| 摘要 |
<p>PROBLEM TO BE SOLVED: To suppress a relative movement of an underground pipeline to a pithead part of an underground building in normal time or on the occurrence of a minor earthquake, in a connection part between the pithead part and the underground pipeline.SOLUTION: A connection device 10 is interposed between a lining body 8 and pithead concrete 5. The connection device 10 includes a pair of frames 11 and 12, a flexible water stop member 13 and a rib member 15. The frame 11 of a lining body side comprises an annular first plate-like member 21 fixed to the lining body 8 and a circular pipe-shaped first cover member 31. The frame 12 of a pithead part side comprises an annular second plate-like member 22 fixed to the pithead concrete 5 and a circular pipe-shaped second cover member 32. The water stop member 13 is fixed to these cover members so as to straddle between the first cover member 31 and the second cover member 32. The rib member 15 is interposed between the first plate-like member 21 and the second plate-like member 22 in the tunnel radial direction inside from the water stop member 13, and fixed to the first plate-like member 21 or the second plate-like member 22.</p> |
