| 摘要 |
PROBLEM TO BE SOLVED: To provide a starting method for a shield machine for a tunnel construction method which enables the shortening of a construction period and a reduction in construction cost. SOLUTION: In this starting method for the shield machine for the tunnel construction method wherein a tunnel passing underneath a road etc. is constructed by sequentially laying segments in an excavated section while excavating ground by means of the shield machine, a ground starting section 1 is provided in a section serving as an approach to the tunnel, and a reaction means 4 for taking reaction at the start of the shield machine 20 is provided on the ground 2. The reaction means 4 is a trestle 5 installed on the ground 2 of the ground starting section 1. The trestle 5 comprises a reaction pedestal 6 for taking the reaction at the start of the shield machine 20, and a starting pedestal 11 for supporting self-weight at the start of the shield machine 20. The reaction pedestal 6 and the starting pedestal 11 are supported by a plurality of piles 14 which are driven into the ground 2, and prevented from subsiding due to the self-weight of the shield machine 20. COPYRIGHT: (C)2006,JPO&NCIPI
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