JUNCTION COUPLING OF TUNNEL, JUNCTION STRUCTURE OF TUNNEL AND JUNCTION METHOD OF TUNNEL

摘要

PROBLEM TO BE SOLVED: To safely and efficiently merge tunnels, to share parts, to reduce the term of works and remarkably reduce the cost of works, and to cope with various angles of confluence.;SOLUTION: This junction coupling 1 is used at the initial stage of confluence, and provided with a main track side socket 8 storing a permanent structure segment 4 of the main track tunnel 2 side, and a lamp side socket 9 storing the permanent structure segment 4 of the lamp tunnel 3 side. The storing spaces 12, 13 of both sockets 8, 9 are preset larger. In the junction structure 30 used at the middle stage of confluence, a blade-type segment 31 is used in common, so that a gap is adjusted by the lamp side taper segment 32 and a space liner 33. In the junction structure 40 used at the final stage of confluence, the main track side taper segment 41, the lamp side taper segment 42 and a taper liner 44 are used.;COPYRIGHT: (C)2006,JPO&NCIPI