What is the Translation of Prefabricated Concrete House in English

Prefabricated concrete houses, also known as prefabricated assembled buildings, refer to a form of construction where building components are industrially produced and assembled on-site.

Core Definitions and Types

The core of prefabricated concrete houses lies in 'industrial production' and 'on-site assembly'. Components such as beams, slabs, walls, and columns are standardized and produced in factories before being transported to the construction site, where they are pieced together into a complete building using techniques such as steel bar sleeve grouting and prestressed connections. Based on their structural forms, they can be mainly divided into three categories:

1. Panel-assembled: Using prefabricated wall panels and floor slabs as core components, a load-bearing system is formed through lamination or connection. Its advantage lies in expanding indoor usable area (due to reduced wall thickness), but it has lower design flexibility and is mostly used in standardized residential buildings or factory buildings.
2. Box-assembled: Functional units such as bathrooms and kitchens are prefabricated into independent 'boxes' and directly combined on-site. Construction speed is increased by 50%-70% compared to traditional methods, but it requires high transportation and lifting equipment, making it suitable for modular hotels, apartments, and other scenarios.
3. Frame-assembled: A frame structure is formed using prefabricated columns and beams, which are then filled with wall panels. It combines structural strength with spatial flexibility and is commonly used in high-rise buildings or public buildings.

Technical Advantages and Challenges

Advantages:

• Efficiency Improvement: Industrial production reduces on-site wet work, shortening the construction period by 30%-50%.
• Cost Optimization: Standardized components reduce material waste, and labor costs are reduced by about 20%.
• Environmental Benefits: Construction waste is reduced by more than 60%, and construction noise and dust pollution are significantly reduced.
• Quality Control: The factory environment ensures component precision, reducing common quality issues (such as leakage and cracking).

Challenges:

• Transportation Limitations: Large components require special vehicles, and transportation costs are high in remote areas.
• Connection Technology Requirements: Processes such as steel bar sleeve grouting require strict quality inspection; otherwise, they may affect structural safety.
• Initial Investment: Factory construction and mold development costs are high, making it suitable for large-scale projects.

Development History and Applications

Prefabricated concrete technology in China began in the 1950s and was initially used in factory buildings and low-rise residential buildings. In the 21st century, with the tightening of environmental policies and rising labor costs, the technology has regained attention. Companies like Vanke have developed prefabricated shear wall residential systems, integrating BIM technology to achieve design-production-construction integration, promoting the widespread application of prefabricated concrete houses in affordable housing and commercial complexes. Currently, this technology covers more than 80% of the provinces in China and has become an important direction for green buildings.