A Case Study on Individually Controlled Pull-out Test for Ground Anchor

지반앵커의 인발시험을 위한 개별제어 긴장장치의 적용 사례 연구

  • Shin, Hyeon-Cheol (Gangseo-Gu Busan Metropolitan City. River & Sewage a Section) ;
  • Choi, Yong-Kyu (Dept. of Civil & Environmental Engineering, Kyungsung Univ.)
  • 신현철 (부산광역시 강서구청 하천하수개발담당) ;
  • 최용규 (경성대학교 건설.환경공학부)
  • Published : 2008.03.28

Abstract

To insure the quality and safety of ground anchors, pull-out test of anchor has to be done. In the individually controlled pull-out test system, pull-out device is used to introduce the same pull-out force to individual tendon that has a different length and a deflection. That is, that device has a separate pull-out oil jack to each tendon, thus the pull-out length of each jack is not the same, but that device introduces each tendon to the same pull-out force. In this study, the in-situ pull-out tests for the compression anchors were performed and its test results were analysed and compared to the results of center hole pull-out tests. In the case of pulling out each tendon using the individually controlled pull-out test device, the pull-out forces were distributed to a individual tendon. That device is excellent one that can solve the cause of unequal pull-out forces of each tendon appearing in the manufacture process and construction of anchors, and unequal pull-out forces due to the deferent length.

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