Bridge anti-collision device based on building solid waste

Abstract

The utility model discloses a bridge anti-collision device based on building solid waste. The bridge anti-collision device comprises regenerated buffering materials and an FRP shell. The regenerated buffer material is poured around the pier, and the FRP shell is installed on the outer side of the regenerated buffer material in a bolting or riveting mode to form a composite anti-collision structure. A layer of regenerated buffer material is arranged outside the composite anti-collision structure, and the FRP shell is mounted outside the regenerated buffer material, so that a double-layer composite anti-collision structure is formed; a plurality of FRP shell units are spliced and combined together to form an annular closed structure, the annular closed structure is connected to the periphery of a pier in a bolting or riveting mode, a regenerative buffering material is poured into an inner cavity, and a unitized anti-collision structure is formed. According to the utility model, the anti-collision performance of the bridge is improved, the construction waste is recycled, and the device has the advantages of light weight, good energy absorption effect, low manufacturing cost, convenience in installation and construction and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of resource utilization of construction waste and road traffic facilities, and more specifically, to a bridge anti-collision device based on construction solid waste, which is suitable for bridge protection in service environments with high vehicle speeds such as vehicles / ships. Background Art

[0002] Vehicles and ships colliding with bridges can cause casualties, damage to bridges, traffic interruptions and other negative social and economic impacts. With the increase in the number of bridges, the problem of vehicle-bridge and ship-bridge collisions has gradually become prominent. When a vehicle collides with a bridge, the speed is relatively high, and the collision area is mainly at the first contact position, which is easy to cause local damage to the bridge. At present, there are few studies on bridge anti-collision devices in China, and there are no relevant specifications. Setting an independent anti-collision device on the bridge so that the vehicle does not directly collide with the bridge, but collides with the anti-collision device first, is a feasible method to protect the bridge. At the same time, most of the anti-ship collision structural materials of bridges in my country currently use steel, concrete or elastomer as buffering energy-absorbing materials, but these energy-absorbing and energy-consuming materials are mostly relatively simple, and the price is high, the energy absorption effect is limited, and it is difficult to replace and repair. The regenerated buffer material described in the present invention has the characteristics of low density, high porosity, good energy absorption and shock absorption effect, good economy, etc., and has a broad application prospect in the field of vehicle-bridge and ship-bridge anti-collision. Combining the FRP shell with the regenerated buffer material can effectively achieve the buffering effect of out-of-control vehicles and ships. Summary of the invention

[0003] In response to the existing vehicle-bridge and ship-bridge collision problems, the present invention provides a bridge anti-collision device based on construction solid waste. Compared with traditional concrete anti-collision structures, it has the advantages of light weight, good guidance, low cost, easy installation, construction and replacement, etc., and at the same time solves the problem of difficulty in recycling construction waste.

[0004] The technical solution adopted by the present invention is: a bridge anti-collision device based on construction solid waste, including recycled buffer material and FRP shell;

[0005] The bridge anti-collision device is arranged on the side of the bridge deck to form an anti-car collision device:

[0006] The regenerated buffer material is cast on the side of the bridge deck, and the FRP shell is installed on the outside of the regenerated buffer material by bolting or riveting to form a composite anti-collision structure;

[0007] The bridge anti-collision device is arranged around the bridge pier to form an anti-ship collision device:

[0008] The recycled buffer material is poured around the bridge pier, and the FRP shell is installed on the outside of the recycled buffer material by bolting or riveting to form a composite anti-collision structure;

[0009] A layer of recycled buffer material is arranged outside the composite anti-collision structure, and an FRP shell is installed outside the recycled buffer material to form a double-layer composite anti-collision structure;

[0010] The bridge anti-collision device is composed of multiple FRP shell units, which are spliced ​​and combined together to form an annular closed structure. The annular closed structure is bolted or riveted to the surrounding of the bridge pier. A cavity is provided in the FRP shell unit, and recycled buffer material is cast inside the cavity to form a unitized anti-collision structure.

[0011] Preferably, the FRP shell is a prefabricated component with a circular or square shape. Bolt holes may be reserved on the surface of the FRP shell so that the shell is fixed to the bridge by bolting or riveting.

[0012] Preferably, the regenerated buffer material is poured into a double-layer composite anti-collision structure or a unitized anti-collision structure according to density levels.

[0013] Preferably, the regenerated sand in the regenerated buffer material is crushed from any one of abandoned concrete blocks, mortar blocks, bricks and tiles, stones, and glass, and the particle size of the crushed regenerated sand is no more than 4.5 mm. Abandoned concrete blocks are preferred because they are widely available and easy to obtain.

[0014] The regenerated buffer material is formed by cement, water, fiber, foam and regenerated sand formed by crushing construction solid waste. The regenerated buffer material can be cast and formed separately, can be filled inside the FRP shell, or can be filled in the cavity of the FRP shell in multiple density levels to form a layered composite structure. The regenerated buffer material includes the following components, calculated by weight percentage: 100 parts of regenerated sand, 60-120 parts of cement, 50-90 parts of water, 0.5-3 parts of foaming agent, 0.5-5 parts of water reducer, 1-5 parts of accelerator, and 0.5-3 parts of fiber. The fiber can be one of glass fiber, aramid fiber, basalt fiber, and polypropylene fiber, with polypropylene fiber being preferred; the amount of regenerated sand is 20-50% of the total mass, with 40% being preferred. The porosity of closed cells in the cavity of the regenerated buffer material is between 60% and 80%, with 70% being preferred. And the pore size of the closed pores should not exceed 1.5mm.

[0015] The FRP shell is a prefabricated component, formed by pultrusion or winding process, and winding process is preferred. The FRP shell can form one or more cavities, and the cavities can be filled with recycled buffer materials to form a composite structure to improve the energy absorption effect of the anti-collision device.

[0016] The working principle of the present invention is as follows:

[0017] The present invention utilizes the high strain rate correlation of the composite structure, the low resistance and plasticity of the FRP shell, and the microscopic deformation characteristics of the regenerated buffer material to give full play to its buffering and energy absorption function, effectively reduce the damage to personnel under impact, and protect the bridge at the same time.

[0018] The anti-collision device is a composite of FRP and recycled buffer materials. When a collision occurs, the vehicle / ship first interacts with the FRP shell. Due to the low resistance of FRP, the impact time of the vehicle is prolonged. In this process, most of the vehicle's kinetic energy is transferred to the regenerated buffer material in the cavity through the plastic deformation of the FRP shell. The regenerated buffer material quickly responds microscopically under high-speed impact loads, such as deformations such as compression, collapse and rupture of pores, as well as displacement, embedding and friction of regenerated sand, and finally converts the incoming energy into material internal energy. The composite structure formed by the FRP shell and recycled buffer materials of multiple density levels absorbs energy step by step, so that the anti-collision device achieves a good buffering effect. If a separately cast recycled buffer material is used, a good energy absorption and buffering effect can also be achieved through the crushing deformation of the recycled buffer material.

[0019] Beneficial effects:

[0020] 1. The regenerated buffer material of the present invention is prepared from construction solid waste as raw materials, thus realizing the recycling of construction solid waste and having significant environmental and economic benefits.

[0021] 2. The regenerated buffer material described in the present invention is a regenerated material with the characteristics of low strength, low density and high porosity. It absorbs collision energy by triggering changes and responses in its material microstructure during collision and has good buffering and energy-absorbing properties.

[0022] 3. The regenerated buffer material of the present invention has the advantages of being cast-in-place, good durability, convenient construction, and low cost. In addition, the density of the regenerated buffer material is only 300-800kg / m 3 , it has significant lightweight features and can significantly reduce the load on the anti-collision device.

[0023] 4. In the present invention, the recycled buffer material and the FRP shell form a composite structure, which greatly improves the buffering performance of the device, reduces the damage to the bridge after the collision of vehicles or ships, and ensures the safety of drivers and passengers.

[0024] 5. The present invention uses prefabricated FRP shell units, which are easy to transport and splice. The spliced ​​FRP and the bridge are fixed by bolting or riveting, which is reliable and convenient to construct, and can greatly reduce transportation and installation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the utility model of regenerated buffer material being poured separately on the bridge pier and the bridge deck;

[0026] Figure 2 This is a schematic diagram of a vehicle collision prevention device formed by the regenerated buffer material of the utility model;

[0027] Figure 3 This is a schematic diagram of a composite bridge anti-vehicle collision device composed of recycled buffer material and square FRP shell of the utility model;

[0028] Figure 4 This is a schematic diagram of a ship collision prevention device composed of recycled buffer materials of the utility model;

[0029] Figure 5 This is a schematic diagram of the utility model wherein the recycled buffer material is filled inside a circular FRP shell to form an anti-ship collision device;

[0030] Figure 6 This is a schematic diagram of the utility model wherein the recycled buffer material is filled into multiple cavities of a circular FRP shell to form an anti-ship collision device;

[0031] Figure 7 It is a schematic diagram of the FRP shell unit of the unitized anti-collision structure of the utility model;

[0032] Figure 8 It is a schematic diagram of the FRP shell units of the unitized anti-collision structure of the utility model being connected into a closed structure;

[0033] Fig. 9 It is an overall schematic diagram of the unitized anti-collision structure of the utility model. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0035] The preparation process of the regenerated buffer material of the utility model is as follows: fine and uniform foam is produced by a foaming machine, mixed with fiber, regenerated sand, water and cement mixture according to the construction mix ratio and sent to a concrete mixer for mixing to prepare the regenerated buffer material. The construction mix ratio is calculated by weight percentage: 100 parts of regenerated sand, 60-120 parts of cement, 50-90 parts of water, 0.5-3 parts of foaming agent, and 0.5-3 parts of fiber. Among them, the regenerated sand is any one or a mixture of several of the discarded concrete blocks, mortar blocks, bricks and tiles, stones, and glass, and the particles with a particle size of no more than 4.5 mm after crushing and screening are taken.

[0036] like Figure 1 As shown, the bridge surface should be sanded before pouring to make the bridge surface as flat and smooth as possible, and the dust and rust removal should be carried out. The recycled buffer material is poured on the bridge deck 10 and the bridge pier 8 respectively. After maintenance, the mold can be removed to form the anti-car collision device 7 and the anti-ship collision device 9.

[0037] like Figure 2As shown, after the bridge deck is poured with recycled buffer material and maintained, the anti-collision device 7 can effectively control the movement trajectory of the out-of-control vehicle.

[0038] like Figure 3 As shown, the FRP shell 11 is a prefabricated component with bolt holes 12 reserved on the surface. After the recycled buffer material is poured, the FRP shell 11 can be installed on the outside of the recycled buffer material by bolting or riveting to form a composite anti-collision structure. Figure 2 The anti-collision device shown can more effectively control an out-of-control vehicle.

[0039] like Figure 4 As shown, the regenerated buffer material is poured around the bridge pier 8, and after solidification and hardening, the mold can be removed to form the anti-ship collision device. When a ship-bridge collision occurs, the bow of the ship collides with the device of the utility model, and triggers the microstructure change and response of the regenerated buffer material, giving full play to its buffering and energy absorption effect, effectively reducing the speed and acceleration of the ship during the collision, and effectively reducing the damage to the bow of the ship.

[0040] like Figure 5 As shown, a 2 mm thick FRP shell 11 prefabricated in the factory is installed at the construction site, and the cavity between the bridge pier and the FRP shell 11 is filled with recycled buffer material. When a ship-bridge collision occurs, the FRP shell and the recycled buffer material work at the same time, and the collision load is transmitted to the internal recycled buffer material through the deformation of the FRP shell, so that the gap of the recycled buffer material is crushed and deformed, which can better improve the collision prevention effect of the anti-collision system.

[0041] like Figure 6 As shown in the figure, two layers of 2mm thick FRP shell prefabricated in the factory were installed on the construction site, and recycled cushioning materials were used at 300-500kg / m 3 and 600-800kg / m 3 The two density levels respectively fill the cavities 12 and 13 between the pier 8 and the FRP shell as a whole, which can increase the thickness of the regenerative buffer energy-absorbing material and the pore compression space, and greatly exert the energy absorption characteristics of the regenerative buffer material. When a ship-bridge collision occurs, the FRP shell transfers the collision load to the internal regenerative buffer material through flexible deformation, and the pores of the regenerative buffer material are crushed and deformed, so as to better achieve the anti-collision effect of the anti-collision system.

[0042] like Figure 7-9 As shown, the anti-collision device adopts FRP shell unit design. In an environment that is not convenient for construction or when the construction time is tight, a prefabricated FRP shell unit can be used. Bolt holes 16 are reserved inside the prefabricated FRP shell unit. The density of the two cavities 14 and 15 of the prefabricated FRP shell unit is 300-500kg / m 3Recycled cushioning material and 600-800kg / m 3 Recycled buffer material. Four prefabricated FRP shell units are assembled into a closed structure at the construction site. The FRP shell units are fixed to the bridge by bolting or riveting using bolt holes 16 to form full protection with the best anti-collision effect. Alternatively, 1-3 FRP shell units can be used for partial protection according to the actual situation. After being hit by a ship, the damage degree of this anti-collision device is visualized, and replacement and maintenance are convenient. Minor damage is manifested as deformation of the FRP shell, which does not require maintenance or only requires replacement of the collision panel. Severe damage is manifested as deformation, crushing, and destruction of the FRP shell and the buffer material in the cavity. At this time, only the damaged unit needs to be replaced.

[0043] The above is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For ordinary technicians in this field, within the scope of the principles and technical ideas of the present invention, various changes, modifications, substitutions and deformations of these embodiments still fall within the protection scope of the present invention.

Claims

1. A bridge anti-collision device based on construction solid waste, characterized by: Includes recycled cushioning material and FRP shell; The bridge anti-collision device is arranged on the side of the bridge deck to form an anti-car collision device: The regenerated buffer material is cast on the side of the bridge deck, and the FRP shell is installed on the outside of the regenerated buffer material by bolting or riveting to form a composite anti-collision structure; The bridge anti-collision device is arranged around the bridge pier to form an anti-ship collision device: The recycled buffer material is poured around the bridge pier, and the FRP shell is installed on the outside of the recycled buffer material by bolting or riveting to form a composite anti-collision structure; A layer of recycled buffer material is arranged outside the composite anti-collision structure, and an FRP shell is installed outside the recycled buffer material to form a double-layer composite anti-collision structure; The bridge anti-collision device is composed of multiple FRP shell units, which are spliced ​​and combined together to form an annular closed structure. The annular closed structure is bolted or riveted to the surrounding of the bridge pier. A cavity is provided in the FRP shell unit, and recycled buffer material is cast inside the cavity to form a unitized anti-collision structure.

2. The bridge anti-collision device based on construction solid waste according to claim 1 is characterized by: The FRP shell is a prefabricated component with a circular or square shape. Bolt holes are reserved on the surface of the FRP shell and the FRP shell is fixed to the bridge by bolting or riveting.

3. The bridge anti-collision device based on construction solid waste according to claim 1 is characterized by: The regenerated buffer material is poured into the double-layer composite anti-collision structure or the unitized anti-collision structure according to density levels.

4. The bridge anti-collision device based on construction solid waste according to claim 1 is characterized by: The regenerated sand in the regenerated buffer material is crushed from any one of the construction wastes such as discarded concrete blocks, mortar blocks, bricks and tiles, stones and glass.

5. The bridge anti-collision device based on construction solid waste according to claim 4 is characterized by: The particle size of the regenerated sand is not greater than 4.5 mm.

6. The bridge anti-collision device based on construction solid waste according to claim 4 is characterized by: The regenerated sand is waste concrete blocks.

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