| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water cutoff structure between a tunnel lining constructed by a non-open-cut method and an underground skeleton constructed by a different method. <P>SOLUTION: A tunnel lining 20 is constructed by a non-open-cut method. The tunnel lining 20 and an underground skeleton constructed by a different process are combined into an underground structure, which has a water cutoff structure between the tunnel lining 20 and the underground skeleton. The water cutoff structure includes a water cutoff member 31 placed between neighboring rings (tunnel box bodies 22 and 22) in the tunnel longitudinal direction. An exposed part 33 formed of an end part of the water cutoff member 31 is exposed from the surface of the tunnel lining 20. A waterproof sheet 35 for covering the underground skeleton has a pendent part 35a at an end, which comes in surface contact with the surface of the tunnel lining 20 and the exposed part of the water cutoff member 31. <P>COPYRIGHT: (C)2013,JPO&INPIT |
