Building Houses with Prefabricated Walls

Building houses with prefabricated walls is a form of panel-based prefabricated construction within the broader category of prefabricated buildings, utilizing prefabricated wall panels and floor slabs as core components to achieve rapid construction through industrial production and on-site assembly.

Technical Types and Core Components

The technical system for building houses with prefabricated walls encompasses prefabricated concrete structures and steel structures, with core components including prefabricated wall panels, floor slabs, beams, and columns. These components are produced in factories using standardized processes, ensuring dimensional accuracy and quality stability, and are assembled on-site into a complete structure through connection nodes (such as bolts, welding, or concrete pouring). For example, in a rural case in Henan, a fully reinforced concrete structure was used, and the main body of a 200-square-meter house was erected in just 4 hours.

Construction Process and Efficiency Advantages

After being prefabricated in factories, the components are transported to the site. Lightweight cranes or hoists are used to vertically lift the prefabricated walls into their designed positions, where they are secured with supports and adjusted for verticality and levelness. Finally, concrete is poured or dry connections are made to form a complete structure. Construction speed is increased by 50%-70% compared to traditional methods, and construction costs are significantly reduced. For instance, some projects in Fujian Province have achieved a reduction in construction waste of over 70% through policy support, and in the rural case in Henan, the cost per square meter was only 300 yuan.

Advantages and Characteristics

1. Environmental Protection and Recycling: Industrial production reduces on-site wet operations, lowering dust and noise pollution; some wall panel materials (such as steel structures and aluminum alloys) can be 100% recycled, supporting complete disassembly and relocation for reuse.
2. Cost Controllability: Standardized component mass production reduces material waste, and labor costs are reduced by approximately 30%, making it suitable for low-cost rural housing and temporary building needs.

Limitations

1. Limited Design Flexibility: Standardized production of prefabricated components makes it difficult to meet diverse housing layout requirements, and spatial layout adjustments rely on modular combination design.
2. Performance Defects: Some projects have leakage risks (such as insufficient sealing at connection nodes), seismic performance depends on structural design (which must comply with seismic codes), and sound insulation and thermal insulation effects need to be improved with additional materials.
3. Transportation and Equipment Requirements: Highly integrated components (such as complete bathroom units) require large transportation vehicles and hoisting equipment, increasing construction difficulty in remote areas.

Application Scenarios

Modern applications include rural self-built houses (such as prefabricated concrete houses in Henan), temporary buildings (such as container houses), and customized prefabricated houses (such as those sold on the Pinduoduo platform as complete villas). Historical examples include the widespread use of such technologies in old residential areas from the 1960s to 1980s (such as Suzhou Nanhuan New Village), which are now being upgraded through renovation or reconstruction.