Multi-section Formwork Element for Construction Joint Sealing
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Solution Overview
Problem
Existing formwork elements for construction joints are difficult to handle and fail to effectively prevent concrete from passing through, leading to instability and poor sealing.
Innovation Solution
A multi-part formwork system with detachably connected lower and upper parts that come into contact with a joint tape, using brackets with lateral and vertical legs and a connecting element, and fastened with joint tape clamps and tie wire to ensure secure and tensioned attachment, preventing concrete leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the formwork parts are brought up to the joint tape to improve sealing, then the sealing against concrete running through is improved, but the formwork elements become difficult to handle and unstable
Solution Approach 1:
The formwork is divided into separate upper and lower parts that can be independently positioned and then connected. This segmentation allows each part to be handled separately for ease of operation, while still achieving the sealing function when assembled together with the joint tape between them.
Solution Approach 2:
The joint tape acts as an intermediary element between the upper and lower formwork parts. It fills the gap and provides the sealing function against concrete running through, while allowing the formwork parts to remain at a manageable distance for easy handling and assembly.
2Ease of operation
If a space remains between the formwork parts and the joint tape to improve ease of handling, then the ease of operation is improved, but concrete can pass through the gap
Solution Approach 1:
The joint tape serves as a mediator that fills the necessary space between the formwork parts. It maintains the gap needed for easy handling and assembly while simultaneously providing the sealing function to prevent concrete from passing through.
Solution Approach 2:
The joint tape provides localized sealing quality at the construction joint area. It concentrates the sealing function precisely where needed (at the joint between concrete sections) while allowing the rest of the formwork to maintain spacing for ease of operation.
3Reliability
If the formwork elements are made unstable to bring them up to the joint tape, then the sealing is improved, but the stability and workability on construction site deteriorate
Solution Approach 1:
Dividing the formwork into separate upper and lower parts with a joint tape intermediary allows the system to achieve stability in its assembled state while maintaining workability during assembly. The segmented design enables controlled positioning without requiring the entire structure to be unstable.
Data Source
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AI summary
The multi-piece framework is provided with a lower part (1), and an upper part (2), where the upper part and the lower part are connected together in detachable manner, such that an area is arranged between the upper part and the lower part for supporting a joint tape. The lower part comprises lower bracket (5) extending transverse to both sides of the construction joint. The joint strip (3) is mounted at the lower or the upper bracket by clamping with the help of mounting units and the lower framework unit (6). The upper framework unit stays in contact with the joint strip.