Prefabricated Structure Houses in Dazhou, Sichuan
There are a large number of prefabricated structure houses built in the 1970s and 1980s in Dazhou, Sichuan. These houses are severely aged and pose significant safety hazards, and efforts are currently underway to gradually eliminate these hazards through the renovation of dilapidated houses.
Construction Background and Current Status of Prefabricated Structure Houses
Most of the prefabricated structure houses in Dazhou, Sichuan, were built in the 1970s and 1980s, primarily concentrated in areas such as 'urban villages' or 'suburban villages'. For example, the original houses in the first phase of the urban renewal project in the Dongcheng area of Tongchuan District are mostly prefabricated structures. In the Yangtianwan area of Dachuan District, the houses are mainly self-built prefabricated panel structures from the 1980s and 1990s. Among the 64 houses in the second residential area of Dianziliang Community, most are low-rise, dilapidated self-built houses from the 1980s. Due to their age, these houses generally suffer from structural aging, wall cracking, reduced load-bearing capacity, and other issues. Some have been identified as 'Grade C' or 'Grade D' dilapidated houses, posing prominent safety hazards.
Causes of Safety Hazards in Prefabricated Structure Houses
Prefabricated structure houses are constructed using prefabricated panel splicing techniques, and their node connections (such as welding and bolt fixation) are prone to loosening due to long-term weathering, rainwater erosion, or foundation settlement. Additionally, the quality of early construction materials varied, and some houses lacked seismic structural measures, making them vulnerable to natural disasters such as earthquakes. As the service life extends, issues such as aging electrical wiring and lack of fire safety facilities further exacerbate safety risks.
Renovation Measures and Achievements in Dazhou City
To eliminate these hazards, Dazhou City has promoted the renovation of dilapidated houses in the central urban area through 'old-for-new' reconstruction, either by rebuilding on the original site or constructing new buildings elsewhere to enhance housing safety. The renovation models include 15 'old-for-new' projects, 10 repair and reinforcement projects, and 3 projects combining new and old structures. As of now, 28 projects have been initiated, benefiting 26,000 households. For example, by demolishing dilapidated houses and building new elevator apartments in the second residential area of Dianziliang Community, living conditions have been significantly improved. Such renovations not only address safety hazards but also optimize urban spatial layout and enhance residents' quality of life.
Significance of Renovation and Future Directions
The renovation projects for dilapidated houses in Dazhou City have transformed 'worrisome living conditions' into 'optimal living conditions' through systematic updates, providing residents with a safe and comfortable living environment. In the future, as renovation efforts continue, it is expected that more old prefabricated structure houses will be replaced by modern buildings, further enhancing urban safety levels and the living environment.
