A New Analysis Method of the Consolidation Test Data for an Undisturbed Clay

불교란 점토 압밀시험 결과의 새로운 해석법

  • Published : 2002.11.01

Abstract

In this study, the results of a series of consolidation test for undisturbed Ariake clay in Japan were analyzed by three methods, e-log p (e: void ratio, p: consolidation pressure), log e-log p and n-log p (n: porosity). Moreover, the characteristics of each analysis method were studied. For undisturbed Ariake clay, the log o-Log p and the n-log p relationships can be found as two groups of straight lines of different gradients, but both the elastic consolidation and plastic consolidation regions of e-log p relationship are expressed as a curve. In this paper, the porosity of consolidation yield n$\_$y/, consolidation yield stress p$\_$y/, and the gradient of the plastic consolidation region C$\_$p/ were represented by the log e-log p method, and n$\_$c/, P$\_$cn/ and C$\_$cn/ were represented by the n-log p method. The meaning and the relationships of each value were studied, and the interrelationships among compression indices i.e. C$\_$cn/, C$\_$p/ and C$\_$c/ are obtained from each analysis method as a function of initial porosity n$\_$0/.

Keywords

References

  1. Butterfield, R. 1979. A Natural Compression Law for Soils (An Advance on e-Iog p'). Geotechnique. 29 (4): 469-480. (in English)
  2. Fujikawa, T., T. Koumoto and K. Kaku. 1980. On the Linearity in the Log e vs. Log p Relationship from Consolidation Tests and its Application. Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering. 87: 31-36. (in Japanese)
  3. Fujikawa, T and M. Takayama. 1980. Physical Properties of Ariake Marine Clay -Geotechnical properties of Ariake marine clay (1) -. Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering. 88: 51-61. (in Japanese)
  4. Japanese Geotechnical Society. 1990. Method and Explanation of Soil Testing. 188
  5. Koumoto, T. and J. H. Park. 1998. Compression Index Equation for Remolded Clays. Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering. 193: 81-85. (in Japanese)
  6. Koumoto, T. and J. H. Park. 2001. Interrelationship Among Three Arrangement Methods of e-log p, log e-log p and n-log p for Remolded Clays. Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering. 211: 43-49. (in Japanese)
  7. Matsuo, K. 1986. Relationship between Properties and Compression Index Arranged by Logarithmic Strain. Soils and Foundations, JSSMFE. 26(4): 177-185. (in Japanese)
  8. Matsuo, M. 1974. Soil Test. Morikita Shuppan Co., Ltd: 86. (in Japanese)
  9. Mikasa, M. 1964. Arrangement Method of Consolidation Test. Proceedings of the 19th Annual Conference of the Japan Society of Civil Engineers. III: 7(1)-7(2). (in Japanese)
  10. Oikawa, H. 1986. Compression Curve of Soft Soils. Soils and Foundations, JSSMFE 27(3): 99-104. (in English)
  11. Park, J. Hand T. Koumoto. 2000. Compression Characteristics of Remolded Clays. Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering. 205: 13-17. (in Japanese)
  12. Park, J. Hand T. Koumoto. 2000. The Ultimate Settlement Equation Using Initial Porosity, no. Proceedings of the 81st Annual Conference of the Japanese Society of Irrigation Drainage and Reclamation Engineering, Kyushu Branch: 239-242. (in Japanese)