Impact of drying-wetting cycles on shear properties, suction, and collapse of sebkha soils

Hafhouf, Ilyas; Abbèche, Khelifa

doi:10.1016/j.heliyon.2023.e13594

Cited by 6 publications

(2 citation statements)

References 42 publications

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“…Zhu et al [39] and Khan et al [9] reported a decrease in both cohesion and angle of internal friction of soil with wd cycles for expansive soils. Hafhouf et al [40] reported a significant reduction in cohesion but an increase in the angle of friction of Sebkha soil with wd cycles. The deterioration of soil shear strength due to wetting and drying cycles results from interactions across multiple levels.…”

Section: Discussionmentioning

confidence: 99%

Evolution of Soil Pore Structure and Shear Strength Deterioration of Compacted Soil under Controlled Wetting and Drying Cycles

Turrakheil,

Shah,

Naveed

2024

Preprint

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The study investigates the evolution of soil pore structure and shear strength deterioration in compacted clayey soil under controlled wetting and drying (wd) cycles, which are expected to become more frequent due to climate change. Thirty soil samples were compacted at optimal moisture content and 90% of maximum dry density. These samples were then subjected to 0, 1, 5, 10, and 15 controlled wd cycles from saturation to the wilting point, and volumetric changes were recorded during each cycle. After the wd treatment, the soil samples were scanned using X-ray Computed Tomography (CT) at 50 μm resolution and then sheared under unconsolidated-undrained and consolidated-undrained conditions in a triaxial test. Significant shrinkage and swelling of soil samples were observed during wd cycles, with average volumetric strain fluctuating between +12% at saturation and -5% at the wilting point. X-ray CT visualisation and analysis revealed higher porosity, more prominent pores and increased pore length in soil samples with increasing wd cycles. Both undrained and effective soil shear strength markedly decreased with increasing wd cycles. CT-derived macroporosity and pore length were significant predictors of the soil's undrained and effective shear strength when exposed to wd cycles. The findings emphasise the considerable impact of climate change, specifically wd cycles, on clayey soil, highlighting the need for consideration in the design of earth-based infrastructure.

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Section: Discussionmentioning

confidence: 99%

Evolution of Soil Pore Structure and Shear Strength Deterioration of Compacted Soil under Controlled Wetting and Drying Cycles

Turrakheil,

Shah,

Naveed

2024

Preprint

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“…Most of the primary infrastructure is located along the Gulf coastline on sabkha soil (weak soil). Numerous residential and industrial developments are being built along the coastal area in line with the extensive urban planning and utilization of open spaces (2) . Due to the unstable soil, rising water tables, and high salinity of the water in sabkha locations, several technical issues have been encountered.…”

Section: Introductionmentioning

confidence: 99%

The Electrokinetic Stabilization (EKS) Green Approach Towards Improving the Geotechnical Properties of the Gulf Sabkha Soil at Rabigh, Saudi Arabia

Babar,

Hasan,

Wahab

2023

IJST

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Objectives: Sabkha soil is widely formed in the Arabian Gulf in the Kingdom of Saudia Arabia, particularly along the coastline. Over the past 25 years, numerous studies have been conducted to understand and characterize sabkha soil and increase its strength and durability. To enhance the geotechnical properties of Sabkha soil using an environmentally friendly electrokinetic stabilization method. From a geotechnical perspective, the construction process heavily depends on improving weak soil strength, durability, and treatment cost. The presence of water, high salinity, low shear strength, and low specific gravity are the soft geotechnical features that need to be enhanced before any construction on sabkha soil. Methods/Analysis: The electrokinetic stabilization method was applied to extract salty particles and enhance the geotechnical properties of sabkha soil. The voltage gradient of 40 V was applied for 1, 3, and 7 days using stainless steel electrodes. Findings: The result showed an outstanding improvement of sabkha soil geotechnical properties where the shear strength was increased from 116 to 165, 230, and 360 kPa for Rabigh I (RI), 122 to 155, 254, and 371 kPa for Rabigh II (RII), and for Rabigh III (RIII), the shear strength was improved up to 405 kPa. The moisture content decreased from 34.5 to 16.8% for RI, 35.2 to 15.9% for RII, and 37.5 to 14.7% for RIII. Novelty and applications: Experimental results demonstrated that all parameters were improved massively by increasing the voltage gradient and operational time. This technique is highly recommended to strengthen weak soil and improve geotechnical properties.

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Review on the impact of gypsum concentration on soil characteristics

Al Watar,

Al-Kifae

2024

AIP Conference Proceedings

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Impact of drying-wetting cycles on shear properties, suction, and collapse of sebkha soils

Cited by 6 publications

References 42 publications

Evolution of Soil Pore Structure and Shear Strength Deterioration of Compacted Soil under Controlled Wetting and Drying Cycles

Evolution of Soil Pore Structure and Shear Strength Deterioration of Compacted Soil under Controlled Wetting and Drying Cycles

The Electrokinetic Stabilization (EKS) Green Approach Towards Improving the Geotechnical Properties of the Gulf Sabkha Soil at Rabigh, Saudi Arabia

Review on the impact of gypsum concentration on soil characteristics

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