Construction of Reinforced Concrete Prefabricated Panel Houses
The construction of reinforced concrete prefabricated panel houses involves three aspects: component fabrication, construction process, and application development.
I. Component Types and Fabrication Prefabricated panels are cement components manufactured in factories. To produce them, wooden molds are nailed together, steel bars are arranged, and cement is poured to form the panels, which come in two types: solid and hollow. Hollow panels achieve lightweighting by reducing the non-load-bearing concrete, making them lighter and more cost-effective, and thus widely used. Prefabricated reinforced concrete floor components also include flat panels and channel panels: channel panels adapt to different support requirements through their positive and negative structures, featuring standardized specifications with lengths typically multiples of 300mm, widths multiples of 100mm, and thicknesses ranging from 120-300mm. Prestressed technology can save 30%-50% of steel and 10%-30% of concrete while improving crack resistance and extending the service life of components.
II. Construction Process At the construction site, light cranes are used to lift reinforced concrete walls, which are then fixed with special brackets to ensure the panels are level and perpendicular to the ground. After installation, concrete is poured into the structural spaces to form integral walls. The installation of prefabricated floors must meet support length requirements: the support length on walls should be ≥90mm, and on beams ≥60mm. Panel joint treatment varies based on width: for narrow joints, fine aggregate concrete is poured; for wider joints, steel bar meshes are added for reinforcement, and anchor bars are used to enhance overall integrity and prevent cracks.
III. Application and Development Prefabricated panel houses originated in the early 20th century, initially used mainly for floor panels and roof insulation layers. Most residential buildings constructed in China before 1985 adopted this structure. However, with advancements in construction technology, cast-in-place concrete and prefabricated buildings have gradually replaced traditional prefabricated panel houses, with the latter's construction period being 30% shorter than traditional methods. Since 2022, China has implemented a policy of renovating old buildings, focusing on repairing and upgrading prefabricated panel houses and only demolishing those that meet the criteria for dangerous buildings. Existing prefabricated panel houses have issues such as weak earthquake resistance and poor sound and thermal insulation, with a service life of approximately 30-50 years. Nevertheless, with improvements in industrial standards, digital precision, and automation efficiency, house construction is shifting from "on-site construction" to "factory manufacturing." China's "prefabricated houses" have broad development prospects in the global market. In the first four months of 2026, enterprises in the Guangzhou Customs district exported portable houses worth 1.4 billion yuan, a year-on-year increase of 38.1%; Shenzhen Port exported portable houses worth 1.68 billion yuan, a year-on-year increase of 19.6%.
