| 摘要 |
PROBLEM TO BE SOLVED: To provide a cutting removal construction method for an underground skeleton for holding a shape of a protection wall along a shape of an underground wall and eliminating a necessity of working on a track side when cutting and removing the underground wall. SOLUTION: Anchors 5, 5, etc. are driven into the underground wall 2 of an existing skeleton, and supporting bar members 511 (512) are detachably fixed on the driven anchors 5, 5, etc. by attaching each connection device 52 welded on the supporting bar member 511 to the anchors 5 by nuts 53, respectively, to hold the shape of the protection wall 3 by fastening it on the supporting bar member 511 by screws. The connection of each anchor 5 in the underground wall 2 to be removed with the connection device 52 is released, an auxiliary bar member is fixed to a remaining part of the existing skeleton after removing the underground wall 2, and the connection device 52 is fixed to the auxiliary bar member to support the supporting bar member 511 and hold the shape of the protection wall 3. COPYRIGHT: (C)2007,JPO&INPIT
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