Prefabricated Concrete House Main Body

The prefabricated concrete house main body is a rapidly constructed building form centered around a reinforced concrete structure, achieved through factory prefabrication and on-site hoisting and assembly. Its technical features, performance advantages, and applicable scenarios are as follows:

I. Structure and Construction Process
The prefabricated house main body uses C35 concrete and Φ14 deformed steel bars, with a single-module reinforcement ratio of 1.2%. The wall thickness is 200mm, and the compressive strength reaches 30MPa (capable of withstanding 3,000 tons per square meter). Modules are produced in the factory within a cycle of just 7 days, with errors controlled within 2mm. They are then hoisted to the site using cranes for assembly. Assembly techniques include high-strength mortar filling or a dual connection method combining mortise-and-tenon joints with bolts to ensure structural stability. For example, the main body of a three-story villa covering 200 square meters in Qixian, Henan, was assembled in just 4 hours.

II. Performance and Safety

1. Disaster Resistance: It has been tested to withstand typhoons of Category 12 (wind speed of 37m/s) and earthquakes of intensity 9. During the Jishishan earthquake in Gansu, 2,000 relief houses were built within 72 hours, with simulated tests showing an overall displacement of only 3cm.
2. Thermal Insulation and Energy Efficiency: The walls are embedded with EPS insulation layers, reducing heating costs by 50%. The roof is pre-installed with interfaces for photovoltaic panels, enabling a 200-square-meter house to generate up to 3,000 kWh of electricity annually.
3. Environmental Protection and Efficiency: Construction waste is reduced by 98%, and labor costs are 60% lower than traditional construction methods. A 100-square-meter house can be ready for occupancy in just 5 days from a bare site, with a main body construction cost of approximately 100,000 to 120,000 yuan, which is 30% cheaper than brick-and-mortar structures.

III. Limitations and Considerations

1. Design Flexibility: Limited by modular design, custom structures such as rounded balconies require an additional 20% cost.
2. Scope of Application: Experts recommend using such houses in non-seismic zones and for buildings with no more than 5 floors. Associate Professor Chi Yin from the School of Civil Engineering at Wuhan University points out that modular prefabricated structures must meet seismic design specifications to ensure structural safety in high-rise buildings.
3. Assessment of Assembly Joints: It is essential to focus on inspecting the seismic performance of assembly joints to avoid safety hazards caused by weak connections.

IV. Typical Application Scenarios
It is suitable for scenarios with high demands for speed, cost, and environmental protection, such as post-disaster relief, temporary housing, and rural self-built houses. For example, the rapidly constructed relief houses during the Jishishan earthquake in Gansu and the efficient villa construction in Qixian, Henan, both demonstrate the advantages of industrialized construction.