Settlement of Raft Foundations
Publication: Journal of Geotechnical Engineering
Volume 109, Issue 11
Abstract
Recent multistory structures built in the City of Adelaide, South Australia, have frequently been founded on rafts. The authors have measured settlements on three such structures, and on two of the three sufficient exploration and test data were available to permit a review of techniques used for settlement prediction. For two of the projects conventional surveying techniques were used; for the third a borehole extensometer technique developed in the United Kingdom was the primary technique. The extensometer approach was found to be superior from a number of standpoints, including accessibility during construction, convenience of measurement and accuracy of results. An alternative method is proposed for settlement prediction and is demonstrated to be simple, versatile and to give results similar to those obtained from currently used methods that are either more restrictive or more time consuming in their application.
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References
1.
Ahlvin, R. G., and Ulery, H. H., “Tabulated Values for Determining the Complete Pattern of Stresses, Strains and Deflections Beneath a Uniform Load on a Homogeneous Half Space,” Highway Research Bulletin 352, 1962, pp. 1–13.
2.
Brown, P. T., “Numerical Analysis of Uniformly Loaded Circular Rafts on Deep Elastic Foundations,” Geotechnique, Vol. 19, No. 3, Sept., 1969, pp. 399–404.
3.
Burland, J. B., “Field Measurements—Some Examples of Their Influence on Foundation Design and Construction,” Ground Engineering, Vol. 10, No. 7, Oct., 1977, pp. 15–23.
4.
Burland, J. B., Moore, J. F. A., and Smith, P. D. K., “A Simple and Precise Borehole Extensometer,” Vol. 22, No. 1, 1972, pp. 174–177.
5.
Butler, F. G., “Heavily Overconsolidated Clays,” Proceedings, Conference on Settlement of Structures, British Geotechnical Society, Cambridge, England, 1974, pp. 531–713.
6.
Christian, J. T., and Carrier, W. D., “Janbu, Bjerrum and Kjaernsli's Chart Reinterpreted,” Canadian Geotechnical Journal, Vol. 15, 1978, pp. 123–128.
7.
Davis, E. H., and Poulos, H. G., “The Use of Elastic Theory for Settlement Prediction under Three Dimensional Conditions,” Geotechnique, Vol. 18, No. 1, 1968, pp. 67–91.
8.
Giroud, J. P., “Tassement D'une Couche de Sol Supportant une Fondation Rectangulaire Uniformément Chargée,” La Technique des Travaux, No. 331, Sept.–Oct., 1971, pp. 274–285.
9.
Giroud, J. P., “Tassement d'une Fondation Rectangulaire sur une Couche de Sol Compressible,” La Technique des Travaux, No. 338, Nov.–Dec., 1972, pp. 370–379.
10.
Kay, J. N., and Avalle, D. L. “Developments in Application of the Screw Plate to Stiff Clays,” Journal of the Geotechnical Division, ASCE, Vol. 108, No. GT1, Proc. Paper 16819, Jan., 1982, pp. 145–154.
11.
Kay, J. N., and Mitchell, P. W., “A Down Hole Plate Load Test for Insitu Properties of Stiff Clays,” Proceedings, Third Australia‐New Zealand Conference on Geomechanics, Vol. 1, Part 1, Wellington, New Zealand, 1980, pp. 255–259.
12.
Kay, J. N., and Parry, R. H. G., “Screw Plate Tests in a Stiff Clay,” Ground Engineering, Vol. 15, No. 6, Sept., 1982, pp. 22–29.
13.
Marsland, A., and Quarterman, R., “Further Development of Multipoint Magnetic Extensometers for Use in Highly Compressible Ground,” Geotechnique, Vol. 24, No. 3, 1974, pp. 429–433.
14.
“North East Transit Project, Preliminary Design—Adelaide Subway, Geotechnical Investigations,” Coffey & Partners Pty. Ltd., Report No. A500/1‐1 (unpublished), Oct., 1979.
15.
Poulos, H. G., “Stresses and Displacements in an Elastic Layer Underlain by a Rough Rigid Base,” Geotechnique, Vol. 17, 1967, pp. 378–410.
16.
Poulos, H. G., and Davis, E. H., Elastic Solutions for Soil and Rock Mechanics, John Wiley and Sons, Inc., New York, N.Y., 1974.
17.
Ronan, S. R., “Heavy Structures Founded in Aeolian Soils,” Proceedings, Third Australian‐New Zealand Conference on Geomechanics, Wellington, New Zealand, Vol. 1, 1980, pp. 39–44.
18.
Schmertmann, J. H., “Static Cone to Compute Static Settlement over Sand,” Journal of the Soil Mechanics and Foundations Division, ASCE, Vol. 96, No. SM3, May, 1970, pp. 1011–1046.
19.
Selby, S., and Lindsay, J. M., “Engineering Geology of the Adelaide City Area,” Bulletin 51, Department of Mines and Energy, Geological Survey of South Australia.
20.
Selvadurai, A. P. S., and Nicholas, T. J., “A Theoretical Assessment of the Screw Plate Test,” Proceedings, Third International Conference on Numerical Methods in Geomechanics, Aachen, W. Germany, Vol. 3, pp. 1245–1252.
21.
Skempton, A. W., and Bjerrum, L., “A Contribution to the Settlement Analysis of Foundations on Clay,” Geotechnique, Vol. 7, No. 4, 1957, pp. 168–178.
22.
Ueshita, K., and Meyerhof, G. G., “Surface Displacement of an Elastic Layer under Uniformly Distributed Loads,” Highway Research Record, No. 228, 1968, pp. 1–10.
23.
Wardle, L. J., and Fraser, R. A., “FOCALS—Foundation on Cross Anisotropic Layered System, Geomechanics Computer Program No. 4/1,” CSIRO, Division of Applied Geomechanics, Melbourne, Australia, 1975.
24.
Wilun, Z., and Starzewski, K., Soil Mechanics in Foundation Engineering, 2nd ed., Vol. 1, 1975, Surrey University Press, Surrey, England.
Information & Authors
Information
Published In
Journal of Geotechnical Engineering
Volume 109 • Issue 11 • November 1983
Pages: 1367 - 1382
Copyright
Copyright © 1983 ASCE.
History
Published online: Nov 1, 1983
Published in print: Nov 1983
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