Buffering anti-collision device of pier

Abstract

The invention belongs to the technical field of bridge pier collision prevention, and particularly provides a buffer collision prevention device and a bridge, the device adopts a barrel as an outer side structure, the barrel is extruded and deformed by direct collision to dissipate energy, the deformed barrel can indirectly transfer impact energy to a nearby barrel through internal liquid flow, so that the barrel expands and deforms to dissipate energy, and the energy consumption is reduced. Meanwhile, impact possibly drives vortex water flow formed in the barrel to consume energy, impact can be transmitted to the energy consumption columns to enable the energy consumption columns to deform and consume energy, the chains connect the corresponding energy consumption units into a whole, the impact resistance is higher, the barrel is prevented from being disengaged from the energy consumption columns due to impact, other barrels and the energy consumption columns on the same chain can be driven to consume energy, and the service life of the energy consumption columns is prolonged. The device adopts a three-stage energy dissipation series-parallel connection system, is good in deformability, is favorable for prolonging the service life of the device, can have a good energy dissipation effect under larger and smaller impact loads, and meanwhile, does not lose an anti-collision function as a whole due to damage of a certain unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge pier anti-collision, in particular to a buffer anti-collision device and a bridge. BACKGROUND

[0002] With the rapid development of social economy, the number of motor vehicles, driving speed and carrying capacity are further significantly improved, whether in the construction project or the existing bridge (especially for the existing old bridge, railway bridge) is always in the risk of suffering serious impact damage, leading to collapse and even line closed for a long time.

[0003] However, in the current bridge pier collision protection, the common concrete guardrails are difficult to effectively dissipate impact energy, and are prone to cause secondary injury to the people on the vehicle. SUMMARY

[0004] The purpose of the present application is to solve the problem that the anti-collision device in the prior art cannot simultaneously protect the protected structure and the impact object, and to provide a buffer anti-collision device and a bridge.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is: In a first aspect, a buffer anti-collision device is provided, comprising: Energy dissipation column, arranged at intervals, the energy dissipation column has a first through hole for passing a chain; The cylinder is provided with a mounting groove at the bottom, and the cylinder is provided with a second through hole for passing the chain, the size of the mounting groove is matched with the size of the energy dissipation column, the cylinder is filled with liquid, and the adjacent two cylinders are connected by a hose; Chain.

[0006] The energy dissipation column can be made of materials such as soft steel, carbon fiber, etc., and can be wrapped with a protective soft package, or can be directly arranged in the cylinder. The cross section of the energy dissipation column can be rectangular, circular, round end shape, etc., and the cross section shape of the cylinder can also be selected according to the need. The height, material, performance, etc. of the energy dissipation column, the size of the cylinder, the filled liquid and the filling rate are determined according to the protection requirements. During normal use, the liquid should be filled, such as water, oil, etc. The liquid in the cylinder should not be filled full, so that the liquid in the cylinder under impact can flow into the nearby cylinder.

[0007] The buffer anti-collision device can be enclosed into a circle or form a protection section according to the protected structure and its position, and the shape of the enclosure can also be selected according to the actual need. The same chain can be selected according to the actual need to pass through the whole or the local anti-collision unit.

[0008] The buffer anti-collision device has the advantages that the cylinder is directly subjected to impact and can be deformed to dissipate energy, the impact force can be transmitted to the energy dissipation column to make it deform and dissipate energy, the impact object cannot directly impact the energy dissipation column, the impact object can be effectively protected, the deformed cylinder can indirectly transmit the impact energy to the adjacent cylinder through the internal liquid flow to make the adjacent cylinder swell and dissipate energy, the vortex flow formed in the cylinder can dissipate energy by itself, the impact can be transmitted to the energy dissipation column to make it deform and dissipate energy, the chain links the energy dissipation units to form a whole, the anti-impact capacity is higher, the chain is not easy to be damaged and fail, the chain can provide a limiting function to prevent the cylinder from being separated from the energy dissipation column, the chain can drive the remaining cylinders and energy dissipation columns to dissipate energy, the service life of the device is prolonged, the device has a three-stage energy dissipation series-parallel system, has good deformation capacity, has good energy dissipation effect under large and small impact loads, the series-parallel anti-collision system has good reliability, has high practicability, good economic benefits, excellent anti-collision performance, and can realize double protection of the protected object and the impact object.

[0009] The device does not need to be directly connected with the protected object, is more independent in installation, is more convenient to replace, and has a wider application range.

[0010] Preferably, the cylinder is provided with baffles on both sides, the baffle plates face the cylinder, and the baffles are detachably connected to the chain.

[0011] The baffles on both sides can extrude the cylinder along the tension direction of the chain and make the energy dissipation column deform and dissipate energy, effectively form a multi-stage collaborative energy dissipation mechanism, not lose the anti-collision function as a whole due to damage of individual units, have high failure tolerance, and have good reliability.

[0012] Preferably, the baffle includes a first panel and a second panel, and the first panel and the second panel are respectively provided with a plug slot and a plug plate that are matched with each other.

[0013] Preferably, the communication hose is connected to the top surface of the cylinder, and the communication hose is provided with a flow divider.

[0014] Preferably, the energy dissipation column is arranged in a reserved groove on the top surface of the foundation, the energy dissipation column is a steel pipe, and the height of the energy dissipation column is 1.2-1.5 m. Preferably, 2-4 chains are connected between adjacent two energy dissipation columns, and the chains are arranged in the vertical direction.

[0015] Preferably, the cylinder is a plastic component.

[0016] Preferably, the chain is replaced by a cable and a woven belt.

[0017] Preferably, the cross section of the cylinder is circular. In a second aspect, a bridge is provided, wherein the bridge piers are provided with a buffer anti-collision device as described above.

[0018] In summary, due to the adoption of the above technical solutions, the application has the following beneficial effects: 1. The buffer anti-collision device of the application uses a cylinder as an outer structure, which can directly absorb the impact energy by being extruded and deformed. Since not all cylinders are impacted or impacted uniformly, the deformed cylinder can indirectly transmit the impact energy to the nearby cylinders through the internal liquid flow, causing them to expand and deform to dissipate energy. The vortex flow formed inside the cylinder can also dissipate energy by itself. The impact is also transmitted to the energy dissipation columns, causing them to deform and dissipate energy. The chain connects the corresponding energy dissipation units into a whole, making the anti-impact ability higher and providing a limiting function to prevent the cylinder from being extruded out of the energy dissipation column due to impact. It also helps to drive the remaining cylinders and energy dissipation columns on the same chain to dissipate energy, which helps to prolong the service life of the device. The device uses a three-stage energy dissipation series-parallel system, which has good deformation ability and good energy dissipation effect under both large and small impact loads. It also ensures the reliability of the series-parallel anti-collision system and has strong practicality, good economic benefits, excellent anti-collision performance, and can achieve double protection of the protected object and the impact object.

[0019] 2. The bridge of the application has a reasonable and effective anti-collision system, which helps to protect people's lives and property and achieve long-term safe operation of the line. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a three-dimensional schematic view of a buffer anti-collision device of embodiment 1; Figure 2 is a three-dimensional schematic view of a buffer anti-collision device of embodiment 1 (part of the energy dissipation column and the cylinder are not shown); Figure 3 is a three-dimensional structural schematic view of the cylinder of embodiment 1; Figure 4 is a sectional view schematic view of the cylinder of embodiment 1; Figure 5 is a bottom view schematic view of the cylinder of embodiment 1; Figure 6 is a three-dimensional structural schematic view of the energy dissipation column of embodiment 1; Figure 7 is a connection schematic view of the baffle and the chain of embodiment 1; Figure 8 is an exploded schematic view of the baffle of embodiment 1; Figure 9is a schematic diagram of the installation state of a buffer crashworthy device of Example 1; Fig. 10(a) is a time history curve of impact force; Fig. 10(b) is a curve of vehicle energy change; Fig. 11(a) is a time history curve of vehicle-device impact force; Fig. 11(b) is a time history curve of device-pier impact force; Fig. 11(c) is a curve of energy change of the crashworthy device; Fig. 11(d) is a simulation diagram of the overall deformation of the crashworthy device in the impact state; Fig. 11(e) is a simulation diagram of the water density distribution of the crashworthy device in the impact state; Fig. 11(f) is a simulation diagram of the deformation of the energy dissipation column and the chain in the impact state of the crashworthy device.

[0021] Fig.: 0-base, 1-energy dissipation column, 11-first through hole, 2-cylinder, 21-mounting groove, 22-second through hole, 3-chain, 4-communication hose, 5-baffle, 51-first panel, 52-second panel, 53-slot, 54-insert plate. DETAILED DESCRIPTION

[0022] The application will be further described in conjunction with specific embodiments. However, it should not be understood as limiting the above-mentioned subject matter of the application to the following embodiments only, and any technology implemented based on the content of the application falls within the scope of the application.

[0023] In the description of the specific embodiments of the application, the orientation or positional relationship terms such as "up", "down", "left", "right", "center", "inner", "outer", etc. appearing without special indication are expressed based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship used when the product / equipment / device of the application is placed. These orientation or positional relationship terms are only for the convenience of describing the application scheme or simplifying the description in the specific embodiments, for the convenience of the technical personnel to quickly understand the scheme, and are not intended to indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship, and therefore cannot be understood as a limitation on the application.

[0024] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or overhanging or parallel, but can be slightly inclined or have a deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. Alternatively, it can be simplified to understand that the corresponding device / component / element is arranged in the direction of "horizontal", "vertical", "overhanging", "parallel" and the like, and can have an error / deviation of ±10% relative to the corresponding direction, more preferably an error / deviation of ±8%, more preferably an error / deviation of ±6%, more preferably an error / deviation of ±5%, more preferably an error / deviation of ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the present application.

[0025] In addition, the terms "first", "second", "third" and the like in the terms are only used to distinguish the same or similar components for description, and should not be understood as emphasizing or implying the relative importance of the specific components.

[0026] In addition, in the description of the embodiments of the present application, "several", "a plurality of", "several" represent at least 2. It can be 2, 3, 4, 5, 6, 7, 8, 9, etc. Any case, it can even be more than 9.

[0027] In addition, in the description of the technical solutions of the present application, unless otherwise specified / limited / limited, the terms "arrangement", "installation", "connection", "connection", "provided with", "laid", "arrangement" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, which can be welding, riveting, bolting, screwing, etc. The connection means commonly used in the art. Such connection can be mechanical connection, electrical connection or communication connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the communication between two elements.

[0028] Embodiment 1 As shown in Figures 1-9 A buffer anti-collision device comprises: Energy-consuming columns 1 are arranged at intervals, and the energy-consuming columns 1 have first through holes 11 for passing through chains 3; A cylinder 2 is provided with a mounting groove 21 at the bottom, and the cylinder 2 is provided with a second through hole 22 for passing through the chain 3, the size of the mounting groove is matched with the size of the energy-consuming column 1, and the cylinder 2 is filled with liquid, and adjacent two cylinders 2 have a communication hose 4; The chain 3.

[0029] Specifically, in the present embodiment, a foundation 0 is arranged outside the protected structure, the top surface of the foundation 0 is adapted to the ground, and the foundation 0 can adopt cast-in-place or prefabricated reinforced concrete or plain concrete structure, such as a depth of 1m-1.2m, and the foundation 0 can be an independent structure or a structure shared with the protected object. A plurality of reserved slots are arranged on the top surface of the foundation 0, as shown in Figure 2 , the size of the reserved slot can be a depth of 0.5m, the cross-sectional size is adapted to the cross-sectional size of the energy dissipation column 1, and the connection mode of the foundation 0 and the energy dissipation column 1 can refer to the existing column installation mode. For example, the energy dissipation column 1 adopts a square steel pipe with a side length of 10-20cm and a thickness of 5-20mm, and the material can be Q235, Q355 steel and other soft steel with good plasticity, and the height of the energy dissipation column 1 can be freely set according to the protection requirements, such as 1.2-1.5m above the ground, and the column body is provided with 2-4 first through holes 11 arranged at intervals along the height, as shown in Figure 6 .

[0030] The cylinder body 2 adopts a circular cross section, and the shape and size of the installation slot 21 are adapted to the shape and size of the energy dissipation column 1. The height of the cylinder body 2 can be set as needed, which can be adapted to the height of the energy dissipation column 1 or higher than the energy dissipation column 1. The connecting hose 4 is arranged on the top surface of the cylinder body 2 and can be connected by a quick connector. The connecting hose 4 can be a polyurethane pressure-resistant hose with a diameter of 4-20mm, a corrugated pipe or the like, and a flow divider can be arranged in the connecting hose 4 to further increase the damping coefficient. The cylinder body 2 can be made of HDPE material or the like. The cylinder body 2 is provided with a corresponding number of second through holes 22, as shown in Figures 3-5 .

[0031] The chain 3 is arranged through a plurality of energy dissipation columns 1 and cylinder bodies 2 through the second through holes 22 and the first through holes 11. The chain can also be replaced by a cable and a woven belt.

[0032] The cylinder body 2 is provided with a baffle 5 on both sides, and the baffle 5 is arranged on the chain 3. The baffle 5 includes a first panel 51 and a second panel 52, and the first panel 51 and the second panel 52 are respectively provided with a slot 53 and a plate 54 which are adapted to each other, as shown in Figures 7-8 , which is convenient for horizontal and vertical installation. The baffle 5 can be arranged in a group with an interval of 1-3 cylinder bodies 2, or one baffle 5 can be arranged on both sides of the two most edge cylinder bodies 2 on the same side, as shown in Figure 9 .

[0033] The cylinder body 2 can be separately provided with a liquid adding port, or the liquid can be added through the interface for connecting the connecting hose 4. The cylinder body 2 can be restored by inflation, liquid filling and the like after deformation, and is also convenient for repeated use, low maintenance cost, and the liquid shortage in the cylinder body 2 can be easily identified and maintained.

[0034] For example, for protecting the bridge pier, the bridge pier can be surrounded by the device, as shown in Figure 9The anti-collision device can adopt a surrounding arrangement or a linear arrangement, etc. The arrangement distance between the anti-collision device and the protected object can be selected according to the actual environment, the structure and type of the protected object, etc.

[0035] A simulation analysis model considering geometric, material and contact nonlinearities is established by using finite element technology. The vehicle speed under the calculation condition is 30 km / h, the total mass of the vehicle is 50 t, the vehicle impacts in the transverse bridge direction, the impact height is 0.1 m, and the initial total kinetic energy is about 1850 KJ.

[0036] The simulation analysis results are as follows: (1) Time history curve of impact force and energy change without anti-collision measures As shown in FIG. 10(a) and FIG. 10(b), when there is no any anti-collision measure, the impact force under the calculation condition appears twice, which is consistent with the actual situation, and the maximum impact force is about 348 tons. After the impact event occurs, the deformation of the vehicle head is serious, and personnel casualties and serious impact damage to the bridge structure are likely to occur.

[0037] (2) Time history curve of impact force and energy change when the device is used Calculation condition: base 0 adopts C40 concrete, the constitutive model used for material is continuous cap model (CSCM), and the length, width and height dimensions are 5 m x 1 m x 1.5 m respectively. Square energy dissipation column 1 is inserted into the base 0 with a depth of 1 m, the height above the ground is 1.2 m, the side length is 10 cm, the thickness is 5 mm, and the material is Q235 soft steel. The cylinder 2 adopts polyethylene material, the diameter is 0.5 m, the height is 2 m, the thickness is 4 mm, and the top adopts pressure-resistant hose to be connected with each other. The chain 3 and the baffle 5 are simulated by using Q235 soft steel material.

[0038] According to Fig. 11 (a) - Fig. 11 (f), the device-bridge pier impact force reduction rate reaches 94.97% after the calculation of working conditions, and the maximum peak force is reduced to about 175t. The vehicle-device impact force reduction rate reaches 70.98%, and the maximum impact force peak is reduced to 101t. The overall linkage of the device is good, and the liquid inside the outer sleeve body 2 can convert the impact energy into fluid velocity and deformation of the nearby sleeve body 2. At the same time, the sleeve body 2 can effectively transmit the load to the energy dissipation column 1, so that it plastically deforms and dissipates energy. Under the action of the chain and the block, the bucket and the column do not separate, and have good reliability. The device absorbs energy of 710KJ, which is 38.4% of the total energy, and has good energy absorption effect. The overall deformation capacity is strong, which greatly reduces the impact load of the vehicle, and plays a good protective role for the protective facilities and the personnel on the vehicle. In summary, the device has good linkage and can realize the effect of "flexible sleeve body-column deformation-chain linkage" three-stage energy dissipation series-parallel system, improve the anti-collision ability, and is suitable for important facilities, highway protection and other protection engineering projects.

[0039] In some optional embodiments, the cross-sectional size of the energy dissipation column 1 can be circular, I-shaped, etc., and the cross-section of the sleeve body 2 can also be freely selected. The buffer anti-collision device of the application has the advantages that the sleeve body 2 is used as an external structure and can directly dissipate energy by being extruded and deformed under impact, and since not all sleeve bodies are impacted or uniformly impacted, the deformed sleeve body 2 can indirectly transmit the impact energy to the nearby sleeve bodies through the internal liquid flow, so that the sleeve bodies are expanded and deformed to dissipate energy. At the same time, the vortex flow formed in the sleeve body can also dissipate energy by itself, and the impact can also be transmitted to the energy dissipation column 1 to deform and dissipate energy. The chain 3 connects the corresponding energy dissipation units into a whole, has higher impact resistance, can also provide a limiting function to prevent the sleeve body 2 from being pulled out of the energy dissipation column 1 due to impact, can facilitate the remaining sleeve bodies 2 and energy dissipation columns 1 on the same chain to dissipate energy, and can prolong the service life of the device. The device has good deformation capacity, can have good energy dissipation effect under large and small impact loads, and does not lose the anti-collision function as a whole due to damage of a single unit, thereby forming a series-parallel anti-collision system with good reliability, high practicality, good economic benefits, excellent anti-collision performance, and the ability to realize double protection of the protected object and the impact object.

[0040] Example 2 The bridge of the application is provided with a buffer anti-collision device as described above around the bridge pier, as shown in Fig. 11 (a) - Fig. 11 (f). Figure 9 In this embodiment, only a rectangular structure is shown, and the shape is not limited in practice. It can also be circular.

[0041] The rectangular enclosure structure in the embodiment can be arranged along the circumference, and only two adjacent cylinder bodies 2 on the same side are provided with the communication hose 4, and the corners are connected through the chain 3.

[0042] The bridge adopting the application has a reasonable and effective anti-collision system, which is beneficial to guarantee the safety of people's life and property and realize long-term safe operation of the line.

[0043] The above are only the preferred embodiments of the present application and are not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bumper crash device, characterized in that, The application relates to a buffer anti-collision device for bridge piers. The energy-consuming column (1) is arranged at intervals and has a first through hole (11) for penetrating a chain (3); a cylinder (2) is arranged at the bottom of the cylinder (2) and is provided with a mounting groove (21) and a second through hole (22) for penetrating the chain (3); the size of the mounting groove is matched with the size of the energy-consuming column (1); the cylinder (2) is filled with liquid; two adjacent cylinders (2) are connected by a communicating hose (4); and the chain (3) is arranged between the two energy-consuming columns (1). The cylinder (2) is provided with a baffle (5) on both sides, the baffle (5) is detachably connected to the chain (3), and the baffle (5) is provided with a first panel (51) and a second panel (52) which are respectively provided with a plug groove (53) and a plug plate (54). The communicating hose (4) is connected to the top surface of the cylinder (2), and the communicating hose (4) is provided with a flow divider.

2. A shock-absorbing crash cushion as defined in claim 1, wherein The energy-consuming column (1) is arranged in a reserved groove on the top surface of a foundation (0), the energy-consuming column (1) is a steel pipe, and the height of the energy-consuming column (1) is 1.2-1.5 m.

3. A shock-absorbing crash device according to claim 2, characterised in that Two to four chains (3) are arranged between two adjacent energy-consuming columns (1) and are arranged in the vertical direction.

4. A shock-absorbing crash device according to claim 1, characterized in that The cylinder (2) is a plastic component.

5. A shock-absorbing crash protection device according to any one of claims 1-4, characterized in that The chain (3) is replaced by a cable and a woven belt.

6. A shock-absorbing crash cushion according to claim 5, wherein The cross section of the cylinder (1) is circular.

7. A shock-absorbing crash cushion as defined in claim 5, wherein The bridge pier is provided with the buffer anti-collision device as claimed in any one of claims 1-9.

8. A shock-absorbing crash cushion as defined in claim 5, wherein ​ 9. A shock-absorbing crash cushion as defined in claim 5, wherein ​ 10. A bridge, characterized by ​

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