highway guardrail network
Highway fence is a relatively important transportation infrastructure. China's expressways have been developed since the 1980s, and it plays an important role in the development of the national economy and society. It is an important maintenance and safety guarantee facility of expressway. Now some highways use grassland fence network (also known as grassland network). The grassland network is more solid, beautiful, economical and practical.
Chinese name Highway fence Specification 3.5mm-6.0mm Mesh 50mm × 100mm Column 48mm × 1.0-2.0mm
Basic overview
texture of material
Low carbon cold drawn steel wire Aluminium magnesium alloy Wire, galvanized wire.
Common specifications
Low carbon steel wire with high degree shall be used for welding. (Can be customized according to customer requirements)
Rectangular hole: 50 × 100, 75 × 150, 50 × 200, 60 × 150 are common.
Frame: 20 × 30 or 20 × 40mm rectangular section Welded pipe ； 0.8/1.0/1.2/1.5mm thick square tube
Weaving and characteristics
Braided and welded: the grid structure is simple, convenient for transportation, and the installation is not limited by the topographic relief, especially for mountains, slopes, and multi bend areas. The product is durable, medium to low price, and suitable for large area use.
Development and innovation
With the rapid development of domestic highway construction, the safety barrier market is expanding., However, since the product has been produced and used in China for less than ten years, the product standard has only been issued for five or six years, and the national standard has only been issued for two years, the manufacturers have different knowledge of the product's performance, technical parameters, and production process, resulting in the quality of this product being mixed. Due to the adoption of guardrail products with improper anti-corrosion process in some sections, the guardrail will be rusted for at least one or two years, which not only affects the visual effect of the expressway, but also greatly shortens the effective service life of the guardrail, and also increases the maintenance cost.
In our country, painting protection was usually adopted in the early stage, and then hot-dip galvanizing was gradually adopted, but still widely used in a large number of cases. Guardrail is a large long-term facility for outdoor use, and different protection systems should be selected for different atmospheric environments. The newly issued national standard GB/T18226-2000 Technical Conditions for Anticorrosion of Steel Members of Highway Traffic Engineering divides the protection of guardrail products into four categories: zinc plating, aluminum plating, plastic coating after zinc plating (aluminum), and plastic coating. In rural areas and areas with less serious pollution, separate hot-dip galvanized layer protection or separate plastic sprayed protective guardrail board can be used. In heavy industrial areas or coastal urban areas, especially in areas with acid rain, ordinary hot-dip galvanized or plastic sprayed single coating guardrail board may lose its effectiveness before its service life, resulting in a significant increase in the maintenance cost of the guardrail. For hot-dip aluminum guardrail, its corrosion resistance is better than that of ordinary hot-dip galvanized guardrail, but its application scope is not very wide due to its process, technology, cost and environmental impact. Compared with the protection system of hot-dip aluminized plastic spraying, the protection system of hot-dip aluminized plastic spraying is an uneconomical method. With plating Zinc plate The double protection system of plastic spraying can achieve better anti-corrosion effect in heavily polluted areas, especially in acid rain areas, and can greatly extend the service life. It is a more durable protection method.
alias
Highway fence is also called: highway fence, enclosure fence, traffic fence, highway fence board, highway fence, highway barrier, highway fence. In fact, it is just a change of name. Its essence is still fence, and there is no difference between products. Highway guardrail net is a common kind of guardrail net series products. It is woven and welded with domestic high-quality low-carbon steel wire and aluminum magnesium alloy wire, and has the characteristics of flexible assembly, solid and durable. It can be made into a long-term fence wall for use, or used as a temporary isolation network. In use, it can be achieved by using different column fixing methods. Highway guardrails are widely used on many highways in China and have achieved good results.
Specifications
Specifications and parameters of highway guardrail net are as follows:
Frame guardrail net Triangular bent guardrail net Double side wire guardrail net Double circle guardrail net Hot dip galvanized guardrail net
Mesh (mm) 75 * 150, 50 * 50 50 * 180 60 * 120 75 * 150 50 * 50
Mesh (mm) 1800 * 3000 2300 * 2900 2300 * 3000 1800 * 3000 1800 * 3000
Dipped wire diameter (mm) 6.8 5.0 3.5-8.0 4.9 4.8
Column size (mm) 48 * 2 48 * 2.5 48 * 2 48 * 2 48 * 2 48 * 2
Wave shaped fence
Mesh (mm) 50 * 100, 50 * 200 50 * 50 75 * 150 220 * 280 50 * 50
Mesh (mm) V-shaped stiffener 1800 * 3000 3000 * 4000 2400 * 3000 133 * 1580 1800 * 3000
Dipped wire diameter (mm) 5.0 3.8 4.5-5.0/3.0
Column size (mm) 60 * 60, 70 * 100, 60 * 60, 48 * 2/48 * 2
Product features
Highway guardrail net can be divided into two types according to the manufacturing characteristics. One is Electric welding Mesh guardrail, and the other is the decorative mesh guardrail. Both of these guardrails are widely used in protection. The welded mesh guardrail is welded by the welding mesh machine to the iron wire, cold galvanized iron wire or hot galvanized iron wire, and then processed and manufactured by multiple processes such as bending, plastic spraying or PVC. It has the characteristics of corrosion resistance, beauty, and effective protection. The barbed wire fence is a metal wire of various materials, including PVC wire, cold and hot galvanized wire, etc. Checked. It has strong impact resistance, beautiful appearance, corrosion resistance, good protection and other characteristics.
The product is beautiful and durable, does not deform, and is fast to install. It is an ideal metal guardrail product. It can be made into a durable mesh wall, and can also be used as a temporary isolation network. It can be achieved by using different column fixing methods. It has the characteristics of anti-corrosion, aging relief, sun resistance, weather resistance, etc. For anti-corrosion, electroplating, hot plating, plastic spraying and plastic dipping can be used.
Product form
(1) The middle guardrail of the road is a kind of guardrail net set in the center of the road, which is mainly used to separate the ascending and descending sequence of vehicles. Prevent vehicles from entering the reverse road, and prevent non motor vehicles and pedestrians from crossing or crossing the road at will, so as to ensure good traffic order and prevent accidents. This guardrail is usually pier type or railing type made of cement, metal or both cement and metal.
(2) The barrier of separation pier is set between the motorway and non motorway on one or both sides of the road, which is mainly used to separate non motor vehicles from motor vehicles. It plays the role of traveling in order without interference. This guardrail is mostly made of cement or metal materials, with a height of about 600mm.
(3) Pedestrian guardrail is set outside the sidewalk at the intersection or between the sidewalk and the roadway. It is mainly used to prevent pedestrians from oblique crossing and crossing at random in the intersection and on the roadway, and secondly, to prevent vehicles from entering the sidewalk to avoid obstacles. It plays a role in ensuring good traffic order and pedestrian safety.
Scope of use
Highway fence: mainly used for park/zoo fence, campus/site enclosure, road traffic isolation and temporary isolation belt.
Surface treatment: green dip molding.
The specifications of highway guardrail net are various. Different drawings are designed according to different terrains, and then they are evaluated and produced according to the drawings.
