Tie Bar Assembly Segmentation for Concrete Slab Form Removal
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Solution Overview
Problem
Existing tie bar assemblies for concrete slabs face challenges such as improper placement of tie bars, leading to undesirable stresses in the concrete, and difficulty in removing forms due to tight fits, which increases labor costs and construction time.
Innovation Solution
A tie bar assembly comprising a tie bar sleeve, a tie bar insert, and a tie bar, where the tie bar is inserted into and secured within the tie bar insert, and both are then inserted into and secured within the tie bar sleeve. This assembly is attached to a form and embedded in the concrete slabs, allowing for easier removal of the form without the need for tight fits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If holes in the form are sized to create a tight fit or interference fit to hold tie bars firmly, then proper placement of tie bars is ensured, but the form becomes difficult to remove after concrete curing
Solution Approach 1:
The tie bar assembly is divided into separate components: a tie bar, a tie bar insert, and a tie bar sleeve. The tie bar insert is placed in the sleeve before installation, allowing the form to be removed without interference from the tie bar itself, while still ensuring proper placement through the structured assembly process.
Solution Approach 2:
The tie bar insert acts as an intermediary component between the tie bar and the form. It provides a mechanism for securing the tie bar in place during concrete pouring without requiring the form to have tight fits or interference fits that would make removal difficult.
2Ease of operation
If tie bars are not held firmly in the form, then the form can be easily removed, but the tie bars can shift during concrete pouring resulting in improper placement
Solution Approach 1:
The tie bar is pre-assembled with the tie bar insert and tied bar sleeve before installation in the form. This preliminary assembly ensures proper placement and securement of the tie bar, eliminating the need for tight fits in the form while maintaining placement accuracy during concrete pouring.
3Ease of operation
If the form is cut to remove it after tight fit installation, then the form can be removed, but the form is rendered no longer useable and additional labor and material are required
Solution Approach 1:
By segmenting the tie bar assembly into separate components that can be easily separated from the form, the form can be completely removed and reused without damage. The tie bar insert and sleeve are designed to be released from the form without requiring cutting, maintaining form integrity and usability.
Data Source
AI summary
A tie bar assembly including a tie bar sleeve, a tie bar insert insertable to the tie bar sleeve, and a tie bar insertable to the tie bar insert. During construction, the tie bar is insertable into and secured in the tie bar insert. The tie bar and the tie bar insert are then insertable into and secured in the tie bar sleeve. This assembly is fastened to the form. After the first slab is poured the first tie bar and the tie bar sleeve are embedded in the first slab. The form is removed, and the second slab is then poured and encapsulates at least a portion of the remainder of the tie bar sleeve, tie bar insert, and tie bar.