With the rapid development of China's economy, some standards of our highways will gradually change with the needs, making them more humanized and in line with international standards. The high-speed guardrail is the main form of the semi-steel guardrail. It is a continuous structure in which corrugated steel guardrails are splicedto each other and supported by columns.
Generally speaking, the slope of our highway and the height of the embankment are between1:1-1:4, if the straight depth of the side ditch is 4 meters, the equipment can be prevented from colliding. The beam guardrail steel is soft and has a strong ability to absorb collision energy. It has a good line of sight induction function, can be coordinated with the road line shape, has a beautiful appearance, can be used on a small radius curve, and the damage is easy to replace. The beam guardrail should not be set too high. It is recommended that the height of the fence in the normal area is 1.2m-1.5m, and the special area is 1.6m. This height is not easy to overturn and saves capital.The total length of 4320 mm (4 m after the end of installation),4 m for the interval of the column; the weight of 4 mm is 16.388 tons/km. 1.The width of the two beam guardrails is 310mm and the height is 85mm. The thickness is 3mm/4mm. The theoretical weight is 49.16kg for 3mm thick and 65.55kg for 4mm thick. The weight is 12.3tons per kilometer in thickness of 32.3mm. The high-speed guardrail is the main form of the semi-steel guardrail. It is a continuous structure in which corrugated steel guardrails are spliced to each other and supported by columns. beam width 505 mm, beam height 85 mm;
2. The standard length of the three-beam guardrail is 4320 mm; the thickness of the plate is 4 mm; the theoretical component is 102 kg, and the 130*130 square tube column is cooperative.Second, the column: standard Φ114/Φ140mm, length is usually 1.85 meters, 1.95 meters, 2 meters, 2.15 meters and post thickness 4.5MM according to demand; theoretical component: Φ11412.15kg / m,Φ140mm15.04kg / m, 250 columns per km, the standard section uses 250 post and 2 end caps per kilometer. These regulations are only a national one, but they are not unified, because the geographical position of each place is different, so we have to treat it in special circumstances, we can't do it all the same as per its rules, then it is very serious as It is related to the safety of people's lives. During the construction of the beam guardrail, the information of various facilities should be accurately grasped, especially the precise position of various pipes buried in the road base. During the construction process, no damage to the underground facilities is allowed. The guardrail can be divided into A and S grades according to the anti-collision level. The S-class guardrail is of a reinforced type and is suitable for use on particularly dangerous road sections on the road side. Class A is used for special roads. Commonly used roadside beam beam guardrails can be divided into five levels according to the anti-collision level: B, A, SB, SA, and SS.
