Prefabricated Concrete Components for High-Rise Buildings

High-rise buildings with prefabricated concrete components primarily adopt a prefabricated reinforced concrete full-frame shear wall structure, achieving efficient construction through factory prefabrication and on-site assembly.

Technical Principles

The core process of high-rise buildings with prefabricated concrete components is 'factory prefabrication + on-site assembly'. In specialized production bases, core components such as walls, floors, and beams are cast in one piece using high-precision molds. Each module integrates a steel reinforcement framework, insulation layers, waterproofing layers, and pre-installed piping systems, forming standardized 'building blocks'. The components use C30-C40 grade concrete with built-in Φ8-Φ12 steel reinforcement meshes, achieving a compressive strength of 25-30MPa, which is 1.5 times that of traditional brick-and-mortar structures. Walls are designed with EPS insulation layer slots for on-site insertion, improving thermal insulation by 40%. Modules are connected using pre-stressed bolts and welded steel plates to form an integrated framework, capable of withstanding wind speeds up to Category 10 and seismic intensity of 7 degrees (able to resist damage similar to that of the Wenchuan earthquake).

Application Examples

In 2023, China's first concrete modular high-rise building, 'Huazhang New Construction', was completed in Shenzhen. This project adopted a 'concrete module + cast-in-place shear wall' structural system, where modules serve both as architectural space and as permanent formwork. They work together with subsequently cast shear walls, connecting beams, and floors to form an integrated load-bearing structure, validating the feasibility of prefabricated components in high-rise construction.

Advantage Analysis

1. High Efficiency: A single 30㎡ module takes only 7 days for factory prefabrication. During on-site installation, three workers with a crane can complete a single module installation in 4 hours, and the entire construction of a 100㎡ house takes only 2 days.
2. Low Cost: Taking a 120㎡ rural self-built house as an example, the cost of a traditional brick-and-mortar structure is approximately 180,000-220,000 yuan, while the cost of the main modules for a concrete house is only 120,000-150,000 yuan, reducing the overall cost by 30%.
3. Strong Environmental Protection: Factory production achieves a 95% recycling rate for offcuts, with no dust or sewage emissions on-site. Construction waste is only 10% of that from traditional construction methods. Environmentally friendly concrete and water-based paints are used, with formaldehyde emissions ≤0.05mg/m³, well below the national standard (0.1mg/m³).
4. Flexible Space: Standard module dimensions are 6m×3m×3m, allowing for free adjustment of house types through horizontal splicing or vertical stacking (up to 3 floors).
5. High Safety: Field tests show that under Category 10 typhoons, there are no cracks in exterior walls or leaks in roofs; after a 6.2-magnitude earthquake, the main structure of the house remains intact, with repair costs less than 1,000 yuan.