Terminal ends of highway corrugated guardrail panels mostly adopt round head type or ground anchor type. The starting point of the guardrail and the standard guardrail are connected by a gradient section. The gradient section is generally designed in a parabolic shape. The position of the columns gradually moves outward. The height of the columns remains unchanged. The distance between the columns is increased to 2m near the end. A concrete foundation is used and cable end anchors are added. This treatment method is called end diagonal expansion. The end beam has a round head.
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