Prevents rock falls and rock slides of 1,000 tons or more impossible with conventional technology.
This method employs the new UB rope anchor to provide a large holding force unaffected by ground conditions, and hanger elements and wire rope to apply a strong restraining force to constrain the rocks.
The number of hanger elements and wire ropes are increased to accommodate large rocks.
Light-weight components permit ready installation in a short time. This method has been used at heights of approximately 200m above the road.
| Rock size | 100kN or heavier |
| Maximum rock fall energy | ― |
| Direct construction costs | Y1,500,000 or more |
The new UB rope anchor employs a wire rope in the body of the anchor. The tip of the anchor is expanded in the ground to form a bulbous shape which provides a base for fixing the rocks in place.
*1 Operation normally possible with boring machinery.
*2 Varies with ground conditions.
