Prefabricated Concrete House Assembly

Prefabricated concrete house assembly is a construction method that involves industrial production of building components and on-site assembly, with its core being prefabricated concrete assembled houses or prefabricated modular buildings.

Main Types and Technical Systems

Prefabricated concrete house assembly mainly falls into three categories: panel-based assembly (primarily using prefabricated wall panels and floor slabs assembled with connectors), box-based assembly (prefabricating entire rooms as 'box' units for on-site assembly), and frame-based assembly (using prefabricated beams and columns to form a frame, with wall panels filled in). The technical systems cover prefabricated concrete structures (such as prefabricated shear walls and frames) and steel structures (light steel frames combined with concrete). Component types include standardized prefabricated products like beams, slabs, walls, and columns, with some projects adopting fully prefabricated structures to enhance efficiency.

Core Advantages

1. Reduced Construction Time: Factory-prefabricated components are produced concurrently with on-site work, minimizing traditional wet construction time and reducing overall project duration by 30%-50%.
2. Environmental Protection and Energy Efficiency: On-site dust and noise pollution are reduced by over 60%, with construction waste cut by approximately 80%, meeting green building standards.
3. Cost Control: Mass production lowers component costs, while labor expenses decrease by 20%-30%, making it particularly suitable for standardized residential projects.
4. Stable Quality: Factory production eliminates on-site construction errors, achieving millimeter-level component precision and significantly enhancing structural safety.

Construction Process and Procedures

Construction is divided into two stages: factory prefabrication and on-site installation:

• Factory Stage: Components are produced according to design drawings, followed by curing, quality inspection, and pre-embedding of pipelines and window/door frames.
• On-site Stage: Components are lifted by cranes and secured using bolted connections, welding, or sleeve grouting techniques, followed by decoration and finishing.
  The complete process includes standardized design (modular design), industrialized manufacturing (automated production lines), specialized transportation (damage-resistant packaging and logistics), precise installation (BIM-assisted positioning), and integrated decoration (simultaneous execution with main structure).

Development History and Current Applications

China's prefabricated concrete technology originated in the 1950s, initially used for factory and residential construction before declining due to technical limitations. In the 21st century, rising labor costs and stricter environmental policies spurred its revival and rapid development. Companies like Vanke Group have developed prefabricated shear wall residential structural systems and applied prefabricated frame technologies in Beijing, Shanghai, and other cities. Additionally, China's prefabricated housing exports have grown significantly, with Guangzhou Customs reporting RMB 1.4 billion in activity house exports in the first four months of 2026, a 38.1% year-on-year increase, primarily to Southeast Asia and the Middle East, demonstrating international competitiveness.