Ground Movement Prediction for Deep Excavations in Soft Clay
Publication: Journal of Geotechnical Engineering
Volume 122, Issue 6
Abstract
This paper presents results of a series of numerical experiments, using nonlinear finite-element analyses, which investigate the effects of wall embedment depth, support conditions, and stress history profile on the undrained deformations around a braced diaphragm wall in a deep clay deposit. The analyses use a comprehensive effective stress soil model (MIT-E3) to describe important aspects of clay behavior, including small-strain nonlinearity and anisotropic stress-strain-strength, and focus on soil profiles with constant overconsolidation ratio, where the shear strength and stiffness are proportional to the depth. The results are combined in prototype “design” charts for estimating ground movements as functions of the excavation depth and support conditions, and incorporate the effects of wall length on base stability. Similar techniques are applied for a typical soil profile in Boston where a stiff overconsolidated crust overlies much softer clay. The results show the importance of the underlying clay on predicted wall deflections and ground movements.
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References
1.
Bjerrum, L., and Eide, O. (1956). “Stability of strutted excavations in clay.”Géotechnique, London, England, Vol. 6, 115–128.
2.
Christian, J. T., and Wong, I. H.(1973). “Errors in simulating excavation in elastic media by finite elements.”Soils and Found., 13(1), 1–10.
3.
Clough, G. W., and Hansen, L. A.(1981). “Clay anisotropy and braced wall behavior.”J. Geotech. Engrg., ASCE, 107(7), 893–913.
4.
Clough, G. W., and O'Rourke, T. D. (1990). “Construction induced movements of insitu walls.”Design and performance of earth retaining structures, Geotech. Spec. Publ. No. 25, ASCE, New York, N.Y., 439–470.
5.
Clough, G. W., Weber, P. R., and Lamont, J. (1972). “Design and observation of a tied-back wall.”Proc., ASCE Spec. Conf. on Perf. of Earth and Earth-Supported Struct., ASCE, New York, N.Y., Vol. 1, 1367–1390.
6.
Clough, G. W., Smith, E. M., and Sweeney, B. P. (1989). “Movement control of excavation support systems by iterative design.”Proc., ASCE Found. Engrg. Congr., ASCE, New York, N.Y., Vol. 1, 869–884.
7.
Davis, E. H., and Booker, J. R.(1973). “The effect of increasing strength with depth on the bearing capacity of clays.”Géotechnique, London, England, 23(4), 551–563.
8.
Finno, R. J., and Harahap, I. S.(1991). “Finite element analysis of HDR-4 excavation.”J. Geotech. Engrg., ASCE, 117(10), 1590–1609.
9.
Finno, R. J., Harahap, I. S., and Sabatini, P. J. (1991). “Analysis of braced excavations with coupled finite element formulations.”Comp. and Geotechnics, Vol. 12, 91–114.
10.
Goto, S., and Iguro, M. (1989). “The world's first high strength, super deep slurry wall.”Proc., 12th Int. Conf. on Soil Mech. and Found. Engrg., Vol. 2, 1487–1490.
11.
Haley and Aldrich Inc. (1993). “Special laboratory and in situ testing program: Central Artery (I-93)/Tunnel (I-90) project, Boston, Massachusetts.”Rep. Prepared for Massachusetts Hwy. Dept., Boston, Mass.
12.
Hashash, Y. M. A. (1992). “Analysis of deep excavations in clay,” PhD thesis, Dept. of Civ. Engrg., Massachusetts Inst. of Technol. (MIT), Cambridge, Mass.
13.
Hashash, Y. M. A., and Whittle, A. J. (1992). “Analysis of braced diaphragm walls in deep deposits of clay.”Res. Rep. R92-19, Dept. of Civ. Engrg., Massachusetts Inst. of Technol. (MIT), Cambridge, Mass.
14.
Jardine, R. J., Potts, D. M., Fourie, A. B., and Burland, J. B.(1986). “Studies of the influence of non-linear stress-strain characteristics in soil-structure interaction.”Géotechnique, London, England, 36(3), 377–396.
15.
Mana, A. I., and Clough, G. W.(1981). “Prediction of movements for braced cuts in clay.”J. Geotech. Engrg., ASCE, 107(6), 759–777.
16.
O'Rourke, T. D. (1989). “Predicting displacements of lateral support systems.”Design, construction, and performance of deep excavations in urban areas, Boston Soc. of Civ. Engrs. (BSCE), Cambridge, Mass. 35p.
17.
O'Rourke, T. D. (1992). “Base stability and ground movement prediction for excavations in soft clay.”Proc., ICE Conf. on Retaining Struct., Thomas Telford Ltd., London, England, 657–687.
18.
Peck, R. B. (1969). “Deep excavations and tunneling in soft ground.”Proc., 7th Int. Conf. on Soil Mech. and Found. Engrg., 225–290.
19.
Steel sheet piling design manual. (1975). United States Steel.
20.
Terzaghi, C. (1943). Theoretical soil mechanics. John Wiley & Sons, Inc., New York, N.Y.
21.
Whittle, A. J., and Hashash, Y. M. A. (1994). “Soil modeling and prediction of deep excavation behavior.”Proc., Int. Symp. on Pre-Failure Deformation Characteristics of Geo-Mat. ( IS-Hokkaido '94), A. A. Balkema, Vol. 1, 589–595.
22.
Whittle, A. J., and Kavvadas, M. J.(1994). “Formulation of the MIT-E3 constitutive model for overconsolidated clays.”J. Geotech. Engrg., ASCE, 120(1), 173–198.
23.
Whittle, A. J., Hashash, Y. M. A., and Whitman, R. V.(1993). “Analysis of a deep excavation in Boston.”J. Geotech. Engrg., ASCE, 119(1), 69–90.
24.
Whittle, A. J., DeGroot, D. J., Ladd, C. C., and Seah, T.-H.(1994). “Model prediction of the anisotropic behavior of Boston Blue clay.”J. Geotech. Engrg., ASCE, 120(1), 199–224.
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Copyright © 1996 American Society of Civil Engineers.
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Published online: Jun 1, 1996
Published in print: Jun 1996
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