.The selection principles of bridge anti-collision guardrails have the following requirements
.
Anti-collision performance of bridge guardrails The selected guardrail type must be able to effectively absorb the design collision energy in terms of strength and prevent corresponding The out-of-control vehicle crosses the bridge or enters the opposite lane and causes it to change direction correctly.
. This principle is mainly based on the highway grade and the characteristics of dangerous objects on the outside of the bridge guardrail, that is, the determination of the anti-collision level. This principle is the basic requirement that all selected guardrails should meet, so this principle cannot be used as a basis for judgment on whether it is a reasonable choice.
.
Deformation degree of guardrail after collision The maximum dynamic deformation amount of guardrail after collision should not exceed the allowable deformation distance.
. This principle mainly considers whether a certain deformation of the vehicle is allowed after a collision. For example, bridge structures are generally located very high above the ground. Excessive deformation can easily cause guardrails to bear other load types besides vehicle collision forces, making the stress more complex. Steel guardrails are generally softer than concrete guardrails. If the deformation of the two after collision is to be consistent, the steel guardrail needs greater stiffness, and the steel guardrail material is correspondingly higher.
.
, environmental and landscape requirements
. ① Steel bridges should use metal beam-column bridge guardrails
. ② For landscape Bridges with special requirements should choose beam-column bridge guardrails or combined bridge guardrails
. ③In areas with severe snow accumulation, metal beam-column or combined bridge guardrails should be used
. ④ In order to reduce the self-weight of the bridge and reduce the impact of vehicle collision load on the bridge deck, metal beam-column guardrails should be used
. ⑤ For extremely large bridges spanning large bodies of water or when the clearance under the bridge is greater than or equal to , combined or reinforced concrete wall type bridge guardrails should be used
. ⑥ Small bridges, passages and culverts on grade two and above highways should be of the same type as the adjacent roadbed guardrails.
.Product picture template
.
Manufacturer wholesale Xiamen Zhangzhou stainless steel bridge anti-collision guardrail Longyan river bridge guardrail