• Journal of the Korea Institute of Building Construction
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• v.17 no.6
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• pp.587-594
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• 2017

The construction industry generates the greatest number of disasters. Laborer injury at construction sites is mostly reported by small and mid-sized construction sites. Moreover, of the injuries, the greatest number is related to formwork. The objective of this study is to propose a checklist of the risk factors of formwork, in which industrial injuries occur most frequently in small and mid-sized construction sites, with which safety management can be done thoroughly. Risk factors and preventive measures are derived by analyzing 9,396 industrial disasters occurring at construction sites in Korea. The checklist drawn in this study was reviewed by five specialists in safety management, and applied to construction sites to verify its applicability. In a result, applying the checklist to the site showed that the safety management system of small and medium-sized construction sites were insufficient. It is expected to contribute to the effective safety management of small and mid-sized construction sites.

• Journal of the Korean Recycled Construction Resources Institute
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• v.5 no.4
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• pp.427-434
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• 2017

The generation of construction waste can be divided into a decommissioning phase and a new construction phase, and most of the waste is generated at the decommissioning stage. However, recently, domestic new construction construction has expanded to 150 trillion yards per year, so construction work is increasing rapidly. Especially, as the size of the construction work with much waste of construction waste exceeds 100 trillion, the management of the amount of construction waste in the new construction site is required. Unlike the dismantling work site, the new construction site can separate waste generated by each property, and relatively low foreign matter content is generated. The purpose of this study was to investigate the amount of construction waste generated by new construction sites and to calculate the unit amount of construction waste based on this. In addition, since the existing unit cost is centered on concrete and mixed waste, we set the basic unit by setting synthetic resin, waste wood, and waste board as additional items. The basic unit survey was carried out to investigate the wastes according to the characteristics of each construction period. As a result of the survey, the new construction site showed that most wastes were discharged in the first 30% and after 70% of the process, and the ratio of mixed construction waste was as high as 45%. As a result of this study, it was found that about twice as much waste was produced as compared with the conventional standard product.

• The Safety technology
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• no.192
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• pp.16-18
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• 2013

국제관광도시로서의 명상을 돈독히 다지고 있는 제주도. 최근 이곳의 관광업 관계자들은 물론 지역주민들은 한껏 기대감에 부풀어 올로 있다. 바로 롯데건설(주)이 시공하는 제주시티호텔이 다음 달이면 준공될 예정이기 때문이다. 실제로 이곳은 제주도 내에서 가장 높은 건축물(90m)로 탄생하면서 랜드마크 역할을 톡톡히 할 것으로 전망되고 있다. 이곳 현장은 지난 2011년 8월 구 제주일보 사옥 철거공사를 시작으로 2011년 12월부터 TOP DOWN 및 UP-UP공법을 병행하여 토공, 골조공사를 본격적으로 착수했다. 현재는 공정율 85% 수준으로 건물외부 코깅작업 및 내부 인테리어 마감작업이 진행 중이다. 이곳이 특히 주목받고 있는 이유는 롯데건설(주)의 안전관리 기술력이 집약된 또 하나의 건축물이라는 평가를 듣고 있기 때문이다. 롯데건설(주) 관계자들은 이곳에 면세점과 호텔 등 다중이용시설이 들어서기 때문에 부실시공은 곧 대형안전사고를 불러온다는 인식을 바탕으로 빈틈없는 안전시공을 해나가고 있는 것이다. 이는 물론 현장 근로자들을 대하는 안전관리에도 고스란히 나타난다. 착공부터 현재까지 무재해 100만 시간을 앞두고 있다는 점이 이를 잘 증명한다. 안전으로 제주도의 새로운 명소를 건서래 나가고 있는 롯데건설(주) 제주시티호텔 신축현장을 찾아가 봤다.

• Environmental engineer
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• v.25 s.261
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• pp.26-30
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• 2008

최근, 뉴스 등에서 타워크레인 붕괴사고로 인한 사망사고를 심심치 않게 듣게 되는데 타워크레인은 건축공사 현장에서는 없어서는 안 될 필수 설비임에 틀림없다. 타워크레인을 많이 설치하고 또 많이 사용하는 만큼 안전이 무엇보디도 중요하다고 할 수 있는데 이번 호에는 타워크레인이 어떻게 설치되고 또 어떻게 해야 안전한 작업을 할 수 있는지 살펴보기로 하자.

• Journal of the Korea Institute of Building Construction
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• v.23 no.4
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• pp.441-452
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• 2023

Buildings that have been long neglected can suffer severe durability reduction due to factors such as rebar rust and concrete quality deterioration resulting from exposure to outside air. Furthermore, the issues associated with these suspended buildings, including safety accidents, social crimes, and environmental pollution, are becoming increasingly serious. This study investigates the current status of these buildings in the Jeju area, identifies the problems, and examines the durability of the structure in a specific location to assess the possibility of future use. Aesthetic surveys(visual and slope inspections) as well as non-destructive tests(compressive strength tests, neutralization tests, and rebar detection tests) were conducted to assess durability. The analysis revealed that the structure maintained satisfactory durability and the building's condition was good in comparison to the years of neglect.

• Journal of the Korea Institute of Building Construction
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• v.11 no.1
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• pp.9-17
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• 2011

Project delay is one of the most crucial impact factors in the construction process from a schedule and cost management perspective. This study focused on analyzing the causes of concrete frame work delay in the apartment construction project. According to the analysis of project cost composition, the direct cost of concrete works was highest in most samples. Actual delays of concrete works were analyzed for the six different construction components. Causes of delay were grouped into two categories; preconstruction and construction phases and these two groups were further divided into sub-groups. Analysis results revealed that the most significant delay was occurred in the 1st. floor concrete skeleton work. For each delay factor, implications of delay as well as suggestion(s) for reducing the possibility of schedule delay are provided.

• Journal of the Korea Institute of Building Construction
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• v.14 no.5
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• pp.487-495
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• 2014

Shortening the construction duration of structural frame work is extremely important because the work accounts for a major percentage of all cost and duration in large projects. For this reason, new construction methods to reduce the duration of structural frame work are being continuously studied and developed. A PSRC composite column, which uses steel angles instead of H-beams, has the advantages of flexural strength and ductility. Moreover, with this PSRC technique, conventional work for reinforcing bars in columns in practice can be skipped. However, one limitation exists in which the form work is still required. This research proposes a Form-LPSRC column method that is prefabricated with the column frame that includes permanent forms attached. Feasibility was examined with mock-up specimens and finally, the technique applied to real practice. Compared to the conventional SRC column method, this study demonstrated that the proposed technique has many advantages in construction duration, cost, quality, safety and environment.

• Korean Journal of Construction Engineering and Management
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• v.23 no.4
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• pp.78-83
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• 2022

Many domestic construction companies are continuously trying to utilize weather information for construction management. The effect of the weather is greatly reflected in the construction industry because there are many outdoor work. Therefore, weather information is clearly needed to predict the exact construction period. And the calculation of the number of non-working days considering the weather information is very important. However, many construction companies have difficulty calculating the exact construction period because it is difficult to predict the exact long-term weather. In this study, it is analyzed the past long-term weather information. Then the weather information by region and season is applied to the construction management system. Finally, it is confirmed the workable date, the field information and the weather information.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.411-414
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• 2002

As high density of cities, construction project is getting to be high rise, large sized and multi purposed, whereas it has some difficulties due to disordering of classification and undeveloped management systems. In this study, it would be suggested that classification method for knowledge and constraint of temporary facility in order to efficient decision making of temporary facility planning with knowledge reorganization and establishment process.

• Korean Journal of Construction Engineering and Management
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• v.2 no.4 s.8
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• pp.127-134
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• 2001

Effectiveness of Just in time managing system can be obtained by removing unexpected lead-time and maintaining consistency on the physical transportation of construction resource. Construction resource management is essential on checking on load data from production of shop to field, and it is based on building resource life cycle information. In this study, production, transportation, and assembly disciplines of concrete construction should real time communications exchanging information related to shop-field with each other, Establishing information support system is an important initial step for promoting active cooperations among these resource life cycle on data flow. To achieve this, on suitable using management point, we suggest a concrete construction control model.