Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
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Reduction Effect on Surface Temperature of Reinforced Soil Wall with Vegetated Facing

전면 식생형 보강토 옹벽의 표면온도 저감 효과

  • Jung, Sunggyu (Department of Geotechnical & Geo-Space Engineering, University of Science & Technology) ;
  • Lee, Kwangwu (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Cho, Samdeok (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Kim, Juhyong (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
  • Received : 2013.09.11
  • Accepted : 2013.11.01
  • Published : 2013.12.01
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Abstract

A new type of reinforced earth wall(REW) system is developed with vegetated facing which provides proper environment for long-term vegetation and also applicable to high retaining wall system. Vegetated retaining wall is a green alternative for retaining walls and an effective way to reduce heat island effect than conventional block or concrete systems. Several construction sites using vegetated facing is observed to monitor adaptation state of vegetation and estimate surface temperature of wall facing over two years. It was observed that a number of plants including Siberian chrysanthemum adapt well to the inside of the facing blocks because vegetation bag helps to keep a proper condition for vegetation. According to the results using thermographic camera, average surface temperature of vegetated facing is higher for all ranges of coverage ratio of vegetation. The increment of average surface temperature of vegetated facing is larger than that of non-vegetated facing when the air temperature rises, and vice versa.

본 연구에서는 장기식생이 가능한 전면 식생형 보강토 옹벽의 식생 환경 적합성을 모니터링하고, 전면벽체 표면온도 측정을 통해 한여름철의 콘크리트 옹벽 전면벽체의 온도 변화를 평가하였다. 이를 위해 장기식생이 가능하도록 식생 포대를 삽입한 특수 블록 벽체를 시공하여 구절초, 맥문동을 포함한 20여 종의 종자 식재 후 2년간 식생 환경을 관찰하였을 뿐만 아니라, 실제 크기의 식생 옹벽을 건설하여 한여름철 식생 및 무식생 옹벽의 전면벽체 표면온도를 비교 분석하였다. 식생 환경 모니터링을 수행한 결과, 장기 식생이 가능한 블록 내에 식재된 대부분의 식물 생장 상태는 양호한 것으로 나타났으며, 식생 포대를 삽입한 블록 벽체가 식물의 성장에 적합한 환경을 제공하는 것으로 나타났다. 또한, 한여름철의 식생 옹벽과 무식생 옹벽의 콘크리트 블록 표면의 온도 변화량을 측정한 결과, 식생 옹벽에 비해 무식생 옹벽의 표면온도가 높게 나타났다. 식생 옹벽의 전면벽체의 경우, 무식생 옹벽의 전면벽체에 비해 표면온도 증가율이 작게 나타난 반면, 냉각율은 더 크게 나타나 장기식생이 가능한 전면 식생형 보강토 옹벽은 식생을 통해 열섬효과를 완화하는데 효과적으로 작용할 수 있을 것으로 판단된다.

Keywords

References

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