한국지반공학회논문집 (Journal of the Korean Geotechnical Society)

  • 제27권8호
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  • Pages.31-37
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  • 2011
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  • 1229-2427(pISSN)
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  • 2288-646X(eISSN)
한국지반공학회 (Korean Geotechnical Society)
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다짐된 불포화 실트질 모래의 흡수응력과 일축압축강도

Suction Stress and Unconfined Compressive Strength of Compacted Unsaturated Silty Sand

  • 박성완 (단국대학교 토목환경공학과) ;
  • 권홍기 (단국대학교 토목환경공학과)
  • Park, Seong-Wan (Dept. of Civil and Environmental Engineering, Dankook Univ.) ;
  • Kwon, Hong-Ki (Dept. of Civil and Environmental Engineering, Dankook Univ.)
  • 투고 : 2011.01.17
  • 심사 : 2011.08.05
  • 발행 : 2011.08.31
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초록

본 연구에서는 정적 다짐된 자연 성해 실트질 모래의 불포화 흡수력의 영향과 변형특성을 평가하기 위해서 불포화 일축압축시험을 수행하였다. 공시체는 초기포화도를 다르게 하여 제작되었고 공시체의 초기 흡수력 및 최대일축압축강도에서의 흡수력 그리고 전단시의 체적변형이 측정되었다. 시험결과, 초기포화도의 크기에 따라 흡수력, 최대 일축 압축강도 및 체적변형 거동을 살펴보고 평가할 수 있었다. 또한, 불포화상태 실트질 모래의 전단강도에서 흡수력에 의해 증가하는 겉보기 점착력을 나타내는 흡수응력($P_s$을 추정하였다.

In order to evaluate the effect of matric suction on the strength and deformation characteristics, the unsaturated unconfined compression test is performed for the statical1y compacted silty sand. Specimens used were made under conditions with various initial degrees of saturation. The initial matric suction, matric suction at the peak shear strength and the volumetric deformation during the shear process were measured. From these results, it was found that the initial degree of saturation exerts the influence on the behaviors of suction, peak shear strength and the volumetric deformation. Furthermore, the suction stress($P_s$) which means the apparent cohesion due to matric suction in the unsaturated shear strength could be derived.

키워드

과제정보

연구 과제 주관 기관 : 한국연구재단

참고문헌

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피인용 문헌

  1. 편마풍화토의 다짐밀도에 따른 불포화 흡수응력 특성 vol.29, pp.8, 2013, https://doi.org/10.7843/kgs.2013.29.8.15
  2. Undrained Shear Strength of Unsaturated Soils under Zero or Low Confining Pressures in the Vadose Zone vol.17, pp.1, 2011, https://doi.org/10.2136/vzj2018.01.0024