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Behavior Characteristics of Underreamed Ground Anchor through Field Test and Numerical Analysis  

Kim, Gyuiwoong (Korea Rail Network Authority Honam Regional Headquarters)
Ahn, Kwangkuk (Chungbuk University Department of Civil Engineering)
Min, Kyongnam (Sejong E&C)
Jung, Chanmuk (Woosong University Department of Railroad and Transportation)
Publication Information
Journal of the Korean GEO-environmental Society / v.14, no.8, 2013 , pp. 37-44 More about this Journal
Abstract
The superiority of bearing ground anchor system has been recognized for the stability and economical efficiency since 1950s in Japan, Europe and etc. The ground anchor introduced in Korea, however, has the structural problem that the tensile strength comes only from the ground frictional force caused by the expansion of the wedge body and it is impossible to evaluate the bearing resistance because the adhering method of the anchor body to hollow wall is not appropriate. In this study, the underreamed ground anchor system was developed so that the bearing pressure of ground anchor can exert as much as possible. And the in-situ tests were performed to evaluate the pullout behavior characteristics and to verify the decreasing effect of the bonded length. The pullout tests were performed with the non-grouted tension condition and grouted tension condition in order to identify the pull-out resistance of each conditions. In addition, it was compared with the results of friction anchor. Finally, the numerical analysis was fulfilled to verify the bearing effect at the bonded part through the detailed modeling by PLAXIS-2D, which is general finite element method analysis program.
Keywords
Underreamed; Bearing ground anchor; Pullout test; Numerical analysis;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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