| 摘要 |
<p>PURPOSE:To easily observe real behavior by coupling the lower end of a flexible tube with the top surface of a sediment shield board and also linking a space and the flexible tube with each other through the hole of the sediment shield board, and inserting a lead for observation into the flexible tube. CONSTITUTION:When the behavior of the tube connection part 2 is observed, water or air is discharged from a water bag or air bag 9 through a host 91 to form a no-land part. At the no-land part, the water or air bag 9 contracts and base reaction force becomes zero, so the conduit at the part sinks and when a tube connection part 2 is present at or nearby the no-land part, the tube connection part 2 also moves and an insertion opening 22 also moves to a receiving opening 21. This movement can be observed by inserting the observation lead 81 into a corrugated plastic tub 6 from on the ground and reading the scale of a sheet with graduation.</p> |
