METHOD FOR CONCURRENT SHIELD BORING AND SEGMENT ASSEMBLING

摘要

PROBLEM TO BE SOLVED: To provide a method for concurrent shield boring and segment assembling in which boring direction of a shield machine is easily controlled by simplifying pressure control on a propulsion jack and reduction in establishing cost is realized. ! SOLUTION: In a case of controlling boring direction of a shield machine 1 by position adjustment of a point of power application P to be a point of power accumulation whole thrust by all shield jacks 19 other than a shield jack 19 shortened correspondingly to a segment assembling position, a plurality of kind of selection patterns of a plurality of shield jacks 19 selected for controlling of boring direction is previously set; a selection pattern having the point of power application P at the closest position to a target point of power application Po is extracted from the plurality of kind of selection patterns; and pressure provided by the plurality of selected shield jacks 19 with the extracted selection pattern is reduced by the same decompress