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http://dx.doi.org/10.7843/kgs.2017.33.1.67

Evaluation Method for Uplift Load-carrying Capacity of Inclined Group Micropiles in Dense Sand  

Kyung, Doohyun (Dept. of Civil and Environmental Engrg., Yonsei Univ.)
Kim, Garam (Dept. of Civil and Environmental Engrg., Yonsei Univ.)
Kim, Incheol (Dept. of Civil and Environmental Engrg., Yonsei Univ.)
Lee, Junhwan (Dept. of Civil and Environmental Engrg., Yonsei Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.33, no.1, 2017 , pp. 67-77 More about this Journal
Abstract
In the present study, uplift load carrying behavior of micropiles with installation angle and pile spacing was investigated based on uplift load tests using single and group micropiles. In addition, evaluation methods of uplift load carrying capacity of group micropiles were proposed based on FHWA (2005) and Madhav (1987) and they were compared with test results to confirm the validity of proposed methods. From the test results, uplift load carrying capacities of single and group micropiles increased with the increase of the installation angle up to $30^{\circ}$, whose values also increased slightly with increasing pile spacing. For the proposed method based on FHWA (2005), the estimated values were similar to measured values up to $15^{\circ}$ of installation angle and 5D of pile spacing. For the proposed method based on Madhav (1987), on the other hand, it was observed that the estimated values were in good agreement with measured values in all installation conditions.
Keywords
Single micropile; Group micropiles; Uplift load test; Uplift load carrying capacity; Dense sand;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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