As an important component widely used in road safety facilities, the design and classification method of corrugated guardrail is directly related to the safety and stability of road driving. The classification method of corrugated guardrail can be analyzed from multiple dimensions such as shape, thickness, standard size and collision avoidance grade, in order to provide a useful reference for road construction and safety facility configuration.
First of all, from the perspective of appearance, corrugated guardrails can be divided into two main categories: two-wave guardrails and three-wave guardrails. These two types of guardrails differ in structural design and functional characteristics, and are suitable for different road environments and safety needs.
A two-wave guardrail, as the name suggests, refers to a guardrail structure whose cross-section is in a double waveform. This kind of guardrail has the advantages of simple structure, easy installation and low cost, so it has been widely used on some ordinary roads and rural roads. There are three common specifications of the thickness of the two-wave guardrail are 2.5mm, 3.0mm and 4.0mm, and the guardrails of different thicknesses have different impact resistance and service life, which can be selected according to specific road conditions and safety needs.
Three-wave guardrail refers to a guardrail structure with a three-wave cross-section. Compared with the two-wave guardrail, the three-wave guardrail has better structural strength and impact resistance, so it is more suitable for high-risk areas such as highways and mountain roads. The common thickness of the three-wave guardrail is generally 3.0mm and 4.0mm, which can meet the safety needs of most high-risk roads.
In addition to the shape and thickness, the size of the corrugated guardrail is also an important basis for classification. The width of the two-wave guardrail is generally 310mm, the width of the three-wave guardrail is 506mm, the standard board length is usually 4320mm, and the wave height is 85mm. In some sections that need to be strengthened or the road curve is large, the length of 2320mm, 3320mm or other lengths will be used, and the development of these sizes will help to ensure the uniformity and interchangeability of the corrugated guardrail during production and installation, and improve the overall performance of road safety facilities.
Corrugated guardrails can also be classified according to the crash avoidance level. According to the different collision avoidance capabilities, the corrugated guardrail can be mainly divided into four grades: A, B, C and S. Different grades of corrugated guardrails are different in structural design, material selection and manufacturing process to adapt to different road environments and safety needs.
Ordinary first-class highways, such as national highways and provincial highways, have higher requirements for the collision resistance of corrugated guardrails due to their fast speed and large traffic flow. Therefore, Class A corrugated guardrails are usually used for these roads to ensure driving safety.
On rural roads such as county and township roads, the speed is relatively slow and the traffic flow is small, and the requirements for the collision resistance of the corrugated guardrail are relatively low. As a result, these roads can be equipped with Class B or C corrugated guardrails, which meet safety requirements and reduce costs.
For high-risk areas such as highways and mountain roads, due to the complex terrain, fast speed and large traffic flow, the anti-collision ability of the corrugated guardrail is extremely high. Therefore, S-class corrugated guardrails are often used on these roads to ensure effective protection of driving safety even in extreme situations.
To sum up, the classification method of corrugated guardrails covers many aspects such as shape, thickness, standard size and crash level. In practical application, the appropriate type and specification of corrugated guardrail should be selected according to the comprehensive consideration of factors such as road environment, safety requirements and cost budget.