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Estimation of Pile Resistance Factor by CPT Based Pile Capacity  

Kim Dae-Ho (Dept. of Highways & Bridge, Daewoo Engrg. Co.)
Lee Jun-Hwan (Dept. of Civil Engrg., Yonsei Univ.)
Kim Bum-Joo (Dam Safety Research Center, Korea Institute of Water and Environment, Korea Water Resources Corporation)
Publication Information
Journal of the Korean Geotechnical Society / v.21, no.10, 2005 , pp. 113-122 More about this Journal
Abstract
Application of Limit State Design in geotechnical engineering has become world-widely popular. While LRFD code in the North America presents geotechnical load and resistance factors, the values of resistance factors proposed by these methods are still unstable with limited application. CPT has been widely used for the pile design and various methods have been proposed to estimate the bearing capacity of piles. In this paper, resistance factors for representative pile design methods based on CPT results are evaluated. Field pile load test and CPT results were collected and analyzed in order to obtain necessary statistical data and resistance factors. Resistance factors of the base, shaft, and total capacity are estimated. From fisrt order second moment (FOSM) analysis, resistance factors of $0.30{\sim}0.55$ are estimated for total load capacity.
Keywords
CPT; Limit state design; Load resistance factored design; Pile design;
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