| 摘要 |
PROBLEM TO BE SOLVED: To provide a double tunnel construction method, a joint part segment and an assembling device for constructing two tunnels simultaneously as an integrated tunnel without requiring large occupying site width. SOLUTION: Excavation is performed by a shield machine 20 which excavates two tunnels 10, 11 at the same time, and a ribbon segment 13 constituting a part of the respective tunnels 10, 11 is arranged at a joint part 12 of two tunnels. Then, segments 14, 15 of two tunnels 10, 11 are simultaneously assembled to construct a double tunnel 1. The ribbon segments 13 are arranged, reversed for every ring. COPYRIGHT: (C)2004,JPO
|
