| Title | Geotechnical Engineering, Tunnel Engineering : Tunnel Engineering ; A Study on Development of the Backfilling Material for the Cavity behind the Tunnel Liner using the Stone-dust and application in the old Tunnel | 
					
	| Keywords | tunnel lining cavity ; lightweight concrete ; stone dust ; backfilling ; 터널배면공동 ; 석분토 ; 뒤채움용 모르타르 ; 경량기포콘크리트 |