• Proceedings of the Korean Institute of Building Construction Conference
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• 2021.05a
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• pp.273-274
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• 2021

This paper proposes a process to calculate the amount of construction and demolition (C&D) of underground vertical extension methods through considering the characteristics of used construction and demolished materials. The underground vertical extension methods analyzed in this paper were the bottom-up, normal top-down, and top-down methods with multi-post downward (MPD). In order to check the applicability of the proposed process, 24 illustrative examples were generated. The amount of C&D waste of the illustrative examples were calculated and compared. As the results, the top-down method with MPD was the most efficient method to reduce the amount of C&D waste.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2022.11a
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• pp.23-24
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• 2022

There are many demands for vertical extension construction method in domestic large cities. In this paper, we analyzed and presented the results of examining the cases of ground floor extension and basement extension using the jack pile method. Since the Jack Pile method presses in all the piles without excavating the ground, the bearing capacity of the all the piles can be checked. It was investigated as a safe construction method unlike other small-diameter pile construction methods during underground extension.

• Journal of the Korean Institute of Educational Facilities
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• v.24 no.1
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• pp.3-10
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• 2017

This study is to analyze the remodeling method of library in terms of space extension method and urban regeneration by repurposing function in unused facilities through case study. In many case of library extension, horizontal extensions are more frequent than vertical extensions, because there are limits to extend vertically due to high live load estimation by book stacks. Extension schemes was organized by new building extension method in connection with existing buildings, attaching method small scaled mass or linear mass to existing building, connecting method a plurality of existing small buildings, vertical extension method on the top of the structure, underground extension method using special structure. Unused facility remodeling to the library, large scaled buildings can be developed completely to the function of the library through the relocation of the space, while small scaled building needs spatial extension. In the case of spatial extension, existing space that was used for other purposes can be used as a reading room or office, avoiding high live load estimation.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2008.11a
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• pp.813-816
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• 2008

The increasing number of vehicles owned by individuals in association with the rising income resulted in an acute shortage of parking spaces. We are not only seeing a serious traffic congestion arising from the vehicles parked in the streets adjacent to apartment buildings, but also the social issues of not being able to properly prepare for the emergency such as breakout of fires. Although remodeling of old apartment buildings are being discussed in measures to these problems, the research of parking space expansion is still insufficient. In a survey on remodeling of old apartment buildings, over 30 percent of those who answered cited the parking space as the most needed improvement and said they preferred direct entry as a way to expand parking space among lateral underground expansion methods. The direct entry is a method in which one directly enters the apartment house from the parking lot through the elevator and it requires extended operation of elevators. However, because there are no established systematic processes for elevator extension and works of such kinds are not common, elevator extension works are being done in an inefficient manner. In this research we reanalyzed the processes in order to present the items to be examined for more efficient elevator extension works, and through interviews of experts in the field, we produced the examination items by process from the perspectives of management and technology. This research will be used as a reference material for elevator extension works associated with expanding underground parking lot of apartment buildings.