Wave guardrails with different anti climb fence

At the end of 2017, the Ministry of Transport revised the "Code for Design of Highway Traffic Safety Facilities" in a comprehensive manner. In the new specification, the "anti-collision level" of the wave guardrail was adjusted to the "protection level", and the original C-class, B-class, A-class, and SB-level The SA-level anti-collision level has increased the anti-collision level of HB and HA.

 

    The new specification clarifies that the wave guardrails of different anti-collision levels should be set according to the actual conditions of the road. Compared with the "Code for Design of Road Traffic Safety Facilities" formulated in 2006, the new specifications determine the setting conditions of the wave guardrail and the level of collision avoidance. More specific, the operability is greatly increased.

 

    The new specification explains the protection energy corresponding to each anti-collision level of the wave guardrail. The protection energy of the C-level wave guardrail is 40kJ, the protection energy of the B and Bm wave guardrail is 70kJ, and the protection energy of the A and Am wave guardrail is 160kJ. The protection energy of SB and SBm wave guardrail is 280kJ, the protection energy of SA, SAm wave guardrail is 400kJ, the protection energy of SS, SSm wave guardrail is 520kJ, the protection energy of HB wave guardrail is 640kJ, HA wave The protective energy of the guardrail is 760kJ. According to the experience of use.

 

    The SS-level wave guardrail has been able to meet the design requirements of most national highways for guardrails, but in some mainstream models, the high-weight large-size passenger car (25t), the large truck (40t, 55t) and the vehicle rollover or rushing Breaking guardrails will lead to serious consequences for bridge sections, and HB and HA grade guardrails will provide better protection.

 

    Finally, it should be noted that the new specification has refined the choice of wave guardrails for the third- and fourth-class roads with a speed of less than or equal to 40Km/h. The normal section can use the C-level wave guardrail, but it is considered in the case of serious consequences. Use Class B and Class A wave guardrails. This stipulates that the guardrails should be set up according to local conditions, which greatly reduces the state's investment in traffic safety facilities, reduces the burden on the state's finances, and has a long-term implementation.