• 한국방재학회:학술대회논문집
• /
• 한국방재학회 2008년도 정기총회 및 학술발표대회
• /
• pp.165-168
• /
• 2008

최근 지하공간에서의 인적재난으로 인한 피해가 증가하고 있지만, 아직 국내에서는 지하공간 안전관리에 대한 규정 및 법규가 미약한 실정이다. 따라서 본 논문에서는 지하다중이용시설의 안전관리 체계 구축방안을 제시한다. 이를 위해 사고 발생 시 많은 피해가 예상되는 지하도 상가를 대상으로 현행 법률의 문제점을 분석하고, 지하상가 소방시설에 대한 안전관리 체계를 설명한다. 이는 구축단계, 시설물, 안전설비와 그에 따른 항목을 트리구조로 구성해 지하공간의 특성을 고려할 수 있게 한 체계이다. 이 안전관리 체계가 완성됨으로써 흩어져 있는 지하공간에 대한 안전관리체계를 재정비 할 수 있을 것이다.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2012년도 추계 학술논문 발표대회
• /
• pp.189-192
• /
• 2012

Underground structure construction in the downtown is very difficult despite the development of construction technology. We have been a lot of research in order to solve the problem, it was a remarkable achievement. But there are still many difficulties. This study is to analyze the construction technology to demolish the existing underground structures and to build new building applied topdown method at the same time. This technology was effective to suppress interference between the exsisting structure and new building. Therefore, this technology is expected to be able to be used in similar cases in the future.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2013년도 추계 학술논문 발표대회
• /
• pp.4-7
• /
• 2013

In recent downtown high land due to an increase in the utilization of land from the property line to maximize the proximity of the construction and use of underground structures has increased. The nature of urban underground retaining structure construction safety, environmental management, and civil contrast situations, construction periodt perspective, this method is widely used in the backhand. Recent Patents DP method and the method of the DBS method than in the SPS process is deleted according to the PRD process cost savings are generated. The workability and safety study of two kinds of method, such as air speed, and considering the reduction of indirect costs in terms of economic efficiency is considered to be a superior method.

• 한국건축시공학회지
• /
• 제4권3호
• /
• pp.109-116
• /
• 2004

Normally easy task of plat in urban architecture is that using underground full of activities for increase building site efficiency. Especially for using underground space for the parking lot. Also utilize underground is more increase for fulfill requirement in modern society considered with environmental friendly architecture. The primary objective of this study is to apply analyzed formal foundation type for selecting the optimum type of parking lots considered with structural stability, economical efficiency, construction efficiency, construction duration. This study aim to on criteria decided through the questionaries for the selection considered with in the scale of second stories parking lots underground, parking volume is 80 and reinforced concrete structure. The bearing capacity is 6～8m and downward from surface, healthy ground bearing capacity is 40 t/m2. This study comparative analysis and discuss economical efficiency, construction efficiency, construction duration based constructivist stability which applied Single foundation, Mat foundation, Drop Mat foundation. The result of this study is as follows: First, the result of economical efficiency is that on the basis of single foundation, Drop Mat foundation is 1.88, Mat foundation 2.04 as a comparative analysis on the basis of total construction cost included material cost, labor coast and machinery cost. Second, the result of construction efficiency order is single foundation, Drop Mat foundation, Mat foundation as a comparative analysis on the based connected characteristics. Third, the result of construction duration is that on the basis of Mat Foundation, Drop Mat foundation is 1.33, single foundation is 1.87 as a comparative analysis Critical Path. Forth, Each foundational type characteristics order through the matrix method is that overall each formal type of foundation contraries at economical efficiency and construction efficiency, construction duration. Also expect contradiction between engineers and owners due to engineer pursuit construction duration and ewer to begin with economical efficiency. Fifth, The selection of suitable foundation formal type needs that based consider project characteristic and field condition as according to above result of a comparative analysis. As a result, a comparative analysis economical efficiency, construction efficiency, construction duration of Mat foundation, Drop Mat foundation, single foundation with 3Bay reinforced structure underground parking lots on the healthy ground.

• 한국건축시공학회지
• /
• 제6권4호
• /
• pp.45-52
• /
• 2006

Top Down method is more widely used in downtown construction, recently. As underground construction constitutes a significant portion of the total construction cost and time in Top Down construction, it is important to develop a construction method to reduce the time required in underground works. The purpose of this study is to analyze load carrying capacity of Top Down prefounded columns on different excavation schedule. When several floors are excavated, the valid buckling length of prefounded column is increased and allowable buckling stress is decreased. The result shows that all columns are safe in buckling down to B3 story whether 2 or 3 stories are excavated. However, several columns are not safe from B4 story when 2 or 3 stories are excavated straightly. With these results, a process can be designed that the first three stories in the basement are excavated, and then excavate B4 story after placing concrete on B1 and B2 floor.

• 한국터널지하공간학회 논문집
• /
• 제17권6호
• /
• pp.675-683
• /
• 2015

주방식 지하구조물은 주방식 채광법의 개념을 이용한 지하구조물 건설 방법이다. 주방식 공법에서 배수는 터널의 싱글쉘 개념과 유사하며, 주방식 지하구조의 장기적인 안정화를 위해서 복공 뒷면의 지하수를 배수하여 지하수위를 사전 저감시키는 방식이 유효하다. 그러나 배수공에 의한 지하수위 저감 방식은 지하 굴착시 굴착면에 지하수압이 작용하지 않거나 발생 용수량이 크지 않다면 배수공은 필요치 않게 된다. 본 연구에서는 지하 굴착시 발생용수량에 따른 배수공 적용 유무를 검토하여 주방식 지하구조에서 배수공 적용 유무를 판단하는 기준을 제안하고자 하며, 배수공 적용이 불필요한 구간에 대해서는 숏크리트를 통한 유도 배수시스템을 제안하고자 한다.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2009년도 제40회 하계학술대회
• /
• pp.383_384
• /
• 2009

After the 1970s, the importance of underground transmission systems increased and the construction rate of underground transmission lines also showed increasing trends each year, especially in metropolitan areas. Accordingly the social ripple effects are very large and wide when the fault occurs in underground power system, and the amount of time and money spent to restore the system also increases. So we must ensure stable operation and long-term reliability of the facilities. In Korea's case, long-term reliability tests for EHV power cables and accessories progressed poorly because equipment was not compatible for long-term reliability tests. Therefore we planned to construct a long-term reliability test field for EHV underground cables in order to ensure international quality reliability and optimal power cable operation techniques. The Gochang Underground Cable Test Field is under construction, funded by the Korean government, the govenment's union investment department, KEPCO, KERI and three private cable corporations. This project began in March, 2005 and will be completed by February, 2010. It is designed to promote joint research by incorporating several types of test equipment, construction of operating facilities, and being an internationally certified authority.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2007년도 춘계학술논문 발표대회
• /
• pp.101-104
• /
• 2007

As the proportion of underground construction increases, the impact of inappropriate selection of a underground construction method for a construction size increases. The purpose of this study is to develop an objective way of selecting an excavation method. There have been several attempts to achieve the same goal using various data mining methods such as the artificial neural network, the support vector machine, and the case-based reasoning. However, they focused only on the selection of a retaining wall construction method out of six types of retaining walls. When we categorized an underground construction work into four groups and added more number of independent variables (i.e., more number of construction methods), the predictability decreased. As an alternative, we developed a decision tree by analyzing 25 earthwork cases with detailed information. We implemented the developed decision tree as a computer-supported program called Dr. underground and are still in the process of validating and revising the decision tree. This study is still in a preliminary stage and will be improved by collecting and analyzing more cases.

• 한국지리정보학회지
• /
• 제24권4호
• /
• pp.1-25
• /
• 2021

정부는 지하안전사고 대응 및 예방을 위해 현행 수작업 기반의 지하공간통합지도 구축 및 갱신체계를 지하구조물을 포함한 지하정보에 대해서 자동화 기반의 3D 지하정보 구축 및 갱신체계로의 전환을 위한 준공도서제출 시스템 구축사업을 진행하고 있다. 하지만 3D 지하구조물 자동화 갱신 시 필요한 표준도면 연구가 미비하여 이에 관한 구체적인 연구가 필요한 실정이다. 본 논문에서는 지하공간통합지도를 구성하는 6종 지하구조물을 대상으로 표준도 기반의 3차원 지하구조물 구축 방안을 제시하여 신속 정확한 도면데이터 작성과 체계적인 3차원 지하구조물 도면데이터 관리가 이루어질 수 있도록 하였다. 또한, 지하정보 실무에 활용 가능한 3D 구축용 가공도면 툴을 개발하여, 일반 CAD 프로그램 사용자들도 쉽게 가공도면을 제작할 수 있도록 하였다. 본 논문에서 도출된 결과물들은 향후 3D 지하구조물 구축을 위한 표준 프레임워크 및 실무적용 지침 수립 시 주요한 참조자료가 될 것으로 기대한다.

• Smart Structures and Systems
• /
• 제30권5호
• /
• pp.433-446
• /
• 2022

Despite efforts to reduce unexpected accidents at confined construction sites, choking accidents continue to occur. Because of the poorly ventilated atmosphere, particularly in long, confined underground spaces, workers are subject to dangerous working conditions despite the use of artificial ventilation. Moreover, the traditional monitoring methods of using portable gas detectors place safety inspectors in direct contact with hazardous conditions. In this study, a long-range (LoRa)-based wireless safety monitoring system that features the network organization, fault-tolerant, power management, and a graphical user interface (GUI) was developed for underground construction sites. The LoRa wireless data communication system was adopted to detect hazardous gases and oxygen deficiency within a confined underground space with adjustable communication range and low power consumption. Fault tolerance based on the mapping information of the entire wireless sensor network was particularly implemented to ensure the reliable operation of the monitoring system. Moreover, a sleep mode was implemented for the efficient power management. The GUI was also developed to control the entire safety-monitoring system and to manage the measured data. The developed safety-monitoring system was validated in an indoor testing and at two full-scale water pipeline construction sites.