| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a flexible joint structure which is installed under a situation of the presence of a large amount of infiltration water inflow in a construction joint of a concrete telephone-tunnel, which perform water cut-off by absorbing displacement during differential settlement or earthquakes, and which can sufficiently prevent breakage, coming-off, or the like of an expansion part being a rubber membrane body.SOLUTION: In a flexible joint structure, a flexible member, which includes an expansion part for covering a construction joint between adjoining telephone-tunnels and attachment pieces to the telephone-tunnels, on both sides thereof, is fixed. Valve pressure adjusting means is attached to prevent an excessive increase in internal pressure of the expansion part of the flexible member.</p> |
