Transport Anchor Asymmetric Geometry for Plug Stability
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Solution Overview
Problem
Existing transport anchor systems for precast concrete parts face issues with plug looseness and increased manufacturing costs due to complex structures, and they often require surface-based mechanical load coupling, which can lead to undesirable moments and corrosion concerns.
Innovation Solution
A transport anchor system featuring an elongate connection element with a smaller upper transverse extent than its lower end, allowing for a simple, reliable plug to seal the anchoring means within the concrete, and a coupling device positioned below the surface to prevent corrosion and reduce moment forces during transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If simple plugs are used to close the opening, then manufacturing costs are reduced, but the plugs come loose and reliability deteriorates
Solution Approach 1:
The system separates the anchoring function from the closing function. The anchoring means (threaded rod with head) remains embedded in the concrete, while the closing element (plug or cover) is a separate component that attaches to the anchoring means rather than relying on friction fit alone. This segmentation allows each component to be optimized independently for its specific function.
Solution Approach 2:
The anchoring means acts as an intermediary between the concrete structure and the closing element. Instead of the plug directly engaging with concrete, the threaded anchoring means provides a secure mechanical interface that the closing element can attach to, ensuring reliable closure without requiring complex plug designs.
2Ease of operation
If the coupling device is positioned at the surface, then access is easier, but corrosion and moment forces increase
Solution Approach 1:
The coupling device is nested within the concrete structure at a depth that balances accessibility with protection. The anchoring means extends from the surface into the concrete, allowing the coupling device to be positioned below surface level while remaining accessible through the opening. This nesting approach protects the coupling interface from environmental corrosion while maintaining practical access for loading operations.
Solution Approach 2:
The system transitions from surface-level coupling to subsurface coupling by extending the anchoring means vertically into the concrete. This dimensional change allows the coupling device to operate in a protected environment below the surface while the opening provides access along the vertical dimension, reducing moment forces by lowering the coupling point.
3Ease of manufacture
If the anchoring means has larger transverse extent at the upper end, then plug sealing is easier, but the structure becomes more complex and costly
Solution Approach 1:
The anchoring means features an asymmetric geometry with a larger transverse extent at the upper end (head portion) and a smaller extent at the lower end (embedded portion). This asymmetric design provides a broad surface area at the upper end for effective plug sealing and load distribution, while minimizing the embedded portion's cross-section to reduce concrete displacement and structural complexity.
Solution Approach 2:
The anchoring means is pre-installed and embedded in the concrete structure before the opening is closed with the plug. This preliminary action ensures that the anchoring means is already in position to provide both mechanical anchoring and a sealing surface for the plug, eliminating the need for additional sealing structures or complex post-installation modifications.
Data Source
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AI summary
The invention relates to a transport anchor system for transporting an object 1, in particular a precast concrete element, comprising an anchoring means 2 intended to remain in the object 1, and an elongated connecting element 3 for detachably connecting to the anchoring means 2 inside the object 1 for the purpose of transporting the object 1, wherein the connecting element has at its upper end a connection device 4 for detachably connecting a load-bearing device 6 for a transport means or the transport means for transporting the object 1 and at its lower end a coupling device 5 for detachably, positively locking coupling with the anchoring means 2, wherein the anchoring means 2 has a smaller transverse dimension at its upper end than at its lower end.