Sheathing Retaining Cap with Split Tubular Body
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Solution Overview
Problem
Conventional dead-end anchorages in post-tension systems face challenges in preventing the shrinkage of sheathing over tendons, which leads to liquid intrusion and requires additional sealing components, increasing costs and installation complexity.
Innovation Solution
A sheathing retaining clip with a tubular body featuring a longitudinal split, radially extending fins, and locking ribs is used to compressively engage the sheathing, accommodating inconsistent curvature and resisting shrinkage forces, thereby eliminating the need for additional sealing tubes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional dead-end anchorages are used without additional sealing components, then installation is simpler and costs are lower, but sheathing shrinkage leads to liquid intrusion
Solution Approach 1:
The patent combines the sheathing retention function and the sealing function into a single integrated retaining cap structure. The cap simultaneously prevents sheathing shrinkage and blocks liquid intrusion paths, eliminating the need for separate sealing tubes or components while maintaining both reliability and simplicity
2Reliability
If additional sealing tubes are added to prevent liquid intrusion, then reliability improves, but installation complexity and costs increase
Solution Approach 1:
The retaining cap integrates multiple functions including sheathing retention, sealing, and liquid barrier properties into a single component. This merger eliminates the need for separate sealing tubes, reducing the number of installation steps and maintaining ease of operation while improving sealing reliability
3Adaptability or versatility
If a tubular body with longitudinal split is used to engage sheathing, then adaptability to inconsistent curvature improves, but manufacturing complexity increases
Solution Approach 1:
The tubular body is designed with a longitudinal split that divides the continuous tube into two flexible halves. This segmentation allows each half to independently conform to the inconsistent curvature of the sheathing while maintaining structural integrity, providing adaptability without requiring complex multi-part assemblies
Solution Approach 2:
The retaining cap utilizes elastomeric material properties that allow it to deform and adapt to varying sheathing curvatures. The material's elasticity and flexibility enable the cap to accommodate dimensional variations in the sheathing while maintaining effective engagement, achieving adaptability through material parameter selection rather than complex geometry
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 prevents sheathing shrinkage and liquid intrusion, simplifies installation, reduces costs, and ensures reliable engagement with the tendon, addressing the limitations of existing technologies.
Implementation Method 1
The sheathing retaining clip is made of a compressible polymeric material that allows the inconsistent curvature of the sheathing to be accommodated
Data Source
AI summary
An article for engaging a sheathing of a sheathed portion of a tendon has a tubular body having an inner surface and outer surface and a first end and a second end, fins extending radially outwardly from the outer surface, a longitudinal split extending through a wall of the tubular body and extending from the first end to the second end, locking ribs extending radially inwardly from the inner surface of the tubular body, and a collar formed adjacent the second end of said tubular body. Each of the locking ribs extends parallel to the other locking ribs. The locking ribs are equally spaced along the inner surface of the tubular body. Each of the fins extends parallel to the other fins. Each of the fins have a height increasing from the first end to the second end of the tubular body.