Adjustable Form Panel Marginal Wall for Uneven Surface Sealing
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Solution Overview
Problem
Existing methods for creating a marginal wall between form panels and uneven tunnel surfaces are time-consuming and labor-intensive, typically requiring manual assembly of wooden boards with nails or screws.
Innovation Solution
A modular marginal wall system with movable fingers attached to a form panel, featuring an actuation mechanism that allows for adjustable and variable sizing to fit uneven surfaces, using hydraulic cylinders or manual cranks for operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual assembly of wooden boards is used to create marginal walls, then the marginal barrier can be formed between form panels and uneven surfaces, but the process becomes very time-consuming and labor-intensive
Solution Approach 1:
The marginal wall system employs movable fingers that can be adjusted to different positions along the form panel edge, allowing the barrier to adapt to uneven tunnel surfaces. The fingers can be extended or retracted as needed, providing dynamic adaptability without requiring manual assembly of fixed wooden boards.
Solution Approach 2:
The marginal wall is divided into multiple separate fingers rather than a single rigid structure. This segmentation allows each finger to be independently positioned and adjusted to match the contours of uneven surfaces, while the modular nature enables rapid deployment compared to traditional wooden board assembly.
2Device complexity
If fixed wooden boards are used for marginal walls, then the structure is simple, but it cannot adapt to variable gap sizes between form panels and uneven surfaces
Solution Approach 1:
The system transitions from fixed wooden boards to movable fingers that can be adjusted along the form panel edge. Each finger can be positioned at different locations to accommodate variable gap sizes caused by uneven surfaces, providing adaptability while maintaining relative structural simplicity.
Solution Approach 2:
The position of the fingers along the form panel edge can be changed to adapt to different gap sizes. By varying the position parameter of the fingers, the system can accommodate uneven surfaces without requiring complex structural modifications.
3Ease of manufacture
If multiple workers manually assemble wooden boards one by one, then the marginal wall can be constructed, but it requires several workers to work many hours
Solution Approach 1:
The fingers are pre-positioned on the form panel at appropriate locations before the concrete pouring operation. This preliminary arrangement eliminates the need for workers to manually assemble wooden boards during the critical construction phase, significantly reducing assembly time and labor requirements.
Solution Approach 2:
The adjustable finger system serves multiple functions: it creates the marginal barrier, adapts to uneven surfaces, and can be reused across different form panel assemblies. This multi-functionality replaces the need for custom wooden board assembly for each specific application.
Data Source
AI summary
A form panel with a marginal wall for casting castable material, which has an edge to be positioned near an external surface and a fixed support for attachment to the form panel, fingers movably carried by the fixed support and movable relative to the edge of the form panel between an extracted and retracted position. The fingers extending beyond the edge of the form panel edge in their extracted position, the fingers having a load-bearing surface for retaining castable material slurry, and an actuation mechanism for moving the fingers between the positions. The fingers are movably carried by the fixed support such that at least some of the fingers are movable with respect to the others for forming a marginal barrier between the edge of the form panel and the external surface.


