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http://dx.doi.org/10.7843/kgs.2022.38.4.21

Performance Evaluation of Pull-out Load of a New Type of Double-wall Pile Foundation for Easy Demolition  

Kim, Jae-Hyun (Dept. of Civil Engrg., The College of Art, Culture and Engrg., Kangwon National Univ.)
Kim, Jeong-Soo (Dept. of Future & Smart Construction Research, Korea Institute of Civil Engrg. and Building Technology)
Lee, Minjy (Dept. of Civil and Environmental Engrg., Kongju National Univ.)
Sven, Falcon Sen (Dept. of Civil and Environmental Engrg., Kongju National Univ.)
Choo, Yun Wook (Dept. of Civil and Environmental Engrg., Kongju National Univ.)
Hwang, Sung-Pil (Dept. of Geotechnical Research, Korea Institute of Civil Engrg. and Building Technology)
Publication Information
Journal of the Korean Geotechnical Society / v.38, no.4, 2022 , pp. 21-32 More about this Journal
Abstract
Steel pile foundations are widely used for offshore constructions due to their high bearing capacity and efficiency. Typically, offshore structures that have reached the end of their design life are required to be demolished. However, pile foundations are often left on site due to technical and economic limitations. The pile left on the site not only pollutes the environment, but can also cause obstacles for the construction of new structures. Therefore, research is required to completely eliminate these foundations at the site. In this study, a new type of double-wall pile foundation that can drastically reduce the pull-out load was conceptually proposed, and a series of model tests were performed to validate the performance of the double-wall pile foundation. The installation and extraction of the double-wall pile were simulated in dry sand in the model test, and the measured up-lift load was compared to that of the conventional pile. According to the result, the maximum up-lift load induced by the decommissioning of the double-wall pile was reduced by 45% when compared to the traditional pile in dense sand. This study verified the mechanism for reducing the up-lift load of the double-wall foundation and confirmed the possibility of completely decommissioning a pile that has reached the end of its nominal service life.
Keywords
Decommissioning; Double-wall pile foundation; Offshore structures; Pile foundation; Pull-out;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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