METHOD OF PLACING SECONDARY LINING CONCRETE, AND FRAMEWORK FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To drop the fresh concrete adhered to a top end of a tunnel before it is solidified when placing the secondary lining concrete. SOLUTION: The concrete is placed while vibrating a peripheral part (for example, a vibration framework part 11) of a concrete placing blowup port 12 provided at a top end part of a center 1.