| 摘要 |
<p>The barrier comprises posts (10) and a rock arresting and collecting net. Each post (10) is pivoted, preferably by means of a cardan joint, to a ground-anchored based plate and is stayed by guy cables (21, 22, 23) secured to its head, two guys (21, 22) diverging to horizontally spaced upstream anchorings, while a third guy (23) is attached to a downstream anchoring. The net is placed on and secured to a series of spaced longitudinal, horizontal ropes (30) which rest on the upstream guy cables (21, 22) and are connected thereto by means through which the horizontal ropes (30) are free to slide. The horizontal ropes (30) extend beyond the ends of the barrier, and their extremities are secured to ground anchoring means (33).</p> |
