CN106812091A - A kind of form adaptive pier anti-collision device - Google Patents

Abstract

The invention belongs to the field of safety protection devices in bridge engineering construction, and specifically relates to a shape-adaptive bridge pier anti-collision device, which includes several identical flexible anti-collision units and steel cables, and each flexible anti-collision unit is arranged in the middle There is a rigid shaft penetrating up and down, and the steel cables pass through the openings at the upper and lower ends of the rigid shaft, and several flexible anti-collision units are sequentially strung up and wrapped around the pier through steel cables to form the main body of the anti-collision device. Each of the flexible anti-collision units is independent of each other. The shape-adaptive bridge pier anti-collision device of the present invention solves the technical problems in the prior art that the anti-collision device needs to be highly customized according to the specific conditions of the bridge, the production cycle is long, and the production cost is high. Various types of bridges of different shapes can also be standardized according to different anti-collision requirements, which has a series of advantages such as short construction period, low construction and maintenance costs.

Description

A shape-adaptive bridge pier anti-collision device

technical field

The invention belongs to the field of safety protection devices in bridge engineering construction, and in particular relates to a shape-adaptive bridge pier anti-collision device, which can effectively reduce the impact force of a vehicle colliding with a bridge pier, reduce the loss caused by the collision, and reduce replacement costs.

Background technique

With the vigorous development of my country's transportation industry, there are more and more bridges such as flyover bridges. While alleviating traffic pressure, it also brings many hidden dangers of traffic accidents. For example, it is not uncommon for high-speed cars to collide with bridge piers. . Therefore, it is very meaningful and necessary to study the vehicle collision prevention device for bridge piers.

At present, most of the domestic mainstream anti-collision devices are elastic deformation anti-collision facilities and crushing deformation anti-collision facilities. The basic principle is to absorb energy by using the deformation of the elastic material generated by the contact between the anti-collision device and the vehicle and the destruction of the steel plate and other aggregates, so as to play a buffering role to protect the bridge. A flexible attachment energy dissipation device is commonly used. The energy dissipation facility utilizes the plastic deformation and damage of the steel and the energy absorption of the filled rubber. The contact time is shortened, which reduces the peak impact force. At the same time, due to structural deformation and interaction, and the anti-collision device is not fixed and can rotate freely, the direction of the front of the car is shifted, reducing the energy exchange between the vehicle and the structure. However, the design and installation of existing anti-collision devices need to be carried out according to multiple factors such as the position of the pier itself, the shape, the traffic flow and the surrounding environmental conditions. Therefore, the bridge anti-collision devices at this stage must be customized according to the specific conditions of the corresponding bridge, and most of the devices are directly welded on the base, which brings a series of disadvantages such as high cost, high maintenance cost, and high maintenance cost. Since design and production often take a lot of time, it adds a lot of time cost invisibly. The cost of common bridge anti-collision devices is in the millions or even tens of millions. However, such a high-cost device will receive irreversible damage after an impact, which has caused great economic losses. loss of value. Therefore it is very necessary to find a kind of anti-collision device of new structural form.

Due to the above-mentioned defects and deficiencies, further perfection and improvement are urgently needed in this field, and a vehicle anti-collision device is designed so that it can withstand multiple collisions, and can effectively reduce the impact force of vehicles colliding with bridge piers, and reduce the impact caused by collisions. losses while reducing replacement costs.

Contents of the invention

Aiming at the above defects or improvement needs of the prior art, the present invention provides a shape-adaptive pier anti-collision device, which has several identical flexible anti-collision units and steel cables for fixing the flexible anti-collision units, through multiple The same flexible anti-collision unit absorbs energy, which solves the technical problems in the prior art that the anti-collision device needs to be highly customized according to the specific conditions of the bridge, the production cycle is long, and the production cost is high. The shape-adaptive bridge pier anti-collision device of the present invention can not only actively adapt to bridges of various shapes, but also realize standardized production according to different anti-collision requirements, thus having a series of advantages such as short construction period, low construction and maintenance costs, etc. advantage.

In order to achieve the above object, according to one aspect of the present invention, a shape-adaptive bridge pier anti-collision device is provided, which is characterized in that the device includes several identical flexible anti-collision units and steel for fixing the flexible anti-collision units search,

Each of the flexible anti-collision units is provided with a rigid shaft that penetrates up and down. The upper and lower ends of the rigid shaft are respectively provided with openings, and steel cables are provided at the top and bottom of the flexible anti-collision units. Cables pass through the openings at the upper and lower ends of the rigid shaft, and several flexible anti-collision units are sequentially strung up and wrapped around the pier through steel cables to form the main body of the anti-collision device. Each of the flexible anti-collision units independent of each other.

Further preferably, the flexible anti-collision unit is made of a rigid cylinder filled with energy-dissipating materials. More comparative tests have shown that the flexible anti-collision unit adopts a circular cylindrical structure with a smooth exterior, which can reduce damage to the vehicle during a collision, and the energy-dissipating material filled in the middle can absorb more energy during a collision. Energy, less damage.

Preferably, the cylinder of the flexible anti-collision unit is made of steel plate, and the energy-dissipating material filled inside is polyurethane material, glass foam, modified polypropylene, PVC foam, PMI foam, aluminum foam, polyphenylene foam, polyamide One or several kinds of imine foam. More comparative tests have shown that lightweight energy-dissipating materials such as polyurethane, due to the excellent characteristics of the material itself, reduce the mass of the entire structure and increase the in-plane bending moment of the entire structure. On the premise of ensuring the strength standard of the entire structure Next, in the event of a collision, the participation of materials in buffering and energy absorption is increased, and the rigid collision is converted into an elastic-plastic collision, which greatly improves the two-way protection ability of the entire structure for bridges and vehicles.

Preferably, buckles are provided on the steel cables on both sides of the opening of the rigid shaft of the flexible anti-collision unit, and the flexible anti-collision unit is fixed on the steel cables through the buckles. The anti-collision units are fixed by buckles, which can actively adjust the distance between each unit and actively adapt to various shapes of piers. In addition, due to the independent nature of each unit, future maintenance and repair costs are also greatly reduced.

Preferably, the buckle is an annular buckle, and the steel cable is also provided with a hole for fixing the buckle. Many comparative tests have shown that the use of ring-shaped buckles to fix the anti-collision unit on the steel cable can effectively prevent the flexible anti-collision unit from moving on the steel cable, and can prevent the buckle itself from causing wear to the steel cable, thereby Extend its service life.

Generally speaking, compared with the prior art, the above technical solution conceived by the present invention has the following advantages and beneficial effects.

(1) This device has multiple identical anti-collision units strung together, and the anti-collision units are all independent standard parts, so it can actively adapt to bridge designs of different shapes, save the process of active design, and avoid traditional anti-collision devices Aiming at the problem that each pier needs to remake the mold, the cost is low, the installation time is short, the installation process is simple, the anti-corrosion effect is good, and the maintenance cost is low.

(2) Each anti-collision unit is independent. Even after a collision, it is only necessary to replace the damaged unit to reuse it, instead of replacing it as a whole after a collision like the overall floating casing, which saves a lot economic cost. And the structure of the device itself is reasonable and simple, maintenance-free, flexible and changeable in shape, due to the independence of the anti-collision unit, it has the stability and anti-sinking performance similar to the multi-cabin of a ship, and the maintenance after damage is convenient and easy. Moreover, it can realize standardized production according to different anti-collision requirements, so it has a series of advantages such as short construction period, low construction and maintenance costs.

(3) The flexible anti-collision unit of the device of the present invention adopts a circular cylindrical structure, and its exterior is smooth, which can reduce damage to the vehicle during a collision, and the energy-dissipating material filled in the middle can absorb more energy and reduce damage.

(4) The device of the present invention uses a large amount of lightweight energy-dissipating materials such as polyurethane in the structure. Due to the excellent characteristics of the material itself, the quality of the entire structure is reduced, and the in-plane bending moment of the entire structure is increased. Under the premise of the strength standard of the entire structure, in the event of a collision, the participation of materials in buffering energy absorption is increased, and the rigid collision is converted into an elastoplastic collision, which greatly improves the two-way protection ability of the entire structure for bridges and vehicles.

(5) The device of the present invention has the advantages of simple structure, easy preparation, and low cost. It can adapt to piers of different shapes, and only the damaged units need to be replaced during replacement, which greatly reduces the cost and is suitable for large-scale promotion and use.

Description of drawings

Fig. 1 is the structural diagram of shape adaptive pier anti-collision device of the present invention;

Fig. 2 is a sectional view of the A-A interface of Fig. 1;

Fig. 3 (a) and (b) are the installation diagrams of the anti-collision device of the present invention on bridge piers of various shapes;

Throughout the drawings, the same reference numerals are used to designate the same elements or structures, wherein:

1-steel plate, 2-flexible anti-collision unit, 3-rigid shaft, 4-steel cable, 5-ring buckle, 6-pier.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

Fig. 1 is a structural diagram of the shape-adaptive pier anti-collision device of the present invention, as shown in the figure, the device includes several identical flexible anti-collision units 2 and steel cables 4 fixing the flexible anti-collision units 2,

Each of the flexible anti-collision units 2 is provided with a rigid shaft 3 that penetrates up and down. The upper and lower ends of the rigid shaft 3 are respectively provided with openings, and the top and bottom of the flexible anti-collision units 2 are provided with steel cables. 4. The steel cables 4 pass through the openings at the upper and lower ends of the rigid shaft 3, and several flexible anti-collision units 2 are sequentially strung up and wrapped around the pier 6 through the steel cables 4 to form an anti-collision device. The main body and each of the flexible anti-collision units 2 are independent of each other.

In a specific embodiment of the present invention, the flexible anti-collision unit 2 is made of a rigid cylinder 1 filled with energy-dissipating materials.

In another specific embodiment of the present invention, as shown in Figure 2, the cylinder 1 of the flexible anti-collision unit 2 is made of steel plate, and the energy dissipation material filled inside is polyurethane material, glass foam, modified polypropylene , PVC foam, PMI foam, aluminum foam, polyphenylene foam, polyimide foam or one or more of them.

In another specific embodiment of the present invention, buckles 5 are provided on the steel cables 4 on both sides of the opening of the rigid shaft 3 of the flexible anti-collision unit 2, and the flexible anti-collision unit 2 is fixed by the buckles 5. On tightrope 4.

In another specific embodiment of the present invention, the buckle 5 is an annular buckle 5 , and the steel cable 4 is also provided with a hole for fixing the buckle 5 .

For explaining the present invention better, a specific embodiment is provided below:

With reference to accompanying drawing 1 (structural diagram), a kind of shape self-adaptive bridge pier anti-collision device, it comprises the sleeve shape flexible anti-collision unit 2 that surrounds a plurality of polyurethane fillings around the pier 6, each flexible anti-collision unit is enclosed within On a high-strength rigid shaft 3, the opening at the end of the rigid shaft 3 is passed through by the steel cable 4, the flexible anti-collision unit 2 is fixed on the steel cable 4 through the rigid shaft 3, and rings are installed at both ends of the rigid shaft 3. Buckle 5 fixes the position. The cylinder 1 on the outer surface of the flexible anti-collision unit 2 is made of high-strength steel plate, and the inside is filled with polyurethane material.

Specifically, due to the excellent properties of the material used in the flexible anti-collision unit 2, the weight of the whole device is greatly reduced compared with the traditional device and the energy absorption effect is excellent. Each anti-collision unit is independent of each other, and is fixed on the steel cable through a ring buckle, which can actively adjust the distance between each unit and perfectly adapt to various shapes of piers. In addition, due to the independent nature of each unit, future maintenance and repair costs are also greatly reduced.

Those skilled in the art can easily understand that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention, All should be included within the protection scope of the present invention.

Claims (5)

1. A shape adaptive pier anti-collision device is characterized in that the device comprises several identical flexible anti-collision units (2) and the steel cables (4) fixing said flexible anti-collision units (2), Each of the flexible anti-collision units (2) is provided with a rigid shaft (3) that penetrates up and down, and the upper and lower ends of the rigid shaft (3) are respectively provided with openings. Steel cables (4) are provided on the top and the bottom, and the steel cables (4) pass through the openings at the upper and lower ends of the rigid shaft (3), passing several flexible anti-collision units (2) through the steel cables ( 4) Sequentially stringing and covering the periphery of the pier (6) to form the main body of the anti-collision device, and each of the flexible anti-collision units (2) is independent of each other. 2. The anti-collision device according to claim 1, characterized in that, the flexible anti-collision unit (2) is made of a rigid cylinder (1) filled with energy-dissipating materials. 3. The anti-collision device according to claim 2, characterized in that, the cylinder (1) of the flexible anti-collision unit (2) is made of steel plate, and the energy dissipation material filled inside is polyurethane material, glass foam , Modified polypropylene, PVC foam, PMI foam, aluminum foam, polyphenylene foam, polyimide foam or one or more of them. 4. The anti-collision device according to claim 3, characterized in that buckles (5) are provided on the steel cables (4) on both sides of the opening of the rigid shaft (3) of the flexible anti-collision unit (2). ), and the flexible anti-collision unit (2) is fixed on the steel cable (4) through the buckle (5). 5. The anti-collision device according to claim 4, characterized in that, the buckle (5) is an annular buckle (5), and the steel cable (4) is provided with a fixed hook for the buckle (5). hole.