Concrete Crash Barrier Wall Element with Protective Layer
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Solution Overview
Problem
Guide wall elements, particularly those made of concrete, face issues where parts can detach during collisions, posing risks to road users and structures due to inadequate reinforcement and potential splintering, especially on the side wall opposite the impact area.
Innovation Solution
A protective layer, comprising materials like metallic grids, woven fabrics, or nets, is strategically applied to the side wall facing away from the traffic area, loosely arranged or embedded at least partially below the surface to prevent detachment of concrete parts, with optional attachment at edges and between edges for added stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective layer is applied to the entire surface of the guide wall element, then the protection against part detachment is improved, but the cost and complexity of the solution increases
Solution Approach 1:
The protective layer is applied selectively only to the side wall facing away from traffic (and optionally the end walls), rather than the entire surface. This local application targets the specific areas where part detachment occurs during collisions, providing necessary protection while reducing material costs, application complexity, and visual clutter on the traffic-facing side.
2Strength
If metallic reinforcement is positioned closer to the surface to prevent chipping, then the surface strength is improved, but corrosion protection is compromised
Solution Approach 1:
The protective layer acts as an intermediary between the concrete surface and the environment. It can be applied over the metallic reinforcement regardless of its position, providing both corrosion protection (by isolating the metal from moisture and oxygen) and chip resistance (by forming a protective skin). This mediator allows the reinforcement to be positioned optimally for structural performance without compromising corrosion protection.
3Illumination intensity
If the protective layer is arranged loosely on the surface, then the visibility and information carrier functionality are improved, but the retention of detaching parts may be reduced
Solution Approach 1:
The protective layer is arranged loosely on the surface in areas where visibility is critical (such as the side wall facing away from traffic), allowing it to function as an information carrier with high visibility. At the same time, it provides sufficient retention strength through its inherent tensile properties to hold detaching concrete parts, even without complete surface adhesion. The loose arrangement prioritizes optical functionality while maintaining adequate safety performance.
Data Source
Figure 1~4
AI summary
Crash barrier element (1) comprising a main body that is preferably made of concrete and has two end walls (7) and side walls (4, 5); coupling elements are arranged on the end walls (7) for connection to adjoining crash barrier elements (1). On at least one side wall (5), a protective layer (6) is disposed at least in subareas of the surface (11) of the main body.