Effect of Fines on Behavior of Braced Excavation in Sand: Experimental and Numerical Study
Publication: International Journal of Geomechanics
Volume 16, Issue 1
Abstract
In this paper, the effect of fine content in the retained sandy soil on the behavior of braced excavation has been studied using experimental and numerical models in terms of four design factors: strut force, bending moment developed in the wall, lateral deflection of the wall, and vertical displacement of the ground surface. In the experiments, the fine content of the soil has been estimated as 0, 5, and 10% (by weight). However, the numerical study has been conducted for different fine contents varying from 0 to 50% (by weight). The parametric study with 20 m depth of retaining wall; position of struts at 2, 7, 12, and 17 m below ground level; wall thickness and embedment depth as 6 and 80% of depth of excavation; and stiffness of support members as confirms that the values of the four design factors (strut force, wall moment, lateral wall defection, ground deflection, and net earth pressure acting on the wall) increase with the increase in fine content in the retained soil. It is also observed that predominant ground surface displacement gradually shifts from heaving to settlement as the fine content in the retained soil increases.
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Acknowledgments
The financial support for the present work received from the Science and Engineering Research Board (SERB) of the Department of Science and Technology, Government of India, New Delhi is hereby gratefully acknowledged.
References
Bose, S. K., and Som, N. N. (1998). “Parametric study of a braced cut by finite element method.” Comput. Geotech., 22(2), 91–107.
Bryson, L. S., and Zapata-Medina, D. G. (2007). “Physical modelling of supported excavations.” Advances in Measurement and Modeling of Soil Behavior, Geotechnical special publication 117, D. J. DeGroot, C. Vipulanandan, J. A. Yamamuro, V. N. Kaliakin, P. V. Lade, M. Zeghal, U. El Shamy, N. Lu, and C. R. Song, eds., ASCE, Reston, VA, 1–9.
Chowdhury, S. S., Deb, K., and Sengupta, A. (2013). “Estimation of design parameters for braced excavation: A numerical study.” Int. J. Geomech., 234–247.
Clough, G. W., and Hansen, L. A. (1981). “Clay anisotropy and braced wall behavior.” J. Geotech. Engrg. Div., 107(7), 893–913.
Costa, P. A., Borges, J. L., Fernandes, M. M. (2007). “Analysis of a braced excavation in soft soils considering the consolidation effect.” J. Geotech. Geol. Eng., 25(6), 617–629.
Grande, L. (1998). “Some aspects on sheet pile wall analysis.” Soil Struct. Interact. Darmstadt, 1(4), 93–211.
Hashash, Y. M. A., and Whittle, A. J. (1996). “Ground movement prediction for deep excavation in soft clay.” J. Geotech. Eng., 474–486.
Hashash, Y. M. A., and Whittle, A. J. (2002). “Mechanisms of load transfer and arching for braced excavations in clay.” J. Geotech. Geoenviron. Eng., 187–197.
Hatami, K., and Bathurst, R. J. (2005). “Development and verification of a numerical model for the analysis of geosynthetic-reinforced soil segmental walls under working stress conditions.” Can. Geotech. J., 42(4), 1066–1085.
Hatami, K., and Bathurst, R. J. (2006). “Numerical model for reinforced soil segmental walls under surcharge loading.” J. Geotech. Geoenviron. Eng., 673–684.
Hsiung, B. C. B. (2009). “A case study of behavior of deep excavation in sand.” Comput. Geotech., 36(4), 665–675.
Itasca. (2005). User’s guide for FLAC version 5.0, Itasca India Consulting, Nagpur, India.
Janbu, N. (1963). “Soil compressibility as determined by odometer and triaxial tests.” Proc., European Conf. on Soil Mech. and Found. Eng., Vol. 1, Wiesbaden, Germany, 19–25.
Karlsrud, K., and Andresen, L. (2005). “Loads on braced excavations in soft clay.” Int. J. Geomech., 107–113.
Kung, G. T. C. (2009). “Comparison of excavation-induced wall deflection using top-down and bottom-up construction methods in Taipei silty clay.” Comput. Geotech., 36(3), 373–385.
Nakai, T., Hiromichi, K., Murata, K., Banno, M., and Tadashi, H. (1999). “Model tests and numerical simulation of braced excavation in sandy ground: Influences of construction history, wall friction, wall stiffness, strut position and strut stiffness.” Soils Found., 39(3), 1–12.
Ng, C. W. W., and Lings, M. L. (1995). “Effects of modeling soil nonlinearity and wall installation on back-analysis of deep excavation in stiff clay.” J. Geotech. Geoenviron. Eng., 687–695.
Takemura, J., Kondoh, M., Esaki, T., Kouda, M., and Kusakabe, O. (1999). “Centrifuge model tests on doubly propped wall excavation in soft clay.” Soils Found., 39(3), 75–87.
Tefera, T. H., Nordal, S., Grande, L., Sandven, R., and Emdal, A. (2006). “Ground settlement and wall deformation from a large scale model test on a single strutted sheet pile wall in sand.” Int. J. Phys. Numer. Modell. Geotech., 6(2), 1–13.
Vaziri, H. H. (1996). “Numerical study of parameters influencing the response of flexible retaining walls.” Can. Geotech. J., 33(2), 290–308.
Wroth, C. P. (1984). “The interpretation of in situ soil tests – Twenty fourth Rankine lecture.” Géotechnique, 34(4), 449–489.
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© 2015 American Society of Civil Engineers.
History
Received: Apr 17, 2014
Accepted: Dec 18, 2014
Published online: May 2, 2015
Discussion open until: Oct 2, 2015
Published in print: Feb 1, 2016
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