SEGMENT WITH BAG AND SHIELD METHOD

摘要

PROBLEM TO BE SOLVED: To shorten a void exposing time in a shield method using a segment with a bag. SOLUTION: This segment 11 with a bag 13 inflated to the outer peripheral side of the segment is divided into bags 13 in the lateral direction of the segment 11. The divided bags 13 are inflated at an over break part 7. The segment comprises an expansion segment 12 extrudable to the outer peripheral side of the segment 11. The extension segment 12 is extruded after the bags 13 divided in the over break part 7 are inflated. COPYRIGHT: (C)2008,JPO&INPIT