Grid bamboo joint energy-dissipation crash bearer filled with polyethylene foam

Abstract

The utility model relates to a grid bamboo joint energy consumption crash bearer filled with polyethylene foam, and belongs to the technical field of traffic protection facilities. The anti-collision pier comprises a square shell barrel, a sealing end panel and a mounting end plate, a nine-square-grid structure composed of nine square thin-walled pipes is arranged in the anti-collision pier, and bamboo joint blocks are arranged on the periphery of each thin-walled pipe and filled with polyethylene foam. Due to the unique structural design of the anti-collision pier, impact force can be effectively absorbed and dissipated when the anti-collision pier is impacted, excessive displacement of an automobile can be prevented, potential damage can be reduced, and the anti-collision pier is good in construction machinability and wide in application prospect.

Description

Technical Field

[0001] The utility model belongs to the technical field of traffic protection facilities, and in particular relates to a square bamboo-joint energy-absorbing anti-collision pier filled with polyethylene foam. Background Art

[0002] In order to reduce the serious consequences of traffic accidents, engineers began to study and develop various buffer-type anti-collision facilities to improve the resistance of engineering structures when they are hit. Among them, anti-collision piers, as an important safety protection equipment, have attracted widespread attention due to their excellent anti-collision performance and wide applicability.

[0003] At present, the design and manufacture of crash barriers have achieved certain results and have been widely used in practical projects. However, with the increase in traffic volume and the increasing complexity of engineering structures, the performance requirements for crash barriers are also increasing. Therefore, how to further study and optimize the design of crash barriers and improve their crash resistance and applicability is still an important topic in the current field of traffic safety. Utility Model Content

[0004] In view of the problems caused by collisions caused by traffic accidents in the background technology, the existing anti-collision pier structure design is difficult to better absorb and disperse the impact energy, thereby causing damage to the engineering structure. Therefore, the utility model provides a square bamboo energy-absorbing anti-collision pier filled with polyethylene foam.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a square bamboo energy-absorbing anti-collision pier filled with polyethylene foam, comprising a square outer shell cylinder, wherein a sealing end panel and a mounting end plate are respectively arranged at the two ends of the square outer shell cylinder, and a nine-square grid thin-walled tube is arranged in a cavity surrounded by the three. The nine-square grid thin-walled tube is composed of nine square thin-walled tubes arranged in an array, and bamboo blocks are arranged on the outer side walls around each square thin-walled tube, and multiple groups of bamboo blocks are evenly distributed along the axial direction. The nine-square grid thin-walled tube and the square outer shell cylinder, and between two adjacent square thin-walled tubes are connected by bamboo blocks, and each square thin-walled tube is filled with polyethylene foam.

[0006] As a further supplementary explanation of the above technical solution, a plurality of energy-absorbing materials are arranged between the nine-grid thin-walled tube and the square outer shell cylinder, and a through hole is arranged on each of the energy-absorbing materials corresponding to the square thin-walled tube.

[0007] As a further supplement to the above technical solution, the energy-consuming material is any one of open-cell foamed aluminum or foamed steel slag.

[0008] As a further supplement to the above technical solution, the square thin-walled tube is made of a hollow aluminum alloy plate.

[0009] As a further limitation of the above technical solution, the cross-sectional dimensions of the square outer shell cylinder are: length 0.5m, width 0.5m, and plate thickness 0.0175m.

[0010] As a further limitation of the above technical solution, the cross-sectional dimensions of the square thin-walled tube are: length 0.14m, width 0.14m, and plate thickness 0.01m.

[0011] As a further limitation of the above technical solution, the dimensions of the bamboo block are: width is 0.0075m, thickness is 0.020m.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1. The utility model uses the square bamboo energy-absorbing anti-collision pier designed with polyethylene foam filled inside the square outer shell cylinder and the nine-square thin-walled tube to effectively absorb and dissipate the impact force when it is hit. This dual energy-absorbing design can not only effectively prevent the out-of-control car from being displaced too much during the collision, but also dissipate energy during the collision, further reducing potential damage.

[0014] 2. The square outer shell cylinder, sealing end panel, mounting end plate and nine-square thin-walled tube in the utility model are made of 16008 series aluminum alloy material, which has excellent mechanical properties and corrosion resistance, and can ensure that the pier can maintain stable performance in harsh environments.

[0015] 3. The utility model adopts polyethylene foam material with good processing performance, easy molding, convenient construction, and not susceptible to corrosion. These characteristics make the square bamboo energy-absorbing anti-collision pier more convenient and reliable in practical applications.

[0016] 4. The utility model realizes efficient energy absorption and dissipation, excellent protection performance, optimized structural design, good construction and processability, and broad application prospects through unique structural design and material selection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the grid bamboo energy-absorbing anti-collision pier in the utility model;

[0018] Figure 2 It is a structural diagram of the square grid bamboo energy dissipation anti-collision pier in the utility model;

[0019] Figure 3 This is a structural diagram of the nine-square thin-walled tube in the utility model;

[0020] Figure 4 It is a structural diagram of the energy-consuming material in the utility model;

[0021] Figure 5 It is an assembly diagram of the grid bamboo energy-absorbing anti-collision pier in the utility model;

[0022] Figure 6 This is a reference diagram for installing the square grid bamboo energy-absorbing anti-collision pier on the guardrail in the utility model;

[0023] Figure 7 This is a reference diagram for installing the square grid bamboo energy-absorbing anti-collision pier on the bridge pier in the utility model.

[0024] In the figure: the square outer shell cylinder is 1, the sealing end panel is 2, the mounting end panel is 3, the nine-square thin-walled tube is 4, the square thin-walled tube is 5, the bamboo block is 6, the polyethylene foam is 7, the energy-consuming material is 8, and the through hole is 9. DETAILED DESCRIPTION

[0025] In order to further illustrate the technical solution of the utility model, the following Figures 1 to 7 , we further illustrate the utility model through the optimal embodiment according to the design scheme and theoretical calculation.

[0026] As attached Figures 1 to 5 As shown, a square bamboo energy-absorbing crash pier filled with polyethylene foam includes a square outer shell cylinder 1, and a sealing end panel 2 and a mounting end panel 3 are respectively arranged at the two ends of the square outer shell cylinder 1. A nine-square thin-walled tube 4 is arranged in the cavity surrounded by the three. The nine-square thin-walled tube 4 is composed of nine square thin-walled tubes 5 arranged in an array. Each square thin-walled tube 5 is made of a hollow aluminum alloy plate and is provided with bamboo blocks 6 on the peripheral side walls around it. There are multiple groups of bamboo blocks 6 evenly distributed along the axial direction. The nine-square thin-walled tube 4 and the square outer shell cylinder 1 and between two adjacent square thin-walled tubes 5 are connected by bamboo blocks 6. Polyethylene foam 7 is filled in each square thin-walled tube 5. A plurality of energy-absorbing materials 8 are arranged between the nine-square thin-walled tube 4 and the square outer shell cylinder 1, and a through hole 9 is arranged on each of the energy-absorbing materials 8 corresponding to the square thin-walled tube 5. The polyethylene foam 7 filled inside and the nine-grid-shaped thin-walled tube 4 together play an energy-dissipating role after being hit, further absorbing the impact force.

[0027] In this embodiment, we take the following manufacturing dimensions as an example. Of course, this embodiment is not the only implementation method. The cross-sectional dimensions of the square outer shell cylinder 1 are: length 0.5m, width 0.5m, plate thickness 0.0175m; the cross-sectional dimensions of the square thin-walled tube 5 are: length 0.14m, width 0.14m, plate thickness 0.01m; the dimensions of the bamboo block 6 are: width 0.0075m, thickness 0.020m. The square outer shell cylinder 1, the sealing end panel 2, the mounting end panel 3 and the nine-square thin-walled tube 4 are preferably made of 16008 aluminum alloy.

[0028] As attached Figure 6 and 7 As shown, the following are two common installation methods for guardrails and bridge piers. The present invention selects polyethylene foam aluminum material with low density, and then dissipates energy by placing it inside a nine-square thin-walled tube. The polyethylene foam material uses an aluminum alloy tube as a matrix to form a multifunctional lightweight material with a large number of holes, which can have a good energy absorption effect. The two work together to double the energy dissipation effect. The anti-collision guardrail designed by the present invention can effectively attenuate the impact energy when the vehicle loses control, avoid continuous collision accidents, and reduce casualties.

[0029] It should be further explained that the energy dissipation material 8 is either open-cell foamed aluminum or foamed steel slag.

[0030] According to the above preferred embodiment, the solid multi-cellular energy absorbing structure filled with energy absorbing material is mainly composed of the outermost square outer shell cylinder 1, the nine-square thin-walled tube 4 and the polyethylene foam 7 to absorb energy. The square outer shell cylinder 1 and the nine-square thin-walled tube 4 are preferably made of thin-walled aluminum alloy tubes.

[0031] Therefore, the total energy absorption of the square bamboo energy-absorbing anti-collision pier component is: ;

[0032] in, W 1 The energy consumed by the outermost square shell cylinder and the inner nine-square thin-walled tube assembly. W 2 The energy consumed by the polyethylene foam filled inside.

[0033] For this component, the energy absorbed by the outermost square shell cylinder and the inner nine-square grid thin-walled tube is: ;

[0034] In the formula, F m is the average compression force of the thin-walled aluminum alloy tube, δ is the length of the thin-walled aluminum alloy tube that is compressed and displaced.

[0035] The average compression force of all thin-walled aluminum alloy tube assemblies is: ; In the formula, t is the thickness of the thin-walled aluminum alloy tube wall, b is the width of the thin-walled aluminum alloy wall;

[0036] In the above formula σ 0 It can be calculated by the following formula: ; In the formula, σ y is the yield stress of thin-walled aluminum alloy, σu is the ultimate stress of thin-walled aluminum alloy;

[0037] The energy absorbed by the polyethylene foam added inside is: ; In the formula, ε d is the compaction strain, ε For any strain, σ(ε) is the strain corresponding to the stress; ; In the formula, ρ is the density of the foam material, ρ s The density of the basic material used to make foam.

[0038] Therefore, the total energy absorption of a solid multi-cellular energy absorbing structure filled with energy absorbing material is: .

[0039] In summary, according to the specific energy absorption formula, a qualitative conclusion can be drawn: under the same conditions, the thicker the wall thickness of the cross section, the better the energy absorption effect; under the same conditions, the more cells forming the bamboo pier, the better the energy absorption effect.

[0040] The above shows and describes the main features and advantages of the utility model. For those skilled in the art, it is obvious that the specific implementation of the utility model is not limited to the details of the above exemplary embodiments, and the creative ideas and design ideas of the utility model can be realized in other specific forms without departing from the spirit or basic features of the utility model, which should be equivalent to the protection scope disclosed in the technical solution of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims in the utility model.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A square bamboo energy-absorbing crash pier filled with polyethylene foam, comprising a square outer shell cylinder (1), characterized in that: A sealing end panel (2) and a mounting end panel (3) are respectively arranged at two ends of the square outer shell cylinder (1), and a nine-square grid thin-walled tube (4) is arranged in a cavity enclosed by the three. The nine-square grid thin-walled tube (4) is composed of nine square thin-walled tubes (5) arranged in an array, and bamboo blocks (6) are arranged on the peripheral side walls of each square thin-walled tube (5), and multiple groups of bamboo blocks (6) are evenly distributed along the axial direction. The nine-square grid thin-walled tube (4) and the square outer shell cylinder (1) and two adjacent square thin-walled tubes (5) are connected by bamboo blocks (6), and each square thin-walled tube (5) is filled with polyethylene foam (7).

2. The square bamboo energy-absorbing crash pier filled with polyethylene foam according to claim 1, characterized in that: A plurality of energy-absorbing materials (8) are arranged between the nine-square grid thin-walled tube (4) and the square outer shell cylinder (1), and a through hole (9) is arranged on each of the energy-absorbing materials (8) corresponding to the square thin-walled tube (5).

3. The square bamboo energy-absorbing crash pier filled with polyethylene foam according to claim 2, characterized in that: The energy dissipation material (8) is any one of open-cell foamed aluminum and foamed steel slag.

4. The square bamboo energy-absorbing crash pier filled with polyethylene foam according to any one of claims 1 to 3, characterized in that: The square thin-walled tube (5) is made of a hollow aluminum alloy plate.

5. The square bamboo energy-absorbing crash pier filled with polyethylene foam according to claim 4, characterized in that: The cross-sectional dimensions of the square outer shell cylinder (1) are: length 0.5 m, width 0.5 m, and plate thickness 0.0175 m.

6. The square bamboo energy-absorbing crash pier filled with polyethylene foam according to claim 5, characterized in that: The cross-sectional dimensions of the square thin-walled tube (5) are: length 0.14 m, width 0.14 m, and plate thickness 0.01 m.

7. The square bamboo energy-absorbing crash pier filled with polyethylene foam according to claim 6, characterized in that: The dimensions of the bamboo block (6) are: width 0.0075 m, thickness 0.020 m.

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