A Practical App개ach of Stress Path Method for Rational Settlement Estimation of Saturated Clay Deposit : Part I (Evaluation and Use of Characteristic Deformation Behaviors)

포화 점성토지반 침하량의 합리적 평가를 위한 실용적인 응력경로법 적용방법 : Part I (특성변형거동의 평가와 활용)

  • Kim Chang-Youb (Costal Engrg. and Harbour Research Division, Korean Ocean Research and Development Institute) ;
  • Chung Choong-Ki (School of Civil, Urban & Geosystem Engrg., Seoul National Univ.)
  • 김창엽 (한국해양연구원 연안항만공학연구본부) ;
  • 정충기 (서울대학교 지구환경시스템공학부)
  • Published : 2005.06.01

Abstract

In this paper, a conceptual approach of the stress path method was newly proposed for a rational estimation of settlements of saturated clay deposits. In the proposed approach, settlement-related characteristic deformation behaviors of a specific clay deposit, which can cover all probable stress changes expected in the field, are experimentally evaluated in advance. Then settlements of various structures constructed on the deposit are easily estimated with only the characteristic deformation behaviors and without any additional experimental effort. In Part I of this paper, in order to provide practicality to the new conceptual approach, we developed a detailed procedure which is capable of evaluating characteristic deformation behaviors of a saturated clay deposit with only a limited number of tests and easily predicting deformations under a given stress change using the characteristic deformation behaviors. The applicability of the developed procedure was clearly shown by presenting an actual application example.

본 연구에서는 포화 점성토지반 침하량의 합리적인 평가를 위한 새로운 개념의 응력경로법 적용방법을 제안하였다. 제안된 적용방법은 특정 점성토지반에 대해 구조물 침하와 관련하여 현장에서 나타날 수 있는 모든 응력변화 조건을 포괄하는 특성변형거동을 실험적으로 선행하여 평가한 다음, 이를 이용하여 일체의 추가적인 시험없이 발생가능한 다양한 현장조건에 대해 손쉽게 침하량을 평가하는 방법이다. 본 연구의 Part I에서는 이러한 새로운 침하량 평가개념의 실용화와 관련하여 포화 점성토지반의 침하관련 특성변형거동을 최소한의 시험만으로 효율적으로 평가하고 이를 바탕으로 임의의 응력변화 조건에 대해 손쉽게 변형거동을 예측하는 구체적인 방법을 개발하였으며, 그 적용성을 실제 사례를 통해 명확히 확인하였다.

Keywords

References

  1. 권오엽 (1988), '정규압밀 점성토의 응력경로에 따른 응력-변형거동', 박사학위논문, 서울대학교
  2. Burland, J. B. and Georgiannou, V. N. (1991), 'Small strain stiffuess under generalized stress changes', Proc. 10th Eur. Conf. Soil Mech., Florence, Vol.1, pp.41-45
  3. Henkel, D. J. (1960), 'The Shear Strength of Saturated Remolded Clays', Proc. ASCE Spec. Conf. on Shear Strength of Cohesive Soils, Boulder, pp.553-554
  4. Gangopadhyay, C. R., Das, S. C. and Som, N. (1980), 'Stress Path Influence on Drained deformations of clay', Journal of the Geotechnical Engineering Division, ASCE, Vol.106, No.GT11, pp. 1243-1260
  5. Ladd, C. C. and Foott, R. (1974), 'New Design Procedures for Stability of Soft Clays', Journal of the Geotechnical Engineering Division, ASCE, Vol.100, No.GT7, pp.763-786
  6. Lambe, T. W. (1963), 'An Earth Dam for Storage of Fuel Oil', Proceedings of 2nd Pan American conference on Soil Mechanics and Foundation Engineering, Vol.1, p.257
  7. Lambe, T. W. (1964), 'Method of Estimating Settlement', Journal of the Soil Mechanics and Foundation Division, ASCE, Vol.90, No.SM5, pp.43-67
  8. Lambe, T. W. (1967), 'The Stress-Path Method', Journal of the Soil Mechanics and Foundation Division, ASCE, Vol.93, No.GT6, pp.309-331
  9. Lambe, T. W. and Marr, W. A. (1979), 'Stress-Path Method: Second Edition', Journal of the Geotechnical Engineering Division, ASCE, Vol.105, No.SM6, pp.727-738
  10. Lambe, T. W. and Whitman, R. V. (1986), Soil mechanics, SI version, John Wiley & Sons
  11. Parry, R. G. H. (1960), 'Triaxial Compression and Extension Tests on Remolded Saturated clay', Geotechnique, Vol.10, No.3, pp.451-457
  12. Simons, N. E. and Som, N. (1969), 'The Influence of Lateral Stresses on the Stress-Deformation Characteristics of London Clay', Proceedings of the 7th International Conference on Soil Mechanics and Foundation Engineering, Vol.1, pp.369-377
  13. Skempton, A. W. (1954), 'The Pore Pressure Coefficient A and B', Geotechnique, Vol.4, pp.143-147 https://doi.org/10.1680/geot.1954.4.4.143
  14. Yimsiri, S. and Soga, K. (2002), 'Application of Micromechanics Model to Study Anisotropy of Soils at Small Strains', Soils and Foundations, Vol.42, No.5, pp.15-26