Proposed point bearing load transfer function in jointed rock-socketed drilled shafts

Jaehwan Lee; Kwangho You; Sangseom Jeong; Jaeyoung Kim

doi:10.1016/j.sandf.2013.06.010

Proposed point bearing load transfer function in jointed rock-socketed drilled shafts

Jaehwan Lee, Kwangho You, Sangseom Jeong, Jaeyoung Kim

Department of Civil and Environmental Engineering

Research output: Contribution to journal › Article

11 Citations (Scopus)

Abstract

The point bearing behavior of rock-socketed drilled shafts under axial loading is investigated by numerical analysis and a load transfer approach (ρ-w). A numerical analysis using the distinct element method (DEM) is carried out to investigate the effects of pile diameter and the elastic modulus, discontinuity spacing and the inclination of rock mass on the point bearing behavior. The emphasis is quantifying the point bearing mechanism by taking rock discontinuity into consideration based on field loading tests performed on 39 instrumented piles. A new hyperbolic q-w function is proposed considering the point bearing resistance influence factors, including rock mass discontinuity. Through comparisons with other field data, the proposed q-w function represents a significant improvement in the prediction of the point bearing load transfer characteristics of jointed rock-socketed drilled shafts.

Original language	English
Pages (from-to)	596-606
Number of pages	11
Journal	Soils and Foundations
Volume	53
Issue number	4
DOIs	https://doi.org/10.1016/j.sandf.2013.06.010
Publication status	Published - 2013 Aug

All Science Journal Classification (ASJC) codes

Civil and Structural Engineering
Geotechnical Engineering and Engineering Geology

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10.1016/j.sandf.2013.06.010

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Lee, J., You, K., Jeong, S., & Kim, J. (2013). Proposed point bearing load transfer function in jointed rock-socketed drilled shafts. Soils and Foundations, 53(4), 596-606. https://doi.org/10.1016/j.sandf.2013.06.010

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abstract = "The point bearing behavior of rock-socketed drilled shafts under axial loading is investigated by numerical analysis and a load transfer approach (ρ-w). A numerical analysis using the distinct element method (DEM) is carried out to investigate the effects of pile diameter and the elastic modulus, discontinuity spacing and the inclination of rock mass on the point bearing behavior. The emphasis is quantifying the point bearing mechanism by taking rock discontinuity into consideration based on field loading tests performed on 39 instrumented piles. A new hyperbolic q-w function is proposed considering the point bearing resistance influence factors, including rock mass discontinuity. Through comparisons with other field data, the proposed q-w function represents a significant improvement in the prediction of the point bearing load transfer characteristics of jointed rock-socketed drilled shafts.",

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AB - The point bearing behavior of rock-socketed drilled shafts under axial loading is investigated by numerical analysis and a load transfer approach (ρ-w). A numerical analysis using the distinct element method (DEM) is carried out to investigate the effects of pile diameter and the elastic modulus, discontinuity spacing and the inclination of rock mass on the point bearing behavior. The emphasis is quantifying the point bearing mechanism by taking rock discontinuity into consideration based on field loading tests performed on 39 instrumented piles. A new hyperbolic q-w function is proposed considering the point bearing resistance influence factors, including rock mass discontinuity. Through comparisons with other field data, the proposed q-w function represents a significant improvement in the prediction of the point bearing load transfer characteristics of jointed rock-socketed drilled shafts.

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