• 제목/요약/키워드: Settlement system

검색결과 997건 처리시간 0.025초

토목섬유로 보강된 폐기물 매립지반의 지지력 특성 (Bearing Capacity of Waste Landfill Reinforced by Geosynthetics)

  • 신은철;박정준
    • 한국지반신소재학회논문집
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    • 제6권3호
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    • pp.39-46
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    • 2007
  • 세계적으로 폐기물의 발생량이 급증하여 매립지의 숫자가 급증하고 있으나 사용이 완료된 매립지의 처리에 많은 어려움이 있다. 특히, 도시 폐기물 매립지는 인구밀집 지역과의 근접성, 부지개발에 따른 경제적 가치의 급등 등의 이유로 활용 가능한 새로운 건설부지로서 많은 관심이 집중되고 있다. 그러나, 폐기물 매립지반 위에 구조물을 축조할 경우, 특별한 안정처리 및 보강처리를 하지 않은 경우, 지반침하, 구조물에 대한 지지력 확보 등에 문제점이 발생될 수 있다. 따라서, 본 연구에서는 폐기물 매립지반위에 구조물을 축조할 경우, 지오그리드 및 지오셀의 보강 효과를 규명하고자 반복평판재하시험을 수행하여 주요 영향인자인 지지력증가비, 지반계수, 스프링상수, 탄성회복율 등을 평가하였다.

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모형챔버시험을 이용한 사질토 지반의 경량포장체용 기초의 하중전달 특성 (Load Transfer Characteristics of Pile Foundation for Lightweight Pavement in Sand Soil using Laboratory Chamber Test)

  • 신광호;황철비;전상렬;이관호
    • 한국산학기술학회논문지
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    • 제15권7호
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    • pp.4588-4594
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    • 2014
  • 본 연구에서는 연약지반에서의 경량콘크리트포장을 적용할 때의 안전성 평가를 위해 실제 포장체 사이즈의 1/30으로 축소한 모형을 이용하여 모래지반에서 실험을 실시하였다. 모형토조를 이용하여 지반을 조성하였고, 표준 말뚝재하시험(완속재하시험방법)을 이용하였다. 수직하중이 적용되는 말뚝기초의 슬래브의 중심에서 가까운 순으로 Case A, Case B, Case C로 구분하였고, 각각의 말뚝의 간격은 8cm로 하였다. 말뚝기초 모형시험결과 사질토지반에서 수직하중을 1.5kg에서 12kg로 증가시킬 때 포장체가 전체적으로 침하하였고, 최대 침하량은 0.4mm로 측정되었다. Case A의 경우 압축력을 받는 것으로 나타났으며, Case B는 수직하중이 증가함에 따라 말뚝에 압축력과 함께 인장력도 같이 받는 것으로 보이며, Case C는 하중단계가 증가할수록 인장변형이 증가하는 경향을 나타내었다.

자연친화형 연약지반개량공법을 위한 천연섬유배수재의 특성 연구 (Characteristics of the Natural Fiber Drain Board for Environmentally Friendly Soil Improvement Method)

  • 김주형;조삼덕;장연수;김수삼
    • 한국환경복원기술학회지
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    • 제9권1호
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    • pp.1-13
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    • 2006
  • The recent environmental protection issue has diminished the supply of sand for soft ground improvements so much that the prices of sand have shown a sudden rise. Plastic material is one of substitutes for sand material, but plastic is nonperishable and doubtable if it has potential environmental hormone disrupting substances. Moderate-priced natural fiber drain board made with coconut coir and jute filter are in the spotlight recently as an alternative material for sand and plastic drain board etc. Natural fiber drain has not only competitive price but also a characteristic of assimilation into the soils after finishing of its own function. Discharge capacity of the fiber drain board evaluated by triaxial type discharge capacity test was relatively lower than that of plastic drain board. Nevertheless, settlement and pore pressure dissipation behaviors of the fiber drain board and the plastic drain board which were installed in the clayey soil during the composite discharge capacity test were almost similar. It was also found that biodegradation of the fiber drain board was in progress until 18 month after installation in the clayey soil, but they had still enough engineering properties to use at field.

FTA 체결에 따른 전자원산지증명서 활성화 방안 (e-C/O under FTA)

  • 이창숙;김종칠
    • 통상정보연구
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    • 제15권3호
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    • pp.475-498
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    • 2013
  • FTA를 체결하는 가장 근본적인 이유는 FTA 체결국 상호간에 특혜관세를 적용받기 위해서이다. 특혜관세 적용을 받기 위해서는 협정에서 규정하고 있는 원산지결정기준을 충족해야 할 뿐만 아니라 이를 입증하는 원산지증명서가 반드시 있어야 한다. 한국 관세청에서는 전자통관시스템(UNI-PASS)과 원산지관리시스템(FTA-PASS)을, 대한상공회의소에서는 무역인증서비스를 제공하여 전자적으로 원산지증명서를 발급할 수 있는 환경이 마련되어 있다. 하지만 여전히 FTA 특혜원산지증명서 발급이 특혜 적용으로 인한 가격경쟁력 향상 보다는 주로 거래처의 요청에 의해 발급되고 있는 실정이다. FTA 체결국가가 증가함에 따라 FTA의 효과를 극대화 시킬 수 있도록 전자원산지증명서 발급의 정착 및 활성화가 시급하다. 따라서 본 연구에서는 현행 우리나라에서 제공하고 있는 전자원산지증명서 발급시스템 구축현황을 검토한 후 이에 대한 문제점을 실무적 측면과 시스템적 측면으로 나누어 파악하고 이에 대한 개선방안을 제시하고자 하였다.

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화강풍화암에 시공된 부분현장타설말뚝의 IGM이론의 적용성 (Applicability of IGM theory Partial Drilled Shaft constructed on Granite Rocks)

  • 안태봉
    • 한국철도학회논문집
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    • 제16권5호
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    • pp.379-385
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    • 2013
  • 본 연구에서는 IGM 구간에서 주면마찰력을 활용하여 지지력을 확보하기 위해 선단부에만 부분적으로 현장타설말뚝을 시험시공하고 IGM 이론의 적용성을 분석하였다. 시험시공 현장의 지반조사와, 교란여부, 거칠기 상태를 측정하여 IGM 이론 적용을 위한 지반특성을 점성, 비교란, 매끄러운 상태로 분석하였다. 또한, 정재하시험 및 하중전이시험을 통해 허용지지력과 심도별 주면마찰력을 산정한 결과, 주면마찰력은 심도가 깊어질수록, 기준침하량이 클수록 증가하는 것으로 평가되었으며, 심도와 매우 높은 상관성을 보였다. 일축압축강도($q_u$)는 점성 IGM에서 가장 중요한 변수이나, 화강풍화암 구간에서 직접 측정이 불가능하므로 정재하시험 및 하중전이시험 결과와 N값을 이용하여 $q_u$값을 얻을 수 있었다.

Application of Remote Sensing and GIS technology for monitoring coastal changes in estuary area of the Red river system, Vietnam

  • Lan, Pham Thi;Son, Tong Si;Gunasekara, Kavinda;Nhan, Nguyen Thi;Hien, La Phu
    • 한국측량학회지
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    • 제31권6_2호
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    • pp.529-538
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    • 2013
  • Coastline is the most dynamic part of seascape since its shape is affected by various factors. Coastal zone is an area with immense geological, geomorphological and ecological interest. Monitoring coastal change is very important for safe navigation, coastal resource management. This paper shows a result of monitoring coastal morphological changes using Remote Sensing and GIS. Study was carried out to obtain intensity of erosion, deposition and sand bar movement in the Red River Delta. Satellite images of ALOS/AVNIR-2 and Landsat were used for the monitoring of coastal morphological changes over the period of 1975 to 2009. Band rationing and threshold technique was used for the coastline extraction. Tidal levels at the time of image acquisition varied from -0.89m to 2.87m. Therefore, coastline from another image at a different tidal level in the same year was considered to get the corrected coastline by interpolation technique. A series of points were generated along the coastal line from 1975 image and were established as reference points to see the change in later periods. The changes were measured in Euclidean distances from these reference points. Positive values represented deposition to the sea and negative values are erosion. The result showed that the Red river delta area expanded to the sea 3500m in Red river mouth, and 2873m in Thai Binh river mouth from 1975 to 2009. The erosion process occurred continuously from 1975 up to now with the average magnitude 23.77m/year from 1975 to 1989 and 7.85m/year from 2001 to 2009 in Giao Thuy area. From 1975 to 2009, total 1095.2ha of settlement area was eroded by sea. On the other hand, land expanded to the sea in 4786.24ha of mangrove and 1673.98ha of aquaculture.

한국 치유농업의 현황 및 특성 분석 (Analysis on the Present Status and Characteristics of Agro-healing in Korea)

  • 김경미;문지혜;정순진;이상미
    • 농촌지도와개발
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    • 제20권4호
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    • pp.909-936
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    • 2013
  • 이 연구는 최근 네덜란드와 벨기에 등 농업분야 선진국에서 관심과 투자가 증대되고 있는 치유농업(Agro-healing)의 개념을 정립하였고, 우리나라 치유농업의 현황 및 특성 분석을 통해 발전 방안을 제시하였다. 연구목적 달성을 위해 치유농업 선진국의 정책과 제도, 조직, 관련 법, 인력 등에 대한 문헌분석(내용분석)을 하였으며, 농업, 건강, 교육, 원예 및 동물 매개치료, 민간, 농업정책 집행 분야별 전공 교수, 연구원, 대표 및 담당자 9인으로 구성된 전문가 포커스 그룹 인터뷰를 진행하였다. 또한 치유농업 분야 종사자 165명을 대상으로 설문조사를 실시하였다. 연구결과 우리나라 치유농업의 개념은 '농업 농촌자원(식물, 동물, 농촌환경, 농촌문화) 또는 이와 관련된 활동 및 산출물을 통하여 모든 국민의 심리적 사회적 신체적 인지적 건강을 도모하는 산업 및 활동'으로 정의하였으며 정립된 개념과 연계하여 치유농업의 목적, 자원, 대상을 설정하였다. 또한 우리나라 치유농업의 정착과 발전을 위한 제언을 제시하였다.

한국(韓國) 근대기(近代期) 내륙지방(內陸地方) 도시주택(都市住宅)의 유형(類型)과 변천(變遷)에 관한 연구(硏究) (A Study on the Types and Changes of the Urban Houses in the Korean Inland during the Period 1910-1945)

  • 김태영
    • 건축역사연구
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    • 제7권3호
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    • pp.53-66
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    • 1998
  • In the meantime, the study of traditional and contemporary house had been produced so many achievements in korea, but modern house is yet to be solved, Accordingly, It is necessary to develop and present the basic research data in order to build up an objective study for urban house in the modern age(1910-1945), Following to a study on the foreigner's house in grid-type settlement of Open Ports, in this research is to investigate and analyze modern houses of urban areas in korean inland, and then clarify types and changes of them. In the first year($1995{\sim}96$), the modern houses of Central Inland Districts(arrounding river Kumgang)-Kunsan kanggyong Puyo Kongju Pugang Chongju were investigated by the layout of room, the construction and materials, the design and style, etc. In the second year($1996{\sim}97$), the modern houses of Open Market(開市場)-Seoul Taegu Kwangju Taejon Chonju were conducted to investigate as above. The traditional house transformed by differentiation and addition of room(kan), the various types were respectively adopted for the korean reforming and western cultural house. In the layout of room, the types of plan were gradually concentrated from the single wings of korean traditional house. The korean traditional house was later improved through the introduction of entrance, corridor, and internal toilet/bathroom. But the korean under-floor heating system(andal) and a series of three rooms had been entirely maintained, composed of master bedroom/living room(daechung)/room. And the traditional town house with shop and storage, being built closely to each other and walled up both sides, it had taken gradually the extensive characteristics in itself. By the displacement of shop/dwelling/ storage. the various types were respectively adopted for the separated, multi-storied, and complex type. The type of them was gradually changed to the narrow and linear form. And so with the stockpile of fundamental datas about modern houses in korean urban areas, we expect these results contribute to the knowledge of the spatial characteristics of urban house at present which are required to the understanding of transition as well as types.

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우리나라의 건설중재 현황과 활성화 방안 (The Current Situation of Construction Arbitration and Suggestions to Increase its Use in Korea)

  • 채완병
    • 한국중재학회지:중재연구
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    • 제14권2호
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    • pp.243-279
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    • 2004
  • The construction arbitration field has developed considerably since the latter half of the 1990s. Through analysis of construction arbitration cases taken up by KCAB, this paper intends to show the present condition and the improvement direction of construction arbitration in Korea. The number of construction arbitration cases filed at KCAB has been increasing rapidly after 1997, but recently the rate of increase has tended to decline. From 2000 to 2003 the number of arbitration cases increased 23% each year, on average, but in 2003 the increase was only 7.6%. In the very beginning, public construction claims made up the majority of all construction cases, however, civil construction claims are increasing gradually. The arbitration amount in the construction field is very high, owing to public construction claims. For example, the arbitration amount per case was 5 billion won, on average,. in the public construction field. It is shown that the claimants of arbitration are mostly constructors and the main reasons for making claims are to demand payment for construction and payment for additional work. KCAB investigated the performance status of arbitration awards. The voluntary performance rate for awards in construction arbitration is nearly 80% and in 11%, a suit was filed to appeal the arbitration award. In spite of the development of construction arbitration, some improvements are requested. There have been arguments about the effectiveness of selective arbitration agreement in the General Terms of Construction Contract. This has caused a decrease in arbitration cases, so improvements in this dispute settlement clause need to be made. Enforcement of arbitration awards is granted by the judgment of a court. Resulting from this, appeals for arbitration awards are not allowed, however, up to three appeals for the enforcement of awards are allowed in court. As such, the enforcement system for arbitration awards needs to be improved and simplified.

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스포츠분쟁해결기구로서의 스포츠중재재판소(CAS)에 관한 고찰 (An Overview for the Court of Arbitration for Sport (CAS) as the Authority to Settle the Sports-related Disputes)

  • 손창주
    • 한국중재학회지:중재연구
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    • 제28권1호
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    • pp.43-75
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    • 2018
  • The Court of Arbitration for Sport (CAS) was created to focus on the procedural complexity in the resolution of sports-related disputes, confidentiality, the matter of expenses, and the necessity of prompt settlement in the field of international sports. The CAS had originally launched as one of bodies of International Olympic Committee (IOC), but later it became properly operational as an independent organization to facilitate sports-related disputes when the International Council of Arbitration for Sport (ICAS), which came into force in accordance with the Paris Agreement in 1984 and has acted in place of IOC, took responsibility for the administration and financing of the CAS. The CAS is composed of four divisions, the Ordinary Arbitration Division and the Appeals Arbitration Division, the Ad hoc Division created later in 1996 and the CAS Anti-Doping Division (CAS ADD) established as from 2016 only to conduct proceedings and to issue decisions on an alleged anti-doping rule violation, and two (Sydney and New York) permanent decentralized offices. The head office of the CAS is Lausanne, Switzerland. Since CAS ADD was established, CAS Ad hoc Division has had jurisdiction over the appeal case against a decision pronounced by the IOC, an NOC, an international Federation or an Organizing Committee for the Olympic Games. Although there are so many virtues of CAS as a resolution authority for sports-related disputes in terms of its organization, arbitration rules and procedures, it is also true that the CAS has not been showing the consistency. The CAS should overcome these issues through much more advanced system and its instant and fair decisions.