Joint structure null of application manner and the tunnel and connection union of the multiple circular arc condition

摘要

PPROBLEM TO BE SOLVED: To provide a connection structure of a multi-connected arched tunnel, between a tunnel and a connection body, which exerts excellent structural stability without increasing construction costs, and to provide a method of constructing the multi-connected arched tunnel. PSOLUTION: The method of constructing the multi-connected arched tunnel comprises the following three steps. In the first step, the tunnels 1, 2 in parallel with each other are constructed in the ground, and the tunnels 1, 2 have housing sections 11, 21 at locations that are connected to the connection bodies 3, 3', for housing part of the connection bodies, respectively. In the second step, a plurality of element pipes 31, 31, etc. are archedly constructed between the tunnels 1, 2 along a tunnel axial direction, and part of the element pipes 31, 31, etc. at both edges thereof are housed in the housing sections 11, 21 of the tunnels 1, 2, respectively. In the third step, the ground in a region enclosed by the connection bodies 3, 3' and both the tunnels 1, 2 is excavated, and part of the tunnels are removed to construct a permanent structure. PCOPYRIGHT: (C)2008,JPO&INPIT