Prefabricated Assembled House Construction Technology

The construction technology of prefabricated assembled houses mainly adopts a modular building model, achieving efficient construction through a combination of factory prefabrication and on-site assembly. The core processes and technical features are as follows:

1. Factory Prefabrication: Standardization and Intelligence in Parallel
Components such as ceilings, walls, floors, and water and electricity pipelines of the house are all prefabricated on factory assembly lines. Some projects utilize automated three-dimensional warehouses and intelligent production lines to shorten construction periods through parallel operations. For example, a public housing project in Shenzhen used 6,028 concrete modules, reducing the construction period from the traditional 2.5-3 years to just 1 year. Factory prefabrication enables millimeter-level precision control, ensuring uniform component dimensions while reducing material waste through centralized production and improving resource utilization. Additionally, the enclosed factory environment avoids the impact of weather on construction, further ensuring quality stability.

2. On-site Assembly: Precise Assembly and Efficient Construction
After being transported to the site, the prefabricated modules are quickly assembled using equipment such as tower cranes, a process similar to 'building with blocks'. Each module comes with a detailed 'ID card' indicating the project name, product model, and production date for easy traceability and management. Construction precision is controlled in millimeters, ensuring tight module connections through high-precision positioning technology and avoiding errors caused by manual operations in traditional processes. For example, a renovation project of a dilapidated building in Fengtai District, Beijing, adopted 'low-rise steel-concrete composite modules', completing the main structure hoisting to completion in a very short time, significantly improving construction efficiency.

3. Technical Requirements: Dual Guarantees of Materials and Processes
Modular buildings require the use of special materials, such as high-strength steel plates and weathering steel, to adapt to stress changes during transportation and hoisting. Before concrete pouring, steel reinforcement must be strictly tied to ensure structural strength meets design requirements. The construction process must fully adhere to design drawings, imposing high demands on the industrial foundation and requiring the collaborative support of technical systems, production systems, and industrial clusters. For example, connection nodes between modules must use high-strength bolts or welding processes and undergo non-destructive testing to ensure safety.

4. Advantages: Environmental Protection, Efficiency, and Maintainability
Compared to traditional processes, modular buildings reduce construction periods by more than 50% and significantly improve quality controllability. Factory prefabrication reduces on-site wet operations, lowering noise and dust pollution, and meeting green building standards. Modular design facilitates later maintenance, allowing quick replacement of individual damaged components and extending the building's service life. Additionally, standardized production reduces reliance on manual skills, promoting the industrial transformation of the construction industry.