Roadway Protective Wall Deflection Control via Concrete Support Element
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Solution Overview
Problem
Conventional vehicle restraint systems with unanchored protective wall elements often deflect excessively during vehicle impacts, requiring expensive anchors and complex, costly on-site anchoring processes, which are maintenance-intensive and prone to errors.
Innovation Solution
A road arrangement featuring a prefabricated protective wall system with an elongate support element made of concrete, where the support element's stop surface limits the deflection of the protective wall element, allowing it to be erected without anchoring, using in-situ concrete that is durable, low-maintenance, and easily produced on-site.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If protective wall elements are left unanchored to simplify installation and reduce costs, then ease of manufacture and installation are improved, but the protective wall elements deflect excessively during vehicle impacts, compromising safety and reliability
Solution Approach 1:
The patent introduces a support element as an intermediary component between the protective wall element and the ground. This support element provides the necessary support to limit deflection during vehicle impacts without requiring direct anchoring of the protective wall element to the ground, thus maintaining ease of installation while improving reliability
Solution Approach 2:
The system is segmented into distinct functional components: the protective wall element for safety function, the support element for structural support, and the abutment surface for positioning. This segmentation allows each component to be optimized independently, with the support element bearing the anchoring function separately from the protective wall element
2Reliability
If expensive anchors are used to prevent excessive deflection of protective wall elements, then reliability and deflection control are improved, but the cost and device complexity increase significantly
Solution Approach 1:
The support element is designed as a simple, inexpensive concrete structure that replaces expensive metal anchors. While anchors provide reusable anchoring, the concrete support element achieves the same function at lower cost and simpler construction, accepting that it may need replacement over time rather than providing lifelong service
Solution Approach 2:
The anchoring function is extracted from the protective wall element itself and transferred to a separate support element. This allows the protective wall element to remain simple and unanchored, while the support element independently provides the necessary anchoring through its concrete structure and abutment surface
3Reliability
If anchors are installed to secure protective wall elements, then deflection control is improved, but maintenance requirements and associated costs increase due to regular functionality checks and replacements
Solution Approach 1:
The concrete support element is designed as a low-maintenance alternative to metal anchors. While metal anchors require regular inspection for corrosion and functionality, the concrete structure is inherently more durable and requires minimal maintenance, accepting potential replacement over very long time periods rather than routine maintenance
4Reliability
If complex anchoring procedures are performed on site to secure protective wall elements, then deflection control and safety are improved, but the installation time and productivity are reduced
Solution Approach 1:
The support element is designed to be constructed as a simple concrete form that can be prepared in advance or constructed quickly using standard concrete pouring procedures. This preliminary preparation of the support structure eliminates the need for complex on-site anchoring operations, allowing rapid installation of the protective wall elements once the support element is in place
Data Source
Figure 1~2
Figure 3~4
AI summary
For a road arrangement (1), comprising a roadway structure (2) that forms a roadway (20) at least in some sections, wherein the roadway structure (2) has a first edge (21) at the surface on one side, said first edge substantially following a road course of the road arrangement (1), and wherein the road arrangement (1) comprises an installation surface (3) for installing prefabricated protective wall elements (6), said installation surface substantially following the course of the first edge (21) and being arranged next to the roadway (20), according to the invention, in order to reliably and cost-effectively produce and maintain the road arrangement on site and to ensure the small deflection of a protective wall element (6) installed on the installation surface, the road arrangement (1) comprises an elongated support element (4), said elongated support element (4) in particular being cast in concrete on site and arranged adjacent to a side (31) of the installation surface (3) facing away from the roadway (20), and a stop surface (41) for limiting a deflecting motion of a protective wall element (6) installed on the installation surface is formed on the support element (4).