CN111705697A - Wind-resistant traffic sign and installation method thereof - Google Patents

Abstract

The invention relates to a wind-resistant traffic sign and an installation method thereof. The present invention includes a sign board, an angle conversion member and a sign stand beam. The sign board includes a plurality of blades with inclined angle arranged side by side, and the edge of each blade is provided with a folded edge. The side-by-side arrangement of the blades can be horizontally arranged or vertically arranged; the two forearms of the angle conversion member are riveted with the blades, and the angle is converted The two rear arms of the component are riveted with the vertical beam of the sign plate; the surface of the blade is provided with a retroreflection layer. The invention guides the air flow through the sign board through the gap between the blades with the inclination angle, greatly reduces the wind receiving area of the sign board board, thereby reduces the wind load borne by the board board, and improves the wind resistance performance of the sign board. The design of wind-resistant traffic signs composed of multiple inclined blades reduces the wind pressure on the board, reduces the bending damage to the traffic sign board and the tilt damage of the card frame, prolongs the service life, and reduces the traffic sign board. The cost of construction and maintenance reduces the expenditure of manpower and material resources.

Description

Wind-resistant traffic sign and installation method thereof

technical field

The invention belongs to the technical field of highway traffic facilities, and relates to a wind-resistant traffic sign and an installation method thereof. Specifically, it is a traffic sign that uses a plurality of blades arranged side by side as a sign board to improve wind resistance stability.

Background technique

With the rapid development of the world economy, the process of global modernization cannot be delayed. Expressway is known as a bridge for a country to modernize, and it is the only way to develop modern transportation industry. Among them, traffic signs are known as "road lighthouses" and are important facilities for introducing road traffic information and ensuring road traffic safety. In order to solve the problem that the use function of the traffic sign plate is affected by the strong wind and even the tilting damage of the card frame in the process of expressway construction, and to meet the requirements of economy, wind resistance stability, visual friendliness (visual recognition) To extend its service life and reduce its maintenance costs, the structural form of traffic signs is constantly developing and innovating.

The traditional traffic signs have a large windward side, and the traffic signs need to bear a large wind load, and the structure has insufficient wind resistance. It is worth mentioning that for the traffic sign with cantilever structure, the wind load on its surface will cause the cantilever beam to bear excessive bending moment and the column to bear excessive torque, so it is necessary to increase the beam, Only the column size can meet the bearing capacity requirements, resulting in waste of material and energy. Therefore, the blade design of the wind-resistant traffic signboard composed of a plurality of blades with inclination angle guides the air flow through the signboard through the gap between the blades with an inclination angle, which greatly reduces the wind-receiving area of the signboard and reduces the wind that the signboard bears. It can reduce the bending damage of the traffic sign board and the inclined damage of the card frame by the wind, and improve the wind resistance performance of the sign. The traffic sign board provided by the invention is composed of a plurality of inclined blades arranged side by side, and is a wind-resistant traffic sign composed of a plurality of inclined blades with simple structure, safety and reliability, superior performance and durability. Especially in the areas where the terrain is flat and the wind load has a great influence on the stability of the signboard, such as the offshore sea surface, islands and coasts, the invention has strong adaptability.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a wind-resistant traffic sign and an installation method thereof. The air flow is guided through the sign board through the gap between the angled blades, which greatly reduces the wind-receiving area of the sign board, thereby reducing the wind load on the board, reducing the bending damage of the traffic sign board and the card frame caused by the wind. The inclined damage of the signboard improves the wind resistance of the sign.

The wind-resistant traffic signboard of the present invention includes a signboard plate, an angle conversion member and a signboard vertical beam. The sign board includes a plurality of blades with inclined angles arranged side by side, the edges of each blade are provided with hem, and the side-by-side arrangement direction of the blades can be horizontally arranged or vertically arranged; the two forearms of the angle conversion member are riveted with the blades. , the two rear arms of the angle conversion member are riveted with the vertical beam of the sign plate; the surface of the blade is provided with a retroreflection layer. The two front arms and the two rear arms of the angle conversion member are connected by the side plates of the two angle conversion members. Each blade is provided with two or more angle conversion members. According to the basic wind pressure and ground roughness parameters of the traffic sign installation area, based on the required size and design installation height of the sign board, the design wind pressure of the sign board is determined: the design wind pressure satisfies the following relationship: w = γ _w × β _z ×μ _s ×μ _z ×w ₀ , where w is the design wind pressure of the sign board, γ _w is the load sub-item coefficient of wind load, β _z is the wind vibration coefficient at the height of the board top of the sign board, μ _s is the body shape coefficient of wind load, μ _z is the height variation coefficient of wind pressure at the top of the sign board, and w ₀ is the basic wind pressure of the place.

The blade size and the size of the sign plate with the vertical arrangement of the blade meet the following relationship: B=n _yp × b _yp ×cos(α); wherein, B is the width of the sign plate, n _yp is the number of blades, b _yp is the width of the blade, and α is the inclination angle of the blade. The blade size and the size of the sign plate in the horizontal arrangement of the blades satisfy the following relationship: H=n _yp × _byp ×cos(α); wherein, H is the length of the sign plate. When the blades are arranged vertically, the blade inclination is defined as the angle between the blade and the horizontal direction of the sign board, and the clockwise inclination on the top view of the sign is positive. If the sign is installed on the right side of the road, the blade inclination is in the range of 0 degrees to 15 degrees; if the sign is installed on the left side of the road, the blade inclination is in the range of -15 degrees to 0 degrees; if the sign is installed on the In the middle of the road, the blade inclination is in the range of -15 degrees to 15 degrees. When the blades are arranged horizontally, the blade inclination is defined as the angle between the blade and the horizontal direction of the sign board. The clockwise inclination on the left view of the sign is positive, and the blade inclination is in the range of 0 degrees to 15 degrees. The traffic sign is connected with the beam through the sliding bolt through the chute structure of the vertical beam of the sign.

The transmission sequence of wind load is: sign plate (blade) - sign angle conversion member - sign beam - sign beam member - sign column member - sign embedded foundation - ground. The blade bears the pressure caused by the wind load, the multiple angle conversion components share the pressure from the blade, and the signboard vertical beam bears the pressure from the multiple angle conversion components. When the blades are arranged vertically, the force transmitted to the angle conversion member satisfies the following relationship: F _yp-zh =w×H×b×cos(α)/n _zh ; where, n _zh is the number of conversion members connected to each blade . When the blade is arranged laterally, the force transmitted to the angle conversion member satisfies the following relationship: F _yp-zh = w×B×b×cos(α)/n _zh ; no matter how the blade is arranged, the angle conversion member transmits the force to the signboard beam. The force satisfies the following relationship: F _zh-ll =n _yp ×F _yp-zh .

The length and width of the projection of the angle conversion member on the blade are smaller than the width and length of the blade in the corresponding direction. The anchoring strength of the rivet should be greater than the strength of the sign plate, the angle conversion member and the vertical beam. The number of rivets on each connection surface should be two or more, and they are evenly distributed on the connection surface.

The signboard plate, the angle conversion member and the signboard vertical beam are made of light-weight and high-strength materials.

The retroreflective layer is selected from a reflective film.

The installation method of the above wind-resistant traffic signs is as follows:

Step 1. Factory prefabrication: paste the retroreflective layer on the surface of the blade; the work flow for pasting the retroreflective layer is to engrave the reflective film in sequence, paste the transfer film on the surface, and tear off the excess part other than the content of the signboard, according to the size and vision of the blade. Design the angle, cut and cut, and finally use the transfer film to align the places where the leaves of the traffic sign are to be attached and press tightly, and tear off the transfer film. On the premise of ensuring the visibility of the sign board, the sign board is cut into strips and pasted on the surface of the sign board.

Step 2: Factory prefabrication: production and processing of blades and angle conversion components; the blades are all set with hemming, and the hemming process is completed by a hemming machine. The assembly work between the components is produced by welding, and the material is preferably steel. The parameters of the number and width of blades are rounded to reduce errors in component production and assembly construction. At the same time, select the appropriate production length of blades and vertical beams according to the production conditions of the factory machine tool and the transportation and installation conditions.

Step 3: Factory prefabrication: The blade and the signboard angle conversion member are fixedly connected.

Step 4. On-site installation: Connect the fixed connection between the angle conversion member and the vertical beam; if the blades are arranged horizontally side by side, the fixed connection between the angle conversion member and the vertical beam is prefabricated in the factory, saving construction time on site. If the blades are arranged vertically side by side, if the fixed connection between the angle conversion member and the vertical beam is prefabricated in the factory, the overall size will be large. In order to save transportation costs, choose on-site installation to complete the connection between the angle conversion member and the signboard vertical beam. Connection works.

The invention guides the air flow through the sign board through the gap between the blades with the inclination angle, greatly reduces the wind receiving area of the sign board board, thereby reduces the wind load borne by the board board, and improves the wind resistance performance of the sign board. The wind-resistant traffic sign design composed of multiple inclined blades reduces the wind pressure on the sign board, reduces the bending damage to the traffic sign board and the tilt damage of the card frame, prolongs its service life, and reduces traffic. The cost of construction and maintenance of the sign board reduces the expenditure of manpower and material resources.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the structural representation of the angle conversion member in Fig. 1;

Fig. 3 is another structural representation of the angle conversion member in Fig. 1;

4 is a schematic structural diagram of a preferred embodiment of the present invention;

FIG. 5 is a schematic diagram of a partial installation structure of the present invention.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings.

As shown in Figure 1, a wind-resistant traffic sign includes a sign board, an angle conversion member and a sign beam. The sign board includes a plurality of angled blades arranged side by side. The edge of each blade is provided with a hem. The direction of the side-by-side arrangement of the blades can be selected horizontally or vertically. The blade 1 is connected with the vertical beam 3 of the sign board through the angle conversion member 2, and the surface of the blade is provided with a retroreflection layer. The connection between the blade 1 and the angle conversion member 2 is realized by riveting the two front arms 2a of the angle conversion member to the blade 1, and the connection between the angle conversion member 2 and the signboard vertical beam 3 is through the two rear arms 2b of the angle conversion member and the vertical beam. 3 riveting to achieve. Among them, the two front arms 2a and the two rear arms 2b of the angle conversion member are connected by the side plates 2c of the two angle conversion members. Each blade shall be equipped with two or more angle conversion members. The length and width of the projection of the angle conversion member on the blade are smaller than the width and length in the corresponding direction of the blade. The anchoring strength of the rivet should be greater than the strength of the sign plate, the angle conversion member and the vertical beam. The number of rivets on each connection surface should be two or more, and they should be evenly distributed on the connection surface. The rivet spacing between the rivets and the maximum distance (spacing) and minimum distance (spacing) from the edge of the connection surface should meet the requirements of steel structure connection rivets Provisions.

According to the basic wind pressure and ground roughness parameters in the installation area of the traffic sign, the design wind pressure of the sign is determined based on the required size and design installation height of the sign. The calculation formula of the design wind pressure is: w=γ _w ×β _z ×μ _s ×μ _z ×w ₀ , where w is the design wind pressure of the signboard, γ _w is the load sub-item coefficient of the wind load, and β _z is taken as The wind vibration coefficient at the height of the board top of the sign board, μ _s is the body shape coefficient of the wind load, μ _z is the height variation coefficient of the wind pressure at the top height of the board board of the sign board, and w ₀ is the basic wind pressure of the place. Dimensions include the length, width, thickness, etc. of the components of the traffic sign;

According to the design service life and load conditions of the traffic sign, the type of the traffic sign and the material of the sign coating, the sign plate, the angle conversion member and the sign beam are selected. Among them, because the structural type of the signboard does not affect the force and use of the signboard surface, the structural types used in the present invention include single-column type, single cantilever type, double cantilever type and gantry type.

Lightweight and high-strength materials such as aluminum alloy plates, thin steel plates, and synthetic resin plates can be selected as the materials of the signboard plate, the angle conversion member and the signboard vertical beam. The material of the signboard coating can be reflective film or other materials that can realize retroreflection. For some special areas, such as deserts and coastal areas, it is also necessary to consider the durability of the component materials; according to the orientation of the traffic signs, on the premise of satisfying the working visual effect (visibility) of the traffic signs, determine the The direction (horizontal arrangement or vertical arrangement) and size (number) of the blade inclination angle allow the airflow to pass through the signboard with the highest efficiency. The blade size and the size of the sign plate with the vertical arrangement of the blade meet the following relationship: B=n _yp × b _yp ×cos(α); wherein, B is the width of the sign plate, n _yp is the number of blades, b _yp is the width of the blade, and α is the inclination angle of the blade. The blade size and the size of the sign plate in the horizontal arrangement of the blades satisfy the following relationship: H=n _yp × _byp ×cos(α); wherein, H is the length of the sign plate.

Due to cost factors, from an overall point of view, there is no specific size and number of blade pitch that can be recommended as the optimal configuration parameters: wind loads decrease with increasing blade pitch and with increasing number of blades, but sign The cost of building cards has also increased. Among them, the working visual effect (visibility) of the traffic sign is designed on the premise of ensuring that the driver on the road can clearly see the content of the traffic sign. The vehicle on the road looks up at the visual effect of the traffic sign, as shown in Figure 4 shown;

The working visual effect (visibility) of the traffic sign can take the driver or pedestrians from 30 meters to 110 meters away from the sign, and the content of the sign can be recognized within the range of -15 degrees to 15 degrees to determine the direction of the blades of the sign and inclination angle. Among them, the inclination angle should be selected within the range of -15 degrees to 15 degrees to ensure the visibility of the sign.

Traffic signs mainly bear their own gravity load and wind load. Among them, the calculation of wind load is an important step to determine the size and strength of the components of this sign. If the size or strength is too small, the traffic sign board will be damaged by strong wind bending and the tilting damage of the card frame, which will affect its use function; if the size or strength is too large, it will cause waste of materials and increase in cost.

The face of this traffic sign is different from that of the traditional traffic sign. The design of the traditional traffic sign does not involve blade components and angle conversion components, so the force transmission method is different from that of the traditional sign. Computational method to design this traffic sign.

As shown in Figure 5, the traffic sign is connected to the beam through the sliding bolt through the chute structure of the vertical beam. Among them, the transmission sequence of wind load is: sign plate (blade 1) - sign angle conversion member 2 - sign beam 3 - sign beam member 4 - sign column member - sign embedded foundation - ground.

When calculating the overall force, the blade 1 bears the pressure caused by the wind load, the multiple angle conversion members 2 share the pressure from the blades, and the vertical beam 3 bears the pressure from the multiple angle conversion members. When the blades are arranged vertically, the force transmitted to the angle conversion member can be approximately taken as: F _yp-zh =w×H×b×cos(α)/n _zh ; where, n _zh is the number of conversion members connected to each blade . When the blade is arranged laterally, the force transmitted to the angle conversion member satisfies the following relationship: F _yp-zh = w×B×b×cos(α)/n _zh ; no matter how the blade is arranged, the force transmitted by the angle conversion member to the vertical beam can be Approximately take: F _zh-ll =n _yp ×F _yp-zh .

The design value of wind load can be multiplied by a reduction factor ψ of 0.7~1.0 by the wind load designed by traditional traffic signs. The specific reduction coefficient value should be determined strictly according to wind tunnel experiments or FCD numerical simulation methods. Specifically, the reduction coefficient ψ can be selected to be represented by parameters such as r _MT , r _MW , r _FT , and r _FW .

Wherein, r _MT is the ratio of the total bending moment at the connection point between the column of the patent sign and the ground and the total bending moment at the connection point between the column of the traditional sign and the ground, and r _MW is the connection point between the column and the ground of the patent sign The ratio of the bending moment caused by the force perpendicular to the windward side at the ground connection point and the bending moment caused by the force perpendicular to the windward side at the ground connection point, r _FT is the resultant force at the connection point between the column of the patent sign and the ground connection point and The ratio of the resultant force at the connection point between the column of the traditional sign board and the ground, r _FW The vertical force of the windward surface at the connection point between the column of the patent sign and the ground and the vertical force of the windward surface at the connection point between the column of the traditional sign board and the ground ratio.

The production and installation method of the above-mentioned traffic sign specifically includes the following steps:

Step 1. Factory prefabrication: Paste the retroreflective material on the surface of the blade; the general pasting process of the retroreflective material is to engrave the reflective film in sequence, paste the transfer film on the surface, and tear off the excess part other than the content of the sign. According to the size of the blade and the Design from the visual angle, cut and cut, and finally use the transfer film to align the places where the leaves of the traffic sign are to be attached and press tightly, and tear off the transfer film. It should be pointed out that in view of reducing costs, improving production efficiency, and realizing industrialized assembly line production, efficient production processes such as electro-etching process and digital printing process can be preferred. On the premise of ensuring the visibility of the sign board, the sign board is cut into strips and pasted on the surface of the sign board.

Step 2: Factory prefabrication: production and processing of components such as blades and signboard angle conversion components; the blades are all set with hemming, and the hemming process can be completed by a hemming machine. The assembly work between the components is welded, and the material is preferably steel, and due to the poor welding performance of aluminum alloys, the use of aluminum alloys as production materials should be avoided. In the determination of the parameters of the number and width of blades, for practical projects, the parameter selection must round up the width of the blades and the number of blades, which is beneficial to control the errors in component production and assembly construction. According to the production conditions of the factory machine tool and the transportation and installation conditions, select the appropriate production length of the blade and the signboard vertical beam.

Step 3: Factory prefabrication: the blade and the angle conversion member of the signboard are fixedly connected; the blade and the angle conversion member are welded.

Step 4. On-site installation: the fixed connection between the angle conversion member and the signboard beam; if the blades are arranged horizontally side by side, the fixed connection between the angle conversion member and the vertical beam can be prefabricated in the factory, saving construction time on site. If the blades are arranged vertically side by side, if the fixed connection between the angle conversion member and the vertical beam can be prefabricated in the factory, the overall size will be large. In order to save transportation costs, in this case, it is better to choose on-site installation to complete the connection. Fixed connection work of angle conversion members and vertical beams. Welding of angle conversion members and signboard vertical beams.

The above descriptions are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims (6)

1. a wind-resistant traffic sign, comprising a sign board, an angle conversion member and a sign stand beam; it is characterized in that: the described sign board comprises a plurality of side-by-side with inclination blades, and the The edges are all folded, and the side-by-side arrangement of the blades can be horizontal or vertical; the two front arms of the angle conversion member are riveted to the blades, and the two rear arms of the angle conversion member are riveted to the signboard vertical beam; the blade surface is provided with retroreflection Layer; the two front arms and the two rear arms of the angle conversion member are connected through the side plates of the two angle conversion members; each blade is provided with two or more angle conversion members; according to the basic wind of the installation area of the traffic sign Pressure and ground roughness parameters, based on the required size and design installation height of the sign board, determine the design wind pressure of the sign board: the design wind pressure satisfies the following relationship: w = γ _w × β _z × μ _s × μ _z × w ₀ , where w is the design wind pressure of the sign board, γ _w is the load sub-item coefficient of the wind load, β _z is the wind vibration coefficient at the height of the board top of the sign board, μ _s is the body shape coefficient of the wind load, μ _z is the wind pressure height variation coefficient of the top height of the sign board, and w ₀ is the basic wind pressure of the place; The blade size and the size of the sign plate with the vertical arrangement of the blade meet the following relationship: B=n _yp × b _yp ×cos(α); wherein, B is the width of the sign plate, n _yp is the number of blades, b _yp is the width of the blade, and α is the inclination angle of the blade. The blade size and the size of the sign plate in the horizontal arrangement of the blades satisfy the following relationship: H=n _yp × _byp ×cos(α); wherein, H is the length of the sign plate. When the blades are arranged vertically, the blade inclination is defined as the angle between the blade and the horizontal direction of the sign board, and the clockwise inclination on the top view of the sign is positive. If the sign is installed on the right side of the road, the blade inclination is in the range of 0 degrees to 15 degrees; if the sign is installed on the left side of the road, the blade inclination is in the range of -15 degrees to 0 degrees; if the sign is installed on the In the middle of the road, the blade inclination is in the range of -15 degrees to 15 degrees. When the blades are arranged horizontally, the blade inclination is defined as the angle between the blade and the horizontal direction of the sign board. The clockwise inclination on the left view of the sign is positive, and the blade inclination is in the range of 0 degrees to 15 degrees. The traffic sign is connected with the beam through the sliding bolt through the chute structure of the vertical beam of the sign; The transmission sequence of wind load is: sign plate (blade) - sign angle conversion member - sign beam - sign beam member - sign column member - sign embedded foundation - ground; the blade is caused by wind load. Pressure, multiple angle conversion members share the pressure from the blades, and the signboard vertical beams bear the pressure from multiple angle conversion members; when the blades are arranged vertically, the force transmitted to the angle conversion members is approximately taken as: F _yp-zh =w×H×b×cos(α)/n _zh ; wherein, n _zh is the number of conversion members connected to each blade; the force transmitted to the angle conversion members when the blades are arranged laterally satisfies the following relationship: F _yp-zh =w×B×b×cos(α)/n _zh ; no matter how the blades are arranged, the force transmitted by the angle conversion member to the signboard vertical beam is approximately taken as: F _zh-ll =n _yp ×F _yp-zh . 2. the installation method of a kind of wind-resistant traffic sign board as claimed in claim 1 is characterized in that: specifically comprises the following steps: Step 1. Factory prefabrication: paste the retroreflective layer on the surface of the blade; the work flow for pasting the retroreflective layer is to engrave the reflective film in sequence, paste the transfer film on the surface, and tear off the excess part other than the content of the signboard, according to the size and vision of the blade. Design the angle, cut and cut, and finally use the transfer film to align the places where the leaves of the traffic sign are to be attached and press down, and tear off the transfer film; under the premise of ensuring the visibility of the sign board, the sign board is cut and pasted in strips. on the surface of the sign board; Step 2. Factory prefabrication: production and processing of blades and angle conversion components; the blades are all set with hemming, and the hemming process is completed by a hemming machine; the assembly work between the components is produced and connected by welding, and the material is preferably steel; The width parameters are rounded to reduce the error of component production and assembly construction; at the same time, according to the production conditions of factory machine tools and transportation and installation conditions, select the appropriate production length of blades and vertical beams; Step 3. Factory prefabrication: the blade and the signboard angle conversion member are fixedly connected; Step 4. On-site installation: connect the fixed connection between the angle conversion member and the vertical beam; if the blades are arranged horizontally side by side, the fixed connection between the angle conversion member and the vertical beam is prefabricated in the factory, saving construction time on site; if the blades are arranged vertically Arranged side by side, if the fixed connection between the angle conversion member and the vertical beam is prefabricated in the factory, the overall size will be large. In order to save transportation costs, choose on-site installation to complete the fixed connection between the angle conversion member and the signboard vertical beam. 3. A kind of wind-resistant traffic sign board as claimed in claim 1 is characterized in that: the length and width of the projection of the angle conversion member on the blade are less than the width and length of the corresponding direction of the blade; the anchoring strength of the rivet should be It is greater than the strength of the sign board, the angle conversion member and the vertical beam; the number of rivets on each connection surface should be two or more, and they are evenly distributed on the connection surface. 4 . The wind-resistant traffic sign as claimed in claim 1 , wherein the sign board, the angle conversion member and the sign beam are made of light-weight and high-strength materials. 5 . 5 . The wind-resistant traffic sign as claimed in claim 1 , wherein the retro-reflective layer is selected from a reflective film. 6 . 6 . The installation method of a wind-resistant traffic sign board as claimed in claim 2 , wherein the paste of the retroreflective layer in step 1 is selected from an electro-etching film process or a digital printing process. 7 .

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