| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a shaft wall structure by which the wall surface of a shaft which becomes a start part or arrival part of a shield machine is easily cuttable and the shaft can be constructed without largely increasing cost as compared with a conventional shaft. <P>SOLUTION: Anchor fixation holes 7 reaching the inside of a ground G around a shaft A are bored from an easily cuttable part 1a provided on a first plane wall 1 of the shaft A obliquely downward. An anchor bolt 4 is inserted into each anchor fixation hole 7, and the anchor bolt 4 is fixed to the ground via a fixing material injected in the bolt insertion hole in the state that one end of the anchor bolt 4 projects in the inside of the shaft A. A reinforcement material 3a made of an easily cuttable material is pressed onto a shaft inner wall surface of the easily cuttable part 1a by a nut 5 screwed on one end of the anchor bolt 4 so as to suppress deflection of the easily cuttable part 1a toward the inside of the shaft A due to soil/water pressure. <P>COPYRIGHT: (C)2013,JPO&INPIT |
