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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.65 No.1
- 발행연도
- 2018.1
- 수록면
- 81 - 89 (9page)
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초록· 키워드
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Stone column installation is a convenient method for improvement of soft ground. In very soft clays, in order to increase the lateral confinement of the stone columns, encasing the columns with high stiffness and creep resistant geosynthetics has proved to be a successful solution. This paper presents the results of three dimensional finite element analyses for evaluating improvement in behaviour of ordinary stone columns (OSCs) installed in soft clay by geotextile encasement under monotonic and cyclic loading by a comprehensive parametric study. The parameters include length and stiffness of encasement, types of stone columns (floating and end bearing), frictional angle and elastic modulus of stone column’s material and diameter of stone columns. The results indicate that increasing the stiffness of encasement clearly enhances cyclic behaviour of geotextile encased stone columns (GESCs) in terms of reduction in residual settlement. Performance of GESCs is less sensitive to internal friction angle and elasticity modulus of column’s materials in comparison with OSCs. Also, encasing at the top portion of stone column up to triple the diameter of column is found to be adequate in improving its residual settlement and at all loading cycles, end bearing columns provide much higher resistance than floating columns.
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참고문헌 (46)
참고문헌 신청
Aboshi, H. / 1979 / The composer a method to improve the characteristics of soft clays by inclusion of large diameter sand columns / International Conference on Soil Reinforcement
Alexiew, D. / 2005 / Geotextile Encased Columns (GEC): Load Capacity, Geotextile Selection and Pre-Design Graphs / Geo-Frontiers 2005 Congress
Ambily, A.P. / 2004 / Experimental and theoretical evaluation of stone column in soft clay / International Conference on Geosynthetics and Geoenvironmental Engineering
Ambily, A.P. / 2007 / Behaviour of stone columns based on experimental and FEM analysis / J. Geotech. Geoenviron. Eng. 133(4):405~415
Ardakani, A. / 2014 / Numerical modeling of soil nail walls considering Mohr Coulomb, hardening soil and hardening soil with small-strain stiffness effect models / Geomech. Eng. 6(4):391~401
Alexiew, D. / 2005 / Geotextile Encased Columns (GEC): Load Capacity, Geotextile Selection and Pre-Design Graphs / Geo-Frontiers 2005 Congress
Ambily, A.P. / 2004 / Experimental and theoretical evaluation of stone column in soft clay / International Conference on Geosynthetics and Geoenvironmental Engineering
Ambily, A.P. / 2007 / Behaviour of stone columns based on experimental and FEM analysis / J. Geotech. Geoenviron. Eng. 133(4):405~415
Ardakani, A. / 2014 / Numerical modeling of soil nail walls considering Mohr Coulomb, hardening soil and hardening soil with small-strain stiffness effect models / Geomech. Eng. 6(4):391~401
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