RELAIBILITY ASSESSMENT OF THE SOIL-WATER-RETENTION FOR UNSATURATED SAND SOILS

Mohammed Shakir; Mustafa Abrahim; Salah Saleh

doi:10.30572/2018/KJE/160101

Authors

Mohammed Shakir Mahmood Civil Eng. Dept., University of Kufa, Al-Najaf, Iraq https://orcid.org/0000-0002-7725-2519
Mustafa Jamal Abrahim Civil Eng Dept., Al Iraqia University, Baghdad, Iraq
Salah Mahdi Saleh Formerly MSc. Student, Civil Eng. Dept., University of Kufa, Al-Najaf, Iraq

DOI:

https://doi.org/10.30572/2018/KJE/160101

Keywords:

Gypseous sand, Najaf, unsaturated soil, SWCC, net normal stress

Abstract

In this investigation, the soil-water-retention is described in the soil-water-characteristics-curve (SWCC). SWCC contains the data required to explain the unsaturated soils' mechanical behavior. The reliable findings of unsaturated sand soil tests and the impact of initial density on the hydraulic properties under various matric suction and net normal stresses are examined. The tests are carried out on a sample of soil from the northern region of Al-Najaf city, Iraq. The sample of soil has been disturbed and remolded in the cell of Oedometer device. A modified high-air-entry-disc-based Oedometer is used with accessories to control the air and water pressures to achieve the specific matric suction in the unsaturated test. Two sets of tested specimens are prepared, first, at 90% and second at 95% of the maximum dry unit weight from the standard Proctor experiment. Each set is performed for different matric suction under 200 and 400 kPa net normal stress. (SWCC) The soil water retention curve is affected by the application of net normal stress and initial density. There is a decrease in water volume change with wetting progress in unsaturated soil tests due to an increase in soil density.

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References

Abdalhusain, M. M., Akhtarpour, A., Mahmood, Mohammed Sh. (2019b) 'Effect of wetting process with presence of matric suction on unsaturated gypseous sand soils', Journal of Southwest Jiaotong University, 54(5), 1-11. https://doi.org/10.35741/issn.0258-2724.54.5.3 DOI: https://doi.org/10.35741/issn.0258-2724.54.5.3

Abdalhusein, M. M., Akhtarpour, A., Mahmood, M. Sh. (2019a) 'Effect of Soaking on Unsaturated Gypseous Sand Soils', International Journal of Civil Engineering and Technology, 10(5), 550-558.

Abdalhusein, M.M., Akhtarpour, A., Almahmodi, R., Mahmood, M.S. (2023). Investigation of Shear Strength Parameters for Gypseous Soils Using a Modified Apparatus of Triaxial Test. In: Karkush, M., Choudhury, D., Han, J. (eds) Current Trends in Geotechnical Engineering and Construction. ICGECI 2022. Springer, Singapore. https://doi.or DOI: https://doi.org/10.1007/978-981-19-7358-1_27

Abrahim, M.J., Mahmood, M.Sh. (2021b). 'Water Volume Change Due to Wetting of Unsaturated Gypseous Sand Using Modified Oedometer', IOP Conf. Series: Earth and Environmental Science, 856, 012048. https://doi.org/10.1088/1755-1315/856/1/012048. DOI: https://doi.org/10.1088/1755-1315/856/1/012048

Abrahim, M.J., Mahmood, M.Sh. (2021a) 'Effect of Wetting Progress on The Potential Collapse of Gypseous Sand Using Modified Oedometer', International Journal of Engineering, Transactions C: Aspects, 34(12). https://doi.org/10.5829/IJE.2021.34.12C.08 DOI: https://doi.org/10.5829/ije.2021.34.12c.08

Ahmed, K.I., (2013) Effect of Gypsum on the Hydro-Mechanical Characteristics of Partially Saturated Sandy Soil, Ph.D. Dissertation, Geoenvironmental Research Centre, Cardiff School of Engineering, Cardiff University, UK.

Aldaood A, Bouasker M. and Al-Mukhtar M. (2015) 'Effect of long-term soaking and leaching on the behaviour of lime-stabilized gypseous soil'. International Journal of Pavement Engineering. 6(1):11-26. https://doi.org/10.1080/10298436.2014.893329 DOI: https://doi.org/10.1080/10298436.2014.893329

Aldarraji, Suha A. and Ganjian, Navid (2024) Void Ratio Change for Nanoclay-Treated Gypsiferous Sand under Stress-Curing-Soaking Combination, Proceedings of 1st International Research Conference on Engineering and Applied Sciences (IRCEAS2023), AIP publishing, to be published.

Aldarraji, Suha A., Ganjian, Navid and Mahmood, Mohammed Sh., (2024) 'Mechanical Behavior of Pre-Test-Curing Nanoclay-Treated Gypseous Sand', Proceedings of Fifth International Scientific Conference of Alkafeel University (ISCKU 2024), to be published. DOI: https://doi.org/10.1051/bioconf/20249700040

Al-Obaidi, Q, Karim H, Al-Shamoosi A. (2020) 'Collapsibility of gypseous soil under suction control', IOP Conference Series Materials Science and Engineering, , 737(1). https://doi.org/10.1088/1757-899X/737/1/012103 DOI: https://doi.org/10.1088/1757-899X/737/1/012103

Estabragh A.R. and Javadi A.A. (2012) 'Effect of Suction on Volume Change and Shear Behavior of an Overconsolidated Unsaturated Silty Soil', Geomechanics and Engineering. 4(1), 55-65. https://doi.org/10.12989/gae.2012.4.1.055 DOI: https://doi.org/10.12989/gae.2012.4.1.055

Fattah, M. Y. and Al-Shakarchi, Y. J. (2008) Long-term deformation of some gypseous soils, Engineering and Technology Journal, 26(12), 1461-1483. DOI: https://doi.org/10.30684/etj.26.12.3

Fattah, M. Y., Al-Ani, M. M. and Al-Lamy, M. T. (2014) 'Studying collapse potential of gypseous soil treated by grouting, Soils and Foundations', 54(3), 396-404. https://doi.org/10.1016/j.sandf.2014.04.008 DOI: https://doi.org/10.1016/j.sandf.2014.04.008

Fredlund, D.G. and Rahardjo, H. (1993) Soil Mechanics for Unsaturated Soils, John Wiley & Sons, Canada, ISBN:9780471850083. DOI: https://doi.org/10.1002/9780470172759

Gallag, C. and Uchimura, T.(2010) 'Effects of dry density and grain size distribution on soil-water characteristic curves of sandy soils', Soils and Foundations, 161-172. DOI: https://doi.org/10.3208/sandf.50.161 DOI: https://doi.org/10.3208/sandf.50.161

Haeri, S. M., Garakani, A. A., Khosravi, A. and Meehan, Ch. L. (2014) 'Assessing the Hydro Mechanical Behavior of Collapsible Soils Using a Modified Triaxial Test Device', Geotechnical Testing Journal, 37(2), 190-204. https://doi.org/10.1520/GTJ20130034 DOI: https://doi.org/10.1520/GTJ20130034

Haeri, S.M., Zamani, A. and Garakani, A. A. (2012) 'Collapse potential and permeability of undisturbed and remolded loessial soil samples'. Unsaturated Soils: Research and Applications. 1st edition, 301-308. https://doi.org/10.1007/978-3-642-31116-1_41 DOI: https://doi.org/10.1007/978-3-642-31116-1_41

Leong, C. (2019) 'Soil-water characteristic curves - Determination, estimation and application', Japanese Geotechnical Society Special Publication, 7(2), 21-30. https://doi.org/10.3208/jgssp.v07.003 DOI: https://doi.org/10.3208/jgssp.v07.003

Liu, C, He, P. and Huang, Q. (2011) 'Influence of matrix suction on engineering properties of unsaturated soil', 2nd International Conference on Mechanic Automation and Control Engineering; IEEE. https://doi.org/10.1109/MACE.2011.5987427 DOI: https://doi.org/10.1109/MACE.2011.5987427

Mahmood, M. Sh. and Abrahim, M. J. (2024) 'Sensitivity of Unsaturated Tests Results For Time-Based Remolded Gypseous Sand Specimens', AIP Conf. Proc. 2864, 030004. https://doi.org/10.1063/5.0186102 DOI: https://doi.org/10.1063/5.0186102

Mahmood, Mohammed Sh. (2018) 'Effect of Soaking on the Compaction Characteristics of Al-Najaf Sand Soil'. Kufa Journal of Engineering, 9(2), 1-12. https://doi.org/10.30572/2018/kje/090201 DOI: https://doi.org/10.30572/2018/KJE/090201

Mahmood, Mohammed Sh. (2018) 'Prediction of Discrepancy Settlement Behaviour of Sand Soils', Applied Research Journal, Iran, 4(2), 30-37.

Mahmood, Mohammed Sh. and Abrahim, Mustafa J. (2021) 'A Review of Collapsible Soils Behavior and Prediction', IOP Conference Series: Materials Science and Engineering, IOP Conf. Ser.: Mater. Sci. Eng. 1094 012044. https://doi.org/10.1088/1757-899X/1094/1/012044 DOI: https://doi.org/10.1088/1757-899X/1094/1/012044

Mahmood, Mohammed Sh., Akhtarpour, A. and Almahmodi, R., Husain, M. M. A, (2020) 'Settlement assessment of gypseous sand after time-based soaking', IOP Conference Series: Materials Science and Engineering, 737, https://doi.org/10.1088/1757-899X/737/1/012080 DOI: https://doi.org/10.1088/1757-899X/737/1/012080

Mahmood, Mohammed Sh., Aziz L.J. and Al-Gharrawi A. (2018) 'Settlement Behavior of Sand Soil Upon Soaking Process', International Journal of Civil Engineering and Technology, India, 9(11), 860–869.

Maleksaeedi, Emad, Nuth, Mathieu and Chekired, Mohamed, (2016) 'A modified Oedometer apparatus for experimentally obtaining the soil-water retention curve'. Proc of: Geovancouver Conference,.

Nam, S., Gutierrez, M., Diplas, P., Petrie, J., Wayllace, A., Lu, N. and Muñoz, J. (2010) 'Comparison of testing techniques and models for establishing the SWCC of riverbank soils. Engineering Geology, 110(1), 1-10. https://doi.org/10.1016/j.enggeo.2009.09.003 DOI: https://doi.org/10.1016/j.enggeo.2009.09.003

Ng, Ch. W. W. and Menzies, B., (2007) Advanced unsaturated soil mechanics and engineering, 1st Edition, Canada: Taylor & Francis Group.

Safarzadeh, Z. and Aminfar, M. H. (2019) 'Experimental and Numerical Modeling of the Effect of Groundwater Table Lowering on Bearing Capacity of Shallow Square Footings', International Journal of Engineering (IJE), IJE Transaction A: Basics, 32(10), 1429-1436. https://doi.org/10.5829/ije.2019.32.10a.12 DOI: https://doi.org/10.5829/ije.2019.32.10a.12

Saleh, S. M. and Mahmood, M. Sh. (2023) 'Behavior of load-settlement-time for short-term wetting in unsaturated test of Al-Najaf gypseous soil', AIP Conf. Proc., 2787(1): 080023. https://doi.org/10.1063/5.0148016 DOI: https://doi.org/10.1063/5.0148016

Saleh, S.M., Mahmood, M.Sh. (2024) 'Stress-Dependent Soil-Water Relationship For Unsaturated Gypseous Sand', 5th International Conference on Civil and Environmental Engineering Technologies (ICCEET2024), AIP conference proceedings, to be published. DOI: https://doi.org/10.1063/5.0236231

Zhu, Hong, Zhang, Limin, Chen, Chen and Chan, Kit. (2018) 'Three-Dimensional Modelling of Water Flow Due To Leakage from Pressurized Buried Pipe', Geomechanichs and Engineering, 16(4), , 423-433. https://doi.org/10.12989/gae.2018.16.4.423

Zimbardo, M., Ercoli, L. and Megna, B. (2016) 'The open metastable structure of a collapsible sand: fabric and bonding'. Bull. Eng. Geol. Environ., 75(1), 125–139. https://doi.org/10.1007/s10064-015-0752-7 DOI: https://doi.org/10.1007/s10064-015-0752-7