抄録
Pulling test was carried out in order to examine the pulling out characteristic of permanent ground anchors of compression type having a large diameter settled in hard clay and soft rock. It was found that the level of the ultimate frictional stress was equal to the value of anchors which has usual diameter in the past, and the ultimate frictional stress was possible to presume by using the value of undrained shear strength, and the displacement of anchorage zone at the pulling out time was about 10mm.
