Large Panel Prefabricated Components for Houses
Large panel prefabricated components for houses primarily involve large panel structure residences, also known as prefabricated wall panel structure residences, which refer to residences constructed by pre-fabricating interior wall panels, exterior wall panels, and floor slabs, and then assembling them on-site through hoisting.
Development History
Introduction and Initial Development (1950s-1960s) The technology for large panel structure residences was introduced to China from the Soviet Union in the 1950s, aiming to rapidly address the housing shortage. In 1958, China began researching technological reforms for large load-bearing wall panels and conducted pilot construction of five-story single-building prefabricated large panel residences in Beijing and other locations. This phase validated its advantages in shortening construction periods and reducing dead weight, but also exposed issues such as joint leakage and exterior wall condensation.
Promotion and Standardization (1970s-1980s) In the 1970s, technologies such as vibrated brick wall panels and silicate wall panels were promoted, extending to high-rise buildings. In 1978, the trial implementation of the "Provisional Regulations on the Structural Design and Construction of Prefabricated Large Panel Residential Buildings" marked the beginning of the standardization phase. The technology spread to more than twenty provinces and cities across the country, with a cumulative construction area of approximately 3.8 million square meters. Improvements were made to initially address issues of leakage and thermal insulation.
Decline and Renewed Emphasis (1990s to Present) After the mid-1980s, due to conflicts between design standardization and diversification, concerns about seismic safety, the cost advantages of cast-in-place concrete technology, and changes in the labor market, prefabricated large panel residences gradually declined. In the 21st century, prefabricated building components have regained attention due to their high production efficiency and environmental friendliness. After 2005, companies like Vanke Group drew on foreign technologies to develop a prefabricated shear wall residential structural system with Chinese characteristics, achieving significant improvements in standardized design and information management.
Structural Characteristics
The main prefabricated components include large sheets of interior and exterior walls, as well as large floor slabs or roof panels, all pre-fabricated in factories or on-site and installed through hoisting and assembly. The load-bearing method primarily relies on transverse wall bearing, but can also adopt longitudinal wall bearing or a combination of both.
Specifications and Dimensions of Prefabricated Panels
The standard length ranges from 3 meters to 4.2 meters, increasing in increments of 30 centimeters; lengths exceeding 4.2 meters require customization. Common widths are 50 centimeters and 60 centimeters. Thicknesses are typically 12 centimeters and 15 centimeters, with 12 centimeters being sufficient for ordinary rooms and 15 centimeters chosen for heavy load-bearing requirements. Special dimensions such as 3.8 meters incur an additional cost.
