Cranked Transport Anchor Layout for Stackable Precast Concrete
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Solution Overview
Problem
Existing transport anchors for precast concrete components often compromise stackability and stability due to protruding rope sections, which can lead to kinking, breaking, or unstable structures during storage and transport, especially for sandwich components with an offset center of gravity.
Innovation Solution
A cranked transport anchor with a bracket featuring offset eyelets allows the rope section to emerge from the precast concrete part in a way that the anchoring section is offset relative to the rope loop, ensuring load-bearing capacity without obstructing the support surface, and the rope loop is positioned above the center of gravity for improved stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a transport anchor extends from the support surface in the form of a cable section or loop, then the precast element can be transported and repositioned, but it becomes difficult or impossible to stack the precast elements efficiently without subjecting the protruding cable loop to the weight of stacked elements
Solution Approach 1:
The cable is led out of the precast element not perpendicular to the support surface but at an angle, emerging from a location offset from the vertical projection of the anchoring section. This dimensional change in cable routing allows the support surface to remain clear for stacking while maintaining transport functionality.
2Reliability
If the anchoring section is positioned directly beneath the support surface for efficient stacking, then stackability is improved, but the protruding cable loop interferes with the support surface and prevents stable stacking
Solution Approach 1:
The cable exit position is deliberately asymmetric relative to the anchoring section, with a transverse offset created by the cranked configuration. This asymmetric arrangement allows the anchoring section to remain beneath the support surface while the cable emerges at an offset location that does not interfere with stacking.
3Ease of manufacture
If a transport anchor terminates in or protrudes from an edge surface of a sandwich component, then the anchoring is simplified, but the component hangs at an angle when lifted because the anchor is not located over the center of gravity
Solution Approach 1:
The function of positioning the cable over the center of gravity is extracted from the anchoring section location and achieved separately through the cranked configuration. The anchoring section can remain simple and embedded in the edge surface, while the cable routing is adjusted to emerge at the correct position for stable transport.
Data Source
Figure 1a~1c
Figure 2a~2c
Figure 3
AI summary
The invention relates to a transport anchor for precast concrete components (20), wherein the transport anchor comprises a cable (1) with at least one anchoring section (3) to be anchored in a precast concrete component (20), and a cable loop (2) on a section of the cable (1) located away from the anchoring section (3). To create such a transport anchor, which improves the stacking capability of precast concrete components equipped with it, the invention proposes that the anchoring section (3) be cranked and arranged such that the cable section exiting the precast concrete component is offset transversely to the longitudinal direction of the cable (1) relative to the inner end of the anchoring section (3) located beyond the crank (4).