Connecting support for side-span piers of deep river-crossing bridge

Abstract

The utility model provides a deep river crossing bridge side-span pier connecting support and bridge construction, and solves the problems that when a box girder of a bridge is in butt joint with a side-span pier, the box girder deforms and shakes due to thermal expansion and cold contraction of the box girder, so that the box girder and the side-span pier are accumulated to generate position deviation, and the bridge is damaged. The construction needs to be adjusted to adapt to deviation, and the construction period is affected. A box girder is arranged on one side of a pier, a side-span pier is arranged at the far position of one side of the pier, a connecting steel frame is arranged at one end of the box girder, a pressing plate is connected to the upper portion of one end of the connecting steel frame, an opposite-pull rod is arranged in the middle of the pressing plate, abutting supports are arranged on the two sides of one end of the connecting steel frame, and rolling shafts are connected to the upper side and the lower side of one end of the connecting steel frame. By means of the connecting steel frame arranged in the device, when the box girder is connected with the side-span pier, the situation that later adaptive adjustment is needed due to errors is avoided, and meanwhile construction of butt-joint box girders on the side-span pier is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, and particularly relates to a connecting bracket for side-span piers of a bridge across a deep river. Background Technique

[0002] During the construction of a bridge, when the mid-span is being constructed, it will be extended by gradually building box girders, directly building them close to the side-span piers, and then docking with the side-span piers to complete the construction on both sides of the bridge.

[0003] However, when the existing box girder is docked with the side-span pier, usually a box girder for docking is first built on the side-span pier, and then a box girder is built at one end of the mid-span box girder to dock with the box girder on the side-span pier. But in this way, during the construction, it is very easy for the box girder to deform and shake due to the alternation of day and night, resulting in a certain positional deviation between the two during docking, so that additional work is required to adapt to the deviation for docking construction, greatly increasing the workload and affecting the work efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a connecting bracket for side-span piers of a bridge across a deep river, which solves the problem that when the box girder of the bridge is docked and connected with the side-span pier, due to the thermal expansion and contraction of the box girder, it will deform and shake, resulting in a positional deviation from the accumulation of the side-span pier, so that construction adjustment is required to adapt to the deviation, resulting in an impact on the construction period.

[0005] The embodiments of the utility model are realized through the following technical solutions:

[0006] The utility model provides a connecting bracket for side-span piers of a bridge across a deep river, including a pier. There is a box girder on one side of the pier, and a side-span pier is arranged at a distance on one side of the pier. There is a connecting steel frame at one end of the box girder. Above one end of the connecting steel frame, there is a pressing plate. A tie rod is arranged in the middle of the pressing plate. There are abutting brackets on both sides of one end of the connecting steel frame. There are rollers connected to the upper and lower sides of one end of the connecting steel frame.

[0007] Preferably, the connecting steel frame is an I-beam connected in a triangular shape at the four corners on one side of the box girder, and the connecting steel frame extends towards the center.

[0008] Preferably, one end of the connecting steel frame is arranged in a close-fitting manner.

[0009] Preferably, the pressing plate is connected above the side-span pier through the tie rod, and the close-fitting end of the connecting steel frame extends below the pressing plate.

[0010] Preferably, the rollers are arranged in the gap between the pressing plate and the connecting steel frame, and the rollers are also arranged between the lower part of the close-fitting part of one end of the connecting steel frame and the top of the side-span pier.

[0011] Preferably, the abutting bracket is a triangular steel frame fittingly arranged on both sides of the closer end of the connecting steel frame.

[0012] Preferably, the limiting block is a convex block on the upper and lower sides of the closer end of the connecting steel frame that matches the length of the roller.

[0013] The technical solution of the embodiment of the present utility model has at least the following advantages and beneficial effects:

[0014] 1. By means of the connecting steel frame provided in the device, when connecting the box girder and the side-span pier, it will not be necessary to make subsequent adaptation adjustments due to errors, and at the same time, the construction of the box girder docking on the side-span pier is also reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the embodiment of the present utility model, the drawings required for use in the embodiment will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is of the present utility model Figure 1 is an enlarged schematic diagram of part A in the present utility model;

[0018] Figure 3 is a front view schematic diagram of the connecting steel frame of the present utility model;

[0019] Figure 4 is a top view schematic diagram of the connecting steel frame of the present utility model;

[0020] Reference numerals: pier 1, box girder 101, side-span pier 2, connecting steel frame 3, pressing plate 301, tie rod 3011, roller 302, abutting bracket 303, limiting block 304. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, if the terms "set", "installed", "connected", "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] The following will combine with Figures 1 to 4 to make a detailed description of the present utility model.

[0023] A connecting support for the side-span pier of a bridge spanning a deep river includes a pier 1. On one side of the pier 1, there is a box girder 101. At a distance on one side of the pier 1, there is a side-span pier 2. At one end of the box girder 101, there is a connecting steel frame 3. Above one end of the connecting steel frame 3, there is a pressing plate 301. In the middle of the pressing plate 301, there is an opposing pull rod 3011. On both sides of one end of the connecting steel frame 3, there are abutting supports 303. Above and below both sides of one end of the connecting steel frame 3, there are rollers 302. The connecting steel frame 3 is an I-beam connected in a triangular shape at the four corners on one side of the box girder. The connecting steel frame 3 extends towards the center and converges. One end of the connecting steel frame 3 is arranged in a close-fitting manner. The pressing plate 301 is connected above the side-span pier 2 through the opposing pull rod 3011. One end of the connecting steel frame 3 that converges and fits extends below the pressing plate 301.

[0024] First, the box girder 101 is successively erected on one side of the pier 1. When the box girder 101 is about to be erected to the side-span pier 2, by setting a connecting steel frame on one side of the box girder 101, then one end of the connecting steel frame 3 that converges and fits will be located above the top of the side-span pier 2. Then, the pressing plate 301 is connected above the connecting steel frame 3 through the opposing pull rod 3011. At the same time, rollers 302 are arranged to support between the bottom of the pressing plate 301 and the top of one end of the connecting steel frame 3 that converges and fits, and the bottom of the connecting steel frame 3 is also supported and connected to the top of the side-span pier 2 through the rollers 302. Thus, the upper and lower sides of the connecting steel frame 3 are limited by the abutment of the pressing plate 301 and the rollers 302, so that it will not shake too much up and down due to the thermal expansion and contraction of the box girder 101 day and night, resulting in its damage.

[0025] Furthermore, the rollers 302 are arranged at the gap between the pressing plate 301 and the connecting steel frame 3, and the rollers 302 are also arranged between the lower part of the converging end of the connecting steel frame 3 and the top of the side-span pier 2. The limiting blocks 304 are convex blocks on the upper and lower sides of the converging end of the connecting steel frame 3 that match the length of the rollers 302.

[0026] Finally, because the upper and lower sides of the connecting steel frame 3 are supported by rollers 302, if the box girder 101 expands and contracts due to thermal expansion and contraction and shrinks forward and backward, the friction will be reduced by the rolling of the rollers 302, so that the box girder 101 can only expand and contract forward and backward along the rollers 302, reducing the load on the pads, allowing them to withstand the changes in thermal expansion and contraction of the box girder 101 without causing extrusion damage due to blind limitation. Then, based on the connecting steel frame 3, steel bars and molds are set up on it for direct cast-in-place, which avoids the error in the connection point between the existing box girder 101 and the side span pier 2 due to thermal expansion and contraction, and the need for cast-in-place to adapt to the error, resulting in an increase in workload. At the same time, there is no need to build a docking box girder 101 on the side span pier 2, which reduces a lot of workload.

[0027] Furthermore, the abutting bracket 303 is a triangular steel frame that is fitted on both sides of one end of the connecting steel frame 3 .

[0028] At the same time, abutment brackets 303 are arranged at the bottom of the pressing plate 301 on both sides of the connecting steel frame 3 to limit the two sides of the connecting steel frame 3 so as to prevent it from shaking left and right due to thermal expansion and contraction.

[0029] The following is a specific implementation process of the present invention. First, box beam 101 is built on one side of pier 1 in sequence. When box beam 101 is about to be built to side span pier 2, a connecting steel frame is set on one side of box beam 101, and then the end of connecting steel frame 3 close to each other will be located above the top of side span pier 2. Then, pressure plate 301 is connected to the top of connecting steel frame 3 by tension rod 3011. At the same time, roller 302 is set at the bottom of pressure plate 301 and the top of the end close to each other of connecting steel frame 3 for support. And roller 302 is used to support and connect with the top of side span pier 2 at the bottom of connecting steel frame 3, so that the upper and lower sides of connecting steel frame 3 will be limited by the abutment of pressure plate 301 and roller 302, so that it will not be damaged by excessive up and down shaking due to thermal expansion and contraction of box beam 101 day and night. At the same time, abutment brackets 303 are set at the bottom of pressure plate 301 and on both sides of connecting steel frame 3. To limit the two sides of the connecting steel frame 3 so that it will not shake left and right due to thermal expansion and contraction. Finally, because the upper and lower sides of the connecting steel frame 3 are supported by rollers 302, if the box girder 101 expands and contracts and shrinks forward and backward due to thermal expansion and contraction, the friction can be reduced by rolling the rollers 302, so that the box girder 101 can only expand and contract forward and backward along the rollers 302, reducing the load on the pads, so that it can withstand the changes in thermal expansion and contraction of the box girder 101, and will not be squeezed and damaged due to blind limitation. Then, based on the connecting steel frame 3, steel bars and molds are set up on it for direct cast-in-place, which avoids the existing box girder 101 being easily connected to the side span pier 2 due to thermal expansion and contraction. The connection point between the two is prone to errors caused by thermal expansion and contraction, and cast-in-place is needed to adapt to the error, resulting in an increase in workload. At the same time, there is no need to build a docking box girder 101 on the side span pier 2, which reduces a lot of workload.

[0030] The above are only 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 be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A side span pier connection bracket for a bridge across a deep river, comprising a pier (1), a box beam (101) being arranged on one side of the pier (1), and a side span pier (2) being arranged at a distance from one side of the pier (1), characterized in that: A connecting steel frame (3) is provided at one end of the box beam (101), a pressure plate (301) is connected above one end of the connecting steel frame (3), a tension rod (3011) is provided in the middle of the pressure plate (301), abutment brackets (303) are provided on both sides of one end of the connecting steel frame (3), and rollers (302) are connected on the upper and lower sides of one end of the connecting steel frame (3).

2. A side span pier connection bracket for a bridge across a deep river according to claim 1, characterized in that: The connecting steel frame (3) is an I-beam connected in a triangular shape at four corners of one side of the box beam, and the connecting steel frame (3) extends toward the center.

3. The side span pier connection bracket for a bridge across a deep river according to claim 1, characterized in that: One end of the connecting steel frame (3) is arranged close to each other.

4. The side span pier connection bracket for a bridge across a deep river according to claim 1, characterized in that: The pressure plate (301) is connected to the top of the side span pier (2) via a tension rod (3011), and the end of the connecting steel frame (3) that is close to and fits with the pressure plate (301) extends to the bottom of the pressure plate (301).

5. The side span pier connection bracket for a bridge across a deep river according to claim 1, characterized in that: The roller (302) is arranged in the gap between the pressure plate (301) and the connecting steel frame (3), and the roller (302) is also arranged between the lower part of one end of the connecting steel frame (3) and the top of the side span pier (2).

6. The side span pier connection bracket for a bridge across a deep river according to claim 1, characterized in that: The abutting bracket (303) is a triangular steel frame that is fitted on both sides of one end of the connecting steel frame (3).

7. The side span pier connection bracket for a bridge across a deep river according to claim 1, characterized in that: The connecting steel frame (3) further comprises a limit block (304), wherein the limit block (304) is a protrusion arranged on the upper and lower sides of one end of the connecting steel frame (3) and matched with the length of the roller (302).

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