Abstract
Collapsible soils are problematic soils which exist in numerous areas worldwide. They can be described as metastable soils that lose their strength and deform when they are wetted with/without stress. Several researches have been published regarding their origins, descriptions, characteristics and treatment methods. However, this research aims to explore the deformation behavior of a collapsible soil at different combinations of degrees of saturation and vertical stresses. The results, obtained from several typical and modified single oedometer tests, along with an upcoming experimental tests program would be used to validate a newly proposed approach for more accurate calculation of collapse settlement as opposed to the regularly utilized collapse potential method. The oedometer tests mainly followed the procedure described in the ASTM D5333-03 standard. A comparison was also conducted between the estimated collapse strains at stresses lower than the stress at inundation by following the ASTM D5333-03 calculation procedure and the measured collapse strains at the same stresses from other oedometer tests. The estimated strain approach mostly overestimated the measured collapse strains.
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Marei, M.G., Abdelaziz, T.M., Ragheb, A.M., Ali, N. (2019). A Proposed Approach for Calculating Collapse Settlement. In: Hoyos, L., McCartney, J. (eds) Novel Issues on Unsaturated Soil Mechanics and Rock Engineering. GeoMEast 2018. Sustainable Civil Infrastructures. Springer, Cham. https://doi.org/10.1007/978-3-030-01935-8_6
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