Prefabricated Housing Component Construction
Prefabricated housing component construction is a building method that involves industrial production of building components and on-site assembly, offering advantages such as efficiency, precision, and environmental friendliness.
Main Types and Technical Systems
Prefabricated housing component construction is primarily divided into three categories: panel-based assembly, box-based assembly, and frame-based assembly. Panel-based assembly focuses on prefabricated wall panels, floor slabs, and other components, which are assembled on-site to form the building's main structure. Box-based assembly involves prefabricating complete room modules (including finishes and equipment) in factories and then transporting them to the site for assembly. Frame-based assembly centers on prefabricated structural components such as beams, columns, and floor slabs, which are connected at nodes to form a frame system. Technologically, it encompasses prefabricated concrete structures and steel structures, with the former primarily using reinforced concrete components and the latter employing lightweight steel components suitable for high-rise or large-span buildings. Component types include standardized products such as beams, slabs, walls, and columns, with some projects integrating systems like doors, windows, and piping to achieve an integrated "structure-finish-equipment" approach.
Core Advantages of Modular Construction
Taking modular construction as an example, it divides buildings into independent modules, completing the entire manufacturing process—including structure, walls, utilities, and finishes—in factories before transporting them to the site for assembly. Factory-based production adopts a parallel operation model, combining automated vertical warehouses with intelligent production lines to handle multiple module manufacturing tasks simultaneously, significantly shortening construction periods. In terms of precision control, the position of each steel bar and screw is measured in millimeters, with errors far lower than traditional construction methods, ensuring structural safety and building quality. Regarding construction efficiency, modular construction can reduce project durations by over 60% compared to traditional methods, with reduced on-site work, lowering reliance on labor and the environment.
Typical Construction Process and Cases
Taking prefabricated residential buildings as an example, the construction process includes:
- Foundation Construction: Pouring cement foundations, erecting the house's chassis frame, and laying floor joists;
- Structural Installation: Placing prefabricated beam components, securing nodes with metal connectors, and covering wooden panels to form a platform;
- Wall Assembly: Erecting and fixing prefabricated wall modules onto the base plate to complete the exterior wall frame enclosure;
- Internal Partitioning: Cutting and assembling partition wall frames and laying second-floor beam slabs;
- Roof Construction: Hoisting triangular trusses onto the top beams of the walls to complete roof enclosure.
Application Cases in China: After the 21st century, companies like Vanke Group have developed prefabricated shear wall residential structural systems and adopted prestressed prefabricated concrete integrated frame structural systems in projects like the Nanjing Jindi Yufang project, validating the feasibility of prefabricated technology in high-rise residential buildings. Additionally, prefabricated concrete technology was applied to factory and residential construction as early as the 1950s. With increasing demands for environmental protection and efficiency, this technology is gradually becoming one of the mainstream construction methods.
