| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a fish pass capable of reducing a construction period by stably fixing a gigantic stone even when not installing a foundation structure. <P>SOLUTION: In a fish pass constituted by disposing gigantic stones 3 comprising natural stones, paving stones 2 for fixing the gigantic stones are laid on a river bed section 1 to constitute a paving stone layer; the plurality of gigantic stones 3 are disposed on the paving stone layer; the gigantic stones 3 are fixed by having lower portions of the gigantic stones 3 buried in the paving stone layer; concrete is placed among the gigantic stones and in the upper section of the paving stone layer to form a concrete section; and a pool section is formed on the upstream side of the gigantic stones. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
