Stabilization of Liquefiable Soils Using Colloidal Silica Grout
Publication: Journal of Materials in Civil Engineering
Volume 19, Issue 1
Abstract
Passive site stabilization is a new technology proposed for nondisruptive mitigation of liquefaction risk at developed sites susceptible to liquefaction. It is based on the concept of slowly injecting colloidal silica at the edge of a site with subsequent delivery to the target location using natural or augmented groundwater flow. Colloidal silica is an aqueous dispersion of silica nanoparticles that can be made to gel by adjusting the pH or salt concentration of the dispersion. It stabilizes liquefiable soils by cementing individual grains together in addition to reducing the hydraulic conductivity of the formation. Centrifuge modeling was used to investigate the effect of colloidal silica treatment on the liquefaction and deformation resistance of loose, liquefiable sands during centrifuge in-flight shaking. Loose sand was successfully saturated with colloidal silica grout and subsequently subjected to two shaking events to evaluate the response of the treated sand layer. The treated soil did not liquefy during either shaking event. In addition, a box model was used to investigate the ability to uniformly deliver colloidal silica to loose sands using low-head injection wells. Five injection and two extraction wells were used to deliver stabilizer in a fairly uniform pattern to the loose sand formation. The results of the box model testing will be used to design future centrifuge model tests modeling other delivery methods of the grout.
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Acknowledgments
The writers would like to thank Yuanzhi Lin, Waleska Mora, and Kathy Quinn for running the box model experiments and Stefan Finsterle and Jennifer Schaeffer for their thoughtful reviews of the manuscript. This research was funded by the National Science Foundation through the Multi-Disciplinary Center for Earthquake Engineering Research (MCEER) Research Project No. NSF01-2033, Task 2.3, Geotechnical Rehabilitation: Site and Foundation Remediation.
References
Arulanandan, K., and Scott, R., eds. (1993). Verification of numerical procedures for the analysis of soil liquefaction problems, Balkema, Rotterdam, The Netherlands.
Bartlett, S. F., and Youd, T. L. (1992). “Case histories of lateral spreads caused by the 1964 Alaska earthquake.” Case studies of liquefaction and lifeline performance during past earthquake: United States case studies, T. D. O’Rourke and M. Hamada, eds., Chap. 2, Technical Rep. No. NCEER-92–0002, National Center for Earthquake Engineering Research, Univ. of Buffalo, Buffalo, N.Y., 2-1–2-127.
Dobry, R., and Abdoun, T. (1998). “Post-triggering response of liquefied sand in the free field and near foundations.” Proc., Geotechnical Earthquake Engineering and Soil Dynamics III Conf., ASCE, Reston, Va., 270–300.
Dobry, R., and Abdoun, T. (2001). “Recent studies on seismic centrifuge modeling of liquefaction and its effects on deep foundations.” Proc., 4th Int. Conf. on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics, San Diego.
Gallagher, P. M., and Koch, A. J. (2003). “Model testing of passive site stabilization: A new grouting technique.” Grouting and Ground Treatment: Proc., 3rd Int. Conf., ASCE, Reston, Va., 1478–1489.
Gallagher, P. M., and Lin, Y. (2005). “Column testing to determine colloidal silica transport mechanisms.” Innovations in grouting and soil improvement, ASCE, Reston, Va., 15–26.
Gallagher, P. M., and Mitchell, J. K. (2002). “Influence of colloidal silica grout on liquefaction potential and cyclic undrained behavior of loose sand.” Soil Dyn. Earthquake Eng., 22(9–12), 1017–1026.
Gallagher, P. M., Pamuk, A., Koch, A. J., and Abdoun, T. H. (2002). “Centrifuge Modeling of Passive Site Remediation.” Proc., 7th United States National Conf. on Earthquake Engineering (7NCEE): Urban Earthquake Risk, Earthquake Engineering Research Institute, Oakland, Calif.
Hamada, M., and O’Rourke, T. D. (1992). “Case histories of liquefaction and lifeline performance during past earthquakes.” Technical Rep. No. NCEER-92-0001, National Center for Earthquake Engineering Research, Univ. of Buffalo, Buffalo, N.Y.
Hamada, M., Wakamatsu, K., and Ando, T. (1996). “Liquefaction-induced ground deformation and its caused damage during the 1995 Hyogoken-Nanbu earthquake.” Proc., 6th Japan-United States Workshop on Earthquake Resistant Design of Lifeline Facilities and Countermeasures against Soil Liquefaction, Technical Rep. No. NCEER-96–0012, National Center for Earthquake Engineering Research, Univ. of Buffalo, Buffalo, N.Y., 137–152.
Hamada, M., Yasuda, S., Isoyama, R., and Imoto, K. (1986). Study on liquefaction-induced permanent ground displacements, Association for the Development of Earthquake Prediction, Tokyo.
Iler, R. K. (1979). The chemistry of silica: Solubility, polymerization, colloid, and surface properties, and biochemistry, Wiley, New York.
Ishihara, K., Yasuda, S., and Nagase, H. (1996). “Soil characteristics and ground damage.” Soils Found., Special, January, 109–118.
Liao, H. J., Huang, C. C., and Chao, B. S. (2003). “Liquefaction resistance of a colloid silica grouted sand.” Grouting and ground treatment: Proc. 3rd Int. Conf., ASCE, Reston, Va., 1305–1313.
National Research Council (NRC) (1985). “Liquefaction of soils during earthquakes.” Rep. No. CETS-EE-001, Committee on Earthquake Engineering, National Academy Press, Washington, D.C.
O’Rourke, T. D., and Hamada, M. (1992). “Case studies of liquefaction and lifeline performance during past earthquakes: United States case studies.” Tech. Rep. No. NCEER-92–0002, National Center for Earthquake Engineering Research, Univ. of Buffalo, Buffalo, N.Y.
Pamuk, A. (2004). “Physical modeling of retrofitted pile groups including passive site remediation against lateral spreading.” Ph.D. thesis, Rensselaer Polytechnic Institute, Troy, N.Y.
Persoff, P., Apps, J., Moridis, G., and Whang, J. M. (1999). “Effect of dilution and contaminants on sand grouted with colloidal silica.” J. Geotech. Geoenviron. Eng., 125(6), 461–469.
Taboada, V. M. (1995). “Centrifuge modeling of earthquake-induced lateral spreading in sand using a laminar box.” Ph.D. thesis, Rensselaer Polytechnic Institute, Troy, N.Y.
Whang, J. M. (1995). “Section 9—Chemical-based barrier materials.” Assessment of barrier containment technologies for environmental remediation applications, R. R. Rumer and J. K. Mitchell, eds., NTIS, Springfield, Va., 211–247.
Yonekura, R., and Kaga, M. (1992). “Current chemical grout engineering in Japan.” Proc., Grouting, Soil Improvement and Geosynthetics, ASCE, New York, 725–736.
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© 2007 ASCE.
History
Received: Feb 11, 2005
Accepted: Jul 29, 2005
Published online: Jan 1, 2007
Published in print: Jan 2007
Notes
Note. Associate Editor: Hilary I. Inyang
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