| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure of a tunnel, and a construction method for the tunnel, which are suitable, for example, for construction of a ramp section of a road tunnel with a large cross section at a great depth, which dispense with soil improvement and various reinforcing construction methods to the utmost, which enable safe, rational and efficient construction, which enable a reduction in construction period and construction cost, which can be applied to either of a shield tunnel and a mountain tunnel, and which enable a road etc. to be rationally joined into one, branched or made wider. SOLUTION: A plurality of bent pipe-shaped buried pipes 17-19 are arranged in such a manner as to cross the longitudinal direction of the tunnel 1. Lining walls 23-25 are formed along the buried pipes 17-19. Both ends of the buried pipes 17-19 and both ends of the lining walls 23-25 are supported by both side sections of the tunnel 1. The tunnel 1 is provided in such a manner as to be capable of communicating with a main line tunnel 3 whereon a main line structure 6 is laid, and a branch line tunnel 4 whereon a branch line structure 8 is laid. The structure 6 and a separation/joining area 35, which can be separated from the structure 6 into the structure 8 or which can be joined to the structure 6 from the structure 8, are provided in the tunnel 1. COPYRIGHT: (C)2005,JPO&NCIPI
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