Construction Process of Prefabricated Houses

The construction process of prefabricated houses mainly includes five core aspects: factory prefabrication, on-site assembly, key process handling, parallel operation optimization, and quality and precision control, as detailed below:

1. Factory Prefabrication: The Core of Modular Production
The construction of prefabricated houses begins with the standardized production of building modules in a factory. The building is disassembled into independent modules, including ceilings, floors, walls, and water and electricity pipelines, all manufactured through assembly-line operations. For example, the waterproofing layers in bathrooms and the pre-embedded pipelines in kitchens are integrated within the factory, avoiding errors and pollution associated with on-site construction. Each module is equipped with a detailed 'ID card' that includes information such as the project name, product model, and production date, enabling full lifecycle traceability. Factory production employs automated equipment and intelligent management, positioning steel bars with millimeter-level precision to ensure component accuracy far exceeding that of traditional construction methods.

2. On-Site Assembly: Rapid Integration of Modular Installation
After being transported to the construction site by vehicles, prefabricated modules are lifted and installed according to design drawings using equipment such as tower cranes. Module installation follows the principle of 'bottom-up, heavy-first, light-second,' with bottom-level modules fixed first, followed by layer-by-layer stacking. During installation, modules are mechanically connected through welding or high-strength bolts to form an overall structure. A practical example from a social housing project shows that modular assembly can reduce the installation period of the main structure to one-third of that of traditional methods.

3. Key Processes: Ensuring Structural Stability

• Foundation Treatment: After leveling the site, a concrete cushion is poured, and prefabricated foundation piles and beams are installed, secured with nuts and filled with high-strength grout to ensure foundation bearing capacity.
• Module Installation: Modules are lifted and installed at designated positions according to their numbers, with laser positioning technology used to calibrate verticality and levelness, with errors controlled within ±2mm.
• Gap Treatment: Gaps between modules are filled with specialized grout, while waterproof areas such as bathrooms and kitchens are sealed with silicone sealant to prevent leakage.

4. Parallel Operation Optimization: Key Technology for Compressing Construction Time
Unlike traditional on-site serial construction, prefabricated houses adopt a parallel 'design-production-installation' model. For example, while foundation work is underway, the factory can simultaneously produce upper-level modules; during on-site assembly, interior decoration can commence in advance. A project utilizing this model reduced the construction period from 2.5-3 years to just 1 year, significantly improving construction efficiency.

5. Quality and Precision Control: The Core Advantage of Industrialized Construction
Factory production achieves quality controllability through standardized processes and automated equipment. For example, steel bar tying is performed by robots to avoid manual errors; concrete pouring uses intelligent vibration systems to ensure compactness. Additionally, modules undergo multiple quality checks, including strength testing and waterproofing inspections, before leaving the factory, with a pass rate exceeding 99%, far surpassing the quality standards of on-site wet construction.