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http://dx.doi.org/10.7843/kgs.2022.38.9.53

Three-Dimensional Numerical Analysis for Verifying Behavioral Mechanism and Bearing Capacity Enhancement Effect According to Tip Elements  

Lee, Seokhyung (Korea Institute of Civil Engrg. and Building Technology)
Kim, Seok-Jung (Korea Institute of Civil Engrg. and Building Technology)
Han, Jin-Tae (Korea Institute of Civil Engrg. and Building Technology)
Jin, Hyun-Sik (Hydraulic and Geotechnical Consultants)
Hwang, Gyu-Cheol (Jaesung Construction Co. Ltd.)
Lee, Jeong-Seob (Sejin E&C Co. Ltd.)
Publication Information
Journal of the Korean Geotechnical Society / v.38, no.9, 2022 , pp. 53-67 More about this Journal
Abstract
Micropiles are cast-in-place-type piles with small diameters. They are widely used for the foundation reinforcement of existing buildings and structures because this technique is easy to construct and economic. A base expansion structure is developed following the mechanism of radial expansion at the pile tip under compression. Numerical analysis, durability tests, and centrifuge tests have been conducted using the base expansion structure. In this study, three-dimensional numerical modeling was performed to describe the behavioral mechanism of the base expansion structure using steel bar penetration under compressive loading, and numerical analyses using centrifuge test conditions were performed for the comparative studies. Additionally, the base structure was modified based on the results of lab-scale analyses, and the bearing capacities of micropiles were compared using field-scale numerical analyses under various ground conditions.
Keywords
Base expansion; Earth pressure; Foundation reinforcement; Micropile; Numerical analysis;
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