Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 2000.03a
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- Pages.85-106
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- 2000
Shear Load Transfer Characteristics of Drilled Shafts in Weathered Rocks
풍화암에 근입된 현장타설 말뚝의 하중 전이 특성
- Jeong, Sang-Seom (Department of Civil Eng., Yonsei Univ.) ;
- Cho, Sung-Han (Geotechnical Department, LG Construction Co., Ltd.) ;
- Kim, Soo-Il (Department of Civil Eng., Yonsei Univ.)
- Published : 2000.03.01
Abstract
The load distribution and deformation of drilled shafts subjected to axial loads were evaluated by a load transfer approach. The emphasis was on quantifying the load transfer mechanism at the interface between the shafts and surrounding highly weathered rocks based on a numerical analysis and small-scale tension load tests performed on nine instrumented piles. An analytical method that takes into account the soil coupling effect was developed using a modified Mindlin's point load solution. Based on the analysis, a single-modified hyperbolic model is proposed for the shear transfer function of drilled shafts in highly weathered rocks. Through comparisons with field case studies, it is found that the prediction by the present approach is in good agreement with the general trend observed by in-situ measurements.
Keywords
- shear load-transfer;
- drilled shaft;
- weathered rock;
- tension load test;
- soil coupling;
- single-modified hyperbolic model;
- in-situ measurements