A Study on the Development of Design Chart for Drilled Shaft Socketed into Weathered Zone Using DCPT (Driving Cone Penetrometer Test)

DCPT를 이용한 풍화대 소켓 현장타설말뚝의 설계도표 개발에 관한 연구

  • Received : 2009.10.13
  • Accepted : 2010.04.25
  • Published : 2010.05.31


For the development of design chart for drilled shafts socketed into weathered zone, the 6 bi-directional pile load tests with load transfer measurements done in two in-situ sites were performed. Also, DCPTs were performed in each test point. Maximum unit skin frictions and maximum unit end bearing capacities from pile load test results were analyzed. Inter-relationships between DCPT's characteristics were also analyzed. In the soils, the inter-relationships of maximum unit skin friction and DCPT appeared so low. But in the weathered zones, inter-relationships between maximum unit skin friction / maximum unit end bearing capacity and DCPT were so high that the coefficient of correlation is over 0.70.


  1. 대림산업(주), (주)지텍크, 경성대학교 산학협력단 (2008), "타격관입콘 시험장치 및 이를 이용한 지반 조사방법과 강도특정 산정방법", 특허 제 10-0847096호
  2. 대한토목학회 &교량설계핵심기술연구단 (2008), "도로교 설계기준 해설", pp.692-697.
  3. (사)한국지반공학회 (1997), "구조물 기초 설계기준", pp.38-39.
  4. 최용규, 권오성, 이종성, 최성순, 정성민 (2010), "풍화대소켓 현장타설말뚝의 극한단위선단지지력과 원위치 지반조사방법들과의 상관관계 분석", 대한토목학회논문집, 제30권 제 2C호, 2010년 3 월, pp.95-107.
  5. Nam, M. S. (2004), "Improved Design for Drilled Shafts in Rock", A Dissertation Presented for the Doctor Philosophy Degree of University of Houston, 2004. August, pp.333-335.
  6. TxDOT (2000), "Geotechnical Manual (On-Line Version)", Texas Department of Transportation, Bridge Division, Austin, Texas.