Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 2009.03a
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- Pages.1125-1132
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- 2009
Development of Rock Stress Measurement Probe Based on The Pilot Hole Wall Deformation Method
Pilot 공벽변형법에 의한 암반응력 측정 장비의 개발
- Lee, Ki-Ha (Geotechnical Disaster Environment Research Division, Korea Institute of Construction Technology) ;
- Ishijima, Yoji (Horonobe Research Institute for the Subsurface Environment) ;
-
Koo, Ho-Bon
(Geotechnical Disaster & Environment Research Division, Korea Institute of Construction Technology)
;
- Kim, Seung-Hyun (Geotechnical Disaster & Environment Research Division, Korea Institute of Construction Technology)
- 이기하 (한국건설기술연구원 지반방재.환경연구실) ;
- 석도 양이 (Horonobe지권 연구소) ;
-
구호본
(한국건설기술연구원 지반방재.환경연구실)
;
- 김승현 (한국건설기술연구원 지반방재.환경연구실)
- Published : 2009.03.27
Abstract
The theory and a probe of the pilot hole wall deformation method, which is a 3-dimensional stress measurement method based on the stress relief principle, were developed. A pilot hole is drilled from the bottom of a borehole and the stress measurement probe is inserted into the pilot hole. The borehole is advanced as the overcoring and the changes in the radius of the pilot hole in three directions and in the axial lengths between the borehole bottom and the pilot hole wall along four axial lines are measured by cantilever type-displacement sensors. The differences between the displacements by the elastic stress analysis and those measured by using the probe were within 3% in the uniaxial compression test of an acrylic resin plate having a hole.