PCM 혼입 모르타르 패널 적용에 따른 옹벽 배면 동결영역 저감 효과에 대한 수치해석 연구

초록

Recently, abnormal weather events have become more frequent worldwide, and the incidence of extreme cold waves during winter has been increasing in Korea. The freeze–thaw cycles of soil caused by such cold waves can cause serious damage to ground structures. In particular, when it occurs in the backfill soil behind a retaining wall, these cycles may significantly compromise wall stability due to changes in soil pressure and bearing capacity. Therefore, this study proposes a method of applying panels made of phase change material (PCM) mixed with cement mortar to retaining walls as a measure to prevent damage to structures caused by freezing and thawing. The effectiveness of this approach in reducing the frozen area is quantitatively evaluated through laboratory experiments and numerical analyses. The results confirmed that the thermal buffering performance of the PCM panel effectively reduced the frozen area in the backfill soil, demonstrating its effectiveness. This method is expected to be applied as a measure to prevent freezing–thawing damage to structures in cold regions.

키워드