Prefabricated Wall with Exposed Rebar Connections
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Solution Overview
Problem
Existing prefabricated building technologies face issues with indirect force transmission, complex structural parts at the foot of the wall, and difficulty in ensuring connection quality due to hidden grouting sleeves and high requirements for grouting technology, leading to reduced ductility and bearing capacity.
Innovation Solution
A prefabricated wall design featuring a concrete main body with a rigid framework of vertical ribs and exposed mechanical connecting parts at the ends, allowing for direct force transmission and visible connection quality, eliminating the need for embedded parts and grouting holes, which simplifies the structure and enhances stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If grouting sleeve and grouting technology are used for connection, then assembly capability is achieved, but force transmission becomes indirect and wall structure becomes complex
Solution Approach 1:
The invention extracts and removes the grouting sleeve from the wall structure, replacing it with a simplified connection approach where steel bars directly extend from one wall to another, eliminating the need for embedded grouting sleeves and their associated complexity
Solution Approach 2:
Instead of embedding connection elements within the wall (grouting sleeve inside concrete), the invention inverts the approach by having connection elements (steel bars) extend outward from the wall, making the connection direct and visible rather than hidden and indirect
2Reliability
If grouting sleeve is embedded in wall, then connection is achieved, but quality inspection becomes difficult and hidden dangers arise
Solution Approach 1:
The invention extracts the grouting sleeve from the embedded position and removes it entirely, replacing it with exposed steel bar connections that can be directly observed and inspected, eliminating the hidden quality issues associated with embedded grouting
Solution Approach 2:
The invention makes the connection elements visible and observable (like changing from hidden to visible), allowing quality inspection personnel to directly see the steel bar connections and grouting quality without needing to infer from hidden embedded elements
3Ease of manufacture
If grouting holes and air outlets are provided on grouting sleeve, then grouting can be performed, but wall bottom area becomes weak and ductility decreases
Solution Approach 1:
The invention extracts and removes the grouting sleeve entirely, eliminating the need for grouting holes and air outlets on the sleeve, thereby preserving the integrity and strength of the wall bottom area
Solution Approach 2:
Instead of providing holes and outlets in the wall structure to enable grouting, the invention inverts the approach by using exposed steel bar connections that require no such openings, maintaining wall integrity while achieving connection functionality
Data Source
AI summary
A prefabricated wall for a prefabricated building includes a concrete body and a rigid framework arranged inside the poured concrete body, the rigid framework comprises n longitudinally extending vertical rebars, with n being an integer greater than or equal to three; an upper end face and a lower end face of the prefabricated wall are formed with m mechanical connection portions at positions sharing the same axes as the vertical rebars, with m being an integer less than or equal to 2n; and the mechanical connection portions are all formed at end portions of the vertical rebars. An assembly structure for a prefabricated building is further provided. The assembly structure is formed by filling an assembly gap with an on-site poured layer after rebars are firmly connected at an overhead region between an upper-layer wall, a lower-layer wall and a floor slab by means of fastening components.