Single-wave beam guardrail plate and single-wave beam steel guardrail

A single-wave beam guardrail plate, comprising a guardrail plate body integrally formed by rolling, and two energy-accumulating rings which have the same structure and are symmetrically disposed in an axial direction at an upper edge and a lower edge of the guardrail plate body, wherein

• a cross section of the guardrail plate body is in the shape of an arc;
• the two energy-accumulating rings are formed by the upper edge and the lower edge of the guardrail plate body being curled inwardly and spirally toward a convex direction of the guardrail plate body, respectively;
• each of the two energy-accumulating rings is of a pipe-in-pipe structure in which a first steel pipe is rolled inside a second steel pipe and connected with an inner wall of the second steel pipe, and walls of the first steel pipe and the second steel pipe have a common section near a convex portion of the guardrail plate body;
• and
• the single-wave beam guardrail plate comprises a plurality of guardrail plate subunits, and each guardrail plate subunit has the same structure as the single-wave beam guardrail plate.