A new type of assembled rotating energy-absorbing bridge pier anti-collision device

Abstract

The present invention discloses a novel assembled rotation energy dissipation bridge pier anti-collision device, the main structure of which includes a rotating layer surrounding the outside of the bridge pier, a rigid layer, a rotation limiting connection mechanism and a bottom track base plate. Vertical and horizontal pulleys are respectively installed on the bottom and side of the rotating layer, which cooperate with the bottom track base plate to rotate around the rigid layer within the limited range of the rotation limiting connection device. The present invention uses low-yield point steel and high-strength steel on the outside to form a thin film effect for deformation energy dissipation, and uses waste tires and the reaction force of the rigid layer on the inside to directly resist the impact, and then fully consumes the vehicle's kinetic energy through the rotation of the rotating layer and the rotation limiting mechanism. The present invention can achieve effective deformation and rotation energy dissipation, and it is an assembled structure that can be quickly installed and replaced.

Description

Technical Field

[0001] The invention relates to the technical field of bridge pier protection in bridge engineering, and in particular to a novel assembled rotating energy-consuming bridge pier anti-collision device. Background Art

[0002] In the process of modernization, bridges, as buildings that span special geographical environments and provide space for other traffic, are widely used in urban road construction in my country. With the improvement of people's quality of life, cars have become more and more the means of transportation for most people, which has also led to the continuous increase in the number of cars in my country. As land traffic becomes more and more busy, bridges have been widely used to relieve traffic pressure. Bridges can effectively relieve urban traffic pressure and improve urban operation efficiency. They have become an indispensable part of social life. It is precisely because of the continuous increase in the number of cars and bridges that accidents of cars hitting bridge piers have occurred frequently. When a car hits a bridge, once the bridge pier is damaged, it will seriously affect the normal use of the bridge. The resulting bridge maintenance costs, reconstruction costs and urban economic losses caused by road interruption are all very huge. Therefore, how to reduce the frequency of accidents caused by cars hitting bridge piers, how to reduce the degree of casualties when accidents occur, and how to protect bridge piers have attracted more and more attention. Reasonable anti-collision protection measures for bridge piers are not only an effective protection for people's lives, but also an effective protection for urban economic development.

[0003] There are three main types of traditional anti-collision measures for bridge piers: (1) directly casting a reinforced concrete anti-collision platform at the bottom of the bridge; (2) installing a complex mechanism outside the bridge pier to directly resist the impact of vehicles; (3) setting a rotatable device outside the bridge pier to consume the kinetic energy of the vehicle and change the vehicle's running trajectory by rotation. However, these anti-collision measures have the following four main defects: (1) directly casting the pier at the bottom of the bridge will affect the bridge's mechanical performance and it is impossible to replace the reinforced concrete anti-collision platform outside the bridge pier in time after it is damaged by impact; (2) whether it is casting reinforced concrete outside the bridge pier or setting a complex anti-collision mechanism, the construction process is complicated and the construction period is long, which is not conducive to the rapid restoration of urban traffic; (3) such devices that use rotation to dissipate energy and change the vehicle's trajectory are often difficult to make the device actually rotate when the vehicle hits due to the bulky structure and unreasonable internal structure, so such devices cannot achieve their expected effect. (4) A truly rotatable anti-collision device may change the vehicle's running trajectory during the rotation process, which will bring safety hazards to people and vehicles in adjacent lanes. Summary of the invention

[0004] The purpose of the present invention is to provide a new type of assembled rotating energy-absorbing bridge pier anti-collision device to solve the problems existing in the above-mentioned prior art. It can effectively dissipate the kinetic energy of the vehicle and stop the vehicle after turning a certain angle to avoid safety hazards. The anti-collision device also has the characteristics of convenient and fast on-site construction, which can greatly shorten the construction period and is conducive to the rapid restoration of urban traffic.

[0005] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a novel assembled rotating energy-absorbing bridge pier anti-collision device, comprising two rotating layer columns with semicircular bottom surfaces, two rigid layer columns with semicircular bottom surfaces, a track bottom plate and a limiting brake mechanism, wherein the two rotating layer columns and the two rigid layer columns are spliced ​​together by high-strength bolts;

[0006] The semicircular rotating layer column comprises a first rotating layer steel plate, a second rotating layer steel plate and a third rotating layer steel plate which are sequentially arranged in an arc shape from outside to inside, and the two ends of the first rotating layer steel plate, the second rotating layer steel plate and the third rotating layer steel plate are connected by a connecting steel plate in the middle of the rotating layer;

[0007] The semicircular rigid layer column comprises a rigid layer first steel plate and a rigid layer second steel plate which are sequentially arranged in an arc shape from outside to inside, and the two ends of the rigid layer first steel plate and the rigid layer second steel plate are connected by a rigid layer middle connecting steel plate;

[0008] The track bottom plate is welded from the inside to the outside in sequence by two bottom track upper steel plates with different diameters, two bottom track side steel plates with different diameters and a single bottom track lower steel plate into a U-shaped track, which is then connected and fixed to the ground by bottom track fixing bolts, and the bottom of the rotating layer column is slidably assembled in the U-shaped track;

[0009] Multiple groups of annular transverse stiffening ribs are welded from top to bottom on the outer wall of the third steel plate of the rotating layer, and a row of transverse pulleys are installed between the two transverse stiffening ribs of each group through a rotating pin shaft, and the transverse pulleys roll horizontally on the first steel plate of the rigid layer; the connecting steel plate in the middle of the rigid layer is concave and convex, which is concave at the place where there is a transverse stiffening rib and convex at the place where there is no transverse stiffening rib;

[0010] The limiting brake mechanism includes a spring and a spring hook. The vertical spring is installed between the vertical gaps of each layer of the horizontal pulley of the rotating layer column and the rigid layer column, and is 45 degrees to the axis of the device in the horizontal direction. The spring hooks are welded on the third steel plate of the rotating layer and the outside of the first steel plate of the rigid layer respectively. The spring hooks on both sides are located in the same plumb line direction, and the spring is connected to the two spring hooks.

[0011] Preferably, the top and bottom of the first steel plate of the rotating layer, the second steel plate of the rotating layer and the third steel plate of the rotating layer are respectively welded with an upper closed steel plate and a rotating layer bottom steel plate; a vertical pulley is installed under the bottom steel plate of the rotating layer, and the vertical pulley is installed on the second steel plate of the rotating layer and the third steel plate of the rotating layer through a rotating pin.

[0012] Preferably, arc-shaped sliding doors made of steel plates are respectively arranged at both ends of the outer side of the first steel plate of the rotating layer near the connecting steel plates in the middle of the rotating layer. When the sliding doors are opened, they will overlap the outer side of the first steel plate of the rotating layer.

[0013] Preferably, the cavity between the first rotating layer steel plate and the second rotating layer steel plate is filled with flexible energy absorbing material.

[0014] Preferably, multiple layers of cut waste tires are staggered and stacked from top to bottom between the second steel plate of the rotating layer and the third steel plate of the rotating layer. The waste tires are cut from complete waste tires into arc shapes with a central angle of 120 degrees, 150 degrees or 180 degrees, and each tire is stacked convexly outward, each layer of tires is squeezed and stacked against each other, and the middle position of each tire is located at the junction of two tires of adjacent layers.

[0015] Preferably, a steel bar fixing steel sheet is welded on the top of the second steel plate of the rigid layer close to the rotating layer, the steel bars are vertically fixed by the steel bar fixing steel sheet, and arc-shaped stirrups are horizontally arranged in the middle of the steel bars.

[0016] Preferably, a rigid layer T-shaped steel plate is vertically welded on the side of the second rigid layer steel plate close to the pier.

[0017] Preferably, bolt holes are respectively provided on the top and side of the middle connecting steel plate of the rotating layer, and the two rotating layer cylinders with semicircular bottom surfaces are connected into a whole by high-strength bolts; bolt holes are respectively provided on the top and side of the middle connecting steel plate of the rigid layer, and the two cylinders with semicircular bottom surfaces are connected into a whole by high-strength bolts.

[0018] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0019] 1. The present invention is a prefabricated structure, which can be prefabricated in a factory, facilitating industrial production;

[0020] 2. Each part is connected by high-strength bolts, which makes on-site construction convenient and quick, greatly shortening the construction period and facilitating the rapid restoration of urban traffic;

[0021] 3. The rotating layer is light in weight and has a pulley. A bottom track adapted to the pulley is provided, which can be rotated through the external rotating layer to truly realize the rotation energy consumption of the device;

[0022] 4. The rotating layer is connected to the internal rigid layer through multiple springs. By controlling the spring stiffness and length, the rotating layer can only rotate 90-120 degrees. As the angle of rotation of the vehicle driving device increases, the resistance provided by the mechanism increases, thereby effectively dissipating the kinetic energy of the vehicle and stopping the vehicle after turning a certain angle. This will not cause safety hazards to vehicles and pedestrians in other lanes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the main structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the top view of the structure of the present invention (excluding the upper sealing plate);

[0027] Figure 4 It is a bottom view structural schematic diagram of the present invention;

[0028] Figure 5 It is a schematic diagram of the bottom track structure of the present invention;

[0029] Figure 6 A schematic diagram of stacking waste tires of the present invention;

[0030] Figure 7 It is a schematic diagram of the spring connection method of the present invention.

[0031] In the figure: 0. Bridge pier, 10. First steel plate of rotating layer, 11. Second steel plate of rotating layer, 12. Waste tire, 13. Third steel plate of rotating layer, 14. Horizontal pulley, 15. Sliding door of rotating layer, 16. High-strength bolt, 17. Middle connecting steel plate of rotating layer, 18. Bottom steel plate of rotating layer, 19. Vertical pulley, 110. Horizontal stiffening rib, 20. T-shaped steel plate of rigid layer, 21. Middle connecting steel plate of rigid layer, 22. First steel plate of rigid layer, 23. Steel sheet for fixing steel bars, 24. Second steel plate of rigid layer, 25. Steel bars, 26. Concrete filling of rigid layer, 27. Bottom steel plate of rigid layer, 31. Spring, 32. Spring hook, 40. Bottom track lower steel plate, 41. Bottom track upper steel plate, 42. Bottom track side steel plate, 43. Bottom track fixing bolt. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The purpose of the present invention is to provide a new type of assembled rotating energy-absorbing bridge pier anti-collision device to solve the problems existing in the above-mentioned prior art. It can effectively dissipate the kinetic energy of the vehicle and stop the vehicle after turning a certain angle to avoid safety hazards. The anti-collision device also has the characteristics of convenient and fast on-site construction, which can greatly shorten the construction period and is conducive to the rapid restoration of urban traffic.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1-7 As shown, this embodiment provides a new type of assembled rotating energy-absorbing bridge pier anti-collision device, which is mainly composed of four parts: the first part is a rotating layer that surrounds the outermost side of the device and has a lighter mass; the second part is an internal rigid layer that surrounds the outer side of the bridge pier 0 and has a heavier mass and greater rigidity; the third part is a rotation limiting mechanism connecting the rotating layer and the rigid layer; and the fourth part is the bottom track base plate.

[0036] The rotating layer is composed of two semicircular cylinders connected by high-strength bolts. There are two chambers inside the rotating layer and a bottom pulley at the bottom of the rotating layer. The design contents of each part of the rotating layer are introduced below:

[0037] (1) The diameter of the bottom ring of the outermost chamber is small, and the four sides and the top and bottom are welded by the first steel plate 10 of the rotating layer, the second steel plate 11 of the rotating layer, the connecting steel plate 17 in the middle of the rotating layer, the bottom steel plate 18 of the rotating layer and the upper closed steel plate. Some lightweight energy-dissipating deformable materials are filled in the chamber. The first steel plate 10 of the rotating layer and the second steel plate 11 of the rotating layer are made of stainless steel or low-yield point steel, and are made into steel sheets with concave-convex surfaces. The yield strength of the material of the low-yield point steel plate can be selected to be 100MPa, 160MPa or 225Mpa. The use of stainless steel and low-yield point steel can dissipate energy through the deformation of the external steel plate during impact, thereby prolonging the impact time. Two arc-shaped rectangular rotating layer sliding doors 15 are made of steel plates near the connecting steel plate 17 in the middle of the rotating layer on the first steel plate 10 of the rotating layer. When the sliding doors are opened, they will overlap behind the first steel plate 10 of the rotating layer. Lightweight flexible energy-absorbing material is filled in the cavity between the first steel plate 10 of the rotating layer and the second steel plate 11 of the rotating layer, and the cavity near the sliding door is not filled for the time being. After the high-strength bolts 16 on the connecting steel plate 17 in the middle of the rotating layer are connected, the remaining space is filled and the sliding door is closed.

[0038] It shows that the concave-convex shape can increase the friction between the rotating layer and the vehicle. The use of thin stainless steel or low yield point steel can make the car embed into the outer surface layer of the present invention when the vehicle hits the structure, so that the rotating layer can better restrict the movement of the car. The third steel plate 13 of the rotating layer, the middle connecting steel plate 17 of the rotating layer and the upper and lower sealing plates of the rotating layer are made of high-strength steel, such as Q460 steel. The third steel plate 13 of the rotating layer is made of high-strength steel because it can provide sufficient reaction force for its external structure. The middle connecting steel plate and the upper and lower sealing plates of the rotating layer are made of high-strength steel because they can cooperate with the third steel plate 13 of the rotating layer to provide effective boundary constraints for the first steel plate 10 of the rotating layer and the second steel plate 11 of the rotating layer, so that the first steel plate 10 and the second steel plate of the rotating layer are subjected to reverse film tension after the vehicle hits the device through the film effect. Two arc-shaped dragging doors are provided near the middle connecting steel plate of each semicircular cylinder, which is convenient for sealing the protruding bolts and connecting steel plates in the outermost cavity after the bolts are installed, thereby avoiding the safety hazards caused by the protrusion of the bolts and connecting steel plates.

[0039] (2) The inner chamber bottom surface is relatively large in diameter, and is welded around and above and below by the second steel plate 11 of the rotating layer, the third steel plate, the middle connecting steel plate, and the upper and lower sealing plates. The cut waste tires 12 are stacked layer by layer in the chamber, and the middle position of each tire is located at the junction of two tires in the adjacent layer, which is convenient for resisting vehicle impacts from different directions. Each tire needs to be cut into an arc shape with a certain central angle and then squeezed and stacked in the chamber. Each tire bulges outward, so that an effective buffer layer can be formed by utilizing the protruding arc of the tire and the mutual squeezing force between the tires. In addition, the waste tires 12 can be recycled, which can save costs and achieve the purpose of energy saving and environmental protection. The third steel plate 13 of the rotating layer should be made of high-strength steel, which can provide sufficient reaction force when the tire is impacted. Ten arc-shaped transverse stiffening ribs 110 are welded on the outer wall of the third steel plate close to the rigid layer, wherein a row of transverse pulleys 14 are installed between every two transverse stiffening ribs 110 via a rotating pin. The transverse pulleys 14 are conducive to the effective rotation of the rotating layer around the outer wall of the rigid layer, and are convenient for directly transmitting the horizontal force exerted on the rotating layer to the rigid layer.

[0040] (3) A circle of vertical pulleys 19 is installed at the bottom of the rotating layer bottom plate. Compared with the traditional rotating anti-collision device, the bottom pulley effectively reduces the friction between the device and the ground, so that the device can truly rotate effectively after being hit. The internal rigid layer is composed of two semicircular cylinders with a bottom surface spliced ​​by high-strength bolts. The rigid layer is welded to form a chamber by the first rigid layer steel plate 22, the second rigid layer steel plate 24, the middle rigid layer middle connecting steel plate 21 with a concave-convex shape in the middle, and the bottom rigid layer steel plate 27. In order to ensure that the transverse pulley 14 of the rotating layer can rotate smoothly on the wall of the first rigid layer steel plate 22, the middle connecting steel plate is set to be concave-convex. A steel bar is erected at a certain distance in the rigid layer chamber. The vertical steel bar is connected and fixed to the upper steel bar fixing steel sheet 23. A transverse annular stirrup is provided in the middle of the vertical steel bar to provide the overall impact resistance of the rigid layer. The remaining space in the chamber is filled with concrete. At this time, the external steel plate can be used as a template when pouring concrete, and can also improve the deformation capacity and impact resistance of the entire rigid layer. Five T-shaped steel plates are welded on the outer wall of the second steel plate of each rigid layer close to the bridge pier 0. The T-shaped steel plates can enhance the overall stability of the rigid layer. Due to its high rigidity and strong overall stability, the rigid layer can provide sufficient reaction force and support for the rotating layer when the entire device is hit, ensuring that the elastic material in the rotating layer can fully play its role and prevent the bridge pier from being damaged by the impact.

[0041] The rotation limiting mechanism is composed of a spring 31 and a spring hook 32. The vertical spring is installed between the vertical gaps of each horizontal pulley 14 of the rotating layer and the rigid layer, and is at a 45-degree angle with the device axis in the horizontal direction. The bottom of the spring 31 is connected to the rotating layer, and the top is connected to the rigid layer. When the device rotates, the tension generated by the spring 31 gradually increases with the increase of the rotation angle. By controlling the stiffness and length of each spring 31, the tension of the rotating layer reaches the maximum after rotating 90 to 120 degrees, and the rotating layer cannot continue to rotate. When a vehicle collision occurs, the kinetic energy of the vehicle can be consumed by the tension of the spring 31 and the rotation of the rotating layer to stop the vehicle.

[0042] The bottom track is a U-shaped track formed by welding five steel plates. Specifically, the bottom track bottom plate is welded from the inside to the outside to form a U-shaped track with two bottom track upper steel plates 41 with different diameters, two bottom track side steel plates 42 with different diameters, and a bottom track lower steel plate 40. Then it is connected and fixed to the ground through the bottom track fixing bolts 43. The U-shaped track groove is embedded in the ground, and its size is adapted to the bottom vertical pulley. The vertical pulley 19 can roll in the track below the ground, which can effectively enhance the overall stability of the rotating layer. The steel plates on both sides of the vertical pulley 19 can be accurately measured and calculated to ensure that only a small gap is formed between the vertical pulley 19 and the steel plate ground after it is placed in the track. Rolling on the track bottom plate can form a tighter device than the pulley rolling directly on the ground, which can effectively prevent external garbage from entering the device and affecting the normal sliding of the pulley.

[0043] In this embodiment, the free space of the first chamber and the second chamber of the rotating layer can be filled with lightweight flexible energy-absorbing and deformable materials such as foamed aluminum or foam. The waste tire 12 can cut the complete tire into angles with a central angle of 120 degrees, 150 degrees, 180 degrees, etc., and squeeze and stack them. The two ends of the spring 31 that limits rotation are hooked on the spring hook 32. In the gap between every two transverse pulleys 14, the spring hook 32 on one side of the rotating layer is installed at the bottom of the gap, and the spring hook 32 on one side of the rigid layer is installed at the top of the gap. Finally, the spring 31 is vertically hooked on the two spring hooks 32.

[0044] The rigid layer is welded with steel plates around and on the bottom, and a reinforced concrete structure is cast inside. An upper cover plate may not be arranged on the upper part of the rigid layer; further, several drainage holes need to be opened on the bottom steel plate of the U-shaped track for drainage.

[0045] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0046] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An assembled rotating energy-dissipating bridge pier anti-collision device, Features: It includes two rotating layer columns with semicircular bottom surfaces, two rigid layer columns with semicircular bottom surfaces, a track bottom plate and a limiting brake mechanism. The two rotating layer columns and the two rigid layer columns are spliced ​​together by high-strength bolts. The semicircular rotating layer column comprises a first rotating layer steel plate, a second rotating layer steel plate and a third rotating layer steel plate which are sequentially arranged in an arc shape from outside to inside, and the two ends of the first rotating layer steel plate, the second rotating layer steel plate and the third rotating layer steel plate are connected by a connecting steel plate in the middle of the rotating layer; The semicircular rigid layer column comprises a rigid layer first steel plate and a rigid layer second steel plate which are sequentially arranged in an arc shape from outside to inside, and the two ends of the rigid layer first steel plate and the rigid layer second steel plate are connected by a rigid layer middle connecting steel plate; The track bottom plate is welded from the inside to the outside in sequence by two bottom track upper steel plates with different diameters, two bottom track side steel plates with different diameters and a single bottom track lower steel plate into a U-shaped track, which is then connected and fixed to the ground by bottom track fixing bolts, and the bottom of the rotating layer column is slidably assembled in the U-shaped track; Multiple groups of annular transverse stiffening ribs are welded from top to bottom on the outer wall of the third steel plate of the rotating layer, and a row of transverse pulleys are installed between the two transverse stiffening ribs of each group through a rotating pin shaft, and the transverse pulleys roll horizontally on the first steel plate of the rigid layer; the connecting steel plate in the middle of the rigid layer is concave and convex, which is concave at the place where there is a transverse stiffening rib and convex at the place where there is no transverse stiffening rib; The limiting brake mechanism includes a spring and a spring hook. The vertical spring is installed between the vertical gaps of the rotating layer column and each layer of the horizontal pulley of the rigid layer column, and is at a 45-degree angle with the device axis in the horizontal direction. The spring hooks are welded on the third steel plate of the rotating layer and the outer side of the first steel plate of the rigid layer respectively. The spring hooks on both sides are located in the same plumb line direction, and the spring is connected to the two spring hooks. The top and bottom of the first rotating layer steel plate, the second rotating layer steel plate and the third rotating layer steel plate are respectively welded with an upper closed steel plate and a rotating layer bottom steel plate; a vertical pulley is installed below the rotating layer bottom steel plate, and the vertical pulley is installed on the second rotating layer steel plate and the third rotating layer steel plate through a rotating pin shaft; Arc-shaped sliding doors made of steel plates are respectively arranged at the two ends of the outer side of the first steel plate of the rotating layer near the connecting steel plate in the middle of the rotating layer. When the sliding doors are opened, they will overlap the outer side of the first steel plate of the rotating layer.

2. The assembled rotating energy-dissipating bridge pier anti-collision device according to claim 1, Features: The cavity between the first rotating layer steel plate and the second rotating layer steel plate is filled with flexible energy absorbing material.

3. The assembled rotating energy-dissipating bridge pier anti-collision device according to claim 1, Features: Multiple layers of cut waste tires are stacked and offset from top to bottom between the second steel plate of the rotating layer and the third steel plate of the rotating layer. The waste tires are cut from complete waste tires into arc shapes with a central angle of 120 degrees, 150 degrees or 180 degrees, and each tire is stacked convexly outward. Each layer of tires is squeezed and stacked against each other, and the middle position of each tire is located at the junction of two tires of adjacent layers.

4. The assembled rotating energy-dissipating bridge pier anti-collision device according to claim 1, Features: A steel bar fixing steel sheet is welded on the top of the second steel plate of the rigid layer close to the rotating layer, the steel bars are vertically fixed by the steel bar fixing steel sheet, and arc-shaped stirrups are horizontally arranged in the middle of the steel bars.

5. The assembled rotating energy dissipation bridge pier anti-collision device according to claim 1, Features: A rigid layer T-shaped steel plate is vertically welded on the second rigid layer steel plate on the side close to the bridge pier.

6. The assembled rotating energy dissipation bridge pier anti-collision device according to claim 1, Features: Bolt holes are respectively arranged on the top and side of the middle connecting steel plate of the rotating layer, and the two rotating layer cylinders with semicircular bottom surfaces are connected into a whole by high-strength bolts; bolt holes are respectively arranged on the top and side of the middle connecting steel plate of the rigid layer, and the two cylinders with semicircular bottom surfaces are connected into a whole by high-strength bolts.

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