한국지반공학회지:지반 (Geotechnical Engineering)

한국지반공학회 (Korean Geotechnical Society)
권호 표지

이방압밀이 반복하중을 받은 과압밀점토의 비배수전단강도에 미치는 영향

Effects of Anisotropic Consolidation on the Postcyclic Undrained Shear Strength of an Overconsolidated Clay

  • 강병희 (인하대학교 공과대학 토목공학과) ;
  • 윤형석 (두산엔지니어링(주) 지반공학팀, 인하공업전문대학 토목공학과) ;
  • 박동진
  • 발행 : 1998.02.01
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초록

압밀응력비, 과압밀비 및 반복재하를 포함하는 압밀응력이력이 점성토의 비배수전단강도에 미치는 영향에 관해서 연구하였다. $(S_u/\sigma'_{vc})ckou/(S_U/\sigma_{vc})cuv$의 강도비는 과압밀비가 증가함에 따라 증가됨이 관찰되었다. Mayne(1980)이 과압밀점토의 비배수전단강도를 추정하기 위해 제안한 식(1)과 Yasuhara(1994)가 반복재하로 인해 발생된 간극수압이 소산된 후의 비 배수전단강도를 구하기 위해 제안한 식(4)는 Ko압밀상태에서도 비교적 잘 적용될 수 있음을 알 수 있었다. 또한 이들 두 식중의 원위치전단강도를 위한 한계상태간극수압정수 A.값은 조금 과압밀된 점토의 경우(OCR< 3) 표준압밀시험에 의해서 구할 것을 제안하였다.

The effects of consolidation stress history including consolidation stress ratio, OCR and cyclic loading with drainage on the undrained shear strength of cohesive soil were investig toted. The ratio$(S_u/\sigma'_{vc})ckou/(S_U/\sigma_{vc})cuv$ was observed to increase with increasing OCR. The equation (1) in this paper by Mayne(1980) for the undrained shear strength of the overconsolidated clay and the equation (4) by Yasuhara(1994), for the postcyclic shear strength were found to be relatively well applicable in the case of Kofonsolidated. It was also suggested that the value of the critical state pore pressure parameter As in these two equations for the in situ shear strength of lightly overconsolidated clay(OCR< 3) be obtained by the standard consolidating test.

키워드

참고문헌

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