A bridge pier buffer anti-collision device and installation method thereof

Abstract

The present invention relates to the technical field of bridge pier buffering and anti-collision, and in particular to a bridge pier buffering and anti-collision device and its installation method. The structure includes a bracket and at least two damping components, and there is a gap between the bracket and the bridge pier. One end of the damping component is connected to the bracket and the other end is connected to a protective plate. The protective plate is arranged on the outside of the bracket, and the protective plate is connected between two adjacent damping components. The use of this device can effectively prevent the impact force on the damping component from being directly transmitted to the bridge pier, realize the multi-level buffering, shock absorption and anti-collision function, significantly improve the buffering and anti-collision ability of traditional bridge pier anti-collision measures, improve the adaptability of the anti-collision device under various types of automobile impact loads, and can prevent the damping components that are not directly hit or are far from the impact site from participating in energy consumption, effectively reduce the replacement frequency of energy-consuming components, reduce the difficulty and cost of maintenance, and save maintenance costs.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge pier buffering and anti-collision, and in particular to a bridge pier buffering and anti-collision device and an installation method thereof. Background Art

[0002] With the rapid development of social economy, bridges, as transportation hubs, are facing an increasingly severe threat, namely, the impact of vehicles on bridge piers. Many collision accidents at home and abroad have shown that when encountering a collision with a large vehicle, the bridge piers designed according to the existing specifications may be broken and damaged, causing the entire bridge to collapse, thus causing more serious secondary disasters and leading to serious consequences such as the long-term closure of the entire highway. Therefore, it is of great practical significance to study the problem of vehicles hitting bridge piers.

[0003] At present, the existing technologies all use simple static design methods to carry out anti-collision design of bridge piers, and fail to consider the influence of parameters such as bridge pier stiffness and ductility on impact force, which is quite different from the actual situation. Secondly, the theoretical source of equivalent static force in the specification is very vague. my country's "General Specification for Design of Highway Bridges and Culverts" (JTG D60-2004) directly points out that its relevant provisions on vehicle impact force are obtained by referring to foreign specifications. In particular, my country's specifications currently still use a single, low, non-mandatory impact force design value, which is extremely unfavorable for the safety of my country's bridges. In addition, my country currently uses reinforced concrete anti-collision walls as the main anti-collision device in most cases. Its own stiffness is large and its buffering capacity is weak. Although it can protect the bridge piers from impact damage, the anti-impact force on the car is huge, which seriously threatens the safety of people in the car. In addition, once the reinforced concrete anti-collision measures are damaged, it is difficult to repair and the repair cost is high. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the existing static design method for bridge pier anti-collision, such as the failure to consider the stiffness, ductility and other parameters of the bridge pier, the weak buffering capacity of the anti-collision wall, the large recoil force, the serious threat to the safety of occupants in the vehicle, and the high repair cost, and to provide a bridge pier buffer anti-collision device and its installation method.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A pier buffering and anti-collision device comprises a bracket and at least two damping components, wherein a gap is provided between the bracket and the pier, one end of the damping component is connected to the bracket and the other end is connected to a protective plate, the protective plate is arranged on the outside of the bracket, and the protective plate is connected between two adjacent damping components.

[0007] A pier buffering and anti-collision device described in the present invention is adopted, the protective plate is arranged at the outermost layer to form an enclosure structure for daily protection and bearing impact, the enclosure structure includes a plurality of the protective plates, which is convenient for local replacement and reduces maintenance cost and workload, one end of the damping component is connected to the protective plate and the other end is connected to the bracket, which is convenient for connection between the protective plate and the damping component, and a plurality of damping components can be arranged along the circumference of the bracket. The number of the damping components is determined according to design requirements to avoid that the spacing is too large to effectively prevent and buffer collisions, and the arrangement height range of the damping components is determined according to design requirements to protect the corresponding direction of the pier. When the protective plate is impacted by external force, due to the cavity on the inner side of the protective plate, the protective plate can be fully concave inward to reduce the recoil force, and effectively utilize the deformation process of the protective plate to dissipate part of the impact energy. The two ends of the protective plate are respectively connected to the damping components. As the deformation increases, the damping component can be compressed to deform and dissipate the impact energy, further buffering the impacting vehicle, and the generated recoil force is small, which is beneficial to ensuring the safety of people in the vehicle. In addition, there is a gap between the bracket and the pier, that is, the bracket can cooperate to resist the impact force, effectively avoiding the impact force on the damping component from being directly transmitted to the pier, which is beneficial to protecting the pier structure, reducing the difficulty and cost of maintenance, realizing multi-level buffering, shock absorption and anti-collision functions, significantly improving the buffering and anti-collision capabilities of traditional pier anti-collision measures, and improving the adaptability of the anti-collision device under various types of automobile impact loads. In addition, due to the relative independence of each of the protective plates, when facing a collision, the damping components that are not directly impacted or are far from the impact site can be avoided from participating in energy consumption, effectively reducing the replacement frequency of energy-consuming components and saving maintenance costs.

[0008] Preferably, the damping component comprises a corrugated plate.

[0009] Further preferably, the cross section of the corrugated plate is wavy.

[0010] Further preferably, the wave shape includes a sine wave shape and a square wave shape.

[0011] By adopting the above-mentioned setting method, the impact force can be dissipated by the expansion and contraction deformation of the corrugated plate. The cross-section of the corrugated plate is wavy, that is, the wave surface of the corrugated plate is arranged horizontally, which is convenient for the arrangement and installation of the damping component, and is beneficial to increase the number of damping components, improve the anti-collision ability, and ensure the cavity inside the protective plate.

[0012] Preferably, the support comprises a double-layer steel frame, and the support is connected to the cap of the pier by shear bolts.

[0013] The double-layer steel frame may be polygonal or circular.

[0014] The above arrangement makes it easy to effectively protect the bridge piers, facilitates the spacing of the damping components, and allows a portion of the impact force to be transferred from the bracket to the ground instead of the bridge piers, further improving the buffering effect and protecting the bridge piers.

[0015] Preferably, the damping component is detachably connected to the bracket and the protective plate respectively.

[0016] Further preferably, the outer wall of the bracket is provided with a plurality of clamping plate groups, and the protective plate includes a panel and two side panels.

[0017] The clamping plate group includes two clamping plates, and the slot formed between the two clamping plates is used to connect the end of the damping component to facilitate bolt connection. The side plate is used to be bolted to the end of the damping component to facilitate installation.

[0018] Preferably, the damping components are evenly spaced and distributed along the circumference of the bracket.

[0019] Preferably, a buffer member is provided between the bracket and the pier.

[0020] For example, by filling with sand or rubber, as the impact deformation further increases, the impact effect of the bracket on the bridge pier can be cushioned, thereby protecting the bridge pier to the greatest extent.

[0021] A method for installing a pier buffer and anti-collision device comprises the following steps:

[0022] a. When constructing the cap of the pier, a bolt sleeve for connecting the bracket is embedded in a preset position. After the construction of the pier is completed, the bracket is arranged outside the pier and connected to the cap by shear bolts, with a gap between the bracket and the pier;

[0023] b. Connecting one end of the damping component to the bracket according to the design parameters;

[0024] c. Connect a protective plate between the other ends of two adjacent damping components to complete the construction of the anti-collision device.

[0025] By adopting the installation method of a pier buffering and anti-collision device described in the present invention, the bracket is arranged on the outside of the pier as needed, and a gap is reserved. Then, the damping components are installed according to design parameters such as installation height, spacing, and quantity, and then the protective plate is installed to form an enclosure structure for anti-collision. The installation is convenient and has low installation difficulty, which effectively improves the construction efficiency and effectively avoids the impact force from being directly transmitted to the pier, which is beneficial to protecting the pier structure and realizing multi-level buffering, shock absorption and anti-collision functions. The buffering and anti-collision capabilities of traditional pier anti-collision measures are significantly improved, and the adaptability of the anti-collision device under various types of automobile impact loads is improved.

[0026] Preferably, in step c, the protective plates are installed one by one in a clockwise or counterclockwise direction, and after the current protective plate is pushed flat between the corresponding two adjacent damping components, the current protective plate and the previous protective plate and the damping component between them are connected by pins.

[0027] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The pier buffering and anti-collision device described in the present invention can absorb the energy of automobile collision and play a buffering role at the same time. The generated anti-impact force is relatively small, which is beneficial to ensuring the safety of people in the car and effectively avoiding the impact force from being directly transmitted to the pier, which is beneficial to protecting the pier structure and reducing the difficulty and cost of maintenance. It can realize multi-level buffering, shock absorption and anti-collision functions, significantly improve the buffering and anti-collision capabilities of traditional pier anti-collision measures, and improve the adaptability of the anti-collision device under various automobile impact loads.

[0029] 2. The installation method of the pier buffer and anti-collision device described in the present invention is easy to install, has low installation difficulty, effectively improves construction efficiency, and is conducive to later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of a pier buffer and anti-collision device described in Example 1;

[0031] Figure 2 This is a partial exploded view of a bridge pier buffer and anti-collision device described in Example 1.

[0032] Markings in the figure: 1- bracket, 2- protective plate, 3- pier, 4- damping component, 5- splint group. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0034] Example 1

[0035] A pier buffering and anti-collision device described in the present invention comprises a bracket 1 and at least two damping components 4, wherein a gap is provided between the bracket 1 and the pier 3, wherein one end of the damping component 4 is connected to the bracket 1 and the other end is connected to a protective plate 2, wherein the protective plate 2 is arranged on the outside of the bracket 1 and is connected between two adjacent damping components 4, wherein the damping component 4 can deform axially to dissipate energy, and all the protective plates 2 are evenly distributed to avoid excessive spacing between two adjacent damping components 4, which results in failure to effectively prevent and buffer collisions.

[0036] Specifically, Figure 1-2 As shown, the support 1 includes a double-layer steel frame of a polygonal structure, which does not limit the support 1 to a closed structure surrounding the pier 3. It can also be set for a certain section of the column of the pier 3 according to actual needs, such as continuously setting only half of the column of the pier 3. The number of protective plates 2 is set according to the range of the enclosed column and the outward expansion spacing. In this embodiment, the example is a bracket 1 surrounding the entire pier 3 in the circumference. The cross-section of the two-layer steel skeleton is a regular hexagonal structure. There is a spacing between the two layers of steel skeletons, such as 5-10 cm. There are several support plates connected between the two layers of steel skeletons. The support plates are arranged at the corners of the polygon. The outer wall of the bracket 1 is provided with several clamping plate groups 5. The clamping plate groups 5 are evenly spaced along the circumference of the bracket 1. The clamping plate group 5 includes two clamping plates. The clamping plates are welded to the bracket 1. The bracket 1 adopts a polygonal structure, which is convenient for welding on a plane. The slot formed between the two clamping plates is used to connect the end of the damping component 4. The clamping plate group 5 is arranged corresponding to the support plate, which is convenient for arranging the damping component 4 at intervals to improve the force bearing performance. A seat plate is provided at the bottom of the double-layer steel skeleton. The seat plate is connected to the pedestal of the pier 3 by shear bolts. There is a gap of 2-3 cm between the bracket 1 and the pier 3. The gap is filled with buffer components such as sand and rubber to prevent the impact force from being directly transmitted to the pier 3 and improve the buffering effect.

[0037] The damping component 4 includes a corrugated plate, and the impact force is dissipated by the expansion and contraction deformation of the corrugated plate, which is low in cost. Preferably, as in the present embodiment, the cross section of the corrugated plate is in a wave shape, that is, the wave surface of the corrugated plate is arranged in a horizontal direction, which is convenient for the arrangement and installation of the damping component 4, and is conducive to increasing the number of damping components 4 and improving the anti-collision ability. The wave shape includes a sine wave shape and a square wave shape. The damping component 4 can also be a bellows, which has a narrow width and reserves a cavity inside the protective plate 2.

[0038] The protective plate 2 includes a panel and two side panels. The panel can be a flat panel or an arc panel. The two side panels of the protective plate 2 are connected to the corresponding ends of the damping component 4 through pins. The width of the protective plate 2 is designed according to needs, but it is necessary to avoid excessive width, which causes the spacing of the damping component 4 to be too large and difficult to drive the corrugated plate to deform and consume energy. At the same time, it is necessary to avoid the enclosure structure surrounded by the protective plates 2 to be too sharp. For example, when the number of the protective plates 2 is small, avoid using flat plates. The bottom surface of the corrugated plate and the bottom surface of the protective plate 2 have a gap with the ground to reduce friction when deformation occurs.

[0039] When the protective plate 2 is impacted by external force, due to the cavity inside the protective plate 2, the protective plate 2 can be fully sunken inward, effectively utilizing the deformation process of the protective plate 2 to dissipate part of the impact energy and reduce the recoil force. The two ends of the protective plate 2 are respectively connected to the corrugated plate. As the deformation increases, the corrugated plate can be compressed to deform and dissipate the impact energy, further buffering the impacting vehicle, and the generated recoil force is small, which is conducive to ensuring the safety of the people in the vehicle. The bracket 1 can cooperate to resist the impact force and effectively prevent the impact force from being directly transmitted to the pier 3. As the deformation continues to increase, when the bolts of the bracket 1 are cut off, the sand, rubber and other fillers between it and the pier 3 can further reduce the impact force, effectively protect the pier structure, reduce the difficulty and cost of maintenance, realize the multi-level buffering, shock absorption and anti-collision function, significantly improve the buffering and anti-collision ability of traditional pier anti-collision measures, and improve the adaptability of anti-collision devices under various types of automobile impact loads.

[0040] The installation method of the anti-collision device comprises the following steps:

[0041] a. When constructing the cap of the pier 3, a bolt sleeve for connecting the bracket 1 is pre-buried at a preset position. After the construction of the pier 3 is completed, the bracket 1 is arranged outside the pier 3, and the bracket 1 is connected to the cap by shear bolts, with a gap between the bracket 1 and the pier 3;

[0042] b. Connect one end of the damping component 4 to the bracket 1 according to the design parameters;

[0043] c. Connect the protection plate 2 between the other ends of two adjacent damping components 4 to complete the construction of the anti-collision device.

[0044] When constructing the foundation of the pier 3, a bolt sleeve for connecting the seat plate is embedded in a preset position. After the construction of the pier 3 is completed, the bracket 1 is installed so that there is a gap between the bracket 1 and the pier 3, and the bracket 1 is connected to the foundation by shear bolts.

[0045] Then, one end of all the corrugated plates is inserted into the slot formed by the clamping plate group 5, and pins are installed to connect the corrugated plates to the bracket 1. All the corrugated plates can be installed in sequence in a clockwise direction or a counterclockwise direction.

[0046] After all the corrugated plates are installed, the protective plates 2 are installed one by one in a clockwise or counterclockwise direction. First, the first protective plate 2 is installed, and the side plate away from the next protective plate 2 to be installed is connected to the corresponding corrugated plate through pins. The pins do not need to be tightened. Then the second protective plate 2 is installed, and then the current protective plate 2 is connected to the first protective plate 2 and the corrugated plate between them through pins. And so on, when installing the last protective plate 2, it is connected to the first protective plate 2 and the corrugated plate between them through pins, so that all the protective plates 2 form a continuous enclosure structure, and the contour positions of the panels of all the protective plates 2 are adapted.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bridge pier buffer and anti-collision device, characterized in that: The invention comprises a bracket (1) and at least two damping components (4), wherein a gap is provided between the bracket (1) and the pier (3), wherein one end of the damping component (4) is connected to the bracket (1) and the other end is connected to a protective plate (2), wherein the protective plate (2) is arranged on the outside of the bracket (1), and the protective plate (2) is connected between two adjacent damping components (4), wherein the bracket (1) is connected to the pedestal of the pier (3) by means of shear bolts, wherein the damping component (4) comprises a corrugated plate, wherein the damping component (4) is detachably connected to the bracket (1) and the protective plate (2), wherein the damping components (4) are distributed at intervals along the circumference of the bracket (1), wherein the protective plates (2) are installed one by one in a clockwise direction or a counterclockwise direction, and wherein the current protective plate (2) is connected to the previous protective plate (2) and the damping component (4) therebetween by means of pins.

2. The device according to claim 1, characterized in that The cross section of the corrugated plate is in a wave shape.

3. The device according to claim 1, characterized in that The support (1) comprises a double-layer steel frame.

4. The device according to claim 1, characterized in that The outer wall of the bracket (1) is provided with a plurality of clamping plate groups (5), and the clamping plate groups (5) are used to connect the damping component (4). The protective plate (2) comprises a panel and two side panels.

5. The device according to any one of claims 1 to 4, characterized in that: The damping components (4) are evenly spaced and distributed along the circumference of the bracket (1).

6. The device according to any one of claims 1 to 4, characterized in that: A buffer component is provided between the support (1) and the pier (3).

7. A method for installing a pier buffer and anti-collision device, characterized in that: A pier buffer and anti-collision device as claimed in any one of claims 1 to 6 comprises the following steps: a. When constructing the cap of the pier (3), a bolt sleeve for connecting the bracket (1) is pre-buried at a preset position. After the construction of the pier (3) is completed, the bracket (1) is arranged outside the pier (3), and the bracket (1) is connected to the cap by shear bolts, with a gap between the bracket (1) and the pier (3); b. Connecting one end of the damping component (4) to the bracket (1) according to the design parameters; c. Connect a protective plate (2) between the other ends of two adjacent damping components (4) to complete the construction of the anti-collision device.

8. The method according to claim 7, characterized in that In step c, the protective plates (2) are installed one by one in a clockwise or counterclockwise direction, and after the current protective plate (2) is pushed flat between the corresponding two adjacent damping components (4), the current protective plate (2) and the previous protective plate (2) and the damping component (4) between them are connected by pins.

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