https://orcid.org/0000-0002-5666-2519
Abstract
Rammed soil-cement column (RSCC) is a relatively new technology for soft ground improvement. Its properties and construction are different from traditional soil-cement column. The reinforcement mechanism and the effectiveness of RSCC, especially combined with geogrid reinforcement at the bottom of an embankment, are not well understood. In this study, four centrifuge model tests were conducted to investigate the behavior and reinforcement mechanism of geogrid-reinforced, rammed soil-cement column-supported embankments. Displacements, stress concentration ratios, and failure modes of such embankments were obtained in the tests. The test results indicate that RSCC can effectively reduce total and differential settlements and increase global and local stability of embankment on soft ground. Geogrid can reduce the lateral displacement of embankment and facilitate load transfer from the soil to the columns; this reduces the potential of soil yielding and improves the stability of the embankment. Without RSCCs, sliding failure can occur in embankment with or without geogrid reinforcement beneath the embankment. The shear sliding can be circular or noncircular.
Issue Section:
Technical Notes
References
1.
Han
, J.
and Gabr
, M. A.
, “Numerical Analysis of Geosynthetic-Reinforced and Pile-Supported Earth Platforms over Soft Soil
,” J. Geotech. Geoenviron.
, Vol. 128
, No. 1
, 2002
, pp. 44
–53
, https://doi.org/10.1061/(ASCE)1090-0241(2002)128:1(44)2.
Kasali
, G.
and Taki
, O.
, “Design and Construction Aspects of Soil Cement Columns as Foundation Elements
,” presented at the Third International Conference on Grouting and Ground Treatment
, New Orleans, LA, Feb. 10–12, 2003
, Geo-Institute of ASCE
, Reston, VA
, pp. 540
–551
, https://doi.org/10.1061/40663(2003)273.
Jenck
, O.
, Dias
, D.
, and Kastner
, R.
, “Two-Dimensional Physical and Numerical Modeling of a Pile-Supported Earth Platform over Soft Soil
,” J. Geotech. Geoenviron. Eng.
, Vol. 133
, No. 3
, 2007
, pp. 295
–305
, https://doi.org/10.1061/(ASCE)1090-0241(2007)133:3(295)4.
Deb
, K.
, Chandra
, S.
, and Basudhar
, P. K.
, “Response of Multilayer Geosynthetic-Reinforced Bed Resting on Soft Soil with Stone Columns
,” Comput. Geotech.
, Vol. 35
, No. 3
, 2008
, pp. 323
–330
, https://doi.org/10.1016/j.compgeo.2007.08.0045.
Guo
, Z. X.
, Liu
, J.
, and Qi
, Y. S.
, “Cushion Impact on Bearing Capacity Exerting Degree of Soil between Piles for Rammed Cement-Soil Pile Composite Foundation
,” Adv. Mater. Res.
, Vol. 250–253
, 2011
, pp. 1498
–1502
, https://doi.org/10.4028/www.scientific.net/AMR.250-253.14986.
Tong
, J.-X.
, Yan
, M.-L.
, Sun
, X.-H.
, Yang
, X.-H.
, and Wang
, M.-S.
, “Experimental Study of Relationship between Effective Pile Length and Pile Strength for Rammed Soil Cement Pile Composite Foundation
,” Rock Soil Mech.
, Vol. 33
, No. S1
, 2012
, pp. 30
–36
.7.
Zhang
, M.
and Li
, J.
, “Cushion on Bearing Characteristics of Rammed Cement-Soil Pile Composite Foundation
,” presented at the International Conference on Civil Engineering, Civil Engineering in China-Current Practice and Research
, Shanghai, China, Dec. 6–7, 2012
, Shanghai Society of Civil Engineering
, Shanghai, China
, pp. 553
–556
.8.
Deb
, K.
, “A Mathematical Model to Study the Soil Arching Effect in Stone Column-Supported Embankment Resting on Soft Foundation Soil
,” Appl. Math. Modell.
, Vol. 34
, No. 12
, 2010
, pp. 3871
–3883
, https://doi.org/10.1016/j.apm.2010.03.0269.
Viswanadham
, B. V. S.
and König
, D.
, “Centrifuge Modeling of Geotextile-Reinforced Slopes Subjected to Differential Settlements
,” Geotext. Geomembr.
, Vol. 27
, No. 2
, 2009
, pp. 77
–88
, https://doi.org/10.1016/j.geotexmem.2008.09.00810.
Chen
, H.-T.
, Hung
, W.-Y.
, Chang
, C.-C.
, Chen
, Y.-J.
, and Lee
, C.-J.
, “Centrifuge Modeling Test of a Geotextile-Reinforced Wall with a Very Wet Clayey Backfill
,” Geotext. Geomembr.
, Vol. 25
, No. 6
, 2007
, pp. 346
–359
, https://doi.org/ 10.1016/j.geotexmem.2007.01.00311.
Wang
, L.
, Zhang
, G.
, and Zhang
, J.-M.
, “Centrifuge Model Tests of Geotextile-Reinforced Soil Embankments during an Earthquake
,” Geotext. Geomembr.
, Vol. 29
, No. 3
, 2011
, pp. 222
–232
, https://doi.org/10.1016/j.geotexmem.2010.11.00212.
Sharma
, J. S.
and Bolton
, M. D.
, “Centrifugal and Numerical Modelling of Reinforced Embankments on Soft Clay Installed with Wick Drains
,” Geotext. Geomembr.
, Vol. 19
, No. 1
, 2001
, pp. 23
–44
, https://doi.org/10.1016/S0266-1144(00)00009-113.
Chen
, J.-F.
and Yu
, S.-B.
, “Centrifuge Modeling of a Geogrid-Reinforced Embankment with Lime-Stabilized Soil as Backfill on Soft Soil
,” Bull. Eng. Geol. Environ.
, Vol. 68
, No. 4
, 2009
, pp. 511
–516
, https://doi.org/10.1007/s10064-009-0231-014.
Howell
, R.
, Rathje
, E. M.
, Kamai
, R.
, and Boulanger
, R.
, “Centrifuge Modeling of Prefabricated Vertical Drains for Liquefaction Remediation
,” J. Geotech. Geoenviron. Eng.
, Vol. 138
, No. 3
, 2012
, pp. 262
–271
, https://doi.org/10.1061/(ASCE)GT.1943-5606.000060415.
Zornberg
, J.
, Mitchell
, J.
, and Sitar
, N.
, “Testing of Reinforced Slopes in a Geotechnical Centrifuge
,” Geotech. Test. J.
, Vol. 20
, No. 4
, 1997
, pp. 470
–480
, https://doi.org/10.1520/gtj10413j16.
Huang
, M.
and Li
, B.
, “Centrifuge Modeling of Pile-Supported Earth Platforms with Non-uniform Cement-Soil Mixing Piles
,” presented at the First International Symposium on Ground Improvement Technologies and Case Histories
, Singapore, Dec. 9–11, 2011
, Geotechnical Society of Singapore
, Singapore
, pp. 461
–468
, https://doi.org/10.3850/gi09517.
Horpibulsuk
, S.
, Chinkulkijniwat
, A.
, Cholphatsorn
, A.
, Suebsuk
, J.
, and Liu
, M. D.
, “Consolidation Behavior of Soil-Cement Column Improved Ground
,” Comput. Geotech.
, Vol. 43
, 2012
, pp. 37
–50
, https://doi.org/10.1016/j.compgeo.2012.02.00318.
Venda Oliveira
, P. J.
, Pinheiro
, J. L. P.
, and Correia
, A. A. S.
, “Numerical Analysis of an Embankment Built on Soft Soil Reinforced with Deep Mixing Columns: Parametric Study
,” Comput. Geotech.
, Vol. 38
, No. 4
, 2011
, pp. 566
–576
, https://doi.org/10.1016/j.compgeo.2011.03.00519.
Lambert
, S.
, Rocher-Lacoste
, F.
, and Le Kouby
, A.
, “Soil-Cement Columns, an Alternative Soil Improvement Method
,” presented at the ISSMGE-TC211 International Symposium on Ground Improvement
, Brussels, Belgium, May 31–June 1, 2012
, Croatian Geotechnical Society
, Hrvatska, Croatia
, 10p.20.
Cui
, W.
and Yan
, S.-W.
, “Centrifugal Model Test of an Embankment on Soft Clay Reinforced with Geogrid and Supported by Soil-Cement Piles
,” Rock Soil Mech.
, Vol. 29
, No. 5
, 2008
, pp. 1315
–1319
, https://doi.org/10.3969/j.issn.1000-7598.2008.05.03221.
Guo
, Z.-X.
, Yang
, Z.-H.
, and Wang
, Z.-L.
, “Experimental Study of Load Transfer Behavior of Rammed Soil-Cement Piles
,” Rock Soil Mech.
, Vol. 27
, No. 11
, 2006
, pp. 2020
–2024
, https://doi.org/10.3969/j.issn.1000-7598.2006.11.03222.
Li
, Y.
, Peng
, Z.
, and He
, J.
, “Comparative Experimental Study on Working Behavior of Rammed Cement-Soil Pile-Net Composite Foundation
,” J. Cent. South Univ. Sci. Technol.
, Vol. 45
, No. 10
, 2014
, pp. 3531
–3535
.
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