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http://dx.doi.org/10.7843/kgs.2019.35.12.25

Proposed Deterioration-induced Axial Stiffness of Existing Piles in Vertical Extension Structures  

Jeong, Sang-Seom (Dept. of Civil and Environment Engrg., Yonsei Univ.)
Kim, Do-Hyun (Dept. of Civil and Environmental Engrg., Massachusetts Institute of Technology)
Cho, Hyun-Chul (Hyundai Engineering and Construction)
Publication Information
Journal of the Korean Geotechnical Society / v.35, no.12, 2019 , pp. 25-33 More about this Journal
Abstract
In this study, the axial stiffness of existing piles (Kve) of vertical extension remodeled building was quantified through theoretical and experimental approaches. Theoretically induced upper and lower boundary of the pile axial stiffness was estimated by using the formula proposed by Randolph and Wroth (1978), which can estimate the axial stiffness of rigid and flexible pile subjected under soil confinement. In addition, 38 cases of field measurement data on deteriorated piles with various diameters constructed in the period between 1995 - 1997 were taken in to account by overlapping the field data with the theoretical boundary of the axial stiffness. Through this the maximum axial stiffness of existing pile due to deterioration and long service time was presented for various slenderness ratio (L/D), which can be used in estimating the necessary axial stiffness of reinforcing piles(Kvr) for the vertical extension remodeling. The lower 95% value of the estimated axial stiffness of existing pile will be induced through statistical processing.
Keywords
Axial stiffness; Field measurements; Pile deterioration; Piled-raft foundation; Reinforcing pile; Vertical extension remodeling;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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