| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a construction method for a multiply extendable permanent anchor capable of maximizing bearing power using the frictional resistance of an anchor body and the bearing pressure of an extending anchoring part by multiply extending an anchor using a first extending wedge and a second extending wedge and separating the top and the bottom of the extending wedges from each other at regular intervals.SOLUTION: The construction method for a multiply extendable permanent anchor can achieve firm close contact and frictional support force even in a ground largely weathered or in a crushed ground as well as in a base rock, by multiply extending an anchor body in a system of primary extension by the first impact added to a striking head, secondary and tertiary extension by tensile force added to a steel stranded wire.</p> |
