干旱区生态环境知识资源中心(Arid): Geotechnical characterization of collapsible salty sands subjected to monotonic and cyclic loadings-A case study for areas with high seismicity

Arid

DOI	10.1016/j.sandf.2022.101252
	Geotechnical characterization of collapsible salty sands subjected to monotonic and cyclic loadings-A case study for areas with high seismicity
	Macedo, Jorge; Sotelo, Gavi; Orellana, Susana; Vergaray, Luis; Liu, Fangzhou; Jaffal, Hamza; El Mohtar, Chadi
通讯作者	Macedo, J
来源期刊	SOILS AND FOUNDATIONS
ISSN	0038-0806
EISSN	2524-1788
出版年	2023
卷号	63 期号:1
英文摘要	Collapsible soils are typically found in arid regions and often have an aeolian or alluvial origin. In their natural states, they may have a low moisture content and cemented structure that can contribute to high strength and stiffness; however, wetting or saturation can reduce the strength and stiffness due to loss of the cementation. This paper presents a geotechnical characterization of collapsible salty sands in the highly seismic southern coast of Peru, which makes the characterization of their dynamic properties and expected response to earthquake-induced demands (e.g., liquefaction) of primary importance. The geotechnical characterization was performed on intact and remolded samples utilizing various field and laboratory tests, including oedometer, direct shear, static triaxial, cyclic direct simple shear, torsional resonant column, plate loading, and MASW tests. The results revealed insights on the geotechnical properties and mechanical response of collapsible soils and the effects of salt cementation. The results indicated: 1) a decreasing brittle and collapsible behaviors with decreasing cementation while maintaining consistent post-collapse residual strength; 2) oedometer and in situ plate load-ing tests showed a sudden increase in deformations once cementation is broken; 3) higher dilation potential of collapsible soils as com-pared to natural sands; 4) decrease in the maximum shear modulus due to the loss of cementation; 5) increase in the stress dependence of the maximum shear modulus with loss of cementation; and 6) a higher resistance to liquefaction for the collapsible soils, even after wash-ing, as compared to natural sands, which may be ascribed to the more pronounced dilation potential.(c) 2023 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
英文关键词	Collapsible soils Brittleness Static and cyclic strength Salt cementation Dynamic properties Dilation potential
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000925492000001
WOS关键词	VOLUME CHANGE ; LOESS ; BEHAVIOR ; SOILS ; MICROSTRUCTURE ; COMPACTION ; MECHANISM ; STRENGTH ; CHINA
WOS类目	Engineering, Geological ; Geosciences, Multidisciplinary
WOS研究方向	Engineering ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/398680
推荐引用方式 GB/T 7714	Macedo, Jorge,Sotelo, Gavi,Orellana, Susana,et al. Geotechnical characterization of collapsible salty sands subjected to monotonic and cyclic loadings-A case study for areas with high seismicity[J],2023,63(1).
APA	Macedo, Jorge.,Sotelo, Gavi.,Orellana, Susana.,Vergaray, Luis.,Liu, Fangzhou.,...&El Mohtar, Chadi.(2023).Geotechnical characterization of collapsible salty sands subjected to monotonic and cyclic loadings-A case study for areas with high seismicity.SOILS AND FOUNDATIONS,63(1).
MLA	Macedo, Jorge,et al."Geotechnical characterization of collapsible salty sands subjected to monotonic and cyclic loadings-A case study for areas with high seismicity".SOILS AND FOUNDATIONS 63.1(2023).