Prefabricated Concrete Modular Housing

Prefabricated concrete modular housing is a type of prefabricated building that involves the industrial production of building components and their on-site assembly.

Technical Scope and Component Types

The core technology of prefabricated concrete modular housing lies in prefabricated concrete structures, with components including prefabricated beams, slabs, walls, columns, and other products. These components are manufactured in factories through standardized and large-scale production processes and then transported to construction sites for assembly, forming a complete building structure. This industrial production method significantly improves construction efficiency while reducing the complexity of on-site construction.

Development History

China's prefabricated concrete technology began in the 1950s, initially applied mainly in factory and residential construction. In the 1970s, driven by the policy of building “three modernizations” (standardized design, industrialized component production, and mechanized construction), technical systems such as large-panel structures and box structures emerged. By the mid-1980s, due to high costs and quality defects, technological development stalled. After the 21st century, with improvements in production efficiency and increased demand for environmental protection, the technology experienced a resurgence. Companies like Vanke Group developed prefabricated shear wall residential structural systems and applied prefabricated frame technologies in projects, such as the Nanjing Jindi Yufang project, which adopted a prestressed prefabricated concrete integrated frame structural system.

Characteristics of Panel-Based Prefabricated Buildings

Panel-based prefabricated buildings use prefabricated wall panels and floor slabs as core components, enabling rapid assembly through standardized design. Their advantage lies in expanding usable area, but they offer relatively low design flexibility and are typically suitable for building types with clear functional requirements.

Advantages and Challenges of Modular Buildings

Modular buildings represent a higher level of integration within prefabricated construction, breaking down buildings into independent modules that are manufactured in factories and then assembled on-site. Construction periods can be reduced by over 60%, offering advantages such as short timelines, controllable quality, energy efficiency, environmental protection, and ease of maintenance. For example, a social housing project in Shenzhen, Guangdong, used 6,028 concrete modules to assemble five residential buildings nearly 100 meters tall. The completion and delivery timeline was reduced from 2.5-3 years to just 1 year, with on-site labor reduced by about 50%. Additionally, noise, dust, construction waste, and traffic congestion were significantly minimized. However, modular buildings impose extremely high demands on industrial infrastructure, requiring a well-developed technical system, production system, and industrial cluster for support.