Coiled Rebar Placement for Dome Reinforcement Without Overlaps
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Solution Overview
Problem
The formation of reinforcing mats in dome-shaped buildings using pre-cut rebar sections is labor-intensive, costly, and time-consuming due to the need for custom cutting, storage, and extensive tying, which also weakens the rebar at overlap points, requiring additional material and labor.
Innovation Solution
A method involving a coil of continuous rebar that is uncoiled and secured to the structure's interior surface while remaining connected, allowing for longer, continuous strands of rebar to be used, reducing the need for custom cutting and overlapping, and utilizing a mechanical lift and coiled-rebar dispenser system for efficient placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pre-cut rebar sections are used to form reinforcing mats, then the rebar can be easily handled and placed, but extensive tying is required which weakens the rebar and requires additional material and labor
Solution Approach 1:
The patent uses continuous rebar strands that are uncoiled from coils and fed through a dispensing system, eliminating the need to cut and tie separate rebar sections. This continuous placement maintains the full strength of the rebar throughout its length without creating weak points at connection joints.
2Ease of manufacture
If pre-cut rebar sections are used, then the rebar can be stored and tracked, but custom cutting and extensive tying are required which increases labor and time
Solution Approach 1:
The system continuously uncoils and feeds rebar from coils through a dispensing mechanism directly to the placement location, eliminating the repetitive cycles of cutting, carrying, and tying individual sections. This continuous process dramatically increases installation speed while reducing labor requirements.
Solution Approach 2:
The patent introduces a mechanical dispensing system with uncoiling and feeding mechanisms as an intermediary between the rebar coils and the placement location. This intermediary system automates the delivery process, eliminating manual cutting and positioning operations.
3Weight of moving object
If multiple pre-cut rebar sections are used, then the rebar can be transported to site, but overlapping and tying sections together increases material cost and time
Solution Approach 1:
The system uses long continuous rebar strands that can be transported in coil form and then uncoiled on-site, eliminating the need to transport, position, and connect multiple separate sections. This continuous approach eliminates overlap requirements and associated material waste while reducing assembly time.
4Manufacturing precision
If custom cut rebar lengths are used, then the rebar can be precisely fitted, but cutting and storing different lengths increases complexity and cost
Solution Approach 1:
The patent uses uniform rebar coils with standard dimensions that can be consistently handled and dispensed. This homogeneity in material form simplifies storage, handling, and placement procedures compared to managing multiple custom-cut lengths, while the dispensing system ensures precise placement through controlled uncoiling and feeding.
Data Source
AI summary
A method for fabricating or retrofitting a building, the method including: positioning a coil of rebar toward an interior surface of a structure of a building, the structure of the building at least partially bounding a chamber, uncoiling a section of rebar from the coil of rebar; and securing the uncoiled section of rebar to the interior surface of the structure while the uncoiled section of rebar remains connected to the coil of rebar.