Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)

Korean Geotechnical Society (한국지반공학회)
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Effect of the Temperature Change on the Cone Tip Resistance

지중의 온도변화가 콘 선단저항력에 미치는 영향

  • Kim, Rae-Hyun (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Lee, Woo-Jin (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Yoon, Hyung-Koo (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Lee, Jong-Sub (School of Civil, Environmental and Architectural Engineering, Korea University)
  • 김래현 (고려대학교 건축.사회환경공학부) ;
  • 이우진 (고려대학교 건축.사회환경공학부) ;
  • 윤형구 (고려대학교 건축.사회환경공학부) ;
  • 이종섭 (고려대학교 건축.사회환경공학부)
  • Published : 2009.03.27
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Abstract

The criteria such as ASTM recommends that the zero reading process of CPT must be performed in the same temperature condition with underground in order to reduce the effect of temperature. However, this method can not consider the change of temperature occurred during penetration. In this study, ultra small size temperature sensor with 0.5mm in diameter is manufactured to estimate and compensate the effect of temperature by using FBG sensor. The continuous temperature changes are monitored during cone penetration by using FBG temperature sensor installed in cone penetrometer. The temperature compensated tip resistances show the uniform and similar distributions with depth in different with originally measured tip resistance in cohesive soil. This study verifies that the tip resistances measured by previous zero reading method are affected by the change of underground temperature, and suggests the new temperature compensation technique using by FBG temperature sensor.

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