A bridge shock-absorbing expansion joint with corrugated plates

Abstract

The present invention relates to the technical field of bridges, and in particular to a bridge shock-absorbing expansion joint with a corrugated plate, comprising an asphalt concrete pavement layer, a concrete pavement layer, a steel mesh, a threaded steel pipe, an anchor bolt, and a T-shaped steel plate arranged on the bridge deck, wherein the threaded steel pipe is arranged on the concrete pavement layer along the vertical direction, and the threaded steel pipe is arranged between the mesh holes of the steel mesh, presenting a hollow cylindrical structure with an open top, and passing through the outer end of the transverse plate of the T-shaped steel plate, and the opening is filled with a wooden plug; the inner end bottom of the transverse plate of the T-shaped steel plate is fixedly connected to a vertically arranged front plate through a second anchor bolt, a corrugated steel plate and soft steel are arranged between the front plate on one side and the longitudinal plate of the T-shaped steel plate, and a rubber water stop is arranged between the upper inner walls of the two front plates. The present invention realizes the rapid replacement of the expansion joint of the bridge after the earthquake through the anchor bolts, and effectively reduces the impact of the expansion joint damage on the post-earthquake rescue.

Description

Technical Field

[0001] The invention relates to the technical field of bridges, and in particular to a bridge shock-absorbing expansion joint with a corrugated plate. Background Art

[0002] Bridge expansion joints refer to expansion joints that are usually set between the two beam ends, between the beam ends and the abutments, or at the hinged position of the bridge to meet the requirements of bridge deck deformation. The expansion joints are required to be able to freely expand and contract in both directions parallel and perpendicular to the bridge axis, be firm and reliable, and be smooth without sudden jumps and noise when vehicles pass through; they must be able to prevent rainwater and garbage and soil from infiltrating and blocking; and they must be easy and convenient to install, inspect, maintain, and remove dirt. At the expansion joints, the railings and the bridge deck pavement must be disconnected.

[0003] Under the action of earthquakes, the expansion joints of bridges are easily damaged, and often accompanied by damage to the bridge beams. This will not only cause economic losses, but also affect the role of bridges as transportation hubs in earthquake shelters and post-earthquake rescue, consume precious post-earthquake rescue time, and affect important events such as rescuing the wounded and post-disaster reconstruction.

[0004] After searching, it was found that most of the expansion joints of bridges with earthquake-resistant functions are based on comb-tooth expansion joints. Although the expansion joints can be replaced after an earthquake, their bolts often pass through complex internal structures, which makes it inconvenient to quickly replace the whole thing and cannot save precious rescue time after an earthquake. Although they use cavities or polytetrafluoroethylene to expand the range of displacement during an earthquake, there is no energy-absorbing and shock-absorbing device inside, and the earthquake-resistant effect is not ideal, and there is still damage to bridges and abutments. In addition, they cannot directly replace rubber waterstops, which will limit the life of the expansion joints and affect the durability of the bridges. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a bridge shock-absorbing expansion joint with a corrugated plate. Through the action between the T-shaped steel plates and the mobility of the rotating shaft, the corrugated plate and the mild steel of the bridge are deformed during an earthquake, which plays a role in energy dissipation and shock reduction, thereby reducing the damage to the bridge beam caused by the earthquake. The present invention also extends the life of the expansion joint by setting anchor bolts and replacing waterstops, thereby increasing its durability to a certain extent; through the setting of anchor bolts and threaded steel pipes, the purpose of quickly replacing the overall expansion joint after an earthquake and restoring traffic can be achieved, which has a positive effect on taking refuge during an earthquake and post-earthquake rescue.

[0006] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is:

[0007] The present invention discloses a bridge shock-absorbing expansion joint with a corrugated plate, comprising an asphalt concrete pavement layer arranged on a bridge deck, a concrete pavement layer, a steel mesh arranged in the concrete pavement layer, a threaded steel pipe and anchor bolts, and a T-shaped steel plate arranged on the concrete pavement layer. The threaded steel pipe is arranged on the concrete pavement layer along a vertical direction, and is arranged between the mesh holes of the steel mesh, presenting a hollow cylindrical structure with an open top. The inner wall of the threaded steel pipe is provided with an internal thread matching the external thread on the anchor thread, and passes through the outer end of the transverse plate of the T-shaped steel plate, and the opening is filled with a wooden plug; the inner end bottom of the transverse plate of the T-shaped steel plate is fixedly connected to a vertically arranged front plate by a second anchor bolt, a corrugated steel plate and soft steel are arranged between the front plate on one side and the longitudinal plate of the T-shaped steel plate, and a rubber water stop is arranged between the upper parts of the inner walls of the two front plates.

[0008] Angle steel for support is provided at the connection between the transverse plate and the longitudinal plate of the T-shaped steel plate.

[0009] A rotating shaft for hinged connection between the front end and the rear end of the T-shaped steel plate is arranged on the transverse plate of the T-shaped steel plate.

[0010] The two ends of the rubber water stop are fixedly connected by second anchor bolts on the front plate.

[0011] The top of the front plate is provided with a threaded hole which is threadably engaged with the second anchor bolt.

[0012] The second anchor bolt is connected to the threaded hole at the top of the front plate through a countersunk through hole arranged at the front end of the T-shaped steel plate, and a second wooden plug is arranged at the top opening of the countersunk through hole.

[0013] The length of the rubber water stop is greater than the width of the expansion joint between the two front plates.

[0014] The beneficial effects of the present invention are:

[0015] 1. The present invention provides a T-shaped steel plate so that the anchor bolts and the front plate are stable under normal use; however, under the action of an earthquake, due to the action between the T-shaped steel plates, the bolts are broken, and the corrugated plate and the soft steel are deformed, thereby achieving the effect of energy dissipation and shock reduction.

[0016] 2. The present invention establishes a buffer between the bridge and the abutment by uniformly arranging the corrugated steel web and the soft steel, which can absorb the energy brought by the earthquake, thereby effectively avoiding the damage of the bridge and the abutment, and ensuring the normal use of the bridge for evacuation during earthquakes and post-earthquake rescue.

[0017] 3. The present invention realizes that only the waterstop strip needs to be replaced under normal use through the provision of anchor bolts, which effectively prolongs the service life of the expansion joint, thereby extending the durability of the bridge, improving the convenience of replacement and work efficiency, and can effectively reduce the losses caused by replacing the expansion joint.

[0018] 4. The present invention realizes the replacement of the entire expansion joint after an earthquake by setting anchor bolts and threaded steel pipes, which can effectively improve the recovery efficiency of bridge traffic after an earthquake, thereby improving the efficiency of evacuation during an earthquake and rescue after an earthquake.

[0019] 5. The present invention has good applicability to bridges of different bridge types and seismic fortification levels, and can meet the seismic design requirements of different projects by adjusting the shape and size of the T-shaped steel plate, the number and density of the corrugated steel web and soft steel, and the corresponding bolts and other parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a longitudinal cross-sectional view of the present invention;

[0021] Figure 2 is a transverse cross-sectional view of the present invention;

[0022] Figure 3 is a plan view of the present invention;

[0023] Figure 4 It is the construction drawing of the threaded steel pipe of the present invention.

[0024] In the figure: asphalt concrete pavement layer 1, concrete pavement layer 2, steel mesh 3, threaded steel pipe 4, anchor bolt 5, second anchor bolt 51, T-shaped steel plate 6, front plate 7, angle steel 8, rotating shaft 9, corrugated steel plate 10, mild steel 11, rubber waterstop 12, wooden plug 13, second wooden plug 131. DETAILED DESCRIPTION

[0025] The present invention is further described below:

[0026] See also Figure 1-4 ,

[0027] The present invention discloses a bridge shock-absorbing expansion joint with a corrugated plate, comprising an asphalt concrete pavement layer 1 arranged on the bridge deck, a concrete pavement layer 2, a steel mesh 3 arranged in the concrete pavement layer 2, a threaded steel pipe 4 and an anchor bolt 5, and a T-shaped steel plate 6 arranged on the concrete pavement layer 2, wherein the threaded steel pipe 4 is arranged on the concrete pavement layer 2 along a vertical direction, the threaded steel pipe 4 is arranged between the mesh holes of the steel mesh 3, and is in a hollow cylindrical structure with an opening at the top, and the inner wall of the threaded steel pipe 4 is provided with a threaded steel pipe 4 that is connected to the outer thread of the anchor thread. The inner thread matches the groove and passes through the outer end of the transverse plate of the T-shaped steel plate 6, and the opening is filled with a wooden plug 13; the bottom of the inner end of the transverse plate of the T-shaped steel plate 6 is fixedly connected to the vertically arranged front plate 7 by a second anchor bolt 51, and a corrugated steel plate 10 and a soft steel 11 are provided between the front plate 7 and the longitudinal plate of the T-shaped steel plate 6 on one side, and a rubber waterstop 12 is provided between the upper inner walls of the two front plates 7, and preferably, a T-shaped steel plate 61 is provided at the front end of the connection between the T-shaped steel plate 6 and the front plate 7 on the other side to increase its connection strength.

[0028] An angle steel 8 for support is provided at the connection between the transverse plate and the longitudinal plate of the T-shaped steel plate 6, which plays a role in supporting and strengthening the strength of the T-shaped steel plate.

[0029] The transverse plate of the T-shaped steel plate 6 is provided with a rotating shaft 9 for hinged connection between its front end and rear end. When the two parts of the bridge body collide due to an earthquake, the second anchor bolt 51 on the left is damaged by the sharp section on the right, and the rotating shaft 9 drives the T-shaped steel plate 6 to rotate, so that the corrugated steel plate 10 and the soft steel 11 can deform and dissipate energy, play a shock-absorbing role, protect the beam body, and facilitate the subsequent recovery of the traffic system.

[0030] The two ends of the rubber waterstop 12 are fixedly connected by the second anchor bolts 51 on the front plate 7. The rubber waterstop 12 can be replaced simply by removing the second anchor bolts 51, thereby extending the life of the bridge.

[0031] A threaded hole is provided on the top of the front plate 7 and is threadedly engaged with the second anchor bolt 51 , so as to facilitate rapid replacement of the rubber water stop 12 .

[0032] The second anchor bolt 51 is connected to the threaded hole at the top of the front plate 7 through a countersunk through hole provided at the front end of the T-shaped steel plate 6 , and a second wooden plug 131 is provided at the top opening of the countersunk through hole.

[0033] The length of the rubber water stop strip 12 is greater than the width of the expansion joint between the two front plates 7 .

[0034] Installation process: first, position and place the threaded steel pipe 4 in the mesh of the steel mesh 3. To prevent the threaded steel pipe 4 from being blocked when pouring concrete, the threaded steel pipe 4 should be filled with foam materials in advance before the concrete pavement layer 2 is constructed; after the concrete pouring reaches a certain strength, a layer of geotextile is laid in the expansion joint groove of the bridge and then the asphalt concrete pavement layer 1 of the entire bridge is laid; after the asphalt concrete pavement layer 1 is formed and reaches strength, the asphalt concrete of the expansion joint groove is cut off according to the reserved size, the geotextile is removed, and the foam in the threaded steel pipe 4 is cleaned before entering the laying stage; the welded front plate 7, T-shaped steel plate 6, corrugated steel plate 10, and mild steel 11 are installed as a whole, and the angle steel 8, rubber water stop 12, the second anchor bolt 51 on the rubber water stop 12, the threaded steel pipe 4, and the anchor bolt 5 are installed in sequence on the upper part of the concrete pavement layer 2 to achieve fixation, and the wooden plug 13 on the upper part of the anchor bolt 5 and the second wooden plug 131 on the upper part of the second anchor bolt 51 are installed to achieve dust prevention, and the installation is completed. In summary, the first installation process is simple to operate, clear in concept, and easy to implement. When it is necessary to disassemble and replace the rubber waterstop 12, just remove the bolts and then replace the rubber waterstop 12. After the replacement is completed, tighten the bolts again to replace the rubber waterstop 12. It is convenient and simple, reduces the loss caused by maintenance, and improves the replacement efficiency. During an earthquake, when a collision occurs between the beam and the abutment, the impact of the sharp end on the second anchor bolt 51 is used to transform the expansion joint into a compressible state. The deformation of the corrugated steel plate 10 and the soft steel 11 is used to dissipate energy and reduce shock, avoiding damage to the bridge and the abutment. This is of decisive significance to whether the bridge can play a role in evacuation during an earthquake and post-earthquake rescue. After an earthquake, by disassembling the threaded steel pipe 4 and the anchor bolt 5, the expansion joint as a whole can be quickly replaced, playing an important role in evacuation during an earthquake and post-earthquake rescue.

[0035] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings or directly or indirectly applied in related technical fields are also included in the patent protection scope of the present invention.

Claims

1. A bridge shock-absorbing expansion joint with a corrugated plate, characterized in that: The invention comprises an asphalt concrete pavement layer (1) arranged on a bridge deck, a concrete pavement layer (2), a steel mesh (3) arranged in the concrete pavement layer (2), a threaded steel pipe (4) and an anchor bolt (5), and a T-shaped steel plate (6) arranged on the concrete pavement layer (2), wherein the threaded steel pipe (4) is arranged on the concrete pavement layer (2) along a vertical direction, and the threaded steel pipe (4) is arranged between mesh holes of the steel mesh (3) and presents a hollow cylindrical structure with an open top, and the inner wall of the structure is provided with a thread matching the external thread on the anchor bolt (5). The inner thread is formed on the outer end of the transverse plate of the T-shaped steel plate (6), and the opening is filled with a wooden plug (13); the inner bottom of the transverse plate of the T-shaped steel plate (6) is fixedly connected to the vertically arranged front plate (7) by a second anchor bolt (51); a corrugated steel plate (10) and a soft steel (11) are provided between the front plate (7) and the longitudinal plate of the T-shaped steel plate (6) on one side, and a rubber water stop strip (12) is provided between the upper inner walls of the two front plates (7); a rotating shaft (9) for hinged connection between the front and rear ends of the T-shaped steel plate (6) is provided on the transverse plate of the T-shaped steel plate (6).

2. The bridge shock-absorbing expansion joint with corrugated plate according to claim 1 is characterized in that: The two ends of the rubber water stop strip (12) are fixedly connected via second anchor bolts (51) on the front plate (7).

3. The bridge shock-absorbing expansion joint with corrugated plate according to claim 2 is characterized in that: A threaded hole is provided on the top of the front plate (7) and is threadably engaged with the second anchor bolt (51).

4. The bridge shock-absorbing expansion joint with corrugated plate according to claim 3 is characterized in that: The second anchor bolt (51) is connected to the threaded hole at the top of the front plate (7) via a countersunk through hole provided at the front end of the T-shaped steel plate (6), and a second wooden plug (131) is provided at the top opening of the countersunk through hole.

5. The bridge shock-absorbing expansion joint with corrugated plate according to claim 4 is characterized in that: The length of the rubber water stop strip (12) is greater than the width of the expansion joint between the two front plates (7).

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