수중에서 적용가능한 대구경 현장타설말뚝의 굴착공 벽면거칠기 측정장치의 보정에 관한 연구 = Calibration of Borehole Roughness Measurement System for Large Diameter Drilled Shafts in Water

다국어 초록 (Multilingual Abstract)

Based on recent studies on rock socketed drilled shafts, it was found that the side resistance of rock socketed drilled shafts is affected by unconfined compressive strength of rock, socket roughness, rock types and joints, and initial normal stress. Especially, the socket roughness is affected by rock types and joints, drilling methods, and diameters. Since existing roughness measurement systems could be conducted only in the air, a new roughness measurement system, which can measure rock socket roughness in the air and also in the water, is needed. However, the development of new roughness measurement system for civil engineers has been faced with difficulties of electrical applications. In this study, the laboratory verification system for BKS-LRPS (Backyoung-KyungSung Laser Roughness Profiling System) was developed, which can be applied both in the water and air. Based on the laboratory verification, it was found that the improved BKS-LRPS could define effective measurement distances for the conditions reflecting the apparatus and in-situ situations.

참고문헌 (Reference)

1 이명환, "국내 암반에 근입된 현장타설말뚝의 소켓벽면 거칠기에 관한 연구" 431-438, 2003

2 Collingwood, B., "The Effects of Construction Practices on the Performance of Rock Socket Bored Piles" Monash University 2000

3 Horvath, R. G., "Methods of Improving the Performance of Drilled Piers in Weak Rock" 20 : 758-772, 1983

4 Nam, M. S., "Improved Design for Drilled Shafts in Rock" University of Houston 2004

5 O’Neill, M. W., "Drilled Shafts: Effects of Construction on Performance and Design Criteria" 1994

6 Liang, R., "Development of A Laser Triangulation Distance Measurement Device and Its Application to Borehole Roughness Detection" University of Houston 2002

7 박봉근, "BKS-LRPS(Backyoung-Kyungsung Laser Roughness Profiling System)의 개발 및 검증에 관한 연구" 경성대학교 대학원 2007

8 Seidel, J. P., "A New Socket Roughness Factor for Prediction of Rock Socket Shaft Resistance" 38 : 138-153, 2001