corbel; 7-anchor bolt. DETAILED DESCRIPTION

[0025] To illustrate the features of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0026] Example:

[0027] See also Figure 1 to Figure 2 This embodiment provides a temporary cross bracing device for a bridge tower of an adaptive cable-stayed bridge. The main body of the cross bracing device is a cross bracing beam 1, which is a spatial lattice structure formed by welding I-beams; the bridge towers 2 on both sides are provided with brackets 6, and the two ends of the cross bracing beam 1 are placed on the brackets 6;

[0028] A hydraulic jack 3 is provided at the end of the cross bracing beam 1 so that the end of the cross bracing beam 1 can be extended and retracted to change its length, thereby affecting the internal stress of the cross bracing beam 1. In this embodiment, the hydraulic rod of the hydraulic jack 3 is also provided in a retractable stepped shape so that the adjustable length range of the hydraulic jack 3 is further increased to adapt to different usage scenarios.

[0029] In order to make the end bearing performance of the hydraulic jack 3 meet the requirements of various application scenarios, the present embodiment provides a pad 5 on the side and a pad stone 4 under the hydraulic jack 3. The pad stone 4 is fixedly connected to the bracket 6, and the hydraulic rod of the hydraulic jack 3 is placed on the upper end; the pad 5 is an embedded part fixedly arranged on the bridge tower 2, and in the present embodiment, anchor bolts 7 are provided on the pad 5 to be fixedly connected to the bridge tower 2.

[0030] In addition, in order to ensure the root stress and the linear shape of the bridge tower 2, real-time adjustments are made according to the instructions of the monitoring unit. In this embodiment, the hydraulic jack 3 is electrically connected to the control center, and the control center controls the extension length of the hydraulic jack 3 in real time and makes real-time adjustments according to the instructions of the monitoring unit.

[0031] The above embodiments and drawings are only used to illustrate the technical solution of the utility model, and are not intended to limit the utility model. The utility model is described in detail with reference to the preferred embodiments. It should be understood by ordinary technicians in this field that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the utility model do not deviate from the purpose of the utility model and should also fall within the scope of protection of the claims of the utility model. Other related technical structures not fully disclosed in the utility model are prior art in the field.

Claims

1. A temporary cross bracing device for a self-adaptive cable-stayed bridge tower, the main body of the cross bracing device being a cross bracing beam (1), the towers (2) on both sides being provided with brackets (6), and both ends of the cross bracing beam (1) being placed on the brackets (6); Features: A hydraulic jack (3) is arranged at the end of the cross bracing beam (1), a pad (5) is arranged on the side of the hydraulic jack (3), and a pad stone (4) is arranged below the hydraulic jack (3).

2. The temporary cross bracing device for the bridge tower of an adaptive cable-stayed bridge according to claim 1 is characterized in that: The hydraulic rod of the hydraulic jack (3) is arranged in a retractable stepped shape.

3. The temporary cross bracing device for the bridge tower of an adaptive cable-stayed bridge according to claim 1 or 2, characterized in that: The hydraulic jack (3) is electrically connected to a control center, and the control center controls the extension length of the hydraulic jack (3) in real time.

4. The temporary cross bracing device for the bridge tower of an adaptive cable-stayed bridge according to claim 1 is characterized in that: The pad (5) is an embedded part fixedly arranged on the bridge tower (2).

5. The temporary cross bracing device for the bridge tower of an adaptive cable-stayed bridge according to claim 4 is characterized in that: The base plate (5) is provided with anchor bolts (7) or is fixedly connected to the bridge tower (2) by welding.

6. The temporary cross bracing device for the bridge tower of an adaptive cable-stayed bridge according to claim 1 is characterized in that: The cross bracing beam (1) is a spatial lattice structure formed by welding steel pipes or I-beams.

7. The temporary cross bracing device for the bridge tower of an adaptive cable-stayed bridge according to claim 1 is characterized in that: The cushion stone (4) is fixedly connected to the corbel (6), and a hydraulic rod of a hydraulic jack (3) is placed on the upper end.

Images