Foundation Anchor Box with Linear Force Rods
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Solution Overview
Problem
Existing foundation anchoring systems for large-scale machines in concrete foundations face challenges with force deflection, high handling and transport costs, and the need for precise alignment, which can lead to bending stresses and failure during accidental loads, while also requiring careful prefabrication and welding, limiting on-site installation and tolerance compensation.
Innovation Solution
A foundation anchorage system featuring an anchor box with anchor rods connected via sleeves, allowing for prefabrication and on-site assembly, ensuring linear force transmission without deflection, and incorporating a symmetrical arrangement and adjustable recesses to reduce stress and facilitate tolerance compensation, with anchor rods made of prestressing steel for enhanced load-bearing capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If side plates and cross members are used to transmit forces, then force transmission capability is improved, but bending stresses occur in the attachment area leading to potential failure
Solution Approach 1:
The foundation anchorage is divided into separate functional components: an anchor box for force distribution and multiple anchor rods for force transmission. This segmentation eliminates the need for welded cross members and side plates, thereby avoiding bending stresses in attachment areas while maintaining effective force transmission to the concrete foundation.
2Manufacturing precision
If tie rods are prefabricated with anchor box, then force transmission alignment is improved, but handling and transport costs increase significantly
Solution Approach 1:
The anchor box and anchor rods are manufactured and supplied as separate components. The anchor box is embedded in the concrete foundation first, and the anchor rods are inserted into the anchor box later. This segmentation allows each component to be optimized independently and simplifies handling and transport, while the design ensures proper alignment through the anchor box geometry and recess features.
Solution Approach 2:
The anchor box serves as an intermediary component that receives forces from the machine foundation and distributes them to multiple anchor rods. It provides a standardized interface that simplifies connection while ensuring proper force distribution, eliminating the need for precise prefabrication alignment between tie rods and support structures.
3Productivity
If precise alignment of anchor box and tie rods is required, then force transmission efficiency is improved, but installation complexity and technical effort increase
Solution Approach 1:
The anchor box features asymmetric recesses on its sides that are specifically shaped and positioned to receive the anchor rods. This asymmetric design guides the anchor rods into the correct orientation and position during installation, automatically achieving proper alignment without requiring complex measurement and adjustment procedures. The recess geometry ensures that forces are transmitted efficiently along the longitudinal extension axis of the anchor rods.
4Strength
If welding is used to connect anchor box and tie rods, then connection strength is improved, but on-site installation becomes impossible requiring prefabrication
Solution Approach 1:
The welding connection is replaced with a mechanical insertion system. The anchor rods are inserted into recesses in the anchor box and secured through mechanical means (such as threading or friction fit) rather than welding. This substitution allows the entire assembly to be installed on-site without requiring welding equipment or skilled welders, while still achieving sufficient connection strength to transmit accidental loads effectively.
Data Source
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AI summary
The invention relates to a foundation anchor (1) for force-fittingly anchoring an industrial-scale machine (100) in a concrete foundation (2), comprising an anchor casing (10) that has at least one lateral wall (11), and a plurality of anchor rods (20) that are attached to the anchor casing (10), said anchor casing (10) comprising a securing section (30) for securing the industrial-scale machine (100) by means of securing bolts (110), and the anchor rods (20) being connected to the at least one lateral wall (11) such that forces are introduced from the at least one wall (11) into the plurality of anchor rods (20) in a substantially linear manner along the longitudinal extension axis of said anchor rods (20).