Deformation-recoverable anti-collision device for main cable of suspension bridge

Abstract

The utility model discloses a deformation-recoverable suspension bridge main cable anti-collision device which is embraced on a main cable in a pile casing form within a collapse stone collision range, and is specifically characterized in that a hoop is embraced on the main cable and is fixed through an M12 bolt, the hoop is welded with an inner connecting plate of a plurality of composite hyperelastic buffer bodies, and the composite hyperelastic buffer bodies are connected with the pile casing. The outer connecting plate of the composite hyperelastic buffer body is fixed with the casing shell through an M12 bolt, and the casing shell is secondarily connected through a flange; the composite hyperelastic buffer body is made into an arc-shaped inner connecting plate and an arc-shaped outer connecting plate by two square steel plates, and a cylindrical composite elastic buffer column is poured between the inner connecting plate and the outer connecting plate. The device has the advantages of being high in energy absorption rate, recoverable in deformation, reusable in low energy, recoverable in local deformation, low in maintenance cost and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of structural engineering protection, and in particular relates to a deformation-restorable main cable anti-collision device for a suspension bridge. Background Art

[0002] With the development of the market economy, the renovation and expansion of transportation projects are increasing, especially the construction of large-span bridges in mountainous areas, which are often dominated by suspension bridges. In addition, in recent years, landslides and rockfalls have occurred in mountainous areas, resulting in an increased probability of rockfalls hitting the main cables of suspension bridges. Considering that the main cable is prone to local damage and even partial breakage of parallel steel wire bundles after being hit by rockfalls, the bearing capacity of the main cable is reduced, which makes the suspension bridge structure subject to great safety hazards. Even the main cable may break due to local damage to the cross section and increase in local stress, which will cause serious traffic accidents and cause major casualties and direct economic losses. Therefore, it will become increasingly important to improve the impact resistance of the main cable of the suspension bridge.

[0003] At present, there are no national, industry or local standards to guide the protection of the main cables of suspension bridges, nor are there relevant protection methods and protective devices. Therefore, it is necessary to set up a main cable anti-collision device that is easy to install and maintain, has good protection performance, high reliability and economical cost. Utility Model Content

[0004] Aiming at the collision problem of the main cable of a suspension bridge, the utility model provides a main cable anti-collision device of a suspension bridge with recoverable deformation.

[0005] The utility model discloses a deformation-restorable anti-collision device for the main cable of a suspension bridge, which is wrapped around the main cable in the form of a casing within the impact range of rockfall, and is specifically:

[0006] The clamp is clamped on the main cable and fixed by M12 bolts. The clamp is welded to the inner connecting plates of several composite superelastic buffers. The outer connecting plates of the composite superelastic buffers and the casing shell are fixed by M12 bolts. The casing shell is connected for the second time by a flange.

[0007] The composite superelastic buffer body is made of two square steel plates into an arc-shaped inner connecting plate and an outer connecting plate, and a cylindrical composite elastic buffer column is cast between the inner connecting plate and the outer connecting plate.

[0008] Furthermore, the interior of the composite elastic buffer column is a plastic energy-absorbing material, and the plastic energy-absorbing material is composed of perlite, glass fiber and water glass, which are stirred and solidified into a designed shape in a mass ratio of 1:0.5:3, and are sealed by a modified polyurethane material to form a cylinder.

[0009] Furthermore, a stiffening plate is provided at the location where the clamp is fixed by M12 bolts.

[0010] Furthermore, the casing shell is made of a lightweight fiber composite material; at the casing shell connection, the casing shell is clamped by angle steel and flat steel and fixed with M8 bolts; adjacent angle steels are fixed with M12 bolts.

[0011] Furthermore, the thickness of the lightweight fiber composite material is 10 mm; a composite steel mesh or a composite "well" groove steel structure can be composited inside the casing shell according to needs.

[0012] Furthermore, the inner connecting plate and the outer connecting plate are 5-10 mm thick, and the size of the composite elastic buffer column and the proportion of the plastic energy-absorbing material can be adaptively adjusted.

[0013] Furthermore, the casing structure is composed of 1-meter unit segments.

[0014] The beneficial technical effects of the utility model are:

[0015] 1. The composite superelastic buffer of the utility model can be reused without damage within the designed impact energy; after the composite superelastic buffer is deformed by 50% in tension and compression and 50% in shear, the modified polyurethane part of the composite superelastic buffer does not crack or break, and can be used repeatedly, the internal plastic energy-consuming material does not leak, and under the impact load, the one cubic material can withstand 1000kJ energy impact without damage.

[0016] 2. The utility model can adapt to different protection energy level requirements; for working conditions of different energy levels, different types and numbers of composite superelastic buffers are selected to meet the protection requirements.

[0017] 3. The utility model can provide a longer impact displacement and prolong the time of the impact effect; after the composite superelastic buffer body is impacted, it buffers through its own large deformation, prolongs the impact time and reduces the impact force.

[0018] 4. The utility model has low overall cost and is easy to install and maintain. The anti-collision casing structure is composed of 1-meter unit segments. When the anti-collision device is partially damaged, only the damaged part needs to be replaced without replacing the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional view of the casing of the main cable anti-collision device of the utility model.

[0020] Figure 2 This is a cross-sectional view of the casing II of the main cable anti-collision device of the utility model.

[0021] Figure 3 This is the connection diagram of the clamp flange of the utility model.

[0022] Figure 4 This is the flange connection diagram of the casing shell of the utility model.

[0023] Figure 5 It is the front and side view of the composite superelastic buffer body of the utility model.

[0024] Figure 6 This is a cross-sectional view of the composite superelastic buffer body of the utility model.

[0025] In the figure: 1-casing shell; 2-hoop; 3-composite superelastic buffer; 4-M12 bolt; 5-stiffening plate; 6-angle steel; 7-flat steel; 8-M8 bolt; 31-external connecting plate; 32-composite elastic buffer column; 33-inner connecting plate; 34-modified polyurethane material; 35-plastic energy dissipation material. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] The utility model discloses a deformation-restorable anti-collision device for main cable of suspension bridge, which is wrapped around the main cable in the form of a casing within the impact range of rockfall. Figure 1 As shown, specifically:

[0028] like Figure 2 As shown, the clamp 2 is clasped on the main cable and fixed by M12 bolts 4, the clamp 2 is welded to the inner connecting plates 33 of several composite superelastic buffers 3, the outer connecting plates 31 of the composite superelastic buffers 3 and the casing shell 1 are fixed by M12 bolts 4, and the casing shell 1 is connected for a second time by a flange.

[0029] like Figure 5 As shown, the composite superelastic buffer body 3 is made of two square steel plates into an arc-shaped inner connecting plate 33 and an outer connecting plate 31 , and a cylindrical composite elastic buffer column 32 is cast between the inner connecting plate 33 and the outer connecting plate 31 .

[0030] Further, such as Figure 6 As shown, the interior of the composite elastic buffer column 32 is a plastic energy dissipation material 35, which is composed of perlite, glass fiber and water glass, which are stirred and solidified into a designed shape in a mass ratio of 1:0.5:3, and are sealed by a modified polyurethane material 34 to form a cylinder.

[0031] Further, such as Figure 3 As shown, a stiffening plate 5 is provided at the location where the clamp 2 is fixed by the M12 bolt 4.

[0032] Furthermore, the casing shell 1 is made of a lightweight fiber composite material. Figure 4 As shown, at the connection of the casing shell 1, the casing shell 1 is clamped by angle steel 6 and flat steel 7 and fixed with M8 bolts 8; adjacent angle steels 6 are fixed with M12 bolts 4.

[0033] Furthermore, the thickness of the lightweight fiber composite material is 10 mm. In order to increase the rigidity and penetration resistance of the anti-collision plate, it is determined through force calculation whether to add a composite reinforcement structure inside the anti-collision plate. If necessary, a composite steel mesh or a composite "well" groove steel structure is added inside the casing shell 1.

[0034] Furthermore, the inner connecting plate 33 and the outer connecting plate 31 are 5-10 mm thick, and the size of the composite elastic buffer column 32 and the proportion of the plastic energy-absorbing material 35 can be adaptively adjusted according to the energy level.

[0035] Furthermore, the casing structure is composed of 1-meter unit segments.

[0036] Installation process of this utility model:

[0037] 1 The device is assembled in the workshop according to the drawing, the hoop 2 is welded to the inner connecting plate 33 of the composite superelastic buffer body 3, and the outer connecting plate 31 of the composite superelastic buffer body 3 is bolted to the lightweight composite fiberboard.

[0038] 2. Clamp the one-meter segment device onto the main cable, bolt the clamp 2 securely, and then bolt the flange at the lightweight composite fiber shell.

[0039] 3 Follow the above steps and install them in the main cable protection area.

[0040] When a collision occurs, the impact force is dispersed to each composite superelastic buffer body 3 through the anti-collision plate. The composite superelastic buffer body 3 transmits the weakened impact force to the main cable through buffering deformation and extrusion energy dissipation of the internal plastic energy dissipation material 35.

[0041] The utility model adjusts different protection energy levels by adjusting the size of the superelastic buffer body. It has the characteristics of high energy absorption rate, recoverable deformation, repeated use with low energy (recoverable deformation), recoverable local deformation, low maintenance cost, etc. It is a cost-effective and generally applicable utility model protection measure for various similar protection projects.

Claims

1. A deformation-recoverable suspension bridge main cable anti-collision device, characterized in that: Within the rockfall impact range, the casing is clasped on the main cable, specifically: The clamp (2) is clamped on the main cable and fixed by M12 bolts (4); the clamp (2) is welded to the inner connecting plates (33) of a plurality of composite superelastic buffer bodies (3); the outer connecting plates (31) of the composite superelastic buffer bodies (3) and the casing shell (1) are fixed by M12 bolts (4); and the casing shell (1) is connected for a second time by a flange; The composite superelastic buffer body (3) is made of two square steel plates into an arc-shaped inner connecting plate (33) and an outer connecting plate (31), and a cylindrical composite elastic buffer column (32) is cast between the inner connecting plate (33) and the outer connecting plate (31).

2. The deformation-recoverable suspension bridge main cable anti-collision device according to claim 1 is characterized in that: The composite elastic buffer column (32) has a plastic energy dissipation material (35) inside. The plastic energy dissipation material (35) is composed of perlite, glass fiber and water glass. The plastic energy dissipation material (35) is stirred and solidified in a mass ratio of 1:0.5:3 to form a designed shape, and is sealed by a modified polyurethane material (34) to form a cylinder.

3. The deformation-recoverable suspension bridge main cable anti-collision device according to claim 1 is characterized in that: A stiffening plate (5) is provided at the location where the clamp (2) is fixed by means of M12 bolts (4).

4. The deformation-recoverable suspension bridge main cable anti-collision device according to claim 1 is characterized in that: The casing shell (1) is made of a lightweight fiber composite material; at the connection of the casing shell (1), the casing shell (1) is clamped by angle steel (6) and flat steel (7) and fixed by M8 bolts (8); adjacent angle steels (6) are fixed by M12 bolts (4).

5. The deformation-restorable suspension bridge main cable anti-collision device according to claim 4 is characterized in that: The lightweight fiber composite material has a thickness of 10 mm; a composite steel mesh or a composite "well"-shaped groove steel structure can be composited inside the casing shell (1) according to requirements.

6. The deformation-restorable suspension bridge main cable anti-collision device according to claim 1 is characterized in that: The inner connecting plate (33) and the outer connecting plate (31) are 5-10 mm thick, and the size of the composite elastic buffer column (32) and the proportion of the plastic energy-absorbing material (35) can be adaptively adjusted.

7. The deformation-restorable suspension bridge main cable anti-collision device according to claim 1 is characterized in that: The casing structure is composed of 1-meter unit segments.

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