Determining OCR in Clays from Laboratory Strength
Publication: Journal of Geotechnical Engineering
Volume 114, Issue 1
Abstract
The results of triaxial or simple shear tests may be used to estimate the in situ overconsolidation ratio of clays using a SHANSEP database. A compilation of OCRs and normalized strengths from 116 different clays is presented to discern separate trends for isotropic and anisotropic triaxial compression, extension, and direct simple shear conditions. The method may be used to provide an independent estimate of OCR in clays or supplement the results of consolidation testing. It is observed that natural clays and artificially prepared clays exhibit distinctly different relationships. An example application involving a sensitive sandy clay deposit is used to illustrate the procedure.
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References
1.
Azzouz, A., Baligh, M., and Ladd, C. C. (1982). “Cone penetration and engineering properties of Orinoco clay,” Proc. 3rd Int. Conf. on Behavior of Offshore Structs., 1, MIT, Hemisphere Publishing Co., Aug., 161–180.
2.
Azzouz, A., and Lutz, D. (1986). “Shaft behavior in plastic empire clays,” J. of Geotech. Engrg., ASCE, 112(4), 389–406.
3.
Bishop, A. W. (1972) “Shear strength parameters for undisturbed and remolded soils,” Proc. Stress‐Strain Behavior of Soils, Roscoe Memorial Symp., Foulis & Company, Mar., 3–139.
4.
Jamiolkowski, M. et al. (1982). “Undrained strength from CPT,” Proc. 2nd European Symp. on Penetration Testing, 2, Amsterdam, May, 599–606.
5.
Jamiolkowski, M. et al. (1985). “New developments in field and laboratory testing of soil,” Proc. 11th Int. Conf. on Soil Mechanics, 1, Aug., San Francisco, 57–154.
6.
Johnson, G. (1976). “Geology of Mulberry Island, Newport News, and Hampton,” Report No. 41, Virginia Division of Minerals, Aug., Charlottesville, VA, 51.
7.
Karlsrud, K., and Myrvoll, F. (1976). “Performance of a strutted excavation in quick clay,” Norwegian Geotech. Inst. Report No. 111, Oslo, 1–7.
8.
Kjekstad, O., and Lunne, T. (1979). “Soil parameters used for design of gravity platforms in the North Sea,” Norwegian Geotech. Inst., Report No. 127, Oslo, 1–18.
9.
Koutsoftas, D., Foott, R., and Handfelt, L. (1987). “Geotechnical investigation offshore Hong Kong.” J. of Geotech. Engrg., ASCE, 113(2), 87–105.
10.
Lacasse, S., Berre, T., and Lefebvre, G. (1985). “Block sampling of sensitive clays,” Proc. 11th Int. Conf. on Soil Mech., 2, San Francisco, Aug., 887–892.
11.
Ladd, C. C. et al. (1977). “Stress deformation and strength characteristics,” Proc. 9th Int. Conf. on Soil Mech., 2, Tokyo, July, 421–494.
12.
Lade, P., and Tsai, J. (1985). “Effects of localization in triaxial tests,” Proc. 11th Int. Conf. on Soil Mech., 2, Aug., San Francisco, 549–552.
13.
Larsson, R. (1977). “Basic behavior of Scandanavian clays,” Swedish Geotech. Inst. Report No. 4, Linkoping, June.
14.
Lunne, T., Christoffersen, H., and Jelta, T. (1985). “Engineering use of piezocone data,” Proc. 11th Int. Conf. on Soil Mech., 2, San Francisco, Calif., Aug., 907–912.
15.
Lunne, T., and St. John, H. (1979). “Use of cone penetrometer tests underneath North Sea platforms,” Norwegian Geotech. Inst. Report No. 128, Oslo, Norway, 1–6.
16.
Lunne, T., Myrvoll, F., and Kjekstad, O. (1981). “Observed settlements of five sea gravity platforms,” Proc. 13th Offshore Tech. Conf., IV, May, Houston, OTC 4146, 305–317.
17.
Mahar, L., and O'Neill, M. (1983). “Geotechnical characterization of desiccated clay,” J. of Geotech. Engrg., ASCE, 109(1), 56–71.
18.
Mayne, P. W., and Holtz, R. D. (1985). “Effect of principal stress rotation on clay strength,” Proc. 11th Int. Conf. on Soil Mech., 2, Aug., San Francisco, 579–582.
19.
Mayne, P. W. (1980). “Cam clay predictions of undrained strength,” J. of Geotech. Engrg., ASCE, 106(GT 11), 1219–1242.
20.
Mayne, P. W. (1985a). “Stress anisotropy effects on clay strength,” J. of Geotech. Engrg., ASCE, 111(3), 356–366.
21.
Mayne, P. W. (1985b). “A review of undrained strength in direct simple shear,” Soils and Foundations, 25(3), 64–72.
22.
Mayne, P. W. (1983). Discussion to “Anisotropy of undrained shear strength under axi‐symmetric loading,” Soils and Foundations, 23(4), 143–146.
23.
Mayne, P. W., et al. (1986). “Geotechnical report, Continuous Electron Beam Accelerator Facility, Newport News, VA.,” Law Engineering Report No. NK5‐1182 to DMJM, Washington, D.C., Dec.
24.
Ng, R., and Lo, K. Y. (1985). “The measurement of soil parameters relevant to tunneling in clay,” Canadian Geotech. J., 22(3), 375–391.
25.
Olsen, H., et al. (1986). “Piston core properties and disturbance effects,” J. of Geotech. Engrg., 112(6), 608–625.
26.
Ramalho‐Ortigao, J., et al. (1983). “Embankment failure on clay near Rio de Janeiro,” J. of Geotech. Engrg., ASCE, 109(11), 1460–1479.
27.
Sandbaekken, G., Berre, T., and Lacasse, S. (1986). “Oedometer testing at NGI,” Consolidation of Soils, Testing and Evaluation, ASTM STP 892, 329–353.
28.
Wroth, C. P. (1984). “Interpretation of in situ soil tests,” Geotechnique, 34(4), 449–489.
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Copyright © 1988 ASCE.
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Published online: Jan 1, 1988
Published in print: Jan 1988
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