Energy dissipation device capable of resisting impact of rockfall

Abstract

The application discloses a kind of energy dissipation devices that can resist the impact of debris rockfall, and relates to the technical field of bridge pier protection.The energy dissipation device comprises an inner cylinder, an intermediate cylinder and an outer cylinder, which are sequentially sleeved outside the bridge pier column from inside to outside.The outer side of the outer cylinder is provided with a collision avoidance unit, the inner cavity of the outer cylinder is provided with a rubber air spring, the inner cavity of the intermediate cylinder is provided with a damping alloy energy dissipation structure, the inner cavity of the inner cylinder is filled with concrete, and the outer cylinder comprises a plurality of annular steel sleeves that are spliced along the height direction of the bridge pier column.The collision avoidance unit comprises a plurality of collision avoidance blocks that are uniformly distributed along the circumference of the annular steel sleeve.The energy dissipation device gradually dissipates energy through the collision avoidance unit, the rubber air spring, the damping alloy energy dissipation structure and the inner cylinder filled with concrete, maximally reduces the impact energy of rockfall, reduces the impact of debris rockfall on the bridge pier structure, and protects the bridge pier column.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pier protection, and in particular to an energy dissipation device capable of resisting impact of debris and rolling stones. BACKGROUND

[0002] The construction of traffic routes needs to pass through mountainous areas, and the construction of roads in these areas involves a large number of problems of slope excavation and support, slope dangerous rock collapse, rolling stones and the like. Especially in accident-prone areas, a large number of rolling stones and falling stones often crash the road and even injure life, that is, cause accidents and block rescue. Among them, the protection of bridge pier columns is particularly important. The bridge pier column structure, as a support system of the bridge structure, transmits the upper load to the foundation and is one of the key load-bearing components of the bridge structure. Once damaged, it will cause serious loss, and in severe cases, it may even lead to the overall collapse of the bridge.

[0003] In order to improve the safety of the bridge pier, there are currently two methods: one is to enhance the resistance of the bridge pier itself, that is, to consider increasing the resistance of the structural component from the aspects of material, structural form, size and the like; and the other is to add a protection device to the bridge pier. The existing protection device usually protects the bridge pier by combining a steel sleeve and a rubber buffer material, but the energy dissipation effect is poor and the bridge pier structure cannot be well protected. SUMMARY

[0004] The main purpose of the present application is to provide an energy dissipation device capable of resisting impact of debris and rolling stones to solve the problems in the prior art.

[0005] To solve the above technical problems, the present application adopts the following technical scheme:

[0006] An energy dissipation device capable of resisting impact of debris and rolling stones comprises an inner cylinder, an intermediate cylinder and an outer cylinder which are sequentially sleeved outside a bridge pier column from inside to outside, an anti-collision unit is arranged on the outside of the outer cylinder, a rubber air spring is arranged in the inner cavity of the outer cylinder, a damping alloy energy dissipation structure is arranged in the inner cavity of the intermediate cylinder, the inner cavity of the inner cylinder is filled with concrete, the outer cylinder comprises a plurality of annular steel sleeves which are spliced along the height direction of the bridge pier column, and the anti-collision unit comprises a plurality of anti-collision blocks which are uniformly distributed along the circumference of the annular steel sleeve.

[0007] Further, the anti-collision block comprises a horizontal connecting portion and an arc-shaped energy dissipation portion, one end of the horizontal connecting portion is fixedly connected to the outside of the annular steel sleeve, and the arc-shaped energy dissipation portion is fixedly arranged at the end of the horizontal connecting portion away from the annular steel sleeve.

[0008] Further, the outer cylinder further comprises a mounting base fixed on the bridge pile cap, adjacent ring-shaped steel sleeves are fixedly connected through fastening bolts to form a steel sleeve unit, a plurality of rolling balls are rollingly mounted on the upper surface of the mounting base, and the bottom of the steel sleeve unit is provided with grooves matched with the rolling balls.

[0009] Further, a plurality of rubber air springs are distributed in the circumferential direction of the inner cavity of the outer cylinder, and gaps between adjacent rubber air springs are filled with energy-absorbing materials.

[0010] Further, the intermediate cylinder adopts a metal grid frame structure.

[0011] Further, the damping alloy energy dissipation structure comprises a plurality of damping alloy energy dissipation units distributed in the circumferential direction of the inner cavity of the intermediate cylinder, the damping alloy energy dissipation unit comprises an alloy shock absorber and a steel wire rope shock absorber, the alloy shock absorber is fixedly connected to the inner wall of the intermediate cylinder close to the inner cylinder, and the steel wire rope shock absorber is installed in the alloy shock absorber.

[0012] Further, the alloy shock absorber comprises an arc-shaped mounting portion, an arc-shaped connecting portion and a damping portion, one end of the arc-shaped mounting portion is attached to the inner wall of the intermediate cylinder, the damping portion is connected to the other end of the arc-shaped mounting portion through the arc-shaped connecting portion, one end of the steel wire rope shock absorber is fixedly connected to the damping portion close to the outer cylinder, and a gap exists between the other end of the steel wire rope shock absorber and the arc-shaped mounting portion.

[0013] Further, the alloy shock absorber adopts a high-manganese-based damping alloy material.

[0014] Further, the ring-shaped steel sleeve comprises a plurality of arc-shaped blocks which are spliced in the circumferential direction.

[0015] Further, the inner cylinder is fixed to the outer side of the bridge pier column through implantable expansion bolts, the intermediate cylinder is connected to the outer side of the inner cylinder through steel adhesive, the mounting base is connected to the outer side of the intermediate cylinder through steel adhesive, and the steel sleeve unit is rotatably connected to the outer side of the intermediate cylinder.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] The present application gradually dissipates energy through the anti-collision unit, the rubber air spring, the damping alloy energy dissipation structure and the inner cylinder filled with concrete, maximally reduces the impact energy of falling rocks, reduces the impact of the falling debris on the bridge pier structure, and thus good protection of the bridge pier is realized. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present application.

[0019] Figure 2 is the front view of the present application.

[0020] Figure 3 is the sectional view of the present application at A-A.

[0021] Figure 4 is the schematic diagram of the ring-shaped steel sleeve structure of the present application.

[0022] Figure 5 is the schematic diagram of the damping alloy energy dissipation structure of the present application.

[0023] Figure 6 is the schematic diagram of the ring rubber air spring structure of the present application.

[0024] Figure 7 is the schematic diagram of the mounting base structure of the present application.

[0025] Wherein, 1-inner cylinder, 11-concrete, 2-intermediate cylinder, 3-outer cylinder, 31-ring-shaped steel sleeve, 32-mounting base, 33-rolling ball, 4-anti-collision block, 41-horizontal connecting part, 42-arc-shaped energy dissipation part, 5-rubber air spring, 51-energy absorption material, 6-damping alloy energy dissipation structure, 61-alloy shock absorber, 62-steel wire rope shock absorber, 63-arc-shaped mounting part, 64-arc-shaped connecting part, 65-shock absorbing part, 7-bridge pier column. DETAILED DESCRIPTION

[0026] The technical solutions of the present application are further described below through the drawings and examples.

[0027] In combination Figures 1 to 7 , the present application provides a kind of energy dissipation device that can resist the impact of debris rolling stone, including by inner to outer sequentially set in bridge pier column 7 outer side's inner cylinder 1, intermediate cylinder 2 and outer cylinder 3, the outer side of the outer cylinder 3 is equipped with anti-collision unit, the inner cavity of the outer cylinder 3 is equipped with rubber air spring 5, the inner cavity of the intermediate cylinder 2 is equipped with damping alloy energy dissipation structure 6, the inner cavity of the inner cylinder 1 is filled with concrete 11, the outer cylinder 3 includes multiple ring-shaped steel sleeve 31 along the height direction of bridge pier column and is spliced, the anti-collision unit includes multiple anti-collision blocks 4 that are evenly distributed along the circumference of the ring-shaped steel sleeve 31.

[0028] In the embodiment, the anti-collision block 4 includes horizontal connecting part 41 and arc-shaped energy dissipation part 42, one end of the horizontal connecting part 41 is fixedly connected with the outer side of the ring-shaped steel sleeve 31, and the arc-shaped energy dissipation part 42 is fixedly arranged at one end of the horizontal connecting part 41 away from the ring-shaped steel sleeve 31. The anti-collision block 4 with arc-shaped structure is arranged on the outer side of the outer cylinder 3, and when the rolling stone falls and impacts the anti-collision block 4, the arc-shaped energy dissipation part 42 can change the direction of the rolling stone, and the impact resistance effect is better.

[0029] Preferably, the outer cylinder 3 further comprises a mounting base 32 fixed on the bridge bearing platform, adjacent annular steel sleeves 31 are fixed and connected in height direction by fastening bolts to form a steel sleeve unit, a plurality of rolling balls 33 are installed on the upper surface of the mounting base 32, and the bottom of the steel sleeve unit is provided with grooves matched with the rolling balls 33.

[0030] In the embodiment, the bottom of the inner cylinder 1 and the intermediate cylinder 2 is fixed on the top surface of the bridge bearing platform, the inner cylinder 1 is fixed on the outer surface of the bridge pier column by implanting expansion bolts, the intermediate cylinder 2 is connected to the outer surface of the inner cylinder 1 by steel adhesive, the mounting base 32 is connected to the outer surface of the intermediate cylinder 2 by steel adhesive, the bottom of the mounting base 32 is fixed on the top surface of the bridge bearing platform by fastening bolts, and the steel sleeve unit is rotatably sleeved and connected to the outer surface of the intermediate cylinder 2.

[0031] In the embodiment, the annular steel sleeve 31 comprises a plurality of arc-shaped blocks, the arc-shaped blocks are mutually spliced in the circumferential direction, and adjacent arc-shaped blocks are fixed and connected to each other by fastening bolts, so as to facilitate disassembly and installation.

[0032] In the embodiment, the outer surface of the mounting base 32 is also provided with an anti-collision unit (not shown in the figure). When the rolling stone falls and impacts the anti-collision block 4, the impact force is transmitted to the steel sleeve unit, and since the steel sleeve unit is connected to the mounting base 32 by the rolling balls 33, the steel sleeve unit can rotate at a certain angle when impacted, which is more easy to unload force, avoids direct impact, and since the steel sleeve unit is spliced by a plurality of annular steel sleeves 31, the annular steel sleeves 31 can be replaced individually when damaged, avoiding the waste of manpower and material resources caused by disassembling the entire outer cylinder 3.

[0033] Preferably, a plurality of rubber air springs 5 are distributed in the circumferential direction of the inner cavity of the outer cylinder 3, and the gap between adjacent rubber air springs is filled with energy-absorbing material 51.

[0034] In the embodiment, the rubber air spring has a nonlinear characteristic, which can play a role in energy dissipation and impact force reduction, and the energy-absorbing material is one or more of polyurethane foam, polyurethane elastomer, polystyrene foam, PVC foam, PMI foam, and polyimide foam. The rubber air spring combined with the energy-absorbing material is used for energy dissipation, and even if the rubber air spring is temporarily disabled after being impacted, it can be restored to use after being inflated and pressed without being completely damaged, and one rubber air spring can be replaced individually.

[0035] Preferably, the intermediate cylinder 2 adopts a metal grid frame structure. When the rolling stone falls and impacts the anti-collision block 4 and the outer cylinder 3, the impact force is transmitted to the intermediate cylinder 2, and the damping alloy energy dissipation structure 6 in the inner cavity of the intermediate cylinder 2 performs shock absorption and energy dissipation.

[0036] In the embodiment, the damping alloy energy dissipation structure 6 comprises a plurality of damping alloy energy dissipation units distributed circumferentially along the inner cavity of the intermediate cylinder body 2, the damping alloy energy dissipation units comprising an alloy shock absorber 61 and a steel wire rope shock absorber 62, the alloy shock absorber 61 being fixedly connected to the inner wall of the intermediate cylinder body 2 near the inner cylinder body 1, and the steel wire rope shock absorber 62 being installed inside the alloy shock absorber 61.

[0037] The alloy shock absorber 61 is made of high-manganese-based damping alloy material, and comprises an arc-shaped mounting portion 63, an arc-shaped connecting portion 64 and a shock-absorbing portion 65, one end of the arc-shaped mounting portion 63 being attached to the inner wall of the intermediate cylinder body 2, the shock-absorbing portion 65 being connected to the other end of the arc-shaped mounting portion 63 through the arc-shaped connecting portion 64, and one end of the steel wire rope shock absorber 62 being fixedly connected to the shock-absorbing portion 65 near the outer cylinder body 3, and the other end of the steel wire rope shock absorber 62 having a gap with the arc-shaped mounting portion 63.

[0038] The alloy shock absorber 61 made of high-manganese-based damping alloy material has a greatly increased support stiffness, and can better play a role in shock absorption and energy dissipation. The combination of the alloy shock absorber 61 and the steel wire rope shock absorber 62 further improves the energy dissipation effect and service life. When the impact force is not large, the deformation of the alloy shock absorber 61 after being impacted does not exceed a threshold value, and the alloy shock absorber 61 can work alone to absorb shock without using the steel wire rope shock absorber 62. When the deformation of the alloy shock absorber 61 is too large, the steel wire rope shock absorber 62 is in contact with the arc-shaped mounting portion 63, and at this time the steel wire rope shock absorber 62 absorbs shock and dissipates energy. The combination of the two has a better use effect. Even if the steel wire rope shock absorber 62 temporarily fails, it can be restored to use after correction, has a long service life, strong resistance to damage, and the like, and can be replaced alone.

[0039] In the embodiment, the inner cylinder body 1 adopts a spliced steel sleeve structure, and the rigid structure filled with concrete in the inner cavity thereof serves as the last layer of protection for the bridge pier column, has high hardness and great strength, and can well protect the bridge pier column.

[0040] The above description is only a preferred embodiment of the present application, and does not limit the technical scope of the present application in any way. Any slight modification, equivalent change and modification made according to the technical essence of the present application to the above embodiment still falls within the scope of the technical solution of the present application.

Claims

1. A dissipative device capable of resisting impact from rockfall debris, characterized in that, The application relates to a bridge pier protection device, which comprises an inner cylinder, an intermediate cylinder and an outer cylinder which are sequentially arranged from inside to outside on the outside of a bridge pier column, an anti-collision unit is arranged on the outside of the outer cylinder, rubber air springs are arranged in the inner cavity of the outer cylinder, a damping alloy energy dissipation structure is arranged in the inner cavity of the intermediate cylinder, the inner cavity of the inner cylinder is filled with concrete, the outer cylinder comprises a plurality of annular steel sleeves which are mutually spliced along the height direction of the bridge pier column, and the anti-collision unit comprises a plurality of anti-collision blocks which are uniformly distributed along the circumference of the annular steel sleeve. The damping alloy energy dissipation structure comprises a plurality of damping alloy energy dissipation units which are distributed along the circumference of the inner cavity of the intermediate cylinder, the damping alloy energy dissipation unit comprises an alloy shock absorber and a steel wire rope shock absorber, the alloy shock absorber is fixedly connected to the inner wall of the side of the intermediate cylinder which is close to the inner cylinder, and the steel wire rope shock absorber is arranged in the alloy shock absorber. The alloy shock absorber comprises an arc-shaped mounting portion, an arc-shaped connecting portion and a shock-absorbing portion, one end of the arc-shaped mounting portion is attached to the inner wall of the intermediate cylinder, the shock-absorbing portion is connected to the other end of the arc-shaped mounting portion through the arc-shaped connecting portion, one end of the steel wire rope shock absorber is fixedly connected to the side of the shock-absorbing portion which is close to the outer cylinder, and a gap exists between the other end of the steel wire rope shock absorber and the arc-shaped mounting portion.

2. A device according to claim 1, wherein the device is configured to resist the impact of a rockfall. The anti-collision block comprises a horizontal connecting portion and an arc-shaped energy dissipation portion, one end of the horizontal connecting portion is fixedly connected to the outside of the annular steel sleeve, and the arc-shaped energy dissipation portion is fixedly arranged at the end of the horizontal connecting portion which is away from the annular steel sleeve.

3. A device according to claim 1 or 2, wherein the device is configured to be installed in a position where it is subjected to the impact of a rock fragment or a rolling stone, and the device is configured to be installed in a position where it is subjected to the impact of a rock fragment or a rolling stone. The outer cylinder further comprises a mounting base which is fixed to a bridge bearing platform, adjacent annular steel sleeves are fixedly connected to form a steel sleeve unit through fastening bolts, a plurality of rolling balls are rollingly arranged on the upper surface of the mounting base, and the bottom of the steel sleeve unit is provided with grooves which are matched with the rolling balls.

4. A device according to claim 1, wherein the device is capable of resisting the impact of a rockfall. A plurality of rubber air springs are distributed along the circumference of the inner cavity of the outer cylinder, and an energy-absorbing material is filled in the gap between adjacent rubber air springs.

5. A device according to claim 1, wherein the device is capable of resisting the impact of a rockfall. The intermediate cylinder adopts a metal grating frame structure.

6. A device according to claim 1, wherein the device is capable of resisting the impact of a rockfall. The alloy shock absorber adopts a high-manganese-based damping alloy material.

7. A device according to claim 1, wherein the device is capable of resisting the impact of a rockfall. The annular steel sleeve comprises a plurality of arc-shaped blocks which are mutually spliced along the circumference.

8. A device according to claim 3, wherein the device is capable of resisting the impact of a rockfall. The inner cylinder is fixed to the outer side surface of the bridge pier column through implantation type expansion bolts, the intermediate cylinder is connected to the outside of the inner cylinder through steel adhesive, the mounting base is connected to the outside of the intermediate cylinder through steel adhesive, and the steel sleeve unit is rotatably connected to the outside of the intermediate cylinder.

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