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http://dx.doi.org/10.7843/kgs.2012.28.1.55

Load Transfer Mechanism of Hybrid Model of Soil-nailing and Compression Anchor  

Seo, Hyung-Joon (School of Civil, Environmental and Architectural Engineering, Korea Univ.)
Kim, Hyun-Rae (Ghari Geotechnology 22 co., Ltd.)
Han, Shin-In (Seoyeong Engineering Co., Ltd.)
Lee, In-Mo (School of Civil, Environmental and Architectural Engineering, Korea Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.28, no.1, 2012 , pp. 55-66 More about this Journal
Abstract
The load transfer mechanism of hybrid model of soil-nailing and compression anchor is studied in this paper. The hybrid model is composed of an anchor bar (installed at the tip) with two PC strands and a steel bar. It can make active behavior of skin friction by applying the pre-stress. In this paper, the load transfer mechanisms of soil-nailings, compression anchors, and hybrid models, respectively, are obtained from skin friction theory and load transfer theory. Field pullout tests are performed to identify the load transfer mechanism and experimental results are compared with analytical solution. In case of soil-nailings, the tension load is transferred from face to tip, however, in case of compression anchors, the compression load is transferred from tip to face. The experimental behavior of the hybrid model is similar to that of compression anchor when only pre-stress is applied. If the pullout test is performed by simultaneously pulling out the anchor and the nail, the compression load is dominant at the tip and tension load is dominant at the face. The load transfer mechanism of the hybrid model shows the combined behavior of soil-nailings with compression anchors.
Keywords
Hybrid Model of Soil-nailing and Compression Anchor; Load Transfer Mechanism; Pre-stress; Skin Friction;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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