Prefabricated Concrete House
Prefabricated concrete house is a technology that involves pre-fabricating concrete components and assembling them on-site. It offers advantages such as shortened construction periods, reduced costs, and minimized construction waste. The main types include panel, box, and frame prefabrication, with connection methods divided into wet and dry connections.
Prefabricated concrete house, also known as prefabricated concrete or prefabricated modular construction, refers to concrete components that are pre-fabricated and assembled on-site. This technology achieves component standardization through industrial production and employs methods such as steel bar sleeve grouting and prestressed connections for assembly. Its core applications include prefabricated floor slabs, beams, walls, columns, and other components, covering types such as composite floor slabs, prestressed composite beams, and sandwich insulation exterior walls.
The main types of prefabricated concrete houses include panel prefabrication, box prefabrication, and frame prefabrication. Panel prefabrication primarily uses prefabricated wall panels, floor slabs, and other components, which are assembled on-site to form the building structure. Box prefabrication divides the building space into multiple 'box' units, each containing a complete structure, finishes, and equipment, which are then directly assembled on-site. Frame prefabrication centers around a prefabricated frame structure, with beams and columns combined into a whole through connection nodes.
Connection technologies are divided into wet and dry connections. Wet connections include methods such as sleeve grouting and grout-anchor connections, which achieve reliable connections between components through concrete or grout. Dry connections employ pre-embedded connectors, prestressed tendons, and other methods, eliminating the need for on-site wet work and improving construction efficiency. Among them, prestressed technology enhances the crack resistance and seismic performance of components by applying pre-compression stress, making it suitable for buildings in high-seismic-intensity areas.
Prefabricated concrete houses offer significant advantages. Industrial production shortens construction periods; for example, a two-story reinforced concrete shell house can be completed in approximately two weeks. Standardized components reduce material waste and minimize construction waste. Modular design facilitates quality control and improves construction accuracy. China's prefabricated concrete technology originated in the 1950s, initially applied in factory and residential construction. It experienced a resurgence in the 21st century due to its production efficiency and environmental benefits. Companies like Vanke Group have developed prefabricated shear wall residential structural systems and applied prefabricated frame technology in engineering projects, driving the industry toward green and efficient development.
