| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water cutoff and protection device of a tunnel penetrating through an active fault or the like, for decreasing damages caused by a change in the fault when an earthquake, occurs in an active fault, an active fault zone, a geological change zone, an entrance, a widened sectional zone of a tunnel, a curved tunnel concrete laid section, a tunnel branching section, a tunnel crossing section, etc. Ž<P>SOLUTION: In a mortar spraying method spraying mortar to the inner side 31 of an excavated tunnel or in a lagging method a liquid elastic seal material 51 is injected into portions penetrating through an active fault or the like, one or a plurality of non-woven fabric tubes 5 filled with an elastic sealing material are placed in contact with the site, or one or a plurality of tabular base isolating material sheets are placed in contact with the site. Then, a sheet material 7 is fixed, and further concrete 32 is placed. Further, a liquid elastic seal material 61 is additionally injected into a rubber chip plate shaped section between the natural ground and the non-woven fabric tubes after a secondary covering is placed. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
