Point Bearing Foundation with Lateral Redans for Traction Resistance
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Solution Overview
Problem
Existing structural support foundations for heavy structures like high-voltage pylon foundations face challenges in minimizing environmental impact and resistance to traction efforts, requiring large volumes and extensive excavation, which complicates construction and increases environmental degradation.
Innovation Solution
A punctual structural support foundation design featuring a deck at the bottom of an excavation with laterally extending Redans that sink into the ground, reducing the excavation size and enhancing resistance to traction efforts while minimizing environmental impact through the use of metal materials and light heli-tensionable tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If metal foundations are used to reduce weight for helicopter transport, then weight is reduced, but resistance to traction efforts decreases
Solution Approach 1:
The invention extends the foundation resistance in the lateral dimension by adding Redans that sink laterally into the ground beyond the excavation side walls. This dimensional extension allows the metal foundation to mobilize shear resistance from a larger soil volume without increasing the foundation's own weight, thereby resolving the contradiction between weight reduction and traction resistance.
Solution Approach 2:
The Redans act as intermediary elements between the metal foundation deck and the surrounding soil. These lateral extensions mobilize the soil's shear strength as an intermediary resistance mechanism, allowing the lightweight metal foundation to achieve traction resistance equivalent to or greater than conventional foundations without concrete.
2Object-affected harmful factors
If the excavation volume is reduced to minimize environmental impact, then environmental degradation is reduced, but the foundation resistance to traction efforts becomes insufficient
Solution Approach 1:
Instead of increasing excavation volume to improve foundation resistance, the invention extends resistance laterally beyond the excavation boundaries using Redans. This allows sufficient traction resistance to be achieved with a minimized excavation footprint, directly resolving the contradiction between environmental impact and foundation strength.
Solution Approach 2:
The foundation design utilizes the in-place soil surrounding the excavation as the primary resistance mechanism. The Redans mobilize the shear strength of the existing soil without requiring additional earthmoving or imported materials, allowing the foundation to serve itself and achieve adequate resistance with minimal environmental disturbance.
3Strength
If conventional concrete foundations are used to ensure sufficient resistance, then foundation strength is adequate, but weight increases making helicopter transport impossible
Solution Approach 1:
The invention replaces permanent, heavy concrete foundations with lightweight, removable metal decking and Redan structures. These metal components can be transported by helicopter, assembled, and later removed without leaving permanent concrete structures, thereby achieving adequate foundation strength while enabling helicopter transport and site restoration.
Solution Approach 2:
The foundation system combines metal decking with soil engagement through Redans, creating a composite structure that leverages the high strength-to-weight ratio of metal and the shear resistance of soil. This composite approach eliminates the need for heavy concrete while maintaining adequate foundation resistance for traction efforts.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves significant resistance to traction and compression forces with a reduced excavation size, limiting earthmoving operations and environmental impact, and meets geotechnical and intrinsic hold requirements, as demonstrated by tests meeting relevant standards.
Implementation Method 1
the Redans make it possible to mobilize by shear the soil in place not reworked outside the volume of the excavation, to produce an effort resistant to the traction effort transmitted to the foundation by the structure
Data Source
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AI summary
The disclosed foundation providing point bearing for a structure comprises: a floor structure (16) at the bottom of an excavation (10) in the ground (12), said floor structure (16) extending laterally at the periphery (18A, 18B) towards at least one side wall (10A, 10B) of the excavation (10); a support assembly (22, 24, 26) providing point bearing for a structure, said support assembly being fastened to the floor structure (16) and extending from the bottom to the surface of the excavation (10); backfill material (28) that fills the excavation (10) to the surface. The foundation further comprises a plurality of extensions (30A, 30B) which are laterally buried in the ground (12) from the periphery (18A, 18B) of the floor structure (16), to which the extensions are fastened, beyond the at least one side wall (10A, 10B) of the excavation (10).