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http://dx.doi.org/10.12814/jkgss.2018.17.4.029

Analysis of Helical Pile Behavior in Sands Varying Helix Pitch Based on Numerical Analysis Results  

Bak, Jongho (Department of Civil and Environmental Engineering, Incheon National University)
Lee, Kicheol (Department of Civil and Environmental Engineering, Incheon National University)
Choi, Byeong-Hyun (Department of Civil and Environmental Engineering, Incheon National University)
Kim, Dongwook (Department of Civil and Environmental Engineering, Incheon National University)
Publication Information
Journal of the Korean Geosynthetics Society / v.17, no.4, 2018 , pp. 29-40 More about this Journal
Abstract
Oil sands, which are largely distributed in Canada and Venezuela, are a mixture of crude oil and sandy soils. In order to extract crude oil from oil sands, construction of massive oil sand plants is required. Generally, the typically-used foundation types of the oil sand plant are driven piles and cast-in-place piles. Most of the oil sand plants are located in cold and remote regions. Installation of driven piles in frozen or organic surface soils is difficult due to high resistance and installation equipment accessability, while the cast-in-place pile has concrete curing problem due to cold temperature. Helical pile can be installed quickly and easily using rotation with a little help of vertical load. As the installation of helical pile is available using a small and light-weight installation equipment, accessibility of installation equipment is improved. The helical pile has an advantage of easy removal by rotation in reverse direction compared with that of installation. Furthermore, reuse of removed helical piles is possible when the piles are structurally safe. In this study, the behavior of helical piles varying helix pitch was analyzed based on the numerical analysis results. Numerical model was calibrated based on the results of model helical pile tests in laboratory. The ultimate helical pile loads, the displacement of each helix attached to the shaft of the helical pile, and the load sharing ratio of each helix were analyzed.
Keywords
Oil sand; Helical pile; Model laboratory test; Numerical analysis; Helix pitch; Ultimate load; Displacement; Load sharing ratio;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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