Prefabricated Reinforcement Cage for Large-Space Building Construction
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Solution Overview
Problem
Existing reinforced concrete structures face challenges in manual reinforcement processes, including high safety risks, low efficiency, precision issues, and quality defects due to manual handling of reinforcement bars, especially at heights, and complex node connections, which affect the strength and stability of the structure. Additionally, the assembly of large prefabricated members is cumbersome and costly, with high technical requirements for grouting and connection methods that do not always meet current design specifications.
Innovation Solution
A prefabricated combined reinforcement cage member system is used, comprising vertical, girder, and slab reinforcement cage members with dismantle free moulds and reinforcement meshes, allowing for industrial production and assembly of large-scale members that can be easily transported and lifted, reducing on-site manual labor and improving precision and efficiency. The system includes a freestanding external envelope structure with preassembled components for simplified installation and enhanced structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual reinforcement is used after erecting templates on site, then workers can conduct reinforcement operations, but safety risks increase, operation efficiency decreases, and precision control becomes difficult
Solution Approach 1:
The reinforcement cage is pre-assembled at the factory before concrete pouring, with all steel bars positioned and secured in advance. This preliminary action eliminates on-site manual reinforcement operations, ensuring precise positioning and eliminating safety risks associated with high-altitude manual work while maintaining structural quality
Solution Approach 2:
The reinforcement cage is divided into modular sections that can be pre-assembled and then connected on-site. This segmentation allows factory pre-processing of reinforcement components while enabling flexible on-site assembly, improving both safety and precision without requiring complex manual operations at height
2Productivity
If prefabricated reinforced concrete members are transported and assembled on site, then construction efficiency improves, but the self-weight of members increases, making transfer and positioning difficult
Solution Approach 1:
The large-space structure is divided into smaller modular units with standardized reinforcement cages that can be manufactured and transported more easily. These segmented units are then assembled on-site to form the complete structure, maintaining construction efficiency while reducing individual member weight and transportation difficulties
Solution Approach 2:
Reinforcement cages are pre-assembled at the factory with all steel bars positioned and secured before concrete pouring. This preliminary factory preparation reduces on-site assembly complexity and allows for optimized member design that balances preassembly benefits with transportation feasibility
3Strength
If connecting nodes of prefabricated members are reinforced artificially, then connecting strength requirements are met, but the reinforcement becomes complicated and manual workspace becomes cramped
Solution Approach 1:
Connecting nodes are pre-reinforced at the factory with steel bars positioned and secured in the reinforcement cage before concrete pouring. This preliminary factory preparation ensures connecting strength requirements are met while eliminating complex on-site reinforcement operations and cramped workspace conditions
Solution Approach 2:
The reinforcement cage design integrates connecting node reinforcement with the overall cage structure, combining multiple reinforcement functions into a unified pre-assembled unit. This merging eliminates the need for separate complex reinforcement operations at connecting nodes while ensuring structural strength
4Reliability
If vertical nodes are connected by slurry anchoring, then connection is achieved, but technical requirements increase and grouting construction becomes complicated
Solution Approach 1:
Vertical node connections are pre-prepared at the factory with reinforcement cages positioned and secured before concrete pouring. This preliminary preparation ensures connection reliability is achieved through proper reinforcement placement rather than complex post-pouring grouting operations
Solution Approach 2:
The complex grouting process is extracted and replaced by pre-assembling the reinforcement cage with proper node connections at the factory. This removes the complicated grouting construction and quality control requirements while maintaining connection reliability through factory-controlled reinforcement placement
5Strength
If horizontal nodes are connected by cast-in-place template support, welding, and high-strength bolt connection, then connection strength is achieved, but the process becomes complicated and cost increases
Solution Approach 1:
Horizontal node connections are pre-assembled at the factory with reinforcement cages positioned and secured before concrete pouring. This preliminary factory preparation achieves connection strength through proper reinforcement placement and concrete bonding, eliminating the need for complex post-pouring welding and high-strength bolt connections
Solution Approach 2:
The complex multi-step connection process (template support, welding, high-strength bolts) is extracted and replaced by a simplified factory pre-assembled reinforcement cage system. This removes unnecessary complexity while maintaining connection strength through factory-controlled reinforcement placement and concrete bonding
Data Source
AI summary
A building based on a large-space structure body and a freestanding external envelope structure and a construction method, wherein the building comprises a structure body composed of a vertical-structure reinforced concrete member, a reinforced concrete girder and a reinforced concrete slab, and a freestanding combined external envelope system externally hung in a periphery of the structure body; and the structure body is made of a prefabricated combined reinforcement cage member poured with concrete, the prefabricated combined reinforcement cage member is combined and assembled by a prefabricated vertical-structure reinforcement cage member, a prefabricated girder reinforcement cage member and a prefabricated slab reinforcement cage member, and the prefabricated vertical-structure reinforcement cage member is a prefabricated shear wall reinforcement cage member or a prefabricated column reinforcement cage member.