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증기양생 조건에 따른 터널 PC 패널의 물리적 특성에 관한 연구
마상준,장필성,신진용,남관우,Ma, Sang-Joon,Jang, Pil-Sung,Shiin, Jin-Yong,Nam, Kwan-Woo 한국터널지하공간학회 2008 한국터널지하공간학회논문집 Vol.10 No.1
Many problems exist in the current cast in place concrete lining used in domestic tunnel construction. Especially, the crack of tunnel lining brings about a social and economic problem. It has a lot of influence on stability of structure and the fine finish of lining. So enormous repair-work and reinforcement of tunnel lining could occur an running out of government's budget. In our country, there are domestic production enterprises which produce a special pre-cast concrete product, but the technical level of them is still far behind compared to developed countries. Also, optimum steam coring method is important for the production of high quality product. But there is no regulation of steam curing method in our country. This study is to investigate the properties of PC panel according to the variation of steam curing conditions such as presteaming time and rate of temperature rise. The result shows that the optimum presteaming time of steam curing method in PC panel is more than 1 hour and the desirable rate of temperature in curing chamber is about $20^{\circ}C/hr$. 국내에서 대부분 시공되어지고 있는 현장타설 콘크리트 라이닝은 여러 가지가 문제점을 나타내고 있다. 그 중에 특히 라이닝의 균열 발생은 사회적 및 경제적인 문제로까지 제기되고 있으며 라이닝의 미관뿐만 아니라 안정성에도 영향을 미치게 되므로 막대한 보수보강 공사비의 지출을 유발해 국가 예산을 소모시키고 있다. 국내 콘크리트 2차 제품 생산업체의 생산기술은 아직 선진국 수준에 미치지 못하며, 고품질 제품 생산에 있어 가장 중요한 증기양생 방법 또한 규정되어 있지 않은 실정이다. 본 연구에서는 터널용 PC 패널의 증기양생조건 중 전양생시간, 온도상승구배를 달리하여 물리적 특성을 검토하였다. 시험결과, 고강도 PC패널의 전양생시간은 최소 1시간 이상이 바람직하였으며 온도상승구배는 최대 $20^{\circ}C$가 물리 역학적으로 가장 우수한 성능을 나타내었다.
대전광역시 옥상녹화 지역의 식생현황 및 토양환경 특성에 관한 연구
이상진(Sang-Jin Lee),박관수(Gwan-Soo Park),이동근(Dong-Kun Lee),장성완(Seong-Wan Jang),박범환(Beom-Hwan Park),이항구(Hang-Goo Lee),윤준영(Joon-Young Yun),장관우(Kwan-woo Jang),이승우(Seung-Woo Lee),이호영(Ho-Young Lee),권오정(Oh-Jung 충남대학교 농업과학연구소 2011 농업과학연구 Vol.38 No.4
This study was to analyze the soil environmental characteristics and vegetation status of green roof in Daejeon Metropolitan City. The investigated floras of vascular plants are 17 families, 26 genera, 28 species in Seo-Gu Daejeon District Office Building (SG), 25 families, 49 genera, 56 species in Galma Public Library (GP), and 34 families, 57 genera, 60 species in Daejeon City Hall (DC) respectively. Although the larger area shows the more numbers of species in introduced plants and naturalized plant, the naturalized plant ratios were similar with each other. They were 10.71%, 10.71%, and 11.67% at SG, GP, and DC respectively. As a result of analysis on soil physical property, soil depths including vegetation soil and drainage soil of 3 green roofs were 30cm. The depths of vegetation soil at SG, GP, and DC were 0∼8cm, 0∼10cm, 0∼10cm respectively. As a results of soil chemical properties of our study, soil pH of vegetation soil and drainage soil were a range of 6.42 and 7.43, and a range of 6.55 and 7.43 on the average respectively. Available-P contents of vegetation soil and drainage soil were a range of 153.33 and 366.33mg/kg, and a range of 136.67 and 242.67 mg/kg which is very high, respectively. Carbon contents in soil at vegetation soil and drainage soil were a range of 3.16 and 6.38%, and a range of 1.63 and 2.47% respectively. Carbon storage per square meter within 30 cm were 2.76 kg, 2.99 kg, and 3.66 kg at SG, GP, and DC respectively.
서울여자대학교 옥상녹화 지역의 식물 종 증감 및 토양환경 특성 변화
이상진 ( Sang Jin Lee ),박관수 ( Gwan Soo Park ),이동근 ( Dong Kun Lee ),이은희 ( Eun Heui Lee ),장성완 ( Seong Wan Jang ),김명희 ( Myeoung Hee Kim ),길승호 ( Sung Ho Kil ),이항구 ( Hang Goo Lee ),장관우 ( Kwan Woo Jang ),박범환 ( 한국환경복원기술학회(구 한국환경복원녹화기술학회) 2013 한국환경복원기술학회지 Vol.16 No.6
This study was carried out to investigate the changes of plant species and soil physicochemical properties on green roofs established at Seoul Women`s University in 2005, 2006 and 2007. The plant species and soil properties were investigated in 2013. The areas of green roof sites ranged 90~100m2. There were floras of vascular plants of 12 families, 20 genera and 22 species in the 2005 site, 24 families, 37 genera and 38 species in the 2006 site, 14 families, 27 genera and 31 species in the 2007 site. The total number of plant species decreased in 2005 and 2006 sites and increased in the 2007 site established. High proportion of dispersal type was barochory in the 2005 and 2006 site, and autochory in the 2007 site. And the proportion of the compositae family was high in the introduced plants over the sites for the all study sites. Average pH and organic matter concentration of green roof soil were ranged from 5.25 to 5.96 and 7.17 to 8.96% in study sites. The organic matter concentration and pH of green roof soil were lower in 2013 than in the three establishment years. Carbon concentration of green roof soil in the three study sites were ranged from 4.16 to 5.30% and total soil carbon in 10cm depth were ranged from 1.57 to 1.98kg/m2.
대전광역시 옥상녹화 지역의 식생현황 및 토양환경 특성에 관한 연구
이상진(Sang-Jin Lee),박관수(Gwan-Soo Park),이동근(Dong-Kun Lee),장성완(Seong-Wan Jang),박범환(Beom-Hwan Park),이항구(Hang-Goo Lee),윤준영(Joon-Young Yun),장관우(Kwan-woo Jang),이승우(Seung-Woo Lee),이호영(Ho-Young Lee),권오정(Oh-Jung 충남대학교 농업과학연구소 2011 Korean Journal of Agricultural Science Vol.38 No.4
This study was to analyze the soil environmental characteristics and vegetation status of green roof in Daejeon Metropolitan City. The investigated floras of vascular plants are 17 families, 26 genera, 28 species in Seo-Gu Daejeon District Office Building (SG), 25 families, 49 genera, 56 species in Galma Public Library (GP), and 34 families, 57 genera, 60 species in Daejeon City Hall (DC) respectively. Although the larger area shows the more numbers of species in introduced plants and naturalized plant, the naturalized plant ratios were similar with each other. They were 10.71%, 10.71%, and 11.67% at SG, GP, and DC respectively. As a result of analysis on soil physical property, soil depths including vegetation soil and drainage soil of 3 green roofs were 30cm. The depths of vegetation soil at SG, GP, and DC were 0∼8cm, 0∼10cm, 0∼10cm respectively. As a results of soil chemical properties of our study, soil pH of vegetation soil and drainage soil were a range of 6.42 and 7.43, and a range of 6.55 and 7.43 on the average respectively. Available-P contents of vegetation soil and drainage soil were a range of 153.33 and 366.33mg/kg, and a range of 136.67 and 242.67 mg/kg which is very high, respectively. Carbon contents in soil at vegetation soil and drainage soil were a range of 3.16 and 6.38%, and a range of 1.63 and 2.47% respectively. Carbon storage per square meter within 30 cm were 2.76 kg, 2.99 kg, and 3.66 kg at SG, GP, and DC respectively.
이상진 ( Sang Jin Lee ),박관수 ( Gwan Soo Park ),김동일 ( Dong Il Kim ),이동근 ( Dong Kun Lee ),길승호 ( Sung Ho Kil ),장성완 ( Seong Wan Jamh ),박범환 ( Beom Hwan Park ),윤준영 ( Jun Young Yun ),장관우 ( Kwan Woo Jang ),이호영 ( 한국환경복원기술학회 2013 한국환경복원기술학회지 Vol.16 No.1
This study was to provide the base data on the status of vegetations and soils in green roofs by analyzing the soil and vegetation characteristics of 4 green roofs in Dongguk University in September 2012. Sanglokwon(SW), Dongguk Hall(DH), University Library(UL), and Information and Culture Hall P(IC) were established in 2005, 2008, 2009, and 2010, respectively. The areas of green roofs were 700m2, 2,300m2, 1240m2, and 640m2 in SW, DH, UL, and IC respectively. The investigated floras of vascular plants were 26 families, 55 genera, 65 species in Snglokwon(SW), 53 families, 99★ genera, 112 species in Dongguk Hall(DH), 43 families, 77 genera, 84 species in University Library(UL), and 41 families, 71 genera, 75 species in Information and Culture Hall P(IC), respectively. A positive correlation is shown between the number of plant species and planting area. Total nitrogen, organic matter, and potassium in soil have positive correlation with the number of plant species. The number of plant species was proportional to area and increased more than twice after planting. About a quarter of the invaded plants (including native and naturalized species) were naturalized plants. The total soil depths including vegetation soil and drainage soil at SW, DH, UL. and IC were 20cm, 10cm, 10cm, and 8cm, respectively, The depths of vegetation soil at SW, DH. UL, and IC were <7cm, <3cm, <2cm, and <2cm respectively. The soil pH in vegetation soil ranged from 5.22 to 5.36, and from 6.13 to 6.39 in drainage soil. Available-P concentration ranged from 10.17 to 18977rng/kg in vegetation soil and from 6.70 to 81.17mg/kg in drainage soil. Carbon concentration in vegetation soil ranged from 2.93 to 9.70%, and 2.93 to 9.70% in drainage soil. Carbon contents in 20cm, 10cm, 10cm, and 8cm soil depths were 2.62kg/m2, l.89kg/m2, 0.SOkg/m2, and 0.53kg/rn2 at SW, DH, UL, and IC, respectively.