• 방재와보험
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• s.110
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• pp.56-61
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• 2005

쌀쌀한 찬바람에 어느덧 겨울이 성큼 다가왔다. 전체 화재의 상당부분을 차지하는 동절기 화재사고는 다른 계절에 비해 상대적으로 화기를 필요 이상으로 많이 사용하게 되고 추운날씨로 인해 화재예방 점검을 소홀히 하기 때문이다. 부주의로 인하여 발생되는 동절기 화재사고의 사례을 살펴봄으로써 화재에 대한 경각심을 새롭게 갖는 한편, 그에 따른 문제점과 대책을 알아 보고자 한다.

• Asian Journal of Turfgrass Science
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• v.25 no.2
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• pp.133-137
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• 2011

Winterkill can be defined as any injury including freeze stress kill, winter desiccation, and low temperature disease to turfgrass plants that occurs during the winter period. The major damages from winterkill were low temperature kill, crown hydration, and winter desiccation. Low temperature kill is caused by air and soil temperature. Soil temperature affect more severe to turfgrass than air temperature because low soil temperature cause fetal damage to turfgrass crown. Crown hydration is a form of winter injury in which intercellular water within the plant freezes and causes physical injury to the cell membrane and wall. This is eventually resulted in dehydration of cell. Winter desiccation is the death of leaves or whole plants due to drought during the winter period. To reduce winterkill damage, cultivar selection is very important. If changing cultivar is not allowed, cold temperature hardiness needs to be increased by providing nutrients especially phosphorus and potassium in the late fall. Turf cover is effective way to reduce winterkill damage. Remaining snow is positive process to reduce winterkill damage by insulating soil temperature. The previous researches reported many materials as turf cover such as straw, polypropylene, polyester, and wood mat. Aeration and topdressing is one of the process against winterkill. Both methods are mainly conducted to reduce thickness of thatch layer. In recent, relatively new materials called black or winter topdressing sand are used to protect soil temperature from low air temperature and thaw ice crystal that may remain in soil.

• 월간낙농육우
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• v.29 no.11
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• pp.80-85
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• 2009

• 월간낙농육우
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• v.29 no.11
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• pp.86-96
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• 2009

• 월간낙농육우
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• v.29 no.11
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• pp.104-111
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• 2009

• LP가스
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• s.82
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• pp.63-67
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• 2002

서울시는 동절기를 맞아 가스공급시설 등에 대한 안전점검 및 홍보강화를 통해 재해요인을 사전에 제거하기 위해 동절기 가스안전관리 추진계획을 마련했다.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 1999.04a
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• pp.26-28
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• 1999

동절기 급격한 온도 저하로 인한 적용한계를 극복하기 위하여 composting 기술을 현장에 적용하여 적용 가능성을 검토하고 온도 변화에 따른 분해 특성을 검토하였다. 기초 실험을 통해 영양원과 유류분해 미생물의 첨가에 따른 분해 효율을 점검한 결과 초기 유효 미생물 (유류분해 미생물)의 농도가 낮고 영양원(N, P source)의 불균형으로 인해 영양원의 첨가와 유류분해 미생물을 동시에 투입하는 것이 바람직한 것으로 나타났으며, 동절기 낮은 온도를 극복하기 위해 퇴비를 투입한 Co-composting 기술은 주입된 퇴비의 영향으로 pile 내부의 온도가 30-40일 동안 중온상태를 유지하였으며, 제거효율은 91%로 나타났다. 따라서 유류 오염토양을 복원함에 있어서 동절기에도 별도의 시설투자 없이 효율적으로 유류를 분해시킬 수 있는 CO-Composting 기술의 적응 가능성이 확인되었으며, 난분해성 물질의 생물학적 분해에 있어서도 다양하게 적용될 수 있을 것으로 판단된다.

• Korean Journal of Construction Engineering and Management
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• v.5 no.6 s.22
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• pp.170-178
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• 2004

Public construction companies have strictly followed a rule that they should not work in the wet area such as structural frame for a certain period during the winter season. It is usually known that the non-working period during the winter causes increase of the project duration, and the project cost escalation. Also, it makes negative effects on national economy because it reduces workers income. Therefore, the site work for the structural frame should be performed even during the whiter season. But the site work for the structural frame during that period cannot proceeds in the same way as during other periods, and requires a different method for estimating project duration. Through an analysis of time scheduling mechanism, actual working days are obtained for 1 cycle of typical floors in the structural frame during these periods, and non-working days of 5 years average are calculated based on calendar day using data of 5 years weather forecasts for that season. This study proposes an optimized way of estimating project duration for 1 cycle of typical floors in the structural frame during these periods. This estimating method uses the combined actual working days and non-working days of 5 years' average, and the estimated results are confirmed by being compared with field data. This study is expected to be used in estimating the construction duration of the structural frame during the winter season.

• 월간 기계설비
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• s.245
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• pp.52-59
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• 2010

건설현장에서 올해 1월은 악몽이었다. 신년 벽두부터 내린 폭설로 서울 도심 곳곳은 마비상태에 빠지고 건설현장은 공사를 일제히 중단해야 했다. 폭설 이후 건설현장은 공사 재개까지 3~4일이 걸렸다. 기상청은 올 겨울에도 최소 두세 차례 폭설이 반복될 것으로 내다봤다. 21년 만에 찾아온 최강 규모의 '라니냐 한파'가 폭설과 혹한을 예고하고 있기 때문이다. 본지는 건설현장에서 무사히 겨울나기를 할 수 있도록 동절기 안전 보건 가이드를 게재한다.

• Korean Journal of Construction Engineering and Management
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• v.7 no.1 s.29
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• pp.148-158
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• 2006

Public construction companies have strictly followed a rule that they should not do the works using water such as concrete pouring for the structural frame for a certain period during the winter season. It is usually known that the designated non-working period during the winter causes increase of the project duration and the project cost escalation. The halted work also makes negative effects on national economy because it reduces worker's income. However, the situation would be a lot better if the work for the structural frame is allowed under some conditions. The structural framework done alone without being followed by finish works gives a lot of stresses on the finish works. In this sense, this study examines how the structural framework performed during the winter season affect on the critical path of the finish works. To accomplish the objective of this research, the subnet for the finish works as well as a master network are prepared along with critical paths for a virtual construction site. Using the prepared networks, simulations are carried out to see the effects described above. This study is expected to be used in estimating the construction duration of high-rise apartment housing when the site work for the structural frame should be performed during this period.