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SHIELD MACHINE, ENLARGED CONSTRUCTION METHOD FOR SHIELD TUNNEL AND REDUCED CONSTRUCTION METHOD FOR THE SHIELD TUNNEL
SHIELD MACHINE, ENLARGED CONSTRUCTION METHOD FOR SHIELD TUNNEL AND REDUCED CONSTRUCTION METHOD FOR THE SHIELD TUNNEL
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机译：盾构机，盾构隧道的扩大施工方法和盾构隧道的简化施工方法
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摘要
PROBLEM TO BE SOLVED: To provide a construction method for a shield tunnel capable of facilitating the construction of a safe and economical standard tunnel and an enlarged tunnel regardless of the depth, acting earth pressure/hydraulic pressure of a tunnel, shortening a construction period of time and reducing a construction cost.;SOLUTION: The first shell split body 7x and the second shell split body 7y consisting of first and second skin plates 8x and 8y divided into two parts and a ring girder can be rotated with the axis of a hinge 13 inserted in a crown section Ac as the center, and the enlargement of a shape of the shell by rotating it to the outside and the reduction of a shape of the shell by rotating it to the inside are carried out. Accordingly, first and second shield machine split bodies Ax and Ay dividing a tunnel excavator body equipped with the first and second shell split bodies 7x and 7y can also reduce or enlarge a cross section by the same operation, and the shield machine has such a constitution that the cross section can be freely enlarged and reduced.;COPYRIGHT: (C)2005,JPO&NCIPI
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