Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Rock Socket Roughness with Drilling Tools

굴착장비에 따른 암반근입말뚝의 공벽 거칠기

  • Nam, Moon-S. (Dept. of Geotechnical Engrg., Highway & Transportation Technology Institute, Korea Highway Corp.)
  • Published : 2007.01.31
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Abstract

Rock socketed drilled shafts are used as foundations for bridges and other transportation structures because of their load carrying capabilities. However, only limited information is available in the literature on the effects of roughness on the unit side resistance of rock socketed drilled shafts. The objective of this study is to investigate the effect of drilling tools on the socket roughness in soft clay shale in Texas. Field study showed that the drilling tools, auger and core barrel, produced different roughness in the boreholes.

암반에 근입된 현장타설말뚝은 뛰어난 암반의 지지능력을 이용함으로써 교량이나 다른 대형구조물의 기초형식으로 널리 사용 중이다. 이러한 암반 근입 말뚝의 지지력은 주면 마찰력과 선단지지력으로 나누어 지는데 이 중 암바부의 주면마찰력이 대부분의 상부하중을 지지하는 경우가 많다. 몇몇의 연구자들에 의하여 암반 근입부의 공벽 거칠기가 주면마찰력에 영향을 준다는 보고를 하였으나, 거칠기에 중요한 영향을 미칠 것으로 판단되는 굴착장비에 따른 거칠기에 관한 연구는 부족한 실정이다. 본 연구에서는 현장시험을 통하여 암반 굴착장비에 따른 공벽 거칠기에 대한 영향을 분석하였고, 그 결과로 굴착도구가 거칠기에 영향을 미치는 것으로 확인되었다.

Keywords

References

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