PULL-OUT FORCE INCREASING METHOD FOR GROUND ANCHOR

摘要

PROBLEM TO BE SOLVED: To provide a pull-out force increasing method for a ground anchor, for solving the problem wherein an anchor adhering to a stable ground is often pulled out, and it is considered to result from that an anchoring body is biased to the lower side of a bored hole to make the contact area with an anchoring material insufficient, and further the frictional force to the hole wall is insufficient due to the bad quality of the anchoring material is poor in quality, and on the other hand, it is considered to be a little affected by that when large tension is required, naturally a tendon is increased in thickness so that a difference in level from the anchoring body is eliminated to decrease the bearing sectional area at the front of the anchoring body.;SOLUTION: (1) The anchoring body and the tendon are installed in the center of the bored hole by this developed press-in friction device, a clasp type center lift device and a guide hole. (2) In a casing, a friction plate is pressed in between the hole wall and a moving frame through the clasp type center lift raised in the bored hole.;COPYRIGHT: (C)2009,JPO&INPIT