• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2018년도 추계 학술논문 발표대회
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• pp.83-84
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• 2018

As the concentration of greenhouse gases in the atmosphere increases, the reduction of CO2 is gaining worldwide attention. In the construction industry, cement replacement materials such as fly ash and blast furnace slag were investigated to reduce CO2 emissions in cement production process. Precast concrete is used in the field after manufacturing in the factory in the form of pipes and bricks because of shortening construction period and cutting construction cost. According to the results of previous research, it is known that early CO2 curing in concrete using OPC or fly ash has an initial strength enhancement effect and can be used for precast concrete production. Therefore, the purpose of this study is to evaluate the strength improvement effect by confirming the initial strength improvement effect when blast furnace slag is mixed.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.551-562
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• 2022

The building production system has been analysed by the dichotomy "employer-contractor" relationship, which failed to take into account of the role and function of multiple stakeholders within the life-cycle supply chain. This is further observed in the current conflict resolution model, which, in my argument, struggles to contribute to industrialize the building production and achieve better efficiency and effectiveness as expected. The purpose of this paper is to critically assess the issues of current programme-based conflict resolution model, and discuss alternative models how they can be modelled and applied to the construction projects. The conclusions of findings are; First, the current model is framed around the contracts and dispute resolutions based on the legal concept of "claimant and respondent" where one party(s) advances a claim once and the other(s) objects, as such it fails to reflect the nature of construction projects where multiple stakeholders are involved concurrently and for a long period of life-cycle of buildings. Second, an alternative is "Six-stakeholders model" which represents the multiple stakeholders and clarifies the flow of obligation-liability-monetary relationships among participants for a long period of life-cycle of buildings. Further, with reference to both historical and recent cases, a reflection and insight into pros and cons of programming method is added, especially as to why this method is considered to have become a mandate of the modern construction management, and how academics and practitioners should deal with it more cautiously and prudently.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2007년도 춘계학술논문 발표대회
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• pp.19-23
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• 2007

In this paper, the period for the strength correction was determined with each region of south Korea based on the meteorological data of KMA(Korea meteorological administration) by applying KASS-5 regulation. In case of 28 days of strength control age, the period for strength correction with 6MPa was calculated to 50-60 days and, with 3 MPa. to around 80 days. The period for the strength correction was shown to be decreased with the rise of altitude. The period to consider the delay of the strength development due to low temperature including the period of cold weather concrete was nearly 7 months around 1 year. References for determining the strength correction factors with each region of south Korea was provided in this paper.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2002년도 가을 학술발표회 논문집
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• pp.319-326
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• 2002

During the construction period of submarine shield tunnel, which is built firstly in very soft marine clay layer 40m deep in Korea, wide range problems were encountered such as safe launching against high earth pressure at shield entrance, technique of shield face pressure control when passing through complex multi-layered soils This paper introduces successful construction practice through development of state-of-the-art construction method and field monitoring.

• 건축역사연구
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• 제31권1호
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• pp.19-28
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• 2022

The construction period of the ondol (Korean floor heating system) at Hoeamsa Temple Site is known as Joseon. The main reason is that a large number of remains in the Joseon era were excavated from the ondol floor with an all-around ondol method. This article partially accepts the theory of the creation of Ondol at Hoeamsa Temple Site during the Joseon Dynasty and suggests a new argument that some Ondol remains were built during the Goryeo Dynasty. The grounds for them are as follows. First, through the building sites consistent with the arrangement of the Cheonbosan Hoeamsa Sujogi (天寶山檜巖寺修造記, Record of Repair and Construction of Hoeamsa at Cheonbosan Mountain), it is highly likely that the ondol remains as a basic floor was maintained during the reconstruction period in Goryeo. Second, the all-around ondol method of the Monastery Site has already been widely used since the Goryeo Dynasty. Third, some ondol remains consist of "Mingaejari" and "Dunbeonggaejari," which were the methods of the gaejari (which dug deeper and stayed in the smoke) in the pre-Joseon Dynasty. Based on the above evidence, this study argues that the building sites such as Dongbangjangji, Seobangjangji, Ipsilyoji, Sijaeyoji, Susewaryoji, Seogiyoji, Seoseungdangji, Jijangryoji, and Hyanghwaryoji were constructed during the late Goryeo Dynasty.

• 한국방재안전학회논문집
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• 제7권2호
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• pp.9-16
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• 2014

공용 중인 터널 구조물의 구조적 취약부위를 대상으로 시행되는 유지관리 계측은 효과적인 관리를 위해서 터널의 굴착에 따른 지반 및 주변 구조물의 거동을 파악하기 위한 공사 중 계측과 연계하여 판단되어져야 하나 공사시기 및 유지관리 시점을 기준으로 공사 중 계측과 유지관리 계측을 별도로 시행하고 있어 연계성 및 관련 자료의 체계적 관리가 대부분 미흡한 상태이다. 본 논문에서 국내 설계기준의 터널계측 문제점을 분석하여 개선방향을 제시하였으며, 향후 유지관리에는 첨단센서 및 무선통신 기술의 활용이 활발히 추진될 것으로 전망되므로 이와 관련된 유지관리 계측시스템의 개발 적용 및 국내 설계기준 및 시방기준의 개정이 필요하다.

• 한국건설관리학회논문집
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• 제7권1호
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• pp.148-158
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• 2006

공공발주기관의 동절기 공사불능기간의 운영은 공사기간을 길게 하고, 건설사업비를 증가시킨다 또한, 건설인력의 활용을 어렵게 하여 근로소득을 감소시킴으로써 국가 경제에도 나쁜 영향을 미친다. 그러므로 동절기에도 골조공사는 시행되어야 할 것이다. 그러나 동절기에 골조공사만 시행하고 마감공사를 시행하지 않을 경우, 골조공사의 빠른 진척이 마감공사의 주공정선에 영향을 미치게 됨으로 이에 대한 규명이 필요하다. 본 연구에서는 동절기 골조공사 시행이 마감공사의 주공정선의 작업기간에 미치는 영향을 규명하였다. 이를 위해 가상현장을 설정한 후, 이 현장을 대상으로 마감공사의 공정표와 주공정선, 전체 공정표 및 주공정선을 작성하고, 공정시뮬레이션을 실시하였다. 본 연구결과는 동절기 골조공사 시행 시 아파트 공사의 공기산정에 유용하게 활용될 수 있을 것이다.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2006년도 정기학술발표대회 논문집
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• pp.408-413
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• 2006

최근 국내업체의 해외진출 동향은 지나치게 플랜트에 편중된 형태를 띠고 있다. 이는 수주품목의 다양성에 대한 문제를 야기함과 동시에 해외건설시장의 일부분에 국한된 분야에 너무 많은 비중을 두고 있다는 문제점을 지닌다. 이에 지난 1990년대 후반에 있었던 외환위기를 기준으로 외환위기 이전기(1990년$^{\sim}$1996년), 외환위기 침체기(1997년$^{\sim}$2000년), 외환위기 이후기(2001년$^{\sim}$2006년 7월)로 나누어 토목 ${\cdot}$ 건축분야의 해외건설 및 용역 수주현황을 살펴보고 세계 각 지역별로 주요 국가들을 선정, 토목 ${\cdot}$ 건축분야별로 대표적인 세부공종을 선택하여 그 변화추이를 분석하였다. 이을 통해 국내 해외건설사업 경쟁력 요소를 살펴보고 토목 ${\cdot}$ 건축분야의 시장확대 전략을 제시하고자 한다.

• 한국건축시공학회지
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• 제13권2호
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• pp.102-111
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• 2013

During the administration of a construction project, various types of participants are engaged in the project. From the design phase to the maintenance phase, these participants may confront many risks. To avoid these risks, participants should utilize an insurance company or a bond company. The types of risks and liability that a construction manager may face are listed in the construction law or contract. But there are some arguments related to risk transferring and the content of risks. For this reason, construction managers must carefully consider any possible risks in the contract and the construction law. Therefore, for construction managers to deal with risks appropriately, the introduction of a legal requirement to carry professional liability insurance, a defined compensation range for damages, a method of guarantee in the event of defects, a defined compensation claim period for damage, and a method of damage claim were suggested in this study.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2019년도 추계 학술논문 발표대회
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• pp.108-109
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• 2019

Top-down construction is a useful method of utilizing the working space, economic benefits and shorten the construction period. Precision construction of the elevator core is very important for safety of the top-down structure. In this study, the layout system for the field-BIM(Building Information Modeling) was used to precisely construct the elevator core in the basement and the ground. Through the layout system, it was possible to process the construction status, review the design results and construction errors, and confirm whether there is or not within the construction error range for elevator installation.