Soil-cement columns (SCC) are widely used to improve the engineering properties of soft cohesive soils. Ensuring adequate bearing capacity and controlled settlement is critical in shallow foundation design. This study numerically investigates the effectiveness of SCC reinforcement using PLAXIS 2D, with analyses employing the Mohr-Coulomb and Soft Soil constitutive models. Three soil types—medium-stiff clay, soft clay, and peat—were evaluated to assess foundation performance with and without SCC in terms of load-settlement response, stress distribution, and deformation behavior. Results show that SCC substantially increases load-bearing capacity and stiffness while reducing settlement across all soils. The greatest improvements occur in medium-stiff clay (load: 97.7%, settlement: 70.5%), followed by peat (load: 92.3%, settlement: 69.1%) and soft clay (load: 82.3%, settlement: 63.6%). Stress transfer mechanisms are significantly modified, with stresses concentrated within the columns and their interfaces, resulting in reduced lateral displacement and overall settlement. SCC thus provides an effective approach for enhancing shallow foundation performance, although its efficiency strongly depends on soil type.
References
[1]
Hanash, A.A.A., Ahmed, M.D. and Said, A.I. (2019) Effect of Embedment Depth on Raft Foundation Settlement under Seismic Load. IOPConferenceSeries: MaterialsScienceandEngineering, 584, Article 012017. https://doi.org/10.1088/1757-899x/584/1/012017
[2]
Fahad, R.A., Shakir, R.R. and Ali, H.M. (2023) Evaluation on the SPT Based Design Approach for Shallow Foundations. E3SWebofConferences, 427, Article 01025. https://doi.org/10.1051/e3sconf/202342701025
[3]
Hakro, M.R., Kumar, A., Ali, M., Habib, A.F., de Azevedo, A.R.G., Fediuk, R., et al. (2022) Numerical Analysis of Shallow Foundations with Varying Loading and Soil Conditions. Buildings, 12, Article 693. https://doi.org/10.3390/buildings12050693
[4]
Boru, Y.T., Negesa, A.B., Scaringi, G. and Puła, W. (2022) Settlement Analysis of a Sandy Clay Soil Reinforced with Stone Columns. StudiaGeotechnicaetMechanica, 44, 333-342. https://doi.org/10.2478/sgem-2022-0020
[5]
Lin, L., Hanna, A., Sinha, A. and Tirca, L. (2017) High-Rise Building Subjected to Excessive Settlement of Its Foundation: A Case Study. InternationalJournalofStructuralIntegrity, 8, 210-221. https://doi.org/10.1108/ijsi-05-2016-0019
[6]
Özer, M. (2012) Comparing Methods for Predicting Immediate Settlement of Shallow Foundations on Cohesive Soils Based on Hypothetical and Real Cases. Environmental&EngineeringGeoscience, 18, 371-387. https://doi.org/10.2113/gseegeosci.18.4.371
[7]
Zhuang, X., Zong, Z., Huang, Y., Wang, C. and Lin, X. (2022) Parametric Study on Analyzing the Effect of Soil-Cement Strength on the Uplifting Behavior of HSCM Piles Installed in Marine Soft Clay. AppliedSciences, 13, Article 330. https://doi.org/10.3390/app13010330
[8]
Bruce, M.E.C., Berg, R.R., Filz, G.M., Terashi, M., Yang, D.-S. and Collin, J.G. (2013) Federal Highway Administration Design Manual: Deep Mixing for Embankment and Foundation Support. FHWA-HRT-13-046, Federal Highway Administration.
[9]
Lawton, E.C., Mokashi, A.A. and Fox, N.S. (1996) Field Tests and Numerical Analyses of Subgrade Soil Reinforced with Grids of Stabilized Granular Columns. TransportationResearchRecord: JournaloftheTransportationResearchBoard, 1534, 72-79. https://doi.org/10.1177/0361198196153400111
[10]
Liu, Q.X. and Bai, Y. (2012) The Application of Compaction sand Pile in the Yellow River-Crossing Project for South-to-North Water Diversion. Applied Mechanics and Materials, 226-228, 1396-1400.
[11]
Muhunthan, B. and Sariosseiri, F. (2008) Interpretation of Geotechnical Properties of Cement Treated Soils. Washington State Department of Transportation Research Report.
[12]
Santana, T., Gonçalves, J., Pinho, F. and Micaelo, R. (2021) Effects of the Ratio of Porosity to Volumetric Cement Content on the Unconfined Compressive Strength of Cement Bound Fine Grained Soils. Infrastructures, 6, Article 96. https://doi.org/10.3390/infrastructures6070096
[13]
Sitharam, T.G., Parthasarathy, C. and Kolathayar, S. (2021) Ground Improvement Techniques. Springer Nature.
[14]
Yang, Y., Wang, G., Xie, S., Tu, X. and Huang, X. (2013) Effect of Mechanical Property of Cemented Soil under the Different pH Value. AppliedClayScience, 79, 19-24. https://doi.org/10.1016/j.clay.2013.02.014
[15]
Jalal, F.E., Xu, Y., Jamhiri, B. and Memon, S.A. (2020) On the Recent Trends in Expansive Soil Stabilization Using Calcium‐Based Stabilizer Materials (CSMs): A Comprehensive Review. AdvancesinMaterialsScienceandEngineering, 2020, Article ID: 1510969. https://doi.org/10.1155/2020/1510969
[16]
Ahmadi, H. and Sizkow, S.F. (2020) Numerical Analysis of Ground Improvement Effects on Dynamic Settlement of Uniform Sand Using Dem. SNAppliedSciences, 2, Article No. 689. https://doi.org/10.1007/s42452-020-2502-0
[17]
Basas, V.G., Pantazopoulos, I.A. and Atmatzidis, D.K. (2020) Torsional and Flexural Resonant Column Testing of Grouted Sands. SoilDynamicsandEarthquakeEngineering, 139, Article 106360. https://doi.org/10.1016/j.soildyn.2020.106360
[18]
Lind Östlund, J., Andersson, A., Ülker-Kaustell, M. and Battini, J. (2020) The Influence of Model Assumptions on the Dynamic Impedance Functions of Shallow Foundations. InternationalJournalofCivilEngineering, 18, 1315-1326. https://doi.org/10.1007/s40999-020-00526-3
[19]
Zdravković, L., Potts, D.M. and Taborda, D.M.G. (2021) Integrating Laboratory and Field Testing into Advanced Geotechnical Design. GeomechanicsforEnergyandtheEnvironment, 27, Article 100216. https://doi.org/10.1016/j.gete.2020.100216
[20]
Bouassida, M. (2016) Design of Column-Reinforced Foundations. J. Ross Publishing.
[21]
Kitazume, M. and Terashi, M. (2013) The Deep Mixing Method. Vol. 21, CRC Press.
[22]
Ni, P., Yi, Y. and Liu, S. (2019) Bearing Capacity of Composite Ground with Soil-Cement Columns under Earth Fills: Physical and Numerical Modeling. SoilsandFoundations, 59, 2206-2219. https://doi.org/10.1016/j.sandf.2019.12.004
[23]
Arjmand, A. and Eslami, A. (2024) Appraisal of Soil-Cement Columns Load Displacement Behavior through Full-Scale Tests Database. MarineGeoresources&Geotechnology, 43, 1050-1065. https://doi.org/10.1080/1064119x.2024.2380530
[24]
Ullah, A., Kassim, A., Rashid, A.S.A., Huang, Y., Junaid, M. and Roshan, M.J. (2024) Experimental and 3D Numerical Analysis of Embankment on Soft Soil Improved with Cement Bottom Ash Columns. ActaGeotechnica, 19, 7727-7745. https://doi.org/10.1007/s11440-024-02412-x
[25]
Choudhary, S., Singh, M.J., Kamchoom, V., Choi, C.E. and Borana, L. (2025) Experimental and Numerical Modelling of Time-Dependent Behaviour in Deep Cement Mixing Column Improved Montmorillonitic Clay. OceanEngineering, 332, Article 121451. https://doi.org/10.1016/j.oceaneng.2025.121451
[26]
Hossain, M.S., Fourie, A. and Yi-Wen, B.P. (2015) Rectangular Foundations on a Sand Embankment over Mine Tailings. InternationalJournalofGeomechanics, 15, 1-12. https://doi.org/10.1061/(asce)gm.1943-5622.0000401
[27]
Stuedlein, A.W., Abdollahi, A., Mason, H.B. and French, R. (2018) Shear Wave Velocity Measurements of Stone Column Improved Ground and Effect on Site Response. Proceedings of the 2015 International Foundations Congress and Equipment Expo, San Antonio, 17-21 March 2015, 2306-2317.
[28]
Rahmat, M.N., Ibrahim, S. and Ismail, N. (2019) Ceramic Dust Based Binder for Sustainable Stabilisation of Low Flood-Plain Soil. IOPConferenceSeries: EarthandEnvironmentalScience, 385, Article 012069. https://doi.org/10.1088/1755-1315/385/1/012069
[29]
Pham, M., Pham, D., Vu, D. and Dias, D. (2023) Embankments Reinforced by Vertical Inclusions on Soft Soil: Numerical Study of Stress Redistribution. Geotechnics, 3, 1279-1293. https://doi.org/10.3390/geotechnics3040069
[30]
Das, B.M. and Sobhan, K. (2014) Principles of Geotechnical Engineering. SI Edition, Cengage Learning.
[31]
Lambe, T. and Whitman, R. (1969) Soil Mechanics. Wiley.
[32]
Knappett, J. (2012) Craig’s Soil Mechanics. 8th Edition. Spon Press.
[33]
Bowles, J.E. and Guo, Y. (1996) Foundation Analysis and Design. 5th Edition, McGraw-Hill.
[34]
Fang, Y.-S., Chung, Y.-T., Yu, F.-J. and Chen, T.-J. (2001) Properties of Soil Cement Stabilized with Deep Mixing Method. Proceedings of the ICE-Ground Improvement, 5, 69-74. https://doi.org/10.1680/grim.2001.5.2.69
[35]
ACI (2019) ACI 318-19 & ACI 318R-19: Building Code Requirements for Structural Concrete and Commentary. American Concrete Institute, Farmington Hills.
