Prefabricated Panel Houses in Mianzhu After the Earthquake
Prefabricated panel houses in Mianzhu after the earthquake pose serious safety hazards, and while some actions have been taken, overall renovation still faces challenges.
I. Current Situation and Safety Hazards of Prefabricated Panel Houses
Mianzhu City has a large number of prefabricated panel houses built in the 1990s. After more than three decades of weathering and the severe impact of the May 12 earthquake, the structures of these houses have severely deteriorated. Specific issues include wall cracks, loose floor slabs, and rusted steel bars. Some houses have even been classified as D-grade dilapidated houses (brick-concrete hollow prefabricated panel structures). During the May 12 earthquake, 80% of the buildings in the urban area of Mianzhu were prefabricated panel houses, which had extremely poor seismic performance. Schools in Beichuan and Dujiangyan collapsed entirely due to their prefabricated panel structures, with over 95% of the collapsed buildings being prefabricated panel houses, resulting in a large number of casualties. Currently, some prefabricated panel houses have exceeded their 35-year service life and are still in use despite their structural issues. Although the exterior walls of some street-facing houses have been painted with real stone paint, the internal cracks have not been repaired, and the structural dangers have not been substantially resolved.
II. Government Actions and Renovation Progress
The Mianzhu Municipal Party Committee and Government have taken actions on some prefabricated panel house communities with safety hazards. For example, in response to safety concerns raised by homeowners in the Hongyan Coal Mine Zhonggan Building community, relevant departments conducted on-site investigations and found issues such as blocked fire exits and ineffective crack repairs, and requested that solutions be formulated as soon as possible. Additionally, there have been calls for a comprehensive inventory and inspection of prefabricated panel houses built in the 1990s across the city, assessing the structural safety of each building on a case-by-case basis. Houses identified as dilapidated are to be prioritized for demolition and reconstruction or reinforcement and renovation plans, and homeowners are to be included as key beneficiaries of housing security and relocation and resettlement programs to address the living safety issues of vulnerable groups such as the elderly, weak, sick, and disabled. However, rumors that 'all D-grade houses in Mianzhu will be demolished and rebuilt' have not been officially confirmed.
III. Renovation Challenges and Future Directions
The renovation of prefabricated panel houses faces multiple challenges, including funding, technology, and social coordination. For some houses, due to their age, the cost of reinforcement may be higher than that of reconstruction, and comprehensive demolition and reconstruction require substantial financial support. Additionally, the renovation of old urban areas needs to balance the preservation of historical features with safety requirements, and the resettlement of residents also needs to be properly addressed. In the future, it is necessary to further promote the implementation of policies, increase financial investment, and introduce professional institutions to conduct structural safety assessments to ensure that renovation plans are scientifically feasible.
