Structural Cable Shield Assembly With Clamped Interface Zones

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Solution Overview

Problem

Existing protective shields for tensioning members in construction, such as suspension cables, face issues with weak junctions between cylindrical segments, requiring improved strength, durability, and ease of assembly and disassembly, particularly in the face of threats like explosions and mechanical aggression.

Innovation Solution

A shield system comprising two protective elements with clamping forces applied through interface zones, using bayonet couplings, rods, and locking members to secure shells together, and filled with cement and auxetic materials for enhanced resistance and drainage channels to prevent damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If protective shields are divided into longitudinal cylindrical segments to facilitate installation and maintenance, then ease of operation is improved, but the junctions between segments become weak points that reduce reliability

Engineering Contradiction:

Improveease of installation and maintenanceVSAvoidstrength of junctions between segments

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The protective shield is divided into longitudinal cylindrical segments that can be independently installed and maintained. Each segment is separated by expansion joints that allow for thermal movement and facilitate installation without requiring the entire shield to be installed as one piece.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The expansion joints are constructed using composite materials including elastomeric bearing layers, steel shims, and concrete. This composite structure provides both flexibility to accommodate movement and sufficient strength to maintain reliability at the junctions between segments.

Inventive Principle:

Principle #40Composite materials

2Adaptability or versatility

If shields consist of multiple cylindrical sectors assembled after cable installation to enable removable protection, then adaptability is improved, but the assembly complexity increases

Engineering Contradiction:

Improveremovable protection capabilityVSAvoidassembly complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The shield is segmented into multiple cylindrical sections that can be assembled around the cable in situ. Each segment can be independently positioned and secured, allowing for flexible installation around existing cable structures and enabling removal when needed for maintenance or inspection.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The expansion joints incorporate movable components including elastomeric bearings and steel shims that allow the segments to move relative to each other. This dynamic design accommodates thermal expansion and contraction while maintaining structural integrity, simplifying the assembly process compared to rigid fixed joints.

Inventive Principle:

Principle #15Dynamics

3Reliability

If expansion joints are provided between segments to accommodate thermal movement, then reliability is improved, but device complexity increases

Engineering Contradiction:

Improveaccommodation of thermal movementVSAvoidcomplexity of expansion joint structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The expansion joints utilize elastomeric bearing layers and flexible steel shims to accommodate thermal movement between segments. These flexible components naturally deform to absorb expansion and contraction forces without requiring complex mechanical adjustment mechanisms, maintaining reliability while controlling structural complexity.

Inventive Principle:

Principle #30Flexible shells and thin films

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 system provides robust protection against threats by maintaining structural integrity and facilitating easy assembly/disassembly, while ensuring resistance to shockwaves and enhancing durability through clamping forces and drainage channels.

Implementation Method 1

a filling (14) in a radial gap between the first shell (11) and the second shell (12)... resistance to shockwaves

Methodology Applied

Scientific EffectCompression resistance: Compression

Implementation Method 2

a system for assembling the protective elements configured to exert a clamping force on the protective elements urging one toward the other

Methodology Applied

Scientific EffectClamping force: Mechanical Force

Implementation Method 3

a water drainage channel is formed in the interface zone between the two protective elements

Methodology Applied

Scientific EffectGravity-driven drainage: Gravitation

Data Source

PatentUS20250382756A1Structural cable with protective shield, and construction work comprising such a cable

Publication Date: 2025.12.18 SOLETANCHE FREYSSINET SAS

AI summary

A protective shield includes two protective elements extending in parallel with the tensioning member and a system for assembling the protective elements around an axial passage for the tensioning member. Each protective element has a first shell adjacent to the axial passage, a second shell, and a filling in a radial gap between the first and second shells. The protective elements have between them two interface zones, diametrically opposed with respect to the axial passage. The assembly system of the protective elements is configured to apply a force that presses the protective elements against each other in the two interface zones.