암반 정착 대구경 피어기초의 거동특성에 관한 연구

The Behavior of Large Diameter Rock Socketed Piles

  • 김태현 (다산이엔지 지반사업본부 지반사업2부) ;
  • 김찬국 (단국대학교 토목환경공학과) ;
  • 황의석 (대림산업(주) 건설사업부) ;
  • 이봉열 (씨지이엔씨) ;
  • 김학문 (단국대학교 토목환경공학과)
  • 발행 : 2006.03.24

초록

The rapid growth of the economy recently gas led to increasing social needs for large scaled structures, such as high-rise buildings and long span bridges. In building these large-scaled structures the trend has been to construct foundations beating on or in rock masses in order to ensure stability and serviceability of the structure under several significant loads. However. when designing the drilled shaft foundation socketed in rock masses in Korea, the bearing capacity for the pier used to be determined by using the empirical expression, which depends on the compressive strength of the rock, or presumable bearing capacity recommended on foreign references or manuals. In this study, numerical analyses are used to trace rock-socketed pile behavior and are made alike with pile load test result in field. The result of this numerical analyses study have shown that following factors have a significant influence on the load capacity and settlement of the pier. Significant influence first factor of the geometry of the socket as defined by the length to diameter ratio. Second factor of the modulus of the rock both around the socket and below the base. third factor of the condition of the end of the pier with respect to the removal of drill cuttings and other loose material from the bottom of the socket.

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