Precast Panel Connector Assembly With Hidden Recessed Joints
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Solution Overview
Problem
The existing methods for assembling precast concrete panels are costly and labor-intensive, requiring on-site welding or bolting and resulting in unsightly connections that can crack and compromise the aesthetic appeal of the finished structure.
Innovation Solution
A connecting device with anchoring means that fits within recesses formed in the panels during casting, allowing for the assembly of two, three, or more panels without the need for on-site welding or extensive grouting, using a formwork assembly to create voids in the panels that receive the connecting device, thereby joining them securely and aesthetically pleasingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cast-in plates are used to join precast panels together with welding or bolting, then the panels can be connected securely, but the connection becomes costly and labor-intensive requiring cherry pickers and skilled workers
Solution Approach 1:
The connecting device is pre-installed into recesses formed in the panels during the casting process, so that when panels are assembled on-site, the connection is already prepared and requires only simple insertion and engagement of the connecting pieces, eliminating the need for on-site welding or bolting operations
Solution Approach 2:
A connecting device with connecting pieces acts as an intermediary between adjacent panels, providing a mechanical connection interface that eliminates the need for direct welding or bolting between cast-in plates, thereby simplifying the assembly process while maintaining connection strength
2Strength
If cast-in plates are joined together with welding or bolting, then the panels are connected securely, but additional settable material must be used to cover the connection which is unsightly and prone to cracking
Solution Approach 1:
The connecting device is designed to be received within recesses formed in the panels, extracting the connection mechanism from the visible surface of the panels. The connecting pieces engage with the connecting device from the rear or side, keeping all connection elements hidden within the panel thickness and eliminating the need for unsightly cover material
Solution Approach 2:
The connecting device is nested within recesses formed in adjacent panels, with connecting pieces inserting into and engaging with the connecting device. This nesting arrangement conceals the entire connection mechanism within the panel assembly, maintaining a clean and aesthetically pleasing exterior surface without cracks or unsightly material
3Productivity
If connecting devices are pre-installed in recesses during casting, then assembly becomes faster and less labor-intensive, but the formwork assembly must be configured to create precise voids for receiving the connecting device
Solution Approach 1:
The formwork assembly is configured with integrated voids or cavities that are formed during the concrete casting process. These voids are precisely positioned and dimensioned to receive the connecting devices, eliminating the need for post-casting modifications and ensuring accurate alignment during panel assembly
Solution Approach 2:
The formwork assembly serves multiple functions: it forms the concrete panel, creates the recesses for the connecting device, and defines the geometry of the voids for receiving connecting pieces. This multi-functionality reduces the need for additional formwork components and simplifies the overall manufacturing process
Data Source
AI summary
Disclosed herein is a connecting device for connecting an assembly of adjacent panels, wherein the connecting device has a body comprising at least two portions, each portion having means for anchoring the connecting device into a respective recess in one of the panels of the assembly, which, when the panels are so assembled, the connecting device is receivable in a void formed by the recesses of the panels thereby joining the panels together and wherein the connecting device is configured to selectively connect an assembly of two, three or more panels.