• Proceedings of the KIEE Conference
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• 1996.07a
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• pp.235-237
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• 1996

This paper shows a reasonable power demand method and load characteristics in underground streets, that was made by the systematic and statistical way considering actual conditions, such as investigated electric equipment capacity, electric power consumption, load characteristics, etc for 13 underground streets.

• Proceedings of the Korean Geotechical Society Conference
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• 2009.09a
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• pp.728-735
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• 2009

2009년 7월 초순 집중호우로 인하여 남부지방에 많은 산사태가 발생하였다. 사면 붕괴의 직접적인 원인은 집중강우에 의한 것이나, 붕괴 원인 파악과 붕괴 현황에 대하여 조사하고 자료를 분석하였다. 본 연구는 소방방재청의 요청에 따라 현지조사를 실시하고 수집된 자료에 기인한 것이다.

• Journal of Korean Tunnelling and Underground Space Association
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• v.17 no.6
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• pp.605-614
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• 2015

A room-and-pillar underground structure is characterized by its grid-type array of room and pillar. As a result, its construction and economical efficiency can be governed by excavation sequence. In this study, the construction period by the drill and blast method which can be treated as a main sequence for excavation was examined by considering the regulation for blasting and construction standard of estimation in Korea. To evaluate the construction period for the room-and-pillar underground structure constructed in 4 kinds of square-type area ($30{\times}30{\sim}57{\times}57m$), the concurrent excavation pattern which was suggested in the previous researches was used. From the suggested condition, the total construction period by drill-and-blast method can be estimated with the consideration of the construction area, number of jumbo drill and faces in operation.

• Proceedings of the KIEE Conference
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• 2004.05b
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• pp.183-185
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• 2004

Despite high cost, the underground power distribution system has been preferred by utilities and customers due to its stability and good living environment. Utilities, however, are burdened with the cost of installation as the service region of underground power system is getting enlarged. In this paper, a design method is proposed in order to reduce the construction cost of underground distribution system. That is an optimum algorithm, which can increase the total number of pipes in a limited space compared with a conventional design method. As a result, the proposed design method can reduce efficiently the construction cost of underground distribution system.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2001.11a
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• pp.99-117
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• 2001

In the past, The selection of individual method of construction was done by head of construction site or an experienced person very frequently. By doing this, The wrong selection of construction method without exact adjudication of construction site situation lead to increasing of cost and extension of construction term. Finally it will effect all over the construction process. Especially, In case of Underground construction in the beginning, there are a lot of a variable factor and it also effect on the entire construction process and it need rely careful process. The purpose of this study is to present the best suitable methodology fer selection of construction method by considering potential risk of construction method and variables together with external condition for Underground construction. The purpose of this study is to select the most suitable construction method by analysing potential conditions(Construction site situation and Client. Request in designing) To do this, We prepared arrangement rule to arrangement conditions for construction method. And then make Checklist the analyzing construction method. Though above process, To expect the risk of individual construction method using above risk checklist and using Analytic Hierarchy Process among Multiple-Criteria Decision Making, the professional opinions is to be adapted. By doing this, It can lead and select the most suitable considering method considering the data which get from risk density test.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.11a
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• pp.215-216
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• 2023

Leakage in the structure due to the irregular flow of groundwater in the underground structure penetrates into internal spaces such as underground parking lots and basement through underground walls, which is expensive in terms of maintenance of the building. In this study, various composite waterproofing methods installed on the outer walls of underground structures were selected to evaluate the structural performance of composite specimens due to bending behavior through experiments and analysis on bending test behavior on concrete attachment surfaces.

• Journal of the Korea Institute of Building Construction
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• v.5 no.4 s.18
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• pp.165-171
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• 2005

Nowadays, a source of all water, which has been spent by a lot of people, is the rainwater The rainwater is directly relating human being' life. According to how to use rainwater. human being' life is abundant or poor. Due to the lack of underground filtration quantity, the water circulation of the city is discontinued and the underground ecosystem is destroyed. This study suggest that the unused underground space of building and temporary structure can be used into rainwater storage tank in the facility to use rainwater. Moreover, in this study, while the building is constructed, It is showed that the water used in construction can be replaced in the rainwater.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2017.05a
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• pp.129-130
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• 2017

By comparing the survey and the actual situation at hand, the results showed that the lowest floor slab, wall construction joints, and floor expansion joints were the most prone to leakage. A waterproofing design method in underground parts of apartments is proposed to prevent leakage in underground of apartments. Further research is required for the establishment of this detailed design and construction guideline in regards to this study.

• Explosives and Blasting
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• v.19 no.1
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• pp.11-18
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• 2001

This is a case history on design and cnostruction of tunnel for under passing an underground transformer substation. The original construction plan was cut & cover method to avoid blasting vibrations and displacements of facilities during the construction stages. But this plan was changed to tunnel because of the difficulties from construction period, cost and the required relocation site. As a results of tunnel construction, the relocation of transformer substation and replacements of transmission cables were not necessary. Therefore about 10 months of construction period and 3.5 billion wonts of construction cost were saved. Additionally, quantitative criterion for blasting was provided through the results of blasting vibration analysis.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2006.11a
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• pp.9-12
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• 2006

In recent years, construction site has developed lots of new methods and materials for Time-Cost Trade-off and improving constructability. In the case of underground construction, especially, there are many restrictions and difficulties. Shortening of the construction time in construction of underground, we use top-down method in undergroud wall. A open slab has been designed for the purpose of overcoming a weak point of former top-down method. This study based on open slab on the under ground top-down method, to more improve constructability, to introduce the effect and the performance of top-down method.