Abstract
The stability of the column-supported embankment may become one of the major concerns when constructed over soft clay. The numerical methods referred to as strength reduction method and the load increase method can be adopted to analyze the stability. However, limited studies have been conducted to examine the differences between load increase and strength reduction methods in the stability analysis of the column-supported embankments over soft soil. A three-dimensional (3-D) finite element method incorporated in the ABAQUS software was used in this study to investigate the contribution of deep mixed (DM) columns to the stability of the embankment over soft soil. The strength reduction method and the load increase method were implemented to obtain the factors of safety in stability. The maximum moments carried by the DM columns below the embankment crest were much less than those carried by the columns below the embankment slope. The failure modes of DM columns under embankment can be classified into four zones from the centerline to the toe, namely, compression zone, shear zone, a combination of compression and bending zone, and a combination of extension and bending zone. The factors of safety based on the strength reduction were equal to or higher than those based on the load increase.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Baker, S.: Deformation behavior of lime/cement column stabilized clay. Chalmers University of Technology, pp. 30–39 (2000)
Broms, B.B.: Can lime/cement columns be used in Singapore and Southeast Asia? In: 3rd GRC Lecture, 19 November, Nanyang Technological University and NTU-PWD Geotechnical research Centre, 214p (1999)
Coastal Development Institute of Technology (CDIT): The Deep Mixing Method: Principle, Design and Construction. A.A. Balkema Publishers, Tokyo (2002)
Dawson, E.M., Roth, W.H., Drescher, A.: Slope stability analysis by strength reduction. Geotechnique 49(6), 835–840 (1999)
Griffiths, D.V.: Observations on load and strength factors in bearing capacity analysis. J. Geotech. Geoenviron. Eng. 141(7), 06015004 (2015)
Han, J., Chai, J.C., Leshchinsky, D., et al.: Evaluation of deep-seated slope stability of embankments over deep mixed foundations. Anim. Reprod. Sci. 159, 163–171 (2004)
Jamsawang, P., Yoobanpot, N., Thanasisathit, N., et al.: Three-dimensional numerical analysis of a DCM column-supported highway embankment. Comput. Geotech. 72, 42–56 (2016)
Kitazume, M., Maruyama, K.: Centrifuge model tests on failure pattern of group column type deep mixing improved ground. Soils Found. 40(4), 43–55 (2007)
Navin, M.P., Filz, G.M.: Numerical stability analyses of embankments supported on deep mixed columns. In: Geoshanghai International Conference, pp. 1–8 (2006)
Zhang, Z., Han, J., Ye, G.B.: Numerical analysis of failure modes of deep mixed column-supported embankments on soft soils. In: Geoshanghai International Conference, pp. 78–87 (2014)
Acknowledgments
The authors appreciate the financial support provided by the Natural Science Foundation of China (NSFC) (Grant No. 51508408 & No. 51478349) and the Pujiang Talents Scheme (No. 15PJ1408800) for this research.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Zhang, Z., Xiao, Y., Ye, GB., Han, J., Wang, M. (2018). Numerical Investigation on Slope Stability of Deep Mixed Column-Supported Embankments Over Soft Clay Induced by Strength Reduction and Load Increase. In: Li, L., Cetin, B., Yang, X. (eds) Proceedings of GeoShanghai 2018 International Conference: Ground Improvement and Geosynthetics. GSIC 2018. Springer, Singapore. https://doi.org/10.1007/978-981-13-0122-3_10
Download citation
DOI: https://doi.org/10.1007/978-981-13-0122-3_10
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-13-0121-6
Online ISBN: 978-981-13-0122-3
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)