Pre-assembled Bar Combinations for Column Top Beam Construction
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Solution Overview
Problem
Conventional methods for forming beams in confined spaces, such as at the tops of columns, are inconvenient and pose safety risks due to limited access for workers to fasten stirrups effectively.
Innovation Solution
The method involves pre-assembling bar combinations with extended connection sections, hoisting them between columns, and connecting adjacent combinations to simplify the process, reduce deflection, and enhance safety by eliminating the need for moldboards during hoisting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If workers assemble reinforcement cages at the tops of columns using conventional methods, then beams can be formed in confined spaces, but worker safety is compromised and the fastening process becomes inconvenient due to limited access
Solution Approach 1:
The reinforcement cages are pre-assembled on the ground with all stirrups fastened before hoisting to the column tops. This preliminary assembly eliminates the need for workers to perform fastening operations at high altitudes, thereby resolving both the convenience and safety issues associated with on-site assembly in confined spaces
2Strength
If reinforcement cages are assembled on-site at column tops, then structural integrity can be achieved, but the construction process becomes time-consuming and labor-intensive
Solution Approach 1:
Reinforcement cages are completely assembled including all stirrup fastening operations before hoisting to the construction site. This pre-assembly approach maintains structural integrity while dramatically improving construction speed by eliminating time-consuming on-site assembly operations
Solution Approach 2:
The construction process is divided into separate stages: ground-based pre-assembly of reinforcement cages, hoisting of pre-assembled cages to column tops, and final concrete pouring. This segmentation allows each stage to be optimized independently, improving overall productivity while maintaining quality
3Stability of the object's composition
If moldboards are used during hoisting of bar combinations, then bars can be supported during transport, but the process becomes more complex and time-consuming
Solution Approach 1:
The moldboards traditionally used to support bars during hoisting are completely removed from the process. Instead, the bar combinations are designed with inherent stability through proper reinforcement cage assembly, eliminating the need for additional supporting devices and simplifying the hoisting process
Data Source
AI summary
A method for forming a plurality of beams connected in series is provided. The method comprises the following steps: providing a plurality of columns; providing a plurality of pre-assembled bar combinations, wherein each of the plurality of pre-assembled bar combinations comprises a plurality of lower main bars and a plurality of lower stirrups, and at least one end of the plurality of the lower main bars has connection sections extending beyond the plurality of lower stirrups; hoisting each of the bar combinations so that the two ends thereof are placed on top of two adjacent columns of the plurality of columns and the connection sections of the plurality of lower main bars of adjacent plurality of bar combinations overlap; and connecting the plurality of connection sections of the plurality of lower main bars of the adjacent plurality of bar combinations.