Flexible Shuttering Element for Reinforced Concrete Formwork
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Solution Overview
Problem
The insertion of known formwork elements into concrete sections is often difficult or impossible due to pre-installed reinforcement, which obstructs the space required for their insertion.
Innovation Solution
A flexible, reversible shuttering element made of glass fiber or carbon fiber reinforced plastic, which can be bent or rolled along its longitudinal axis to occupy minimal space, allowing easy insertion between reinforcement bars, and then unrolled and fastened for effective formwork formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If rigid formwork elements are used, then the formwork provides stable support structure, but the insertion becomes difficult or impossible when reinforcement is pre-installed
Solution Approach 1:
The patent applies a flexible shuttering element made of flexible material that can be bent and rolled up along its longitudinal axis for insertion, then unrolled and fastened to form stable formwork. This flexible shell approach allows the element to pass through narrow spaces between reinforcement bars while maintaining structural stability when deployed.
Solution Approach 2:
The shuttering element transitions from a compressed, rolled-up state during insertion to an unrolled, expanded state for formwork formation. This dynamic transformation enables the element to adapt to different spatial requirements - compact for insertion, expanded for providing stable support structure.
2Area of stationary object
If conventional formwork elements are inserted between reinforcement bars, then formwork coverage is achieved, but the pre-installed reinforcement obstructs the insertion space
Solution Approach 1:
The shuttering element is nested within the reinforcement structure during insertion. By rolling it up along its longitudinal axis, the element fits within the limited space between reinforcement bars, effectively nesting it within the existing structural framework before being unrolled to provide full formwork coverage.
Solution Approach 2:
The element is inserted in a compressed dimension (rolled up) and then deployed in an expanded dimension (unrolled). This dimensional transformation allows the same element to occupy minimal space during insertion while providing extensive formwork coverage when unrolled and fastened.
3Ease of operation
If the shuttering element is made highly flexible for easy insertion, then insertion ease improves, but the shuttering effect and structural support may be compromised
Solution Approach 1:
The shuttering element uses flexible material that maintains sufficient structural strength to provide effective formwork support while allowing easy insertion when rolled up. The flexible material is designed to withstand the required loads while accommodating the insertion process.
Solution Approach 2:
The shuttering element is made from composite materials such as glass fiber reinforced or carbon fiber reinforced plastic, which combine flexibility with sufficient strength to provide effective shuttering action while allowing easy insertion when compressed.
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
Enables easy and efficient insertion and attachment of formwork elements between reinforcement bars, facilitating the construction of reinforced concrete elements like ceilings, floors, and walls by minimizing space requirements and ensuring a strong, flexible shuttering effect.
Implementation Method 1
a web (11) made of a flexible material... which can be bent or rolled up about its longitudinal axis... can withstand the static pressure of the concrete
Implementation Method 2
the web (11) is folded over and sewn in two edge areas, so that pockets (13) are formed, into each of which a reinforcing rod (14) can be inserted
Data Source
Figure 1~2
Figure 3~5
AI summary
The method involves casting and hardening a concrete element step-by step in two sections that are connected over a concrete reinforcement. An elongate stop end panel (10) is utilized for an edge-sided formwork plank of one of the section and weared after casting of the other section. The panel is partially bent or rolled around its longitudinal axis (15) and inserted between individual elements of the concrete reinforcement in a form that is bent or rolled around the longitudinal axis. The panel is unrolled and attached to the concrete reinforcement. Independent claims are also included for the following: (1) a stop end panel for manufacturing a reinforced, slab-like concrete element (2) an application of a stop end panel as a weared stop end panel between step-wise manufactured sections of a reinforced, slab-like concrete element.