Guardrail cable barrier is the main representative form of flexible guardrail. It is a structure composed of several cables applied initial tension fixed on the column. It mainly relies on the tensile stress of the cable to resist the collision of vehicles and absorb collision energy.Guardrail cable barrier is a flexible structure, the cable in the elastic range of work, can be reused, easy to repair.The column spacing is more flexible and less affected by uneven subsidence.Scenic highway using Guardrail cable barrier more beautiful.Snow areas, Guardrail cable barrier on the snow barriers to slightly less.But the Guardrail cable barrier construction is complex, the end column damage repair difficulty, is not suitable in the small radius curve section use;At the same time, its line of sight is poor guidance, erection of short length is not economical.
Guardrail cable barrier can be classified according to their location, anti-collision level and embedding method.According to the location of the Guardrail cable barrier field test project can be divided into two categories of roadside and central separation zone, roadside Guardrail cable barrier collision prevention level is divided into A class and s class two categories, s class guardrail is an enhanced type, suitable for dangerous sections.The central divider's tether barrier has A collision rating of class A.The conditions of embedding can be divided into two categories: buried in soil and concrete. The method of concrete foundation is adopted in the places where the column cannot be hit and the places where the subgrade filling cannot guarantee the embedded depth of the column.
Guardrail cable barrier are divided into leaching type B (common type), leaching type A (reinforced type);Hot dip galvanized type B (normal), hot dip galvanized type A (reinforced).6 cables for class A and 5 cables for class B. The initial tension of class A and B cables is 201d~. The cables are made of 3x7 galvanized/right-twisted structure with high strength and excellent corrosion resistance.
Compared with traditional guardrails, Guardrail cable barrier are characterized by good flexibility, strong impact resistance, good crashworthiness, good resistance to snow and wind.In addition, better permeability of the Guardrail cable barrier will be more conducive to visitors to appreciate the natural landscape.
Guardrail cable barrier for highway, railway and bridge on both sides of the protective belt;Security protection of airports, ports and docks;Highway, mountain and tourist attractions road safety protection.
