temporary welded wire mesh fence-The trend of the world's steel industry development

Usually referred to as "isolation barrier", "protective net", then do you know the development of fenced nets in China? Since 30 years ago, after making fence production technology from abroad, more than 420 manufacturers of various types of fences have been produced, with an annual production capacity of more than 86 million tons. Usually, when we install the fence mesh outlet, we should separately pack the welded wire mesh and the column, put the welded wire mesh package on the tray, lay it with the packing tape, and then wrap the plastic film. Specifically, according to customer requirements, if there is no requirement for customer care, do moisture, rust, and prevent mesh bending. The shear resistance of the fence joint (in N) shall be not less than the product of 150 and the nominal cross-sectional area of ​​the thicker steel (in mm 2).

 

At present, the domestic fence network products are the trend of the world's steel industry development. The use of welded wire mesh as the main material is both a new type of high-performance structural material and an efficient construction technology. The use of roads or railways has the characteristics of improving engineering quality, simplifying construction, shortening construction period, saving steel and reducing cost. It is especially suitable for large-surface highway projects.

 

China has become a major steel country in the world, but the deep-added technical industry of steel wire rods (low-carbon steel wire) is far behind foreign countries. Due to the old concept and insufficient understanding, the road fence network limits the application of low-carbon steel wire welding technology. The level of automation, for the large-scale use of large-scale automatic welding machines, has made China's construction technology modernization industry a step forward, providing a new economic growth point for the steel market, which will definitely bring a new revolution to the metallurgical and construction industries. . The extensive and rapid application of cold-drawn ribbed steel bars and hot-rolled iii-grade steel bars in China provides a good material basis for the development of fenced nets. The official implementation of fenced product standards and usage procedures has played a positive role in improving product quality and speeding up the application.

 

In order to strengthen the cement fence and welded mesh, the cement fence uses concrete castings, which has low engineering cost and high strength. The color plastic layer of the mesh fence has good corrosion resistance and decorative effect, which clearly highlights its integrity. Strong, sturdy and durable, easy to transport, easy to install, harmonious and beautiful, it is the most closed product of the railway, so it is favored by the railway department. Production process: wire cutting and straightening - mesh welding - frame and mesh welding - galvanizing, dip or spray. Installation process: isolation grid production - cement column prefabrication - pre-embedded column - isolation grid frame and column connection. Anti-corrosion treatment: electro-galvanized, hot-dip galvanized, spray-coated, dip-coated.

 

The railway fence net with cement column has a simple structure and beautiful appearance, and adopts an assembled overall frame structure, which is beneficial to construction and quick installation. Other uses: It can also be used in station fences, service area fences, open storage fences, port fences, road isolation, park development zone columns, residential community fences, etc. Fence net is one of the access traffic safety facilities. It is used to close highways, prevent pedestrians and livestock from entering highways or other prohibited areas, and prevent illegal land occupation. It is an important facility to maintain road rights. The highway fence network can effectively eliminate lateral disturbances, avoid the resulting traffic delays or traffic accidents, and ensure the effectiveness of highways. The road fence mesh product is beautiful and durable, non-deformable and quick to install. It is an ideal metal fence product. It can be made into a permanent mesh wall or as a temporary isolation net. It only needs to be fixed by different columns. Can achieve. With anti-corrosion, anti-aging, anti-sun, weather resistance and other characteristics. For the anti-corrosion form, there may be a method of electroplating, hot-plating, spray-coating, or dip-coating. Use and scope of use: mainly used for park/zoo fence, campus/field enclosure, road traffic isolation, temporary isolation zone.

 

The main specifications of the road fence network are as follows: net size 2.3M×3M 30cm above 30° bending grid size: 75mm × 150mm 50mm × 100mm M80mm × 160mm Frame size: 20 × 30 × 1 mm square Tube surface treatment: green dip. The specifications of the road fence network are various. According to different terrains, the construction department designs different drawings and evaluates and produces according to the drawings. Highway fence network is the most important transportation infrastructure. China's expressway was developed from the 1980s, and it plays an important role in the development of national economy and society. It is an important maintenance and safety guarantee facility for expressways.

 

Railway fence nets can be divided into metal mesh, (welded wire mesh, woven mesh), steel mesh, barbed wire and evergreen hedge according to the materials used. The regular hedges are used in conjunction with the thorn wire fence in the south, which has the comprehensive effect of sound insulation, noise reduction, beautification of road capacity and investment saving. The form of the fence network chooses the form of the fence network. In addition to considering its performance, cost, aesthetics and coordination with the surrounding environment of the road, factors such as construction conditions, maintenance and terrain should also be considered.

 

Generally speaking, the important section of the expressway should be selected from the metal type, and the secondary section should be the thorn wire. 1. Welded wire mesh, woven mesh and steel mesh metal fence net are a structural form with reasonable structure and beautiful appearance, but the unit cost is high, so it is mainly suitable for: road sections close to urban densely populated areas; 2) roads The landscape requires the selection of scenic spots, tourist areas, famous places and other sections in a beautiful and isolated form;) on both sides of important facilities such as simple interchanges, service areas, parking areas, management offices and toll stations; among them, structurally, The woven mesh is more suitable for the uneven terrain, while the steel mesh and welded mesh are more suitable for the flat terrain. 2, barbed wire fence thorn wire fence network is a relatively economical and simple structure, but the aesthetics, durability is poor, often used in: sparsely populated areas, mountainous areas; 2) suburban road reserves; 3) suburbs Below the elevated structure; 4) a section that needs to be closed across the ditch.

The principle of setting up the railway fence network should meet one of the following conditions. The fence network may not be provided: the natural barriers such as canals, ponds and lakes on the roadside of highways and first-class highways are considered to be free from fear of entering and illegally occupying the sections of highway land. . On the road side of expressways and first-class highways, there are steep ridges such as retaining walls or masonry stones with a height of more than 1.5M, and sections where humans and animals cannot enter. Structures such as bridge tunnels, except for bridgeheads and openings, need to be connected to sections of the embankment isolation facility.