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

Jaehwan Lee, Kwangho You, Sangseom Jeong, Jaeyoung Kim

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


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 languageEnglish
Pages (from-to)596-606
Number of pages11
JournalSoils and Foundations
Issue number4
Publication statusPublished - 2013 Aug

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government (MSIP) (No. 2011-0030842 ).

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology


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