Connecting device of assembled steel bridge string structure mechanism

Abstract

The utility model relates to the technical field of highway bridges and culverts, in particular to a connecting device of an assembly type steel bridge string mechanism. The connection problem of the assembled highway steel bridge and the string pull rod is solved. The structure adopted by the utility model comprises a plurality of groups of channel steel arranged back to back, the upper and lower groups of channel steel are connected into a whole through long bolts, double channel steel arranged back to back is arranged in the middle of the upper and lower groups of channel steel in a penetrating manner, and a T-shaped connecting piece is arranged in the center of the channel steel at the bottom; a reinforcing plate is arranged at the corresponding position in a groove of each steel channel, a long bolt penetrates through the reinforcing plates to connect the upper steel channel and the lower steel channel into a whole, the T-shaped connecting piece is formed by welding an upper connecting plate and a lower lug plate which are welded, the upper connecting plate is arranged in the steel channel at the bottom, and a threaded hole is formed in the lower lug plate.

Description

Technical Field

[0001] The utility model relates to the technical field of highway bridges and culverts, and relates to a connecting device for a prestressed steel bridge stringing mechanism. Background Art

[0002] The assembled steel bridge is one of the most commonly used emergency repair steel temporary bridges, and is often used for the army to quickly cross the bridge. In the subsequent development process, it is used as a temporary construction temporary bridge by the civil engineering industry. The commonly used truss sheets in the existing assembled steel bridge series are the "321" and 200 types, and the "321" truss sheet is mainly used for the construction temporary bridge. The "321" assembled highway steel temporary bridge has always been of the upper bearing type during the bridge construction process, with a common span of 15 meters. When crossing rivers, lakes and seas, the span is too short, resulting in the need to increase the intermediate piers. However, it is inconvenient to construct the piers in the on-site environment. Therefore, new technologies are needed to improve the spanning ability and bearing capacity of the current assembled highway steel bridge.

[0003] Therefore, the prestressed design concept is introduced into the design of the commonly used assembled highway steel bridge. However, first of all, the connection problem between the prestressed tie rod and the assembled highway steel bridge needs to be solved. Content of the Utility Model

[0004] In view of this, in order to solve the connection problem of the prestressed tie rod of the assembled highway steel bridge, the utility model provides a connecting device for a prestressed steel bridge stringing mechanism.

[0005] In order to overcome the problems existing in the prior art, the technical solution adopted by the utility model is as follows: a connecting device for a prestressed steel bridge stringing mechanism, characterized in that it includes several groups of back-to-back arranged channel steels, and each upper and lower group of channel steels is connected into one body by long bolts, and the upper and lower groups of channel steels clamp the truss chord, and a T-shaped connecting piece is arranged at the center position of the bottom channel steel.

[0006] Further, reinforcing plates are arranged at corresponding positions in the grooves of each channel steel, and the long bolts pass through the reinforcing plates to connect the upper and lower channel steels into one body.

[0007] Further, the T-shaped connecting piece is welded by an upper connecting plate and a lower ear plate welded together. The upper connecting plate is arranged in the bottom channel steel, and threaded holes are arranged on the lower ear plate.

[0008] Further, the thickness of the reinforcing plate is the same as the depth of the channel steel groove.

[0009] Further, the reinforcing plate is welded to the channel steel.

[0010] Further, bolt holes are arranged on the reinforcing plate.

[0011] Further, the channel steel can be freely adjusted according to the truss spacing and truss sheet model.

[0012] Compared with the prior art, the advantages of the utility model are as follows:

[0013] 1) The utility model is of a self-anchoring design, and the connection points can be freely set on any truss piece as required.

[0014] 2) The utility model can be quickly disassembled and assembled. All components are bolt-connected and can be disassembled and assembled synchronously with the prefabricated highway steel bridge.

[0015] 3) The utility model has a simple structural design, can be reused, and has good economic performance. Description of the Drawings

[0016] Figure 1 is a structural schematic diagram of the utility model;

[0017] Figure 2 is a connection schematic diagram of the channel steel and the reinforcing plate of the utility model;

[0018] Figure 3 is a structural diagram of the T-shaped connector of the utility model;

[0019] Figure 4 is Figure 1 elevation view;

[0020] Figure 5 is Figure 4 sectional view at A-A in ;

[0021] Marking description: 1. Channel steel, 2. T-shaped connector, 3. Reinforcing plate, 4. Full-length high-strength bolt, 5. Pin shaft, 6. Double channel steel;

[0022] 2-1. Upper connecting plate, 2-2. Lower ear plate. Detailed Implementation Modes

[0023] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts shall fall within the protection scope of the utility model.

[0024] A connecting device for a cable-stayed mechanism of a prefabricated steel bridge in this embodiment, as Figure 1 shown, includes several groups of channel steels 1 arranged back to back. Each upper and lower group of channel steels is connected into one body by full-length high-strength bolts 4. The upper and lower groups of channel steels clamp the truss chord, and a T-shaped connector 2 is arranged at the center position of the bottom channel steel 1.

[0025] As an implementation method in this embodiment, a reinforcing plate 3 is welded at corresponding positions in the groove of each channel steel 1. Bolt holes are provided on the reinforcing plate 3, and the thickness of the reinforcing plate 3 is the same as the groove depth of the channel steel 1. As Figure 2 shown, the full-length high-strength bolts 4 pass through the reinforcing plate 3 to connect the upper and lower channel steels into one body, and the full-length high-strength bolts 4 are extended versions of high-strength bolts.

[0026] As an implementation method in this embodiment, the T-shaped connector 2 is welded by an upper connecting plate 2-1 and a lower ear plate 2-2 which are welded to each other. The upper connecting plate 2-1 is arranged in the bottom channel steel 1, and threaded holes are provided on the lower ear plate 2-2. As Figure 3 shown, there are two types of lower ear plates 2-2, one for the beam end and the other for connecting the middle chord tension rod.

[0027] As an implementation method in this embodiment, the channel steel 1 is freely adjusted according to the truss spacing and the truss sheet model.

[0028] The full-length high-strength bolts used in the present utility model refer to general long high-strength bolts.

[0029] During the use of the present utility model, the upper connecting plate 2-1 of the T-shaped connector 2 is connected to the truss sheet and the channel steel 1 through the full-length high-strength bolts 4, and the U-shaped connecting end of the chord tension rod is fixed to the lower ear plate 2-2 of the T-shaped connector 2 through the pin shaft 5, so as to connect the chord tension rod to the assembled highway steel bridge truss sheet.

[0030] The splicing method of the present utility model, as Figure 4 and Figure 5 shown, taking the "321" assembled highway steel bridge as an example, the upper structure of the bridge consists of 6 rows of trusses. 2 rows of trusses are taken as a group, and 1 chord tension rod is arranged in the middle. 4 sets of chord tension rod connectors are required. There are 3 chord tension rods arranged in total for the 3 groups of trusses of the whole bridge, and 12 sets of chord tension rod connectors are required.

[0031] 1. Fabricate the channel steel 1 connector according to the design requirements. After the thick reinforcing plate 3 in the channel steel is provided with bolt holes, it is welded inside the channel steel, as Figure 2 shown.

[0032] 2. Fabricate the T-shaped connector 2 according to the design requirements. The upper connecting plate 2-1 and the lower ear plate 2-2 are welded into a whole, as Figure 3 shown. The lower ear plate 2-2 at the middle of the bridge span is slightly different from that at both ends. The difference is that the lower ear plate 2-2 at the middle has 2 bolt holes.

[0033] 3. Assemble the commonly used truss sheets into an assembled truss according to the design requirements and complete the erection.

[0034] 4. Select the connection position of the first truss section. Place 2 channel steel 1 connectors at the top of the upper strengthening chord rod, and arrange 2 channel steel 1 connectors at the corresponding positions of the chord rod of the truss panel. Connect and fix the channel steel 1 connectors and the truss panel with ordinary high-strength bolts 4.

[0035] 5. Align the upper connecting plate 2-1 of the T-shaped connector 2 with the channel steel 1 connector according to the bolt hole positions, and then use high-strength bolts 4 to connect the channel steel 1 connector, the truss panel and the upper connecting plate 2-1 from top to bottom in sequence to complete the fixation of the cable-strut connector. Then fix the cable-strut with the lower ear plate 2-2 through a pin shaft 5. As Figure 4 and Figure 5 shown.

[0036] 6. Complete the fixation and installation of the remaining cable-strut connectors according to steps 4 and 5 to complete all connection work.

[0037] The embodiment introduces the specific application of the cable-strut connector in the prefabricated highway steel bridge, but is not limited to the "321" truss panel, and is also applicable to the connection of cable-struts of different types of prefabricated highway steel bridges.

[0038] In the above description, many specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited by the specific embodiments disclosed above.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A connection device for a prefabricated steel bridge tensioning mechanism, characterized in that , comprising a plurality of groups of channel steels (1) arranged back to back, wherein each group of upper and lower channel steels are connected into one piece by means of full-length high-strength bolts (4), the upper and lower groups of channel steels clamp the truss chords, and a T-shaped connector (2) is arranged at the center of the bottom channel steel (1).

2. The connection device of the assembled steel bridge string tensioning mechanism according to claim 1, characterized in that: A reinforcement plate (3) is provided at a corresponding position in the groove of each channel steel (1), and a full-length high-strength bolt (4) passes through the reinforcement plate (3) to connect the upper and lower channel steels together.

3. A connection device for a prefabricated steel bridge tensioning mechanism according to claim 1 or 2, characterized in that: The T-shaped connecting piece (2) is formed by welding an upper connecting plate (2-1) and a lower ear plate (2-2) which are welded together. The upper connecting plate (2-1) is arranged in the bottom channel steel (1), and the lower ear plate (2-2) is provided with a threaded hole.

4. The connection device of the assembled steel bridge string tensioning mechanism according to claim 2, characterized in that: The thickness of the reinforcing plate (3) is the same as the depth of the channel steel (1).

5. The connection device of the assembled steel bridge string tensioning mechanism according to claim 4, characterized in that: The reinforcing plate (3) is welded to the channel steel (1).

6. The connection device of the assembled steel bridge string tensioning mechanism according to claim 5, characterized in that: The reinforcing plate (3) is provided with bolt holes.

7. The connection device of the assembled steel bridge string tensioning mechanism according to claim 6, characterized in that: The channel steel (1) can be freely adjusted according to the truss spacing and truss piece model.

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