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Stabilization of saturated silty sand by colloidal silica: compressive and cyclic strength and shear wave velocity | ||
| AUT Journal of Civil Engineering | ||
| مقاله 10، دوره 4، شماره 1، خرداد 2020، صفحه 113-124 اصل مقاله (1.68 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/ajce.2019.16165.5572 | ||
| نویسندگان | ||
| Mohammad Amin Nozari1؛ Reza Ziaie Moayed* 2؛ Mohammad Masoud Mohebi3 | ||
| 1PhD Candidate, Faculty of Engineering, Imam Khomeini International University, Iran | ||
| 2Professor, Faculty of Engineering, Imam Khomeini International University, Iran | ||
| 3Associate Prof., Faculty of Engineering, Imam Khomeini International University, Iran | ||
| چکیده | ||
| Passive stabilization of the saturated loose sandy landfills especially in developed regions was researched recent decades. Aiming to passive stabilization and keeping the soil structure undisturbed, colloidal silica was applied as a suitable stabilizer because of the controllable properties such as low viscosity and gelling time. Due to the existence fine content in natural soil layers and its effect on the mechanical behavior of the soil media, it is necessary to study the influence of silty sand. Bender element test as a nondestructive test was conducted on the grouted samples with 0, 10, 20, and 30% silt fraction. Three different colloidal silica were injected to study the effect of different chemical condition on the results. All samples after small strain tests were loaded uniaxially under the unconfined condition to evaluate the cohesion of the samples. A series of selected samples were prepared again, and the undrained cyclic resistance was measured. All results showed that the samples with 10% fine content have a greater value of shear strength parameter as shear wave velocity at 28 days curing time. Also, cyclic strength was dramatically higher than ungrouted samples. However, after 14 days curing time, there was no clear difference while the fine content change. As a result, comparison of the data shows the shear wave velocity is a suitable index to evaluate the degree of soil improvement the grouted silty sand at the site. | ||
| کلیدواژهها | ||
| Shear wave velocity؛ silty sand؛ colloidal silica, passive stabilisation؛ compressive strength | ||
| مراجع | ||
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[1] S. Thevanayagam, W. Jia, Electro-osmotic grouting for liquefaction mitigation in silty soils, in: Grouting and Ground Treatment, 2003, pp. 1507-1517
[2] Y. Huang, L. Wang, Laboratory investigation of liquefaction mitigation in silty sand using nanoparticles, Engineering Geology, 204 (2016) 23- 32.
[3] A. Pamuk, P.M. Gallagher, T.F. Zimmie, Remediation of piled foundations against lateral spreading by passive site stabilization technique, Soil Dynamics and Earthquake Engineering, 27(9) (2007) 864-874 .
[4] M. Gallagher Patricia, T. Conlee Carolyn, M. Rollins Kyle, Full-Scale Field Testing of Colloidal Silica Grouting for Mitigation of Liquefaction Risk, Journal of Geotechnical and Geoenvironmental Engineering, 133(2) (2007) 186-196.
[5] P.M. Gallagher, Y. Lin, Colloidal silica transport through liquefiable porous media, Journal of geotechnical and geoenvironmental engineering, 135(11) (2009) 1702-1712.
[6] M. Mollamahmutoglu, Y. Yilmaz, Pre-and post-cyclic loading strength of silica-grouted sand, Proceedings of the Institution of Civil Engineers[1]Geotechnical Engineering, 163(6) (2010) 343-348.
[7] A. Vranna, T. Tika, Undrained monotonic and cyclic behaviour of a silty sand stabilized with colloidal silica, in: 6th International Conference on Earthquake Geotechnical Engineering, 2015.
[8] R. Yonekura, M. Kaga, Current chemical grout engineering in Japan, in: Grouting, Soil Improvement and Geosynthetics, ASCE, 1992, pp. 725- 736.
[9] R. Yonekura, M. Kaga, Current chemical grout engineering in Japan, in: Grouting, Soil Improvement and Geosynthetics, ASCE, 1992, pp. 725- 736.
[10]P.M. Gallagher, J.K. Mitchell, Influence of colloidal silica grout on liquefaction potential and cyclic undrained behavior of loose sand, Soil Dynamics and Earthquake Engineering, 22(9) (2002) 1017-1026.
[11]P. Persoff, J. Apps, G. Moridis, J.M. Whang, Effect of dilution and contaminants on sand grouted with colloidal silica, Journal of Geotechnical and Geoenvironmental Engineering, 125(6) (1999) 461- 469.
[12]] I. Nouri Delavar, R. Noorzad, Drained shear strength parameters of silty sand grouted by colloidal silica, International Journal of Geotechnical Engineering, (2017) 1-8.
[13]G. Moradi, S. Seyedi, Effect of Soils Hydraulic Conductivity on Colloidal Nano-Silica Permeation, in: Biological Forum, Research Trend, 2015, pp. 493-497.
[14]J. Yang, X. Liu, Shear wave velocity and stiffness of sand: the role of non[1]plastic fines, Géotechnique, (2016).
[15]T. Wichtmann, M.N. Hernández, T. Triantafyllidis, On the influence of a non-cohesive fines content on small strain stiffness, modulus degradation and damping of quartz sand, Soil Dynamics and Earthquake Engineering, 69 (2015) 103-114.
[16]R. Salgado, P. Bandini, A. Karim, Shear strength and stiffness of silty sand, Journal of Geotechnical and Geoenvironmental Engineering, 126(5) (2000) 451-462.
[17]F. Askari, R. Dabiri, A. Shafiee, M.K. Jafari, Liquefaction resistance of sand-silt mixtures using laboratory based shear Wave velocity, International Journal of Civil Engineering, 9(2) (2011) 135-144.
[18]B. Seed, K.L. Lee, Liquefaction of saturated sands during cyclic loading, Journal of Soil Mechanics & Foundations Div, 92(ASCE# 4972 Proceeding) (1966).
[19]Y. Lin, Colloidal silica transport mechanisms for passive site stabilization of liquefiable soils, (2006). | ||
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