guardrail highway bridge

guardrail highway bridge safety

guardrail highway bridge can be seen everywhere in the city, which is beautiful and generous, and can ensure the safety of pedestrians.guardrail highway bridge is a beautiful scenic line in the city.

guardrail highway bridge The design requirements of bridge guardrail are all based on the safety performance evaluation indexes, which are verified by collision tests under specific conditions. There is a very important parameter in the experimental collision condition, that is, the collision angle. The value of collision angle in China's norms is determined to be 20 degrees (15 degrees formulated by EU EN1317) on the basis of traffic accident investigation data and the latest relevant standards and research results of the United States, Japan and the European Union.

guardrail highway bridge building codes take more consideration of the prevention of natural disasters such as earthquake, typhoon, weathering and so on, while the impact of vehicles in the case of sudden occurrence is not fully considered. The intrinsic safety of some early-built guardrail highway bridge has been challenged. On the premise that the bearing capacity of guardrail highway bridge is allowed, it is necessary to add anti-collision barriers to the early designed bridges.

Application of highway guardrail

Improve the design criteria of auxiliary structures for guardrail highway bridge construction, fully consider the impact of incidental events on guardrail highway bridge and users when building new bridges, properly increase the roadside, enhance the anti-collision ability of anti-collision barriers, and achieve greater safety redundancy. No matter how strong the guardrail, how powerful the protective facilities, how much safety redundancy, can not completely avoid all accidents. Only by abiding by the rules and driving safely is the fundamental guarantee to ensure safety.

guardrail highway bridge setting principle

guardrail highway bridge must be installed on the outer and central partition zones of Expressway bridges. guardrail highway bridge must be installed on the outer side of ramp bridges along expressways.

As the primary and secondary highway bridges of trunk highway, roadside guardrails must be set up, and as the primary highway bridges of trunk highway, central partition guardrails must be set up.

As the first and second grade highway of the distribution highway, the roadside guardrail should be set up for the bridge, and as the first grade highway of the distribution highway, the central partition guardrail should be set for the bridge.

For many guardrail highway bridge with large gaps between main girders, the guardrail with central partition should have the same anti-collision grade as the guardrail at bridge side. For single bridge or two bridges with only settlement joints and sufficient strength of bridge deck, the guardrail with central partition should be designed according to the principle of setting guardrail with central partition in subgrade section.

Roadside guardrails should be set for grade 3 and 4 guardrail highway bridge across deep valleys, deep ditches and rivers and lakes, and sight guidance facilities or pedestrian guardrails should be set for bridges located in other sections without guardrails after comprehensive demonstration.

highway safety guardrail

guardrail highway bridge should determine special collision conditions and carry out special design for adjacent or across sections with special protection requirements such as reservoirs, oil depots and power stations.