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A study on drainage system of the room-and-pillar underground structure considering groundwater conditions
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 Title & Authors
A study on drainage system of the room-and-pillar underground structure considering groundwater conditions
Lee, Chulho; Hyun, Younghwan; Hwang, Jedon; Chang, Soo-Ho;
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 Abstract
The room-and-pillar construction method for underground space is adopted from the room-and-pillar mining method which is one of the most popular underground mining method in the world. Drainage system in the room-and-pillar underground construction method can be similar with the concept of single shell in tunnel because additional reinforcement except the TSL (thin spray-on liner) is not applied in the room-and-pillar construction method. That is, to decrease groundwater level and maintain safety in tunnel, the drainage pin hole inside lining (shotcrete) can be used. However, if total amount of outflow in the underground structure is relatively small or groundwater is not detected, such drainage system will not be useful and cause additional construction cost. In this study, outflow of conventional tunnels in South Korea was investigated and the criteria to determine whether the drainage pin hole is effective was suggested. And the guided drainage system was suggested when drainage pin hole was not applied in the room-and-pillar construction method.
 Keywords
Room-and-pillar underground structure;Drainage system;Shotcrete;Tunnel;
 Language
Korean
 Cited by
 References
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