Inverse Analysis of Geotechnical Parameters on Improved Soft Bangkok Clay
Publication: Journal of Geotechnical Engineering
Volume 118, Issue 7
Abstract
Deformation, strength, and flow parameters were determined by inverse analyses on geotechnical data obtained from two full‐scale test embankments constructed on improved soft Bangkok clay. One site was improved with prefabricated vertical drains (PVD), and an adjacent site was improved with compacted granular piles (CGP). In the PVD site, the ratio of (field) to (lab) ranged from 1.5‐4, and the value was The value of was about 10, with of 2.5. In the CGP site, the ratio of (field) to (lab) ranged from 1.3—12. The smeared zone was considered by reduction to CGP diameter by one‐fifth. The ratio of to was determined to be 150. The observed final settlements in the CGP site was 30‐35% lower than those in the PVD site. Using back‐analyzed soil parameters, the settlements of the test embankments were predicted well. Both ground improvement schemes are effective in improving the soft Bangkok clay.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Aboshi, H., Ichimoto, E., Enoki, M., and Harada, K. (1979). “The compozer—A method to improve characteristics of soft clays by inclusion of large diameter sand columns.” Proc. 1st Int. Conf. on Soil Reinforcement, Paris, 1, 211–216.
2.
Asaoka, A. (1978). “Observational procedure for settlement prediction.” Soils Found., 18(4), 87–101.
3.
Balaam, N. P., Poulos, H. G., and Brown, P. T. (1977). “Settlement analysis of soft clays reinforced with granular piles.” Proc. 5th Southwest Asian Conf. on Soil Engrg., Southeast Asian Geotechnical Society, Bangkok, Thailand, 81–92.
4.
Barksdale, R. D., and Bachus, R. C. (1983). “Design and construction of stone columns.” Report No. FHWA/RD‐83/026, Nat. Tech. Info. Service, Springfield, Va.
5.
Barron, R. A. (1948). “Consolidation of fine‐grained soils by drain wells.” Trans. ASCE, 124, 709–739.
6.
Bergado, D. T., and Khaleque, M. A. (1986). “Correlation of LLT pressuremeter, vane, and Dutch cone tests in Bangkok marine clay, Thailand.” The Pressuremeter and Its Marine Applications: Second Int. Symp., J. L. Briand and J. M. E. Audibert, eds., STP 950, ASTM, Philadelphia, Pa., 339–353.
7.
Bergado, D. T., Miura, N., Singh, N., and Panichayatum, B. (1988a). “Improvement of soft Bangkok clay using vertical band drains based on full scale test.” Proc. Int. Conf. on Engrg. Problems of Regional Soils, Pergamon Press, Beijing, China, 379–384.
8.
Bergado, D. T., Miura, N., Panichayatum, B., and Sampaco, C. L. (1988b). “Reinforcement of soft Bangkok clay using granular piles.” Proc. Int. Geotech. Symp. on Theory and Practice of Earth Reinforcement, Balkema, Rotterdam, The Netherlands, 179–184.
9.
Bergado, D. T., Ahmed, S., Sampaco, C. L., and Balasubramaniam, A. S. (1990). “Settlement of Bangna‐Bangpakong highway on soft Bangkok clay.” J. Geotech. Engrg., ASCE, 116(1), 136–155.
10.
Bjerrum, L. (1972). “Embankments on soft ground.” Proc. Spec. Conf. on performance of Earth and Earth‐supported Structures, ASCE, New York, N.Y., 2, 1–54.
11.
Carillo, N. (1942). “Simple two‐ and three‐dimensional cases in the theory of consolidation of soils.” J. Math. Phys., 21(1), 1–5.
12.
Christian, J. T., and Carrier, W. D. III., (1978). “Janbu, Bjerrum and Kjaernsli's chart reinterpreted.” Can. Geotech. J., 15, 123–128.
13.
Hansbo, S. (1979). “Consolidation of clay by band shaped prefabricated drains.” Ground Engrg., 12(5), 16–25.
14.
Hansbo, S. (1987). “Design aspects of vertical drains and lime column installations.” Proc.9th Southeast Asian Geotech. Conf., Southeast Asian Geotechnical Society, Bangkok Thailand, 2, 8–1 to 8–12.
15.
Juran, I., and Guermazi, A. (1988). “Settlement response of soft soils reinforced by compacted sand columns.” J. Geotech. Engrg., ASCE, 114(8), 930–943.
16.
Laminen, K., and Rathmeyer, H. (1983). “Experience on horizontal oedometer test to determine the parameter .” Proc. 8th European Conf. on Soil Mech. and Found. Engrg., Balkema, Rotterdam, The Netherlands, 2, 647–651.
17.
Magnan, J. P., and Deroy, J. M. (1980). “Analyse graphic des courbes de consolidation oedometrique.” Bull. Liason Lab. Ponts et Chaussees, 9, 53–56.
18.
Mesri, G., and Castro, A. (1987). ““ concept and during secondary compression.” J. Geotech. Engrg., ASCE113(2), 230–247.
19.
Newmark, N. (1942). “Influence charts for computations of stresses in elastic foundations.” Bull. No. 338, Univ. of Illinois, Urbana, 111.
20.
Olson, R. E. (1977). “Consolidation under time‐dependent loading.” J. Geotech. Engrg. Div., ASCE, 103, 55–61.
21.
Poulos, H. G., and Davis, E. H. (1974). “Elastic solutions for soil and rock mechanics.” John Wiley & Sons, Inc., New York, N.Y.
22.
Rixner, J. J., Kraemer, S. R., and Smith, A. D. (1986). “Prefabricated vertical drains, Vol. 1: Engineering guidelines.” Report No. FHWA/RD‐86/168, Nat. Tech. Info. Service, Springfield, Va.
23.
Skempton, A. W., and Bjerrum, L. (1957). “A contribution to the settlement analysis of foundations on clay.” Geotechnique, 7, 168–178.
Information & Authors
Information
Published In
Copyright
Copyright © 1992 ASCE.
History
Published online: Jul 1, 1992
Published in print: Jul 1992
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.