Wedge-Based Formwork Connection for Concrete Wall Dismantling
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Solution Overview
Problem
Existing formwork systems for concrete walls are difficult to dismantle after the concrete has set, requiring complex connections that complicate the removal process.
Innovation Solution
A formwork system featuring a wedge with angled connection surfaces that allows for easy assembly and disassembly, eliminating the need for additional fastening means and enabling straightforward separation of formwork elements by pulling out the wedge, which is designed with flat surfaces and an aluminum extruded profile for stability and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hooks are used to connect formwork elements at formwork element connecting surfaces, then good connection between formwork elements is achieved, but the formwork elements become difficult to separate after concrete has set
Solution Approach 1:
The connection system is segmented into a permanent formwork element with a recess and a removable wedge element. The wedge can be independently inserted and extracted, allowing the formwork elements to remain connected during concreting but be easily separated afterward by simply removing the wedge plug.
Solution Approach 2:
The wedge acts as an intermediary connecting element between two formwork elements. It provides the necessary connection strength during the concrete pouring process, but can be easily removed afterward, facilitating quick disassembly without damaging the formwork elements or concrete structure.
2Stability of the object's composition
If multiple fastening means are used to secure formwork elements together, then stable connection is achieved, but the complexity of the system increases and handling becomes more difficult
Solution Approach 1:
Multiple fastening functions are merged into a single wedge element. The wedge simultaneously provides connection between formwork elements, maintains positioning, and ensures stability during concreting, eliminating the need for separate bolts, clips, or other fastening components.
Solution Approach 2:
The fastening function is extracted from the permanent formwork elements and embodied in a separate, removable wedge element. This allows the formwork elements themselves to remain simple and unchanged, while the complex fastening operation is handled by the standalone wedge that can be easily inserted and removed.
3Manufacturing precision
If angled connection surfaces are used to join formwork elements, then proper geometric alignment is achieved, but the dismantling process becomes more complex
Solution Approach 1:
Instead of making the formwork elements themselves complex with integrated angled connection features, the solution inverts the approach by using a simple wedge element that fits into a recess. The wedge's geometry provides the necessary angular alignment, while the formwork elements remain simple and easy to handle.
Data Source
Figure 1a~1b
Figure 2a~2c
Figure 3a~3b
AI summary
A formwork system (10) for producing a concrete wall (12), wherein the concrete of the concrete wall (12) to be produced can be filled up to a first contact surface (28) of a first formwork element (14) of the formwork system (10), wherein the first formwork element (14) has a first formwork element connection surface (60) which is inclined to the first contact surface (28), is characterized in that the formwork system (10) has a first wedge (38) with a first wedge connection surface (58) and a second wedge connection surface (62), wherein the first wedge connection surface (58) can be at least partially applied to the first formwork element connection surface (60).