| 摘要 |
PROBLEM TO BE SOLVED: To provide a falling-stone preventive device, by which a pumice is fixed surely under the state, in which natural environment is preserved extremely, without cutting down standing timber on a slope and falling stones can be prevented. SOLUTION: A plurality of first wire ropes 4, in which tips are fixed by support anchors 7, are tensed crosswise under the state, in which the wire ropes 4 are passed on pumices 3 through sections among the wire ropes 4 and standing timber 2, on a slope 1 dotted with the standing timber 2 and the pumices 3 while the crossed sections of these first wire ropes 4 are clamped by cross clips 8, and the first wire ropes 4 are retained under the state, in which the wire ropes 4 are placed along the undulations of the slope 1. The pumices 3, which may fall, are fixed separately by second wire ropes 5 and support anchors 6 at the tips of the wire ropes 5.
|
