| 摘要 |
PROBLEM TO BE SOLVED: To provide a construction method for a vaulted type underground structural body capable of easily constructing the firm vaulted type underground structural body even if the shape of an arch section is flat. SOLUTION: While connecting a plurality of joint attached cylinder bodies 10 to each other inside of a bedrock 2 as the arch section of a tunnel, they are inserted/embedded along the arch section, at the same time, both end sides of each joint attached cylinder 10 are fixed to reaction force plates 5A and 5B provided to advancing drifts 1A and 1B, and after a bundle of steel wires 20 passing through a plurality of joint attached cylinder bodies 10 have been arranged along the arch section 4, the inside of the joint attached cylinder body 10 is filled with concrete to construct a preceding support 10R as the vaulted type underground structural body, and then, while taking reaction force with reaction force plates 5A and 5B, the fixed ends 20a and 20b of a bundle of steel wires 20 are fixed to the reaction force plates 5A and 5B in a state to operate tension on a bundle of steel wires 20 so as to operate compressive force on the preceding support 10R in advance. COPYRIGHT: (C)2005,JPO&NCIPI |
