• 한국지반환경공학회 논문집
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• 제13권10호
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• pp.85-94
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• 2012

최근의 건설공사는 개발사업의 증가와 국토의 효율적 개발에 의해 인접시설물과의 충분한 이격거리를 확보하지 못하고 공사를 진행하는 경우가 점차 증가하고 있다. 본 연구에서는 초고층빌딩 개발을 위한 지반 굴착공사와 철도시설 공사가 비슷한 시기에 수행된 지역에서 발생한 인접 철도시설물의 피해사례를 소개하고, 지층 특성과의 상호작용을 고려한 효율적인 보수 보강이 시행된 사례를 소개하고자 한다. 이를 위해 철도시설물 시공 시와 초고층빌딩 시공을 위한 굴착 공사 시 각종 현장조사 및 시험들이 수행되었으며, 이를 토대로 철도시설물과 선로의 침하 원인 분석이 시행되었다. 추가적으로 지반의 공극 충진을 통한 지반보강과 철도구조물의 침하복원을 위해 마이크로 시멘트를 적용한 보강 그라우팅 공법이 수행되었다.

• Corrosion Science and Technology
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• 제11권3호
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• pp.77-81
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• 2012

Cathodic protection(CP) is widely used as a means of protecting corrosion for not only marine structures like ship hulls and offshore drilling facilities, but also underground structures like buried pipelines and oil storage tanks. The principle of CP is that the anodic dissolution of metal can be protected by supplying electrons to the cathode metal. When unprotected structures are nearby to CP systems, interference problems between unprotected and protected structures may be happened. The stray current interference can accelerate the corrosion of nearby structures. So far many efforts have been made to reduce the interference in the electric railway systems adjacent to the underground metal structures like buried pipelines and gas/oil tanks. During recent few decades the protection technologies against stray current induced corrosion have been significantly improved and a number of techniques have been developed. However, there is very limited information an marine environments. Some complex harbor structures are protected by two cathodic protection systems, i.e. sacrificial anode cathodic protection(SACP) and impressed current cathodic protection(ICCP). In this case, when the protection current from sacrificial anodes returns to the cathode through electrolyte, it passes through nearby other low resistance metal structures. In many cases the stray current of ICCP systems influences the function of SACP. In this study, the risk of stray current from the SACP system to adjacent reinforced concrete structures has been verified through laboratory experiments. Concrete and steel pile structures modeled a part of bridge have been investigated in terms of CP potential and current between the two. The variation of stray current according to the magnitude of ICCP/SACP has been studied to mitigate it and to suggest the proper protection criteria.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• 제1권1호
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• pp.41-51
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• 2020

Ground beetle fauna of Wangpi-cheon watershed in Yeongyang-gun to Uljin-gun, Gyeongsangbuk-do was investigated from May to October in 2012. Ground beetles were collected by pitfall trapping. A total of 38 species of 20 genera belonging to 8 subfamilies were identified from 2,486 collected ground beetles. Species richness was high in Pterostichinae (16 species), Carabinae (8 species), Harpalinae (5 species), Callistinae (3 species), Nebriinae (3 species) and others (1 species). Dominant species were Synuchus cycloderus (1,025 individuals) and Aulonocarabus seishinensis seishinensis (332 individuals), Pristosia vigil (133 individuals), and Coptolabrus smaragdinus branickii (117 individuals) in order. Monthly changes in abundance of upper dominante genera Pterostichus, Aulonocarabus, Coptolabrus species and Synuchus, Pristosia, Colpodes species showed that the former had the highest number in August whereas the latter increased in June and September. The genus Pterostichus species were preferred in deciduous forest in Wangpi-cheon watershed, while the genus Synuchus species were collected in mixes forest adjacent to farmland and recreation facilities and the genera Chlaenius, Harpalus species were collected in mixes forest adjacent to farmland nearby stream. Non-metric multidimensional scaling (NMDS), ground beetles and sites could be divided into two distinct groups: St. 1, St. 2, St. 3 group and St. 4 group. Some species such as Pterostichus orientalis orientalis, P. vicinus and P. bellatrix were particularly abundant at St. 4.

• 한국환경보건학회지
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• 제45권5호
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• pp.474-486
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• 2019

Objectives: This study was performed to investigate the emission characteristics of aldehydes emitted by the printing industry and to evaluate their impact on adjacent residential areas. Methods: Aldehydes and THC were measured from the front of the control device in the printing and coating process. Aldehydes and ketones were measured by workplace area, residential area, and background area to evaluate their impact. Results: The concentrations of formaldehyde (<0.047 ppm) and acetaldehyde (<0.068 ppm) in the printing and coating process were relatively low, and the methyl ethyl ketone used as the primary solvent was the main carbonyl compound in the printing process. The daily mean concentrations of formaldehyde and acetaldehyde were not significantly different by workplace area, residential area, or background area. However, the concentration of methyl ethyl ketone was high in the order of workplace area, residential area, and background area. Conclusions: The concentrations of formaldehyde and acetaldehyde in the adjacent residential areas are considered to be more influenced by secondary sources of photochemical reactions than by primary sources. Methyl ethyl ketone is considered to be highly influenced by the primary source, which is printing facilities.

• 농촌계획
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• 제30권3호
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• pp.1-8
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• 2024

This study focused on quantifying fugitive dust levels around rural village adjacent near a stone quarry, specifically examining the influence of quarry operations and gravel transport vehicles on road dust dispersion. For this purpose, fugitive dust concentration monitoring was conducted to understand the impact of gravel transport vehicles operating through the quarry area on the generation of road dust. Gravimetric analysis indicated substantial increases in Total Suspended Particulate (TSP) concentration (5.8 times), PM-10 (3.6 times), and PM-2.5 (2.0 times) during quarry operations on the quarry transport road. Real-time monitoring during dump truck operation revealed average dust concentrations of TSP 566.8 ㎍/m³, PM-10 174.8 ㎍/m³, and PM-2.5 55.3 ㎍/m. This indicates a significant increase compared to non-operation periods, with TSP concentration rising by 5.8 times, PM-10 concentration by 3.6 times, and PM-2.5 concentration by 2.0 times. Significantly elevated dust levels were observed at the village entrance road and quarry transport road during quarry operations, with PM-10 exceeding regulatory limits by 2.2 times and PM-2.5 exceeding limits by 1.9 times on the quarry transport road. Especially, particles with a diameter greater than 10 ㎛ exhibited a meaningful increase during dump truck transportation. Considering these findings, the study recommends implementing dust mitigation measures, including the introduction of dust barriers, screens, and wheel washing facilities for quarry-bound dump trucks.

• 한국방재안전학회논문집
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• 제16권1호
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• pp.61-70
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• 2023

본 연구에서는 수소저장시설의 폭발에 대한 시설물의 안전성 평가를 위하여 수소 폭발에 의한 발생된 충격파의 효과와 그에 따른 구조물의 손상도 평가에 대한 해석적 연구를 수행하였다. 이를 위하여 수소저장시설의 폭발효과에 미치는 주요 설계변수로 수소저장시설의 부피(10~50,000 L), 잔존용량(SOC, 50% 및 100%) 및 초기 압력(50 MPa 및 100 MPa)을 고려하여 폭발 시나리오를 수립하였다. 수소폭발효과를 도출하기 위하여 수소의 기계적 에너지와 화학적 에너지를 고려한 TNT 등가량 산정방법을 활용하였다. 환산된 TNT 등가량에 대하여 기존 UFC 3-340-02의 Kingery-Bulmash 폭발하중 설계차트를 개선한 평가식을 적용하여 수소 폭발 모델을 제안하였다. 수소 폭발 모델은 거리별 압력과 충격량에 대하여 지난 수소 탱크의 폭발실험 결과와 비교하여 검증되었다. 검증된 수소폭발 모델을 활용하여 시나리오에 따른 변수해석을 수행하였으며 폭발 중심으로부터의 이격거리에 따른 압력과 충격량에 대한 설계차트를 제시하였다. 더욱이 이 압력과 충격량 설계차트와 압력-충격량(PI) 다이어그램을 활용하여 압력과 충격량의 수준에 따른 구조물의 미세손상, 주요부재손상 및 부분 붕괴의 3단계 손상도와 이격거리에 따른 설계차트를 제안하였다.

• 토지주택연구
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• 제3권2호
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• pp.117-126
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• 2012

본 연구의 목적은 점차 활성화되고 있는 입체복합개발의 공공 참여를 위한 입지여건을 분석하는 것이며, 이를 통해 앞으로 새로운 도시개발이나 도심재생사업, 역세권개발 등에의 수요에 대응하고 도시의 활성화에도 기여하려는 것이다. 입체복합시설의 개발을 위한 입지특성과 공공의 참여여건을 고려하여 대상범위와 입지여건을 분석한 결과, 입체복합개발에 부합하는 다양한 기능의 수용여부를 고려한 기능복합도의 경우 대규모 도시개발지의 중심상업지역 및 신설역사주변과 기성시가지의 도심이 적합하다고 판단된다. 개발잠재력도 앞의 세 지역과 함께 기성시가지의 역세권 및 도심부적격시설의 이전적지가 높은 것으로 판단된다. 개발규모는 대규모 신규도시개발지의 중심상업지역, 기성시가지의 도심, 부도심, 역세권이 필지, 블록, 지구 등 다양한 규모의 개발이 가능하다. 또한 입체복합개발에 대한 공공의 참여여건 분석결과, 공공부문이 개발하는 대규모 신규도시개발지의 중심상업지역과 도심부적격시설 및 공공기관종전부지 등 이전적지가 적합하게 나타났다. 이는 공공시행자로서 민간과의 협력을 통한 도시의 조기성숙과 개발촉진을 도모하고, 도시부적격시설의 이전과 적지개발사업의 연계를 통한 도시환경개선 및 공공성 제고에도 기여할 수 있을 것이다.

• 한국조경학회지
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• 제30권6호
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• pp.109-118
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• 2003

This design is for the landscape of Busan Yeonje Post Office. The design requirements were: the preparation of an open space, the expression of regional identity, total design concept, and application of environmentally-friendly materials. The Busan Yeonje Post Office is not a just post office building but also a place for people including a communications center, rental offices, and a post office, facilities which require publicity, functionality, and symbolism. Therefore, this design reflected the design requirements, and considered the following to include the theme of "Pleasant messages and a pleasant post office with vitality and comfort. First, the open space was to be increased in the adjacent public vacant lot and street park by pulling back the construction line. In this way, the publicity, accessibility, and spatiality of the prepared open space were strengthened. Second, a sense of place for the landscape was expressed through the image of a wave representing Busan, a coastal town. Recognition of the space was strengthened, while regional identity and the concept of transmission of information were expressed. In addition, Citrus junos Sieb., representing 'Happy news' was Planted as a symbolic tree to denote a meaningful resting Place. Third, with respect to the design of reception facilities, considering the general purposes of the construction, post office stamps, envelopes, and postal delivery persons were portrayed on the walls, decorative walls, and environmental formations respectively The flooring was decorated with stamps and waves in keeping with of the total design concept. Fourth, to select environmentally-friendly materials, soil block and eco-grass block were introduced as major paving materials, and folk kinds of trees were included on site. According to the aforesaid plans, the researcher attempted to convert the public agency and office space characterized by feelings of dullness and rigidity into a soft and vivid outdoor space. It is expected that the location will be an open place in the downtown area and be recognized as a 'shared' space for citizens of Yeonje-gu.

• 한국주거학회논문집
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• 제1권2호
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• pp.49-66
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• 1990

This study is a case study to grasp residents` trade-off preference and opinions for selected interior environmental attributes of muilti-family housing. Interiew with structured questionnaire was carried out through pilot and main survey. On the basis of the result of pilot survey, interior environmental attributes for the main survey were selected. Selected attributes were the size of each residential room, the degree of openness between two rooms and interior facilities. Among them, trade-off approach was applied to the size of each residential room and interior facilities. For the main survey. 45 housewives living in 31 pyung apartment of a selected construction company to grasp the residents` trade-off preference and opinions on the selected attributes. In terms of the size of each room, subjects wanted the room to be lager, whereas master bedroom smaller, and family bathroom larger, wheareas toilet near master bedroom smaller. In terms of the degree of openness between two rooms, the present degree of openness between private and service area such as living room and balcony, and second bedroom and adjacent balcony need to be more open, whereas the present degree of openness between living room and dining room and between living room and kitchen need to be more closed. The comparative orders of important intems were the ventilation facility in the bathroom, drying poles for clothes in the balcony, interior landscape, and workable for hand washing clothes. In conclusion, measurement of preference using trade-off approach about selected interior environmental attributes in post-occupancy evaluation was regarded as a promising evaluation method to grasp the practical and comparative preference under constraints comparing to the typical existing methods.

• 한국환경복원기술학회지
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• 제18권2호
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• pp.19-32
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• 2015

In Korea, significant riparian areas have been developed due to river maintenance projects. Introduction of new riparian facilities can negatively affect wildlife in the riparian areas. This study focuses on selecting core conservation areas for Eurasian Otter(Lutra lutra) to support decision making process for development of riparian areas. For the study, first of all, field data of study site were collected by field surveys. Secondly, stream naturalness was assessed to understand physical environments of the study sites. Thirdly, habitat suitability was assessed using occurrence data of Eurasian Otter and environmental data. Lastly, core areas for conservation was selected by comparing and synthesizing stream naturalness map and habitat suitability map. The selected core areas showed several characteristics. The number of artificial facilities is low in the core areas. Rocks which are preferred by Eurasian Otter to eat and excrete are plentiful in the core areas. Also, the ratio of adjacent farmland is high. Based on the analyses, it is expected that this study can contribute to decision making process for environmental spatial plans to better conserve habitats of Eurasian Otter.