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교란효과를 고려한 샌드 드레인의 약식설계
Simple Design of Sand Drains Considering Smear Effect

유영삼    (정회원, 서울대학교 토목공학과 석사졸업   ); 정충기    (정회원, 서울대학교 토목공학과 조교수, 정회원, 서울대학교 토목공학과 박사졸업, 정회원, 서울대학교 토목공학과  );
  • 초록

    The effects of smear and well resistance should be taken into account for the design of sand drains. Practically, simple design, which employs the method using 112 reduced diameter of drains or assuming the coefficient of consolidation in horizontal direction equals to that in vertical direction, based on the theory neglecting these effects, has been used. In this study, the reliability of existing simple design methods as well as the influences of smear and well resistance was investigated with the equations proposed by Hansbo and Onoue. It is shown that the consolidation time is chiefly governed by the effect of smear for drains with highly permeable sands. For general soil condition and placing type of sand drain, consolidation time is underestimated for simple design wi어. 1/2 reduced diameter of drains, and it is overestimated for that with the assumption that the coefficient of consolidation in horizontal direction equals to that in vertical direction. Through the investigations on different reduced diameter, it was shown that simple design with 1/4 reduced diameter of drains yielded the reliable results with errors less than 6%.


  • 참고문헌 (6)

    1. Consolidation by Vertical Drains Taking Well Resistance and Smear into Consideration , Onoue,A. , Soils and Foundations / v.28,pp.165-174,
    2. Consolidation of Clay by band-shaped prefabricated drains , Hansbo,S. , Ground Engineering / v.12,pp.59-66,
    3. Consolidation of Fine-Grained Soils by Drain wells , Barron,R.A. , Transactions, American Society of Civil Engineers, Paper No.2346 / v.113,pp.718-754,
    4. Consolidation of Fine-Grained Soils by Prefabricated Drains , Hansbo,S. , Proceedings of the 10th International Conference on Soil Mechanics and Foundation Engineering / v.3,pp.677-682,
    5. Leonard,G.A. , Foundation Engineering / v.,pp.171-176,
    6. Consolidation of Soils by Vertical Drain Wells with Finite Permeability , Yoshikuni,H.;Nakanodo,H. , Soils and Foundations / v.14,pp.35-46,
  • 이 논문을 인용한 문헌 (1)

    1. 2000. "Design of Vertical Drain in Consideration of Smear Effect and Well Resistance" 한국농공학회지 = Journal of the Korean Society of Agricultural Engineers, 42(4): 115~123     

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