Prefabricated Wall Panel Structure House

A prefabricated wall panel structure house is a type of prefabricated assembled building that uses prefabricated concrete panels as its walls, with components produced industrially and assembled on-site.

Construction Method and Advantages

Prefabricated wall panel structure houses adopt an industrial production model. Building components, such as prefabricated wall panels and floor slabs, are manufactured in factories and then transported to the site for assembly using mechanical lifting and bolt connections. This construction method is similar to “building with Lego blocks,” significantly shortening the construction period and reducing labor costs while minimizing on-site wet work and construction waste, aligning with green building principles.

Structural Performance Characteristics

Advantages:

1. Strong Integrity: Prefabricated wall panels are integrated with steel mesh formwork to form a continuous concrete barrier without the brick joints found in traditional brick masonry structures, reducing potential structural weaknesses.
2. Functional Integration: The walls can have built-in insulation layers, soundproofing layers, or pre-installed piping systems, enhancing the building's sound insulation, thermal insulation, and energy efficiency to meet modern architectural requirements for comfort and environmental protection.

Disadvantages:
Early prefabricated wall panel structure houses, such as the assembled large-panel residential buildings of the 1970s-1980s, suffered from poor earthquake resistance, weak node connections, and inadequate waterproofing, leading to damage in earthquakes or obsolescence due to leakage.

Historical Development and Modern Improvements

1. Development History:

   • China's prefabricated concrete technology began in the 1950s, influenced by the Soviet Union, and was applied to factory buildings and residential structures; by the 1970s, a large-panel structural system had been established under policy promotion.
   • After the mid-1980s, the proportion of prefabricated structures declined due to difficulties in cost control, quality defects, and policy adjustments; in the 21st century, with technological advancements and increased environmental demands, companies like Vanke developed new types of prefabricated shear wall residential structural systems, driving industry revitalization.

2. Modern Improvements:

   • Through optimized design (such as scientific distribution of steel reinforcement and built-in high-efficiency insulation layers) and industrial production processes (such as high-precision molds and steam curing), the quality of components, construction efficiency, and environmental friendliness have been significantly improved.
   • Modern prefabricated wall panel structure houses can now meet seismic requirements in high-intensity earthquake zones, becoming an important direction for the future development of building industrialization.

Existing Problems and Solutions

Old prefabricated wall panel structure houses, such as early prefabricated panel buildings, commonly suffer from low structural strength, short service life, wall cracks and leakage, and poor thermal insulation, with some classified as “dangerous buildings.” Solutions include exterior renovation (such as adding insulation and waterproof layers), structural reinforcement (such as adding steel supports or carbon fiber cloth), or inclusion in demolition and reconstruction plans.