Settlement of Soft Clay by Inflection Point Method for With and Without PVD

Authors

  • กนกอร กันณรงค์
  • วีรยา ฉิมอ้อย

Keywords:

Embankment,, Settlement of Soft Soil,, Prefabricated Vertical Drained,, rate of settlement

Abstract

This paper presents the comparison of rate of settlement of soft clay by inflection point method both with and without prefabricated vertical drain (PVD) improvement, comparing with Terzaghi theory in the case of without PVD improvement and  comparing with Barron method in the case of with PVD improvement. The case study of runway of the second Bangkok International Airport that have PVD improvement are used. From the results, it is found that the coefficients of consolidation by inflection method were higher than square root time method. This causes the rate of settlement by inflection point method was faster than Terzaghi method in the case of without PVD improvement. But in the case of with PVD method, the rate of settlement by inflection point method was slower than that of Barron method. When compare with the settlement of the case history, it is found that the rate of settlement by Barron was closed to the field settlement. 

References

[1] A.K. Sinha, G. Havanagi, and S. Mathur,“Inflection point method for predicting settlement of PVD improved soft clay under embankments,Geotextiles and Geomembranes, Vol.25, pp.336- 345, April, 2007.
[2] C.J. Leo, “Equal consolidation by vertical drains.,” J. Geotech. Geoenviron Eng., Vol.131, No.10, pp.1317-1317, October, 2005.
[3] F.R. Cour, “Inflection Point Method for Computing Cv,” Journal of the Soil Mechanics. Foundation Div, ASCE, Vol.97, No.5, pp. 827-831, August, 1971.
[4] R.G. Robinson,“Consolidation analysis by inflection point method,” J. Geotech. Geoenviron Eng, Vol.47, No.1, pp.199-200, February, 1997.
[5] K. Terzaghi, “Theoretical soil mechanics,” John Wiley and Sons, Inc., New York, 1943
[6] R.A. Barron, “Consolidation of Fine-grained Soils by Drain Wells,” Transactions of ASCE, Vol.113, pp.718-754, January, 1948.
[7] D.T. Bergado, J.C. Chai, M.C. Alfaro and A.S. Balasubramaniam, “Improvement Techniques of Soft Ground in Subsideind and Lowland Environment,” AIT, 1992.

Downloads

Published

2020-06-17

How to Cite

[1]
กันณรงค์ ก. . . and ฉิมอ้อย ว. ., “Settlement of Soft Clay by Inflection Point Method for With and Without PVD ”, Eng. & Technol. Horiz., vol. 32, no. 4, pp. 67–72, Jun. 2020.

Issue

Vol. 32 No. 4 (2015): October - December

Section

Research Articles

License

The published articles are copyrighted by the School of Engineering, King Mongkut's Institute of Technology Ladkrabang.

The statements contained in each article in this academic journal are the personal opinions of each author and are not related to King Mongkut's Institute of Technology Ladkrabang and other faculty members in the institute.
Responsibility for all elements of each article belongs to each author; If there are any mistakes, each author is solely responsible for his own articles.