Modular Prefabricated Room Units with Semi-Prefabricated Connecting Ports
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Solution Overview
Problem
Traditional high-rise building construction methods, such as cast-in-situ concrete, result in complex and time-consuming processes, high labor costs, and significant disturbance to surrounding residents due to on-site workload and pollution.
Innovation Solution
A modular integrated building system using prefabricated room units with semi-prefabricated connecting ports and exposed reinforcing bars, where concrete occupies over 80% of the building volume, allowing for significant reduction in on-site workload through prefabrication and parallel construction of central and side regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cast-in-situ concrete construction is used for traditional high-rise buildings, then structural strength and stability are ensured, but construction period is extended and labor consumption increases
Solution Approach 1:
The building is divided into multiple prefabricated room units that are manufactured independently in factories before being assembled on-site. Each room unit includes pre-formed structural members, walls, floors, and ceilings, allowing parallel production and reducing on-site construction time while maintaining structural integrity through standardized connection designs.
Solution Approach 2:
Structural members such as beams, columns, walls, and floors are pre-formed and pre-assembled into complete room units before delivery to the construction site. This preliminary fabrication in controlled factory environments eliminates time-consuming on-site casting operations and enables faster assembly while ensuring consistent quality and structural strength.
2Stability of the object's composition
If cast-in-situ concrete construction is used, then structural integrity is maintained, but construction complexity increases and quality control becomes difficult
Solution Approach 1:
The complex building structure is segmented into standardized prefabricated room units with modular designs. Each unit follows standardized templates for structural members, connections, and finishes, simplifying the construction process while maintaining structural integrity through repeated verified designs and factory-controlled manufacturing.
Solution Approach 2:
The construction approach transitions from variable on-site concrete casting parameters to controlled factory manufacturing parameters. This allows precise control over material composition, dimensional accuracy, and assembly sequences, reducing construction complexity and improving quality consistency while maintaining structural integrity.
3Ease of manufacture
If on-site concrete casting is performed, then structural members are formed, but labor consumption and construction costs increase
Solution Approach 1:
All structural members and room unit components are pre-formed and pre-assembled in factories before delivery to the site. This eliminates the need for extensive on-site concrete casting operations, reducing labor consumption while maintaining construction feasibility through standardized assembly procedures and pre-engineered connection systems.
Solution Approach 2:
The manual on-site concrete casting process is replaced with industrialized factory fabrication processes. This substitution moves construction activities from the site to the factory, reducing on-site labor requirements while maintaining ease of manufacture through standardized production lines and automated assembly systems.
4Ease of manufacture
If traditional construction methods are used, then building structure is formed, but construction pollution and disturbance to surrounding residents increase
Solution Approach 1:
All construction activities including concrete casting, structural assembly, and finishing works are completed in controlled factory environments before delivery to the site. This preliminary action eliminates on-site pollution from concrete mixing and casting operations, reducing dust, noise, and waste while maintaining construction feasibility through standardized assembly processes.
Solution Approach 2:
The harmful construction processes are extracted from the on-site environment and relocated to factories. This separation removes pollution-generating activities (concrete casting, material processing) from the construction site, reducing disturbance to surrounding residents while maintaining construction feasibility through centralized manufacturing.
Data Source
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AI summary
Disclosed herewith a modular integrated building and a construction method thereof. The building comprises multiple prefabricated room units (1). A bottom of a load-bearing structure of the prefabricated room unit (1) is provided with a semi-prefabricated connecting port (2). Reinforcing bars arranged at a top of the prefabricated room unit (1) of a next floor are inserted in the connecting port (2) and thus connected with reinforcing bars arranged therein, so that the prefabricated room units (1) of two adjacent floors are connected with each other through in-situ casting concrete in the connecting port (2). A cast-in-situ concrete interlayer (3) is arranged on a top plate (11) of the prefabricated room unit (1) of a next floor, for connecting adjacent prefabricated room units (1) of a same floor together.