Jul 2026· International Journal of Geotechnical Engineering· Vol 20, pp. 793 - 807· 0 citations· 27 references
Abstract
ABSTRACT Slope failures often occur during soil wetting, yet most analyses rely solely on drying soil-water characteristic curve (SWCC), leading to results that do not reflect field conditions. This study develops a mathematical model to estimate bimodal permeability functions under both soil drying and wetting, and to investigate the influence of hysteresis on the stability of dual-porosity soil slopes. Analyses were performed under three scenarios: using only the drying SWCC, using only the wetting SWCC, and using both the drying and wetting SWCCs. Rainfall patterns were chosen according to records of rainfall intensities in central Asia. Drying and wetting SWCCs were tested in the laboratory, while the shear strength of unsaturated soil was a function of matric suction linked to the SWCC. Comparing the results of analyses using the three scenarios indicates that ignoring hysteresis provides an ‘overly conservative’ factor of safety, with differences of up to 67%. Thus, using the relevant SWCC to model drying and wetting processes in slope stability analyses is important to avoid unsafe or excessively conservative designs.
Landslides on steep slopes composed of tropical volcanic soils constitute a major geotechnical hazard because intensive weathering and variations in water content can substantially affect soil shear strength and slope stability. This study evaluated the effectiveness of moisture-controlled compaction in improving the s...
Semangat Marudut Tua Debataraja· Journal of Hunan University...· 0 citations
Rainfall-induced slope failures pose significant risks and economic impacts globally. This study investigates the impact of rainfall on the hydromechanical behavior and stability of unsaturated lateritic slopes, commonly found in tropical regions. By employing both experimental and computational analyses, this research...
Pedro Henrique Lopes Dal-Cól, Alana Dias de Oliveira, Gilson de Farias Neves Gitirana et al.· Quaternary and Environmental...· 0 citations
Rainfall-induced instability is a major concern for unsaturated residual soil slopes in tropical regions, where porewater pressure and matric suction fluctuate rapidly under transient hydrological conditions. This study investigates the hydro-mechanical response of the Bukit Mewah slope in Selangor through a fully coup...
Faris Shazani Suhaizan, Aizat Mohd Taib, M. Taha· Jurnal Kejuruteraan· 0 citations
Climate change, characterised by rising temperatures and changing precipitation patterns, significantly impacts the geotechnical behaviour of soil. This includes alterations in soil’s shear strength, compressibility, and permeability, which in turn affect soil structure and its ability to manage water absorption and re...
Norshakila Abdul Wahab, Ahmad Safuan A. Rashid, Azman Kassim et al.· Jurnal Kejuruteraan· 0 citations
Researchers have extensively studied the Use of granular piles (sand columns) as a ground improvement technique under fully saturated conditions, but have paid limited attention to the influence of the unsaturated zone, which reflects soil conditions in arid and semi-arid regions. However, their behavior in partially s...
