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Affected by climate change, traditional aga soil roofs in China's Tibet region are increasingly prone to cracking and seepage deterioration. This study selected the Potala Palace as a representative case to conduct systematic damage investigations. Field-collected samples of traditional and modified aga soil were subjected to cross-sectional observation and laboratory analysis. In-situ monitoring devices were installed to obtain the moisture content variations in aga soil roof during the process of compaction, curing, and service. This study reveals the characteristic degradation processes of surface weathering and crack development of aga soil roofing systems, along with the environmental impact mechanisms under Tibet's representative plateau climate. Through comparative evaluation of traditional aga soil roofing practices employed in the Potala Palace and the modified techniques implemented during its Phase II restoration, the research proposed the improvement strategies to enhance climate resilience. The research data and findings contribute to establishing a scientific understanding of aga soil materials, while providing actionable theoretical frameworks for preventive conservation of Tibetan architectural heritage.

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Preservation and Enhancement of Tibetan Aga Soil Roofing: Deterioration and Application Evaluation Based on Laboratory Analysis and In-Situ Monitoring Experiments

  • 会议论文

  • 发表日期：

    2026年

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  • Shi Hu,
  • Yike Cai,
  • Wenyi Dai,
  • Shihu Feng,
  • Fei Lu,
  • Xiaomeng Ding

摘要

Affected by climate change, traditional aga soil roofs in China's Tibet region are increasingly prone to cracking and seepage deterioration. This study selected the Potala Palace as a representative case to conduct systematic damage investigations. Field-collected samples of traditional and modified aga soil were subjected to cross-sectional observation and laboratory analysis. In-situ monitoring devices were installed to obtain the moisture content variations in aga soil roof during the process of compaction, curing, and service. This study reveals the characteristic degradation processes of surface weathering and crack development of aga soil roofing systems, along with the environmental impact mechanisms under Tibet's representative plateau climate. Through comparative evaluation of traditional aga soil roofing practices employed in the Potala Palace and the modified techniques implemented during its Phase II restoration, the research proposed the improvement strategies to enhance climate resilience. The research data and findings contribute to establishing a scientific understanding of aga soil materials, while providing actionable theoretical frameworks for preventive conservation of Tibetan architectural heritage.