• 자원리싸이클링
• /
• 제17권2호
• /
• pp.55-62
• /
• 2008

산업화 과정에서는 항상 폐기물이 발생하며 그 양은 점차 증가하고 있다. 2003년 생활 및 사업장 폐기물은 전년대비 9.5%의 증가추이를 보인 반면, 건설 폐기물은 전년대비 21.0%의 높은 증가 추이를 보였다. 현재 전체폐기물 중 건설 폐기물은 50%에 육박하며, 그 중에서도 폐콘크리트와 폐아스콘이 73%를 차지하고 있다. 이에 더하여 지금까지 풍부한 천연자원으로만 여겨졌던 골재의 양이 점차 줄어들고 있어, 건설 폐기물 재활용의 필요성은 더욱 강조되고 있다. 재생골재의 활용은 막대한 건설폐기물의 처리를 용이하게 함과 동시에 골재채취로 인한 환경파괴는 물론 부족한 신규골재를 대체할 수 있는 효과를 가진다. 본 연구는 건설 폐기물중 배출량이 상대적으로 많은 폐아스콘을 중심으로 재활용 경제성 분석을 위해 비용/편익 모형을 사용하였으며, 신규골재와 재생골재간의 비용 비교만을 수행하였다. 이 식을 이용하여 2003년과 2004년을 기준으로 한, 수도권 지역 내 아스콘에 대한 재활용 경제성을 평가해 본 결과, 2003년의 0.0694보다 2004년이 0.0805로 더 높게 나타났다. 두 자료만으로 결론을 내릴 수 없으나, 이는 건설부문에서 아스콘의 재활용 가치가 높아짐을 반증하고 있다고 사료된다.

• 건축구조
• /
• 제14권4호
• /
• pp.79-86
• /
• 2007

Underground space development is more active on the latest date. Currently, we construct an connecting tunnel Euljiro underground shopping-area in seoul. we select DSM, considering geological condition and construction efficiency. The numerical analysis is performed with PENTAGON-3D and MIDAS CIVIL This paper will introduce the Earth Tunnel Method and make an examination possible to apply downtown weak ground.

• 한국콘텐츠학회논문지
• /
• 제9권1호
• /
• pp.15-22
• /
• 2009

본 논문에서는 전통 건축을 위해 사용되었던 흙건축 재료와 관련된 정보를 웹 환경에서 관리하고 검색할 수 있도록 하기 위한 웹 기반 정보서비스의 설계 및 개발에 대하여 기술한다. 전통흙건축재료 정보서비스는 특히 고문헌 자료를 바탕으로 하므로, 일반 사용자가 이해하기 어려운 전문 한자 용어 중심의 데이터를 기반으로 정보 검색이 수행되는 불편을 최소화시킬 수 있는 방안이 요구된다. 또한 자료 수집 및 분석이 데이터베이스 구축과 병행되므로 데이터의 확장성에 대한 고려가 필요하기도 하다. 본 논문에서는 전통흙 건축재료를 위한 정보서비스의 설계 및 개발 과정에서 주요 이슈들을 도출하고 이를 해결하는 여러 방안들을 제시한다.

• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 2009년도 춘계 학술발표회
• /
• pp.874-882
• /
• 2009

Continuous monitoring of dam performance is essential to earth and rockfill dams safety because it has to be guaranteed for safety during construction period of course and from initial impounding to a long term maintenance period of dam. Among the 31 dams managed by Kwater at present, the proportion of dams being over 20 years after completion of construction is 42% and it is estimated that the loss rate of monitoring devices will be increase as times. Monitoring devices would be impossible to repair since those are mostly installed in the dam body and foundation. If repairing of monitoring devices is possible, the expenditure will be expensive. Therefore reasonable decision making for abandonment, repair and alternation for loss of monitoring devices would be needed through the establishment of key instrument for earth and rockfill dam safety. In this study the process of monitoring for safety were modeled by failure modes of dams, adverse conditions related to failure mode, indicators of adverse condition and monitoring devices The relationship between failure mode and monitoring devices were systematically analyzed and established and evaluation technique for qualifying the importance of monitoring devices were presented.

• 한국지반공학회지:지반
• /
• 제2권1호
• /
• pp.45-54
• /
• 1986

보강토잡벽에 대한 합리적인 설계 및 시공방법에 관한 경험적인 자료를 제홍하기 위하여 실내 모형실험이 실시되었다. 본 모형실험에서는 각 축조 단계에서의 보강재의 인장력 변화를 보강재상에 부착된 스트레인 게이지에 의하여 계측되었다. 또한 다이알게이지에 의하여 보강토파벽의 수평이동이 측정되었고, 도건의 붕괴형태가 조사되었다. 모형실험에서 측정된 값들은 보강토옹벽에 대한 기존 연구 결과와 비교.논의하였다. 본 모형실험의 중요한 결과는 보강재의 인장력이 벽면가까이에서 최대가 되어 비선형적으로 변화하며, 벽체에 연결된 보강재가 전류에 대한 안정성을 증가시킨다.

• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 2010년도 추계 학술발표회 3차
• /
• pp.11-17
• /
• 2010

Numerical analysis was carried out in order to simulate the development of the large deformation that took place on the reinforced earth wall, a part of the Tottori expressway planned to pass Hyogo, Japan. Since this reinforced earth wall had experienced unexpected deformation of the wall during construction, the wall was re-constructed twice. However, the wall deformation showed no sign to cease even at the final stage of the construction. Countermeasures to re-stabilize the wall were demanded. In part I of this paper, it was manifested that subsidence of a 3-meter weak soil due to seepage flow was responsible for the large deformation. A part of concrete panel wall was severely damaged due to extremely large pulling force of geotextile induced by the hammock state. As for the countermeasures, "grouting with slag system" was applied to fill voids of the backfill, and also to prevent further development of settlement in the weak soil layer. "Ground anchor" was also considered to achieve the prescribed factor of safety.

• Structural Engineering and Mechanics
• /
• 제87권1호
• /
• pp.19-28
• /
• 2023

This paper describes the experimental investigation of steel pallet rack beam-to-column connec-tions. Total behavior of moment-rotation (M-φ) curve and the effect of particular characteristics on the behavior of connection were studied and the associated load strain relationship and corre-sponding failure modes are presented. In this respect, an estimation of SPRBCCs moment and rotation are highly recommended in early stages of design and construction. In this study, a new approach based on Support Vector Machines (SVMs) coupled with discrete wavelet transform (DWT) is designed and adapted to estimate SPRBCCs moment and rotation according to four input parameters (column thickness, depth of connector and load, beam depth,). Results of SVM-WAVELET model was compared with genetic programming (GP) and artificial neural networks (ANNs) models. Following the results, SVM-WAVELET algorithm is helpful in order to enhance the accuracy compared to GP and ANN. It was conclusively observed that application of SVM-WAVELET is especially promising as an alternative approach to estimate the SPRBCCs moment and rotation.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2011년도 춘계학술대회 논문집
• /
• pp.1750-1756
• /
• 2011

After Kyoto Protocol was adopted for green gas reduction, each nations are stepping up efforts to reduce $CO_2$ of a typical green gas. Construction industry also is trying $CO_2$ reduction with the techniques of two types which are software and hardware techniques. The software technique are Passive Design considered green gas emission and the environment impact assessment by LCA. The hardware techniques are adjustment of equipment system and development of eco- friendly material. But, it is nonexistent that a study related to $CO_2$ emission considered detail process in construction industry. This study analyzed the relativeness of equipment combination and $CO_2$ emission by calculate $CO_2$ emission follow to equipment combination on earth-work which is the process emitted most $CO_2$ among railway bedding construction.

• 한국건축시공학회지
• /
• 제5권4호
• /
• pp.139-144
• /
• 2005

A ground anchor system is used as a load carrying element in soil work. The conventional systems with ground anthers bring about the anchorage loss of wedges when anchors are installed for the support of soil structures. Hence we developed the new type of anchor system using both the spacing apparatus and spring (length 60mm, diameter 6mm). In this system, we tan directly check the condition of wedges and PS strands and modify the problems with the slip and anchorage of wedges under construction. For demonstrating the superiority of this system, we carried out a series of the laboratory test. Consequently, we can obtain satisfactory result (18.99$\%$ reduction to the loss of conventional systems). Moreover, the replacement of wedges is easy and simple when retensioning of strands.

• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 2006년도 춘계 학술발표회 논문집
• /
• pp.257-267
• /
• 2006

The earth retaining wall systems for excavation works in a populated urban area or a poor soil deposit can be limited due to various restriction. Thus there are various methods to be applied for them such as the soldier pile method, the diaphragm wall with counterfort and so on. In this study, the self-supported earth retaining wall using the DCM(Deep Cement Mixing) method, including its merits, demerits and some important characteristics occured in the design and the construction stage, was introduced. It might be reference for the other design and construction procedures using the DCM method.