Permanent Formwork Wall Rigid Connecting Means
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Solution Overview
Problem
Existing methods for connecting lost formwork walls are cumbersome, requiring complex management and installation of connecting means, often hindered by wall dimensions, thickness variations, and obstacles, and fail to provide adequate mechanical resistance to forces.
Innovation Solution
A lost formwork wall design featuring a rigid connecting means that moves between retracted and deployed positions, secured by a flexible element with a fixed and movable portion, allowing for mechanical connection between walls while accommodating obstacles and ensuring resistance to forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rigid connecting means are introduced inside the internal volume of two juxtaposed walls, then connection between walls is achieved, but management complexity and installation difficulty increase significantly
Solution Approach 1:
The rigid connecting means is designed to be movable between a retracted position (stored inside the wall during transport) and a deployed position (extending outward to connect with the adjacent wall). This dynamic configuration allows the connection system to adapt between storage and operational states, reducing management complexity while maintaining connection reliability.
2Reliability
If connecting means are installed inside walls, then wall connection is enabled, but installation becomes difficult or impossible due to wall dimensions, thickness variations, and obstacles
Solution Approach 1:
The rigid connecting means is pre-assembled and pre-positioned on the wall during manufacturing, in a retracted state. This preliminary action eliminates the need for complex on-site installation operations, as the connection system is already in place and only requires deployment (moving from retracted to extended position) during wall assembly, significantly improving installation ease while maintaining connection stability.
3Reliability
If rigid connecting means extend outside the wall, then connection with adjacent walls is improved, but access to the means becomes difficult due to obstacles in the path
Solution Approach 1:
The rigid connecting means is designed to be movable between retracted and deployed positions. During installation or maintenance, it can be retracted inside the wall to provide clear access to the wall surface and eliminate obstacles in the path. When connection is needed, it is deployed outward to provide the necessary mechanical resistance. This dynamic positioning resolves the contradiction between providing external connection capability and maintaining access ease.
4Adaptability or versatility
If flexible elements are used to secure rigid connecting means, then movement between positions is enabled, but the system becomes more complex
Solution Approach 1:
The mounting system uses flexible elements (such as flexible straps or bands) to secure the rigid connecting means to the wall. These flexible elements allow the rigid means to move between retracted and deployed positions while maintaining secure attachment. The flexibility provides position adaptability without requiring complex mechanical joints, motors, or control systems, thus limiting the increase in device complexity to a simple, elegant solution.
Data Source
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AI summary
The invention relates to a permanent formwork wall (1): - comprising: - two spaced skins (2; 3) and an internal volume (5); - a means (6) for connecting these skins (2; 3); - a rigid means (7) for connecting this wall (1) to another juxtaposed wall (1'), such rigid connecting means (7) being movable between a retracted position and a deployed position; - means (8) for mounting such rigid connecting means (7) in a movable manner relative to the skins (2; 3). This wall is characterized in that the mounting means (8) comprise, on the one hand, at least one flexible element (9) having a fixed portion (90) and a movable portion (91) and, on the other hand, at least one means (11) for permanently attaching such rigid connecting means (7) to the movable portion (91).