Reinforced Stabilizing Strip Cord Embedding for Stress Transmission
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Solution Overview
Problem
Existing reinforced stabilizing strips in earth structures face issues with stress transmission due to fiber sliding, which reduces tensile strength and cohesion between the strip and the backfill.
Innovation Solution
A reinforced stabilizing strip with a longitudinal part embedded with a high-tensile-strength cord, such as a twisted or braided assembly of fibers, enhances internal cohesion and anchoring, and can include polymer-based materials with lateral protrusions for improved friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If parallel bundles of strands of yarn are used as internal reinforcements, then the strip can be manufactured easily, but fiber sliding occurs which reduces stress transmission efficiency
Solution Approach 1:
The patent combines polymer matrix material with embedded cords or ropes made of textile, synthetic, plastic or metal materials. This composite structure integrates the ease of polymer manufacturing with the high strength and anti-slip properties of cord reinforcements, resolving the contradiction between ease of manufacture and stress transmission reliability.
Solution Approach 2:
The patent embeds cords or ropes at specific locations within the polymer strip to provide localized reinforcement. This allows the strip to maintain overall ease of manufacture while having specific high-strength zones that prevent fiber sliding and improve stress transmission where needed.
2Device complexity
If parallel fibres are arranged in the bulk of the strip, then the strip structure is simple, but sliding between fibres and between fibre groups and the strip occurs
Solution Approach 1:
The patent creates a composite structure where cords or ropes are embedded within the polymer bulk. This maintains the simplicity of the single-piece strip structure while dramatically improving tensile strength and preventing sliding through the cord reinforcement.
Solution Approach 2:
The cords or ropes act as intermediary elements between the polymer matrix and the external loads. They mediate the stress transfer, preventing direct sliding between polymer fibres and the strip structure, thereby enhancing tensile strength without complicating the overall structure.
3Strength
If high tensile strength is achieved through parallel fibre arrangement, then stress transmission along the strip is improved, but internal cohesion between fibres is insufficient
Solution Approach 1:
The patent uses composite materials where cords or ropes with inherent internal cohesion (through twisting or braiding) are embedded in the polymer matrix. This transfers the internal cohesion requirement from the polymer fibres themselves to the cord structure, maintaining high tensile strength while improving internal stability.
Solution Approach 2:
The patent embeds cords or ropes (which themselves contain nested fibres or strands) within the polymer strip. This nested structure provides multiple levels of internal cohesion - the cord structure maintains its own integrity while being embedded in the polymer matrix, thereby enhancing overall internal cohesion.
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 solution effectively transmits forces along the strip's length with reduced risk of sliding, enhancing tensile strength and shear resistance in reinforced earth structures.
Implementation Method 1
The strip must therefore have a sufficient surface area to develop, through friction, the required shear strength per unit of length
Implementation Method 2
the thrust stress of the ground being taken up by the friction between the earth and the reinforcements
Data Source
AI summary
Reinforced stabilizing strip (10) intended for use in reinforced earth structures, comprising a longitudinal part (12), said longitudinal part (12) comprising along at least part of its length, at least one cord (14) arranged approximately longitudinally and encased in the bulk of said longitudinal part.