• Journal of the Korean GEO-environmental Society
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• v.12 no.2
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• pp.35-43
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• 2011

Confined aquifer, which is separated with upper clayey or silty materials, is partially distributed at the depths of the sediments in Ddan-sum area on the lower Nakdong river. Measurements of groundwater levels at 13 sites explain that groundwater flow shows seasonally various due to seasonal rainfall and agricultural water use. From 9 long-term monitoring data of groundwater levels at 7 sites, 3 types of groundwater levels time series can be classified using principal component analysis. The first type is seen in the center of Ddan-sum and has a round-shape graph due to a weak response to stream water levels. The second type exists in the outer part of Ddan-sum and shows sharply peak-shape graph due to a rapid and strong response to stream water levels and rainfall. The last type, which is seen in a deep layer, has a periodicity by tital effect. From geochemical analysis at each monitoring sites, [$Ca-HCO_3$] type happens in the center of Ddan-sum far from Nakdong river, and [$Na-HCO_3$] and [$Ca-SO_4(Cl)$] types exist in the outer of Ddan-sum affected by river quality.

• Korean Journal of Construction Engineering and Management
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• v.23 no.5
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• pp.3-14
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• 2022

Construction projects have high potentials of claims among a variety of stakeholders. Claims on their own are not disputes but they have high potentials leading to disputes if agreements are not made between parties due to conflicting opinions. In the event of the construction disputes between clients and contractors, it could give negative impacts to both parties and, to minimize or pro-actively manage construction disputes, the role of clients is more significant. The objective of the study is to analyze a level of associations between the types of disputes and causes of construction projects based on the association rule analysis, and to identify and discuss key characteristics and implications from client's perspectives. The study analyzes associations between the types of disputes and causes, and also identifies those with a high level of associations. It also presents the outcomes of more systematic analysis compared to descriptive statistics just based on frequencies. Through the analysis of the data cases, the study proposes the directions to resolve the causes of disputes from client's perspectives. It can assist to improve understandings of the relationships between the types of disputes and causes and to pro-actively manage the disputes of construction projects.

• 월간 기계설비
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• s.264
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• pp.70-71
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• 2012

건설산업기본법이 지난 6월 1일 개정되어 시행에 들어갔다. 이 중 대한설비건설협회가 하도급자의 권리 보호와 공생발전을 위해 그동안 국토해양부에 관련제도 개선을 지속적으로 건의한 결과 하도급자 보호를 위한 부당특약 유형 확대 등이 개정되었다. 하도급자 보호조치 강화로는 부당특약 유형 확대, 하도급공사 준공 기성 검사결과 통지 의무화, 선급금 지급기한 신설, 도급계약서 미교부시 과태료 부과 등이 개정되었고 부실 부적격 업체에 대한 제재 강화로는 건설업 등록의 결격사유 강화, 건설업 등록말소 기준 강화 등이 개정되었다. 또 건설업 신고대상 추가, 과징금 상향조정, 과태료 대상 등도 개정되었다.

• Journal of the Korean Institute of Landscape Architecture
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• v.40 no.1
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• pp.81-91
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• 2012

The purpose of this study was to analyze judicial precedents related on landscape construction defects(JPLCD) and suggested the improvement plan for dealing with it. The results are as the following: 1. Landscape construction defects litigations have been increased so far since 2000 and the duration of original trial was approximately 603 days, while appeal trials took up to 550 days. Therefore, the analysis revealed that settlement of disputes were lengthy and wasteful to consumers and constructors. 2. Judgement's cost accepted by the judge was only 53.6% of appraisal's cost appraised by appraiser, therefore it revealed appraiser overestimated the repair cost of landscape construction defects. 3. According to work classification categorized by Landscape Construction Standard Specification(2008) of the Korean Institute of Landscape Architecture, landscape planting amounted to 75% of JPLCD and plaintiff(consumers)'s prevailing rate of it reached 77% to be a serious burden to constructors. 4. According to JPLCD categorized by the type of dispute, defects caused by consumer's negligence for maintenance amounted to 29% and defendant(constructors)'s prevailing rate of it reached 64% to be the main responsibility of consumers. Further study will be required to make the judge standard of landscape construction defects through legal and technical research.

• Journal of the Korea Institute of Building Construction
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• v.23 no.4
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• pp.417-428
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• 2023

The demolition of domestic infrastructures mirrors other significant construction initiatives in presenting a markedly high accident rate. A comprehensive investigation into the origins of such accidents is crucial for the prevention of future incidents. Upon detailed inspection, the causes of demolition construction accidents are multifarious, encompassing unsafe worker behavior, hazardous conditions, psychological and physical states, and site management deficiencies. While statistics relating to demolition construction accidents are consistently collated and reported, there exists an exigent need for a more foundational cause categorization system based on accident type. Drawing from Heinrich's Domino Theory, this study classifies the origins of accidents(unsafe behavior, unsafe conditions) and human errors(human factors) as per the type of accidents experienced during demolition construction. In this study, a three-step model of QFD-FMEA(Quality Function Deployment - Failure Mode Effect Analysis) is employed to systematically categorize accident causes according to the types of accidents that occur during demolition construction. The QFD-FMEA method offers a technique for cause classification at each stage of the demolition process, including direct causes(unsafe behavior, unsafe environment), and human errors(human factors) through a tri-stage process. The results of this accident cause classification can serve as safety knowledge and reference checklists for accident prevention efforts.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2008.11a
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• pp.509-512
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• 2008

Clients demands have been changed by construction circumstances such as high-technology, mega-projects, and the complexity of construction. Advanced foreign countries have already introduced and applied new project delivery systems(i.e, CM, DB, etc.) to deal with the change of such that. Recently, Korea also launched two new project delivery systems, "Best Value Contracts to which the State is a Party" to provoke the project delivery system, which helps a public owner select a project delivery system appropriate to the project characteristics. Even though government has made his efforts as stated above, some clients have still used those to public construction projects uniformly. That is because there are not a selection criteria of project delivery system for clients. Therefore, this paper proposes the selection criteria of project delivery system based on project types in the public large construction projects.

• Korean Journal of Construction Engineering and Management
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• v.17 no.5
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• pp.89-96
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• 2016

Most data generated in construction projects is unstructured text data. Unstructured data analysis is very needed in order for effective analysis on large amounts of text-based documents, such as contracts, specifications, and RFI. This study analysed previously performed project's bid related documents (bidder inquiry) in overseas construction projects; as a results of the analysis frequent words in documents, association rules among the words, and various document topics were derived. This study suggests effective text analysis approach for massive documents with short time using text mining technique, and this approach is expected to extend the unstructured text data analysis in construction industry.

• Journal of the Korea Institute of Building Construction
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• v.10 no.6
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• pp.7-17
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• 2010

Modern construction technology has been highly systemized, which has simplified the construction methods applied to construction sites. However, on reinforced concrete construction sites, there have recently been many new disasters, and these have been bigger than before due to the heavy dependency on manpower. This study investigates the cause and cases of disasters during reinforced concrete construction. In addition, the study surveyed the psychological condition of construction site personnel in relation to the safety awareness and the causes of disasters, while deriving the basic components related to disasters on construction sites in order to analyze the relationship between each component to suggest an efficient safety management measures checklist. Construction site personnel should utilize the results drawn from this study as a disaster prevention tool to use in a safety education class, and not consider this simply as statistical data, but as a checklist to ensure full awareness of the appropriate priorities for safety categories to utilize in the reinforced concrete construction in order to execute reasonable safety management.

• Journal of the Korea Institute of Building Construction
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• v.23 no.5
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• pp.583-593
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• 2023

For a holistic and precise assessment of safety benchmarks within a construction venture, it's paramount to delineate between the intrinsic features of the construction and its real-time, on-site performance metrics. In this study, we delved into genuine accident instances to discern the interplay between these construction attributes and on-ground performance determinants in relation to safety mishaps, employing the binomial logit analytical framework. Our scrutiny underscored that construction expenditure profoundly modulates the likelihood of fatal occurrences. Notably, variables pertinent to on-site safety protocols wielded considerable influence over both fatal mishaps and accidents implicating multiple personnel. These revelations intimate that while ascertaining the safety quotient of a construction initiative, a mere classification and recalibration based on fiscal dimensions can elucidate much. Yet, a comprehensive safety appraisal necessitates transcending quantitative indices, such as frequency of mishaps or casualty rates, to encapsulate the multifaceted interventions and strategies adopted at the construction locale.

• Proceedings of the Korea Water Resources Association Conference
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• 2019.05a
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• pp.383-383
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• 2019

우리나라는 전국에 약 17,500여개의 크고 작은 농업용저수지가 있으며, 이 중 약 89%는 설치된 지 40년이 지나 노후화가 이뤄지고 있다. 최근에는 기후변화 영향으로 홍수피해가 대형화되고 있어 농촌지역의 홍수재해 발생시 저수지 하류부의 인명피해 및 농경지 침수피해는 증가될 것으로 예상된다. 한국농어촌공사는 농업용저수지의 효율적인 물관리 및 재해방지를 위해 자동수위계측기를 활용한 실시간 저수위 자료를 구축하고 있다. 기후변화에 따른 홍수피해를 신속하게 대응하기 위해서는 과거 홍수사상에 대한 저수지 모델링을 수행하고 그 결과를 농촌지역 풍수해 방지를 위한 의사결정 자료로 활용하게 된다. 기상예측정보의 활용에 앞서 농업용저수지의 홍수모의가 과거 수문사상을 현실적으로 재현하는지를 검토할 필요가 있어 본 연구에서는 저수지 홍수분석의 검정자료인 저수위 자료에 대한 활용성 평가를 수행하였다. 대상저수지는 ${{\circ}{\circ}}$농촌용수구역 내 위치한 ${{\circ}{\circ}}$저수지로 하고, 10분 단위의 저수위 자료를 활용하였다. 연도별 원시자료에 대한 결측, 불량자료, 이상치 등을 검토하고, 그 결과에 대한 유형분석을 수행하였다. 본 연구결과는 과거 홍수사상에 대한 농업용저수지 홍수모의 분석 및 검정을 통해 강우레이더 등 기상예측정보 기반의 농촌지역 홍수피해 산정결과의 신뢰도를 향상시킬 수 있을 것으로 기대한다.