A transition device and bridge head transition structure for eliminating vehicle jumping at a bridge head

Abstract

The present invention relates to a transition device and a bridgehead transition structure for eliminating vehicle jumping at a bridgehead. The transition device comprises a transition support plate arranged at the left end adjacent to the bridge direction, a first support is arranged at the lower side of the left end of the transition support plate, a second support is arranged at the lower side of the transition support plate on the right side of the first support, and the transition support plate is composed of a first support plate section located on the left and a second support plate section located on the right side of the first support plate section. The stiffness of the second support plate section gradually decreases from left to right, and the stiffness of the first support plate section is not less than that of the second support plate section. The present invention solves the technical problem in the prior art that when a vehicle passes through a bridge deck or a road surface, the vehicle jumping at a bridgehead is easily caused due to a sudden change in stiffness.

Description

Technical Field

[0001] The invention relates to a transition device and a bridge head transition structure for eliminating vehicle jumping at a bridge head in the technical field of bridge engineering. Background Art

[0002] The road surface has different degrees of settlement and fracture at the backfill of the abutment, causing jumping and impact when vehicles pass, thus causing additional impact loads on the bridge culvert and the road surface, making drivers and passengers feel bumpy and uncomfortable, and even causing vehicles to slow down significantly. Severe cases can lead to traffic accidents. Moreover, jumping at the bridge head will make the impact of the car on the road surface next to the bridge deck more serious, causing the height difference between the road surface and the bridge deck to become increasingly larger, which is a vicious cycle.

[0003] The main reason for the vehicle jumping at the bridge head is the difference in stiffness between the materials that make up the bridge, roadbed and road surface, which leads to the inconsistency of stiffness between the bridge deck and the adjacent road surface. This will cause 1. Uneven settlement at the connection between the flexible road and the steel core structure; 2. Sudden stiffness changes when the vehicle transitions through the bridge deck and road surface. The main solution to this problem in the prior art is to set a scaffold at the transition position between the bridge deck and road surface, which plays a transition role and avoids the vehicle jumping at the bridge head caused by the large height difference between the road surface and the bridge deck. However, this solution still cannot solve the problem of sudden stiffness changes when the vehicle transitions through the bridge deck and road surface. Summary of the invention

[0004] The purpose of the present invention is to provide a transition device for eliminating vehicle jumping at a bridge head, so as to solve the technical problem in the prior art that vehicles are easily caused to jump at a bridge head due to sudden change in stiffness when passing through a bridge deck or a road surface; the purpose of the present invention is also to provide a bridge head transition structure using the transition device.

[0005] To solve the above technical problems, the technical solutions in the present invention are as follows:

[0006] A technical solution for a transition device for eliminating vehicle jumping at a bridge head is:

[0007] A transition device for eliminating vehicle jumping at a bridge head comprises a transition support plate arranged at the left end adjacent to the direction of the bridge, a first support is arranged on the lower side of the left end of the transition support plate, a second support is arranged on the lower side of the transition support plate on the right side of the first support, the transition support plate is composed of a first support plate section located on the left and a second support plate section located on the right side of the first support plate section, the stiffness of the second support plate section gradually decreases from left to right, and the stiffness of the first support plate section is not less than the stiffness of the second support plate section.

[0008] The transition support plate between the first support and the second support constitutes the first support plate section.

[0009] The second support plate segment gradually becomes thinner from left to right so that the stiffness of the second support plate segment gradually decreases from left to right.

[0010] A technical solution for a bridgehead transition structure is:

[0011] A bridge head transition structure includes a pier, a bridge with its right end supported on the pier, and a roadbed located on the right side of the pier, and also includes a transition device, the transition device includes a transition support plate arranged at the left end adjacent to the bridge direction, the transition support plate consists of a first support plate section located on the left and a second support plate section located on the right side of the first support plate section, the stiffness of the second support plate section gradually decreases from left to right, the stiffness of the first support plate section is not less than the stiffness of the second support plate section, and the second support plate section is supported on the roadbed.

[0012] The bottom of the first support plate section is supported on the bridge pier through the first support.

[0013] A second support is arranged on the lower side of the transition support plate and on the right side of the first support, and the transition support plate between the first support and the second support constitutes the first support plate section.

[0014] The second support plate segment gradually becomes thinner from left to right so that the stiffness of the second support plate segment gradually decreases from left to right.

[0015] The stiffness of the first support plate section is consistent with the stiffness of the bridge, and the stiffness of the right end of the second support plate section is consistent with the stiffness of the roadbed.

[0016] The beneficial effects of the present invention are as follows: a transition plate is used in the present invention to achieve the transition between the bridge and the roadbed, and the transition support plate is composed of a first support plate section and a second support plate section arranged on the left and right. The first support plate section has a support stiffness that is not less than that of the second support plate section, and the stiffness of the second support plate section gradually decreases from left to right. When a vehicle travels through a bridge with greater stiffness to a roadbed with less stiffness, it first travels to the first support plate section with greater stiffness to avoid a sudden change in stiffness for the first time, and then moves to the roadbed through the second support plate section with changed stiffness to avoid a sudden change in stiffness for the second time, thereby achieving a perfect transition and avoiding the problem of vehicle jumping at the bridge head caused by a sudden change in stiffness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the bridgehead transition structure of the present invention;

[0018] Figure 2 yes Figure 1 Schematic diagram of the structure of the transition block. DETAILED DESCRIPTION

[0019] Implementation of bridgehead transition structure e.g. Figure 1~2As shown: it includes a pier 19, a bridge 18 supported on the pier at the right end, and a roadbed 13 located on the right side of the pier, and a transition device is arranged between the bridge 18 and the roadbed 13. The transition device includes a transition support plate 5 arranged at the left end adjacent to the bridge direction, a first support 3 supported on the pier 19 is arranged on the lower side of the left end of the transition support plate 5, and a second support 7 is arranged on the lower side of the transition support plate 5 on the right side of the first support 3. The roadbed 13 includes a concrete beam 10 supporting the second support 7. In the present invention, the first support 3 is an articulated support, which includes an upper support 1 fixedly connected to the transition support plate 5 and a lower support 4 fixedly connected to the pier 19. The upper support 1 and the lower support 4 are connected by a first articulated shaft 2 extending along the front-rear direction through the articulated axis. The second support 7 is also an articulated support, which includes a lifting device in the middle. In this embodiment, the lifting device is a threaded lifting device, which includes a nut 8 and a screw rod 12 matched with the nut. The lifting and lowering of the screw rod can be adjusted by rotating the nut. The upper end of the lifting device is connected to the transition support plate 5 through the first hinge structure 6, and the lower end of the lifting device is connected to the concrete beam 10 through the second hinge structure 9. Both the first hinge structure and the second hinge structure have a second hinge shaft 11 whose hinge axis extends in the front-to-back direction.

[0020] The transition support plate is composed of a first support plate section 16 located between the first support 3 and the second support 7 and a second support plate section 15 located on the right side of the first support plate section 16. The second support plate section 15 forms a cantilever structure compared to the first support plate section. The rigidity of the second support plate section 15 gradually decreases from left to right. The rigidity of the first support plate section 16 is consistent with the rigidity of the left end of the second support plate section 15. In this embodiment, the entire transition support plate 5 is integrally formed of the same material. The second support plate section 15 gradually becomes thinner from left to right to achieve a gradual decrease in the rigidity of the second support plate section 15 from left to right. The rigidity of the first support plate section 16 is consistent with the rigidity of the bridge 18, and the rigidity of the right end of the second support plate section 15 is consistent with the rigidity of the roadbed 13.

[0021] The roadbed 13 and the upper side of the transition support plate 5 are paved with a road surface 15. In this embodiment, a buffer block 17 is detachably connected to the upper side of the left end of the transition support plate by bolts, and the buffer block 17 includes a buffer block bottom plate 21 and a rubber block 20 vulcanized and fixed to the upper side of the buffer block bottom plate. The bottom of the buffer block bottom plate 21 has an arc-shaped concave structure 23, and the upper end of the transition support plate 5 has an arc-shaped protrusion adapted to the concave structure. Bolt holes 22 are arranged on the left and right sides of the concave structure 23 on the buffer block bottom plate 21, and threaded holes corresponding to the positions of the bolt holes are opened on the transition support plate 5, and the bolts are installed in the bolt holes and the threaded holes. Through the cooperation of the concave structure and the arc-shaped protrusion, on the one hand, the position positioning of the buffer block during installation can be achieved, and on the other hand, the connection force between the buffer block and the transition support plate in the left and right directions can be increased to avoid the bolts being damaged by a large impact force when impacted by a vehicle; of course, the setting of the arc-shaped concave structure can also increase the connection area between the rubber block and the buffer block bottom plate, thereby increasing the connection strength between the two.

[0022] The bridge head transition structure in the present invention is explained by taking the vehicle traveling from left to right as an example. After passing the bridge 18, the vehicle first rolls over the transition block 17. The rubber block 20 of the transition block cushions the vehicle to reduce the impact force of the vehicle on the road surface and the transition support plate. The buffer block is the first force-bearing component and is therefore more easily damaged. When damaged, the bolts can be removed for convenient replacement. Because of the effects of the first support and the second support, the rigidity of the first support plate section 5 is kept consistent with the rigidity of the bridge 18, so that the sudden change of rigidity of the vehicle from the bridge to the transition support plate can be avoided. The first support and the second support are both hinged supports. The hinged support makes the transition support plate have a certain degree of mobility when impacted by the vehicle, so that the impact force can be released to a certain extent, avoiding the stress concentration problem caused by the complete rigid support, and effectively increasing the service life of the first support and the second support; when the vehicle drives onto the second support plate section, since the thickness of the second support plate section gradually becomes thinner from left to right, the rigidity of the second support plate section gradually decreases from left to right, and finally the rigidity of the right end of the second support plate section is consistent with the rigidity of the roadbed, thereby avoiding the sudden change of rigidity between the wheel from the second support plate section to the roadbed, and perfectly solving the problem of jumping at the bridge head caused by the sudden change of rigidity. If there is a height difference caused by the settlement of the roadbed and the two sides of the bridge, the transition support plate can be adjusted by the lifting device to adapt to the height difference, and the gap between the transition support plate and the roadbed is filled with sand and gravel. In other embodiments of the present invention: the first support and the second support may also be rigid supports, for example, the transition support plate is directly fixed to the bridge pier through the first support; the transition block may also be omitted; the first support plate segment and the second support plate segment may also be welded together; the change in stiffness of the second support plate segment from left to right may also not be achieved by changing the thickness, for example, the second support plate segment is made of several materials with different stiffnesses from left to right; the first support may also be a support surface structure or a support block structure; the second support may also be omitted, in which case the right end of the second support plate segment is only supported on the roadbed.

[0023] An implementation example of a transition device for eliminating bridge head jumping Figure 1~2 As shown: the specific structure of the transition device is the same as the transition device described in the above-mentioned bridge head transition structure embodiments, and will not be described in detail here.

Claims

1. A transition device for eliminating vehicle jumping at a bridge head, comprising a transition support plate arranged at the left end adjacent to the bridge direction, characterized in that: A first support is arranged on the lower side of the left end of the transition support plate, and the transition support plate is composed of a first support plate section located on the left and a second support plate section located on the right side of the first support plate section. The stiffness of the second support plate section gradually decreases from left to right, and the stiffness of the first support plate section is not less than the stiffness of the second support plate section. A second support is arranged on the lower side of the transition support plate on the right side of the first support. The transition support plate between the first support and the second support constitutes the first support plate section. The first support is an articulated support, which includes an upper support member fixedly connected to the transition support plate and a lower support member fixedly connected to the pier. The upper support member and the lower support member are connected to a first articulated shaft extending along a front-to-rear direction via an articulated axis. The second support is an articulated support, which includes a lifting device in the middle. The lifting device is a threaded lifting device, which includes a nut and a screw rod matched with the nut. The upper end of the lifting device is connected to the transition support plate via a first articulated structure, and the lower end of the lifting device is connected to the concrete beam via a second articulated structure. Both the first articulated structure and the second articulated structure have a second articulated shaft extending along a front-to-rear direction via an articulated axis.

2. The transition device according to claim 1, characterized in that: The second support plate segment gradually becomes thinner from left to right so that the stiffness of the second support plate segment gradually decreases from left to right.

3. A bridgehead transition structure, comprising a bridge pier, a bridge with its right end supported on the bridge pier, and a roadbed located on the right side of the bridge pier, and also comprising a transition device, wherein the transition device comprises a transition support plate disposed at its left end adjacent to the bridge direction, characterized in that: The transition support plate is composed of a first support plate section located on the left and a second support plate section located on the right side of the first support plate section. The stiffness of the second support plate section gradually decreases from left to right. The stiffness of the first support plate section is not less than that of the second support plate section. The second support plate section is supported on the roadbed. The bottom of the first support plate section is supported on the bridge pier through the first support. A second support is arranged on the lower side of the transition support plate on the right side of the first support. The transition support plate between the first support and the second support constitutes the first support plate section. The first support is a hinged support, which includes a An upper support member fixedly connected to the support plate and a lower support member fixedly connected to the pier, the upper support member and the lower support member are connected by a first hinge shaft extending along the front-to-back direction via a hinge axis, the second support is a hinged support, which includes a middle lifting device, the lifting device is a threaded lifting device, which includes a nut and a screw rod matched with the nut, the upper end of the lifting device is connected to the transition support plate via a first hinge structure, the lower end of the lifting device is connected to the concrete beam via a second hinge structure, and the first hinge structure and the second hinge structure both have a second hinge shaft extending along the front-to-back direction via a hinge axis.

4. The bridgehead transition structure according to claim 3 is characterized in that: The second support plate segment gradually becomes thinner from left to right so that the stiffness of the second support plate segment gradually decreases from left to right.

5. The bridgehead transition structure according to claim 3, characterized in that: The stiffness of the first support plate section is consistent with the stiffness of the bridge, and the stiffness of the right end of the second support plate section is consistent with the stiffness of the roadbed.

Images