Falling stone impact prevention damping device for cylindrical bridge pier

Abstract

A falling stone impact prevention damping device for a cylindrical pier relates to the technical field of bridge safety and comprises a plurality of anti-collision units arranged on the pier at intervals in the vertical direction of the pier, every two adjacent anti-collision units are connected through a plurality of dampers, and the anti-collision units are detachably connected to the pier in a hoop mode. The inner portions of the anti-collision units are filled with and fixedly provided with buffering and damping structures, the side circumferential faces of the buffering and damping structures are used for receiving external impact so as to conduct buffering and energy dissipation, and when any anti-collision unit vertically shakes due to impact, the damper can vertically dissipate energy and transmit impact energy to the adjacent anti-collision unit. The construction and maintenance processes are simplified, the cost is reduced, the shock resistance of the pier is remarkably improved, the service life of the pier is remarkably prolonged, and the safety and stability of a bridge structure in the face of natural disasters are enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of bridge safety, and in particular to a rockfall prevention and shock absorbing device for cylindrical bridge piers. Background Art

[0002] With the acceleration of urbanization and the continuous advancement of infrastructure construction, bridges, as important structures connecting traffic, play a vital role in the modern transportation network. The stability and safety of bridges are directly related to the safety of people's lives and property. In mountainous areas where natural disasters are frequent, bridge piers are often faced with the impact of natural disasters such as mudslides, rockfalls, and debris flows, which may cause damage to bridge piers and even cause serious consequences such as bridge collapse.

[0003] In the prior art, in order to protect bridge piers from impacts such as mudslides, reinforced concrete reinforcement, setting up crash walls or using crash pads are usually used. Although these methods can improve the impact resistance of bridge piers to a certain extent, there are still some shortcomings: Traditional reinforcement methods often need to be constructed together with the bridge piers, which not only increases the construction cost, but also prolongs the construction period. For bridges that have already been built, reinforcement and reconstruction are more difficult. Moreover, once the bridge pier reinforcement structure is fixed, it is difficult to adjust or replace it according to the actual situation, which limits its adaptability to different impact conditions. The internal structure of the traditional anti-collision structure may be damaged after being impacted, but replacing or repairing these structures often requires a lot of manpower and material resources, which increases maintenance costs. In addition, the existing anti-collision structure can only provide limited energy dissipation when impacted, and cannot effectively reduce the damage to the bridge piers caused by the impact. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art and provide an anti-rockfall impact shock absorbing device for cylindrical bridge piers, which can provide a more effective effect of dispersing impact force and dissipating energy while avoiding complex construction and reducing maintenance difficulty and cost.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a rockfall prevention and impact shock absorption device for cylindrical piers, comprising a plurality of anti-collision units arranged at intervals on the pier along the vertical direction of the pier, two adjacent anti-collision units are connected by a plurality of dampers, the anti-collision units are detachably connected to the pier in the form of clamps, the interior of the anti-collision units is filled and fixed with a buffering and shock absorbing structure, the side circumference of the buffering and shock absorbing structure is used to receive external impacts for buffering and energy consumption, when any anti-collision unit shakes vertically due to impact, it can vertically consume energy through the dampers and transfer the impact energy to adjacent anti-collision units.

[0006] Preferably, the anti-collision unit includes two symmetrically arranged semi-annular clamps, and the opposite mounting ends of the two semi-annular clamps are provided with connecting plates. The outer edges of the upper and lower ends of the semi-annular clamps are provided with protective plates. The connecting plates, protective plates and side walls of the semi-annular clamps form a semi-annular cavity for filling the buffer and shock-absorbing structure.

[0007] More preferably, the buffer and shock-absorbing structure in the semi-annular cavity includes a plurality of buffer bags and a semi-annular buffer plate, the buffer bag is fastened to the protective plate, and the semi-annular buffer plate is connected to the side wall surfaces of all buffer bags in the semi-annular clamp.

[0008] More preferably, the buffer pack is an arc-shaped block structure, the number of the buffer packs in the semi-annular clamp is 3, and the 3 buffer packs are spliced ​​in sequence to fill the semi-annular cavity.

[0009] More preferably, the buffer bag is filled with a high-elastic buffer material.

[0010] More preferably, the outer wall surface of the semi-annular buffer plate is provided with conical thorns.

[0011] More preferably, the inner wall surface of the semi-annular clamp is also provided with an elastic buffer pad for abutting against the bridge pier.

[0012] More preferably, the damper is hinged to the protective plates of two adjacent anti-collision units.

[0013] In addition, the present invention also provides a method for preventing rockfall impact and shock absorption for cylindrical bridge piers, which adopts the above-mentioned rockfall impact and shock absorption device for cylindrical bridge piers, and comprises the following steps: a. Install an anti-collision unit at the bottom of the pier; b. A plurality of anti-collision units are vertically stacked above the anti-collision unit, and two adjacent anti-collision units are connected via a plurality of dampers.

[0014] Preferably, the anti-collision unit and the damper are both modularly designed to facilitate installation and replacement.

[0015] Compared with the prior art, the present invention has the following beneficial effects: Simplified construction process: Since the anti-collision unit is detachably connected to the bridge pier in the form of a hoop, the present invention avoids the complexity of constructing together with the bridge pier in the traditional reinforcement method, so that the device can be quickly installed on the built cylindrical bridge pier, greatly reducing the construction difficulty, time and cost.

[0016] Reduce maintenance costs: The anti-collision unit can be designed in a modular manner, which is convenient for adjustment or replacement according to actual needs, and the buffer shock-absorbing structure is filled and fixed inside. This design not only improves the flexibility of the device, but also allows for quick and separate replacement when the anti-collision unit or damper is worn out, reducing maintenance difficulty and cost.

[0017] Improve impact resistance: Two adjacent anti-collision units are connected by multiple dampers, so that when any anti-collision unit shakes vertically due to impact, the damper can realize vertical energy dissipation and transfer the energy to the adjacent anti-collision unit. This design not only improves the impact resistance of the entire device and enhances the stability of the bridge pier in the face of natural disasters, but also reduces the load borne by a single anti-collision unit when it is impacted, thereby increasing the service life of the anti-collision unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure in the embodiment; Figure 2 It is a schematic cross-sectional structure diagram in the embodiment; Figure 3 It is a schematic diagram of the disassembled structure of the semi-annular clamp, the buffer bag and the semi-annular buffer plate in the embodiment.

[0019] In the figure: 1——bridge pier 2——anti-collision unit 3——damper 4——semi-annular clamp 5——connecting plate 6——protective plate 7——buffer bag 8——semi-annular buffer plate 9——elastic buffer pad. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0021] It should be noted in advance that, in the present invention, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact through another feature between them.

[0022] like Figure 1As shown, the rockfall prevention and impact shock absorbing device for cylindrical piers includes a plurality of anti-collision units 2 arranged at intervals on the pier 1 along the vertical direction of the pier 1, and two adjacent anti-collision units 2 are connected by a plurality of dampers 3. The anti-collision unit 2 is detachably connected to the pier 1 in the form of a clamp, and the interior of the anti-collision unit 2 is filled and fixed with a buffering and shock absorbing structure. The side surface of the buffering and shock absorbing structure is used to receive external impacts for buffering and energy consumption. When any anti-collision unit 2 shakes vertically due to impact, it can vertically consume energy through the damper 3 and transfer the impact energy to the adjacent anti-collision unit 2.

[0023] In the above structure, the anti-collision unit 2 includes two symmetrically arranged semi-annular clamps 4, and the two semi-annular clamps 4 are provided with connecting plates 5 at the opposite mounting ends. When the two semi-annular clamps 4 embrace the cylindrical bridge pier 1, the connecting plates 5 of the two semi-annular clamps 4 are respectively pressed against each other, and then the two connecting plates 5 are fastened and connected by bolts (such as Figure 2 As shown), those skilled in the art should know that by being connected to the bridge pier 1 in the form of a clamp, the locking degree of the clamp and the friction resistance between the clamp and the bridge pier 1 can stabilize it at a certain height of the bridge pier 1 without worrying about automatically sliding down. Therefore, the damper 3 provided will not be excessively worn out due to long-term stress in daily life, but only play a key role when the anti-collision unit 2 is subjected to a large vertical load and vertical shaking occurs.

[0024] In this embodiment, Figure 3 As shown, the outer edges of the upper and lower ends of the semi-annular clamp 4 are fixedly connected to the protective plates 6 by welding, and the connecting plate 5, the protective plate 6, and the side wall of the semi-annular clamp 4 form a semi-annular cavity for filling the buffering and shock-absorbing structure. The damper 3 is connected to the protective plates 6 of the two adjacent anti-collision units, specifically by hingedly connecting the upper and lower ends of the damper 3 to the two adjacent protective plates 6. In addition, the inner wall surface of the semi-annular clamp 4 is also provided with an elastic buffer pad 9 for abutting against the pier 1. The elastic buffer pad 9 can be connected to the semi-annular clamp 4 by bonding. Since the elastic buffer pad 9 has a certain elastic deformation ability, when the semi-annular clamp 4 is installed on the cylindrical pier 1, it can better fit the outer wall surface of the pier 1.

[0025] The symmetrical design ensures that the anti-collision unit 2 is evenly distributed and stably fixed on the cylindrical bridge pier 1, thereby improving the symmetry and balance of the overall structure. The presence of the protective plate 6 not only protects the internal buffering and shock-absorbing structure, but also provides additional protection when impacted, thereby reducing direct damage to the semi-annular clamp 4.

[0026] Furthermore, the buffering and shock-absorbing structure in the semi-annular cavity includes a plurality of buffer bags 7 and a semi-annular buffer plate 8. The buffer bag 7 is fastened to the protective plate 6, and the semi-annular buffer plate 8 is connected to the side wall surfaces of all buffer bags 7 in the semi-annular clamp 4. The combination of the buffer bag 7 and the semi-annular buffer plate 8 provides a continuous buffer system that can provide effective energy absorption and dissipation when impacted. The buffer bag 7 is filled with a highly elastic buffer material (such as a highly elastic rubber, sponge, etc.). The use of the highly elastic buffer material improves the buffering capacity of the buffer bag 7, so that the anti-collision unit 2 can better absorb and disperse energy when impacted.

[0027] The buffer bag 7 is an arc-shaped block structure. The number of buffer bags 7 in the semi-annular clamp 4 is three. The three buffer bags 7 are spliced ​​in sequence to fill the semi-annular cavity. The arc angle of each buffer bag 7 is 60 degrees. Three buffer bags 7 can fill a semi-annular cavity. Of course, this is only a preferred method in this embodiment. Those skilled in the art can also set the number of buffer bags 7 to more. When specifically connected, the inner wall and the outer wall of the buffer bag 7 can be respectively provided with a front steel plate and a rear steel plate. The front steel plate is fastened to the inner wall of the semi-annular clamp 4 by bolts, and the rear steel plate is fastened to the semi-annular buffer plate 8 by bolts.

[0028] In addition, the outer wall of the semi-annular buffer plate 8 is provided with conical spikes to break up the large rocks that hit it, reduce the volume and mass of the impact object, thereby reducing the impact on the anti-collision unit 2 and improving the anti-impact ability of the anti-collision unit.

[0029] When the rockfall impact damping device for cylindrical bridge piers provided in the above-mentioned embodiment encounters a mudslide, rockfall or debris flow impacting the anti-collision unit 2, the protective plate 6 and the semi-annular buffer plate 8 are impacted first, and the conical spikes arranged on the outer wall of the semi-annular buffer plate 8 break the impact object during the impact, reducing the volume and mass of the impact object, thereby reducing the impact force on the anti-collision unit 2.

[0030] The impact energy is mainly divided into two forms: vertical and horizontal. The horizontal impact energy is transmitted to the internal buffer bag 7, and the high-elastic buffer material filled in the buffer bag 7 begins to work, absorbing and dispersing the impact force. This material can effectively reduce the direct damage to the bridge pier 1 caused by the impact. The vertical impact energy causes the anti-collision unit 2 to shake vertically, thereby causing the damper 3 to start working, dissipating energy through its internal damping mechanism, reducing the vertical shaking amplitude of the anti-collision unit 2, and achieving the effect of vertical energy dissipation. In this process, the damper 3 not only absorbs the impact energy, but also transfers part of the energy to the adjacent anti-collision unit 2. Through the synergistic effect between multiple anti-collision units 2, the energy is dispersed and the impact force borne by a single anti-collision unit 2 is reduced. In addition, since the anti-collision unit 2 and the damper 3 are both modularly designed, even if an anti-collision unit 2 or damper 3 is damaged in extreme cases, it can be quickly replaced without affecting the protection function of the entire device.

[0031] After the impact, the device can maintain long-term stability and protective performance due to its design advantages, ensuring that the bridge pier 1 can still be effectively protected in subsequent possible impacts. Therefore, the device can effectively protect the cylindrical bridge pier when impacted by mud-rock flow, rockfall or debris flow, reduce the damage to the bridge structure caused by natural disasters, and improve the safety and service life of the bridge.

[0032] The rockfall impact damping device of the present invention achieves effective energy absorption and dispersion when dealing with mudslides, rockfall impacts or debris flows by installing multiple modular anti-collision units 2 on cylindrical bridge piers, using a buffering and damping structure composed of a semi-annular clamp 4, a buffer bag 7 and a semi-annular buffer plate 8, and a damper 3 connecting adjacent anti-collision units 2. In addition, the working principle of the device also includes preliminary impact absorption, multiple buffering and damping, energy dissipation and transmission, and rapid maintenance and replacement of modular structures. This design not only simplifies the construction and maintenance process and reduces costs, but also significantly improves the impact resistance and service life of the bridge piers, and enhances the safety and stability of the bridge structure when facing natural disasters.

[0033] In order to make it easier for ordinary technicians in the field to understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and the above-mentioned embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A rockfall-proof shock-absorbing device for cylindrical bridge piers, characterized in that: The invention comprises a plurality of anti-collision units (2) arranged at intervals on the pier (1) in the vertical direction of the pier (1), two adjacent anti-collision units (2) being connected via a plurality of dampers (3), the anti-collision units (2) being detachably connected to the pier (1) in the form of a hoop, the interior of the anti-collision unit (2) being filled with and fixed with a buffering and shock absorbing structure, the side surface of the buffering and shock absorbing structure being used to receive external impacts to buffer and dissipate energy, and when any anti-collision unit (2) is vertically shaken due to an impact, the damper (3) can dissipate energy vertically and transmit the impact energy to the adjacent anti-collision unit (2).

2. The rockfall prevention and shock absorbing device for cylindrical bridge piers according to claim 1 is characterized in that: The anti-collision unit (2) comprises two symmetrically arranged semi-annular clamps (4), the two semi-annular clamps (4) having opposite mounting ends each provided with a connecting plate (5), the outer edges of the upper and lower ends of the semi-annular clamps (4) each provided with a protective plate (6), the connecting plate (5), the protective plate (6) and the side wall surface of the semi-annular clamps (4) forming a semi-annular cavity for filling a buffering and shock absorbing structure.

3. The rockfall prevention and shock absorbing device for cylindrical bridge piers according to claim 2 is characterized in that: The buffer and shock-absorbing structure in the semi-annular cavity comprises a plurality of buffer bags (7) and a semi-annular buffer plate (8), wherein the buffer bag (7) is tightly connected to the protective plate (6), and the semi-annular buffer plate (8) is connected to the side wall surfaces of all the buffer bags (7) in the semi-annular clamp (4).

4. The rockfall prevention and shock absorbing device for cylindrical bridge piers according to claim 3 is characterized in that: The buffer bag (7) is an arc-shaped block structure, the number of the buffer bags (7) in the semi-annular clamp (4) is three, and the three buffer bags (7) are spliced ​​in sequence to fill the semi-annular cavity.

5. The rockfall prevention and shock absorbing device for cylindrical bridge piers according to claim 3 is characterized in that: The buffer bag (7) is filled with a high-elasticity buffer material.

6. The rockfall prevention and shock absorbing device for cylindrical bridge piers according to claim 3 is characterized in that: The outer wall surface of the semi-annular buffer plate (8) is provided with conical thorns.

7. The rockfall prevention and shock absorbing device for cylindrical bridge piers according to claim 2 is characterized in that: The inner wall surface of the semi-annular clamp (4) is also provided with an elastic buffer pad (9) for abutting against the bridge pier (1).

8. The rockfall prevention and shock absorbing device for cylindrical bridge piers according to claim 2 is characterized in that: The damper (3) is hinged to the protective plates (6) of two adjacent anti-collision units.

9. A method for preventing rockfall impact and shock absorption of cylindrical bridge piers, characterized in that: The rockfall prevention and shock absorbing device for cylindrical bridge piers according to any one of claims 1 to 8 comprises the following steps: a. Arranging an anti-collision unit (2) at the bottom of the bridge pier (1); b. A plurality of anti-collision units (2) are vertically stacked above the anti-collision unit (2), and two adjacent anti-collision units (2) are connected via a plurality of dampers (3).

10. The rockfall impact and shock absorption method for cylindrical bridge piers according to claim 9, characterized in that: The anti-collision unit (2) and the damper (3) are both modularly designed to facilitate installation and replacement.

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