Sequential Analysis of Ground Movements at Three Deep Excavation Sites with Mixed Ground Profiles
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 136, Issue 5
Abstract
Field measurements of settlement and lateral deformation obtained from three deep excavation sites constructed in mixed ground profiles are presented and analyzed. Settlement measurements were obtained throughout the construction process, categorized in three stages as: (1) preexcavation (i.e., preliminary site work and support wall installation); (2) main excavation and bracing/anchor installation; and (3) postexcavation (i.e., removal of bracing as basement construction proceeds). Maximum preexcavation stage settlements of to (where or trench depth) were measured at two sites, with the maximum settlements occurring adjacent to the wall during its installation. Maximum ground surface settlements during the main excavation stage ranged from about to (where excavation depth) and the distribution of ground settlement extended to a distance of to from the wall. Maximum settlements occurred at distances of about to from the wall at two sites where the wall consisted of concrete cast in situ (concrete diaphragm and concrete secant pile walls), creating a significant reverse curvature in the settlement distribution. The maximum postexcavation stage settlements ranged from to for the three sites, representing roughly 10 to 60% increases in settlement over the main excavation settlements, depending greatly on the specific support removal methods as well as the basement floor construction details employed at an individual site. Lateral deflections during the main excavation stage were consistent with trends reported in the literature, ranging from to , while lateral movement during postexcavation stage ranged from to . Finally, the settlements measured during the main and postexcavation stages are related to the support system stiffness.
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Acknowledgments
The writers are grateful to the Editorial Board Member and three anonymous reviewers for their extensive and constructive comments that considerably improved the manuscript.
References
Caspe, M. S. (1966). “Surface settlement adjacent to braced open cuts.” J. Soil Mech. Found. Div., 99(SM4), 51–59.
Clough, G. W., and O’Rourke, T. D. (1990). “Construction induced movements of in situ walls.” Proc., Design and Performance of Earth Retaining Structures, Geotechnical Special Publication, Vol. 25, ASCE, New York, 439–470.
Cording, E. J., and O’Rourke, T. D. (1977). “Excavation, ground movements and their influence on buildings.” Seminar Presented at ASCE Annual Convention.
Finno, R. J., and Calvello, M. (2005). “Supported excavations: Observational method and inverse modeling.” J. Geotech. Geoenviron. Eng., 131(7), 826–836.
Finno, R. J., and Harahap, I. S. (1991). “Finite-element analyses of HDR-4 excavation.” J. Geotech. Eng., 117(10), 1590–1609.
Golder, H. Q., Gould, J. P., Lambe, T. W., Tschebotarioff, G. P., and Wilson, S. D. (1970). “Predicted performance of braced excavation.” J. Soil Mech. Found. Div., 96(SM3), 801–814.
Hashash, Y. M. A., Jung, S., and Ghaboussi, J. (2004). “Numerical implementation of a neural network based material model in finite-element analysis.” Int. J. Numer. Methods Eng., 59(7), 989–1005.
Hashash, Y. M. A., Marulanda, C., Ghaboussi, J., and Jung, S. (2006). “Novel approach to integration of numerical modeling and field observations for deep excavations.” J. Geotech. Geoenviron. Eng., 132(8), 1019–1031.
Hashash, Y. M. A., and Whittle, A. J. (1996). “Ground movement prediction for deep excavations in soft clay.” J. Geotech. Engrg., 122(6), 474–486.
Kim, S., and Park, H. -D. (2003). “The relationship between physical and chemical weathering indices of granites around Seoul, Korea.” Bull. Eng. Geol. Environ., 62(3), 207–212.
Lambe, T. W., Wolfskill, L. A., and Jaworski, W. E. (1972). “The performance of a subway excavation.” Proc., Specialty Conf. on Performance of Earth and Earth-Supported Structures, 13–20.
Leung, E. H. Y., and Ng, C. W. W. (2007). “Wall and ground movements associated with deep excavations supported by cast in situ wall in mixed ground conditions.” J. Geotech. Geoenviron. Eng., 133(2), 129–143.
Long, M. (2001). “Database for retaining wall and ground movements due to deep excavations.” J. Geotech. Geoenviron. Eng., 127(3), 203–224.
Mana, A. I., and Clough, G. W. (1981). “Prediction of movements for braced cuts in clay.” J. Geotech. Engrg. Div., 107(6), 759–777.
O’Rourke, T. D. (1981). “Ground movements caused by braced excavations.” J. Geotech. Engrg. Div., 107(9), 1159–1178.
Osman, A. S., and Bolton, M. D. (2006). “Ground movement predictions for braced excavations in undrained clay.” J. Geotech. Geoenviron. Eng., 132(4), 465–477.
Peck, R. B. (1969). “Deep excavations and tunneling in soft ground—State-of-the-art report.” Proc., 7th Int. Conf. on Soil Mechanics and Foundation Engineering, Vol. 7, 225–290.
Terzaghi, K. (1943). Theoretical soil mechanics, Wiley, New York.
Terzaghi, K., and Peck, R. B. (1967). Soil mechanics in engineering practice, 2nd Ed., Wiley, New York.
Thorley, C. B. B., and Forth, R. A. (2002). “Settlement due to diaphragm wall construction in reclaimed land in Hong Kong.” J. Geotech. Geoenviron. Eng., 128(6), 473–478.
Whittle, A. J., Hashash, Y. M. A., and Whitman, R. V. (1993). “Analysis of deep excavation in Boston.” J. Geotech. Engrg., 119(1), 69–90.
Yoo, C. (2001). “Behavior of braced and anchored walls in soils overlying rock.” J. Geotech. Geoenviron. Eng., 127(3), 225–233.
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Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 136 • Issue 5 • May 2010
Pages: 656 - 668
Copyright
© 2010 ASCE.
History
Received: Jul 1, 2008
Accepted: Sep 25, 2009
Published online: Sep 30, 2009
Published in print: May 2010
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