| 摘要 |
PROBLEM TO BE SOLVED: To provide a tunnel construction method for enabling sufficient high speed construction by early construction of a floor slab. SOLUTION: For performing digging and floor slab construction in parallel by constructing the floor slab 4 following and right behind the digging of a tunnel excavator such as a shield machine 1, a crane 11 is arranged between a succeeding carriage 2 and the constructed floor slab behind the carriage so as to be capable of advancing, and the floor slab is extended forward by arranging a PCa slab 10 for forming the floor slab in a tunnel bottom part by the crane, and the crane is advanced together with the succeeding carriage by following the digging of the tunnel excavator. COPYRIGHT: (C)2006,JPO&NCIPI
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