Expansion Joint Seal Depth Control via Adjustable Installation Member
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing expansion joint seal systems face challenges in maintaining the correct depth and flexibility to accommodate temperature changes, mechanical shear, and directional movements, leading to premature failure and the need for frequent reinstallation due to inadequate support and adhesion issues.
Innovation Solution
A system comprising a flexible and resilient installation member with a hanger design, including a lip and ledge, that provides adjustable support and can be reused or replaced, combined with a base member for secure anchorage, allowing for controlled depth and multi-directional movement, and featuring a water retarding layer and fire retarding layer with optional sensors for monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the seal is recessed too far below the surface, then it may accumulate debris or standing water, but if it is insufficiently recessed, it may be damaged by surface contacts
Solution Approach 1:
The system enables adjustment of the seal's recessed depth as a variable parameter. The installation member includes a ledge at a controlled distance from the substrate surface, allowing the seal to be positioned at an optimal depth that balances protection from surface damage with prevention of debris accumulation. This adjustable depth parameter resolves the contradiction by finding the optimal position rather than using fixed extreme positions.
2Ease of operation
If backer bars are driven into the gap between substrates, then they provide support, but they may move during installation or prevent proper material imposition
Solution Approach 1:
The installation member acts as an intermediary device between the substrates and the seal material. It includes a body that spans the gap between substrates and a ledge that provides a stable support surface for the seal. This intermediary structure eliminates the need to drive backer bars into substrates, providing both installation support and precise material placement without the drawbacks of traditional backer bars.
3Ease of manufacture
If the seal is installed without depth control, then installation is simpler, but the seal may shift while the adhesive cures or the expansion joint expands
Solution Approach 1:
The installation member is pre-configured with a ledge at a specific distance from the substrate surface before installation. This preliminary positioning structure provides automatic depth control during installation, ensuring the seal is placed at the correct depth without requiring complex measurement or adjustment procedures. The ledge physically prevents the seal from shifting during adhesive curing or expansion joint movement, resolving both simplicity and stability requirements.
4Device complexity
If traditional seals are used without replacement capability, then initial installation is straightforward, but replacement becomes problematic when the seal fails
Solution Approach 1:
The system separates the seal from the support structure (installation member). The installation member remains permanently installed and provides ongoing support, while the seal can be independently removed and replaced. This segmentation allows straightforward initial installation and enables easy future replacement of the seal without removing the entire assembly, resolving both installation simplicity and replacement ease.
Data Source
AI summary
An expansion joint seal system for supporting an expansion joint seal. The system includes an installation member and a base member.