discharge capacity of prefabricated vertical drains confined in clay

MIURA AND CHAI D Discharge Capacity of Prefabricated Vertical Drains Confined in Clay
4. For practical purposes, it is suggested that, regarding the long-term discharge capacity,
a PVD with a larger drainage area per channel (approximately 3 mm 2 ) and a larger
drainage channel shape factor (greater than 0.40 mm) should be selected.
ACKNOWLEDGMENTS
This research was partly supported by Kinjo Rubber Co., Ltd., Osaka, Japan. The
authors would like to express their appreciation to N. Nomura, Director of the Technical
Department of Kinjo Rubber Co., Ltd., for his helpful suggestions and comments.
Thanks are also extended to K. Toyota and H. Yamasaki, graduates of Saga University,
Japan, for conducting some of the laboratory tests and assisting in figure preparation.
REFERENCES
ASTM D 4751, “Standard Test Method for Determining Apparent Opening Size of a
Geotextile”, American Society for Testing and Materials, West Conshohocken, Pennsylvania,
USA.
Chai, J.C. and Miura, N., 1999, “Investigation of Factors Affecting Vertical Drain Behavior”,
Journal of Geotechnical and Geoenvironmental Engineering, Vol. 125, No.
3, pp. 216-226.
Chai, J.C., Miura, N., Sakajo, S. and Bergado, D.T., 1995, “Behavior of Vertical Drain
Improved Subsoil Under Embankment Loading”, Soils and Foundations, Vol. 35,
No. 4, pp. 49-61.
Giroud, J.P., 1996, “Granular Filters and Geotextile Filters”, Geofilters ’96: comptes
rendus, Lafleur, J. and Rollin, A., Editors, École Polytechnique, Proceedings of the
conference Geofilters’96 held in Montreal, Quebec, Canada, May 1996, pp. 565-680.
Hansbo, S., 1981, “Consolidation of Fine-Grained Soils by Prefabricated Drains”, Proceedings
of the Tenth International Conference on Soil Mechanics and Foundation
Engineering, Balkema, Vol. 3, Stockholm, Sweden, June 1981, pp. 677-682.
Miura, N., Chai, J.C. and Toyota, K, 1998, “Investigation on Some Factors Affecting
Discharge Capacity of Prefabricated Vertical Drain”, Proceedings of the Sixth International
Conference on Geosynthetics, IFAI, Vol. 2, Atlanta, Georgia, USA, April
1998, pp. 845-850.
Miura, N., Park, Y.M. and Madhav, M.R., 1993, “Fundamental Study on the Discharge
Capacity of Plastic Board Drain”, Journal of Geotechnical Engineering,JSCE,Vol.
35, No. 3, pp. 31-40. (in Japanese)
134 GEOSYNTHETICS INTERNATIONAL S 2000, VOL. 7, NO. 2