Cyclic undrained behavior and post liquefaction settlement of a nonplastic silt

Karakan, Eyyüb; Tanrınıan, Nazar; Sezer, Alper

doi:10.1016/j.soildyn.2019.01.040

Cited by 39 publications

(11 citation statements)

References 38 publications

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“…Landslides represent a significant natural hazard, and the progressive disaster mode of shallow landslides poses considerable risks to human life and properties [1,2]. Landslides are triggered by various factors, including seismic activity, rainfall, and irrigation, among others [3][4][5][6][7]. Earthquake-induced landslides, in particular, are typically rapid events, offering little to no time for survival [8,9] Rainfall-induced landslides, on the other hand, are a global phenomenon [10,11].…”

Section: Introductionmentioning

confidence: 99%

Rainfall- and Irrigation-Induced Landslide Mechanisms in Loess Slopes: An Experimental Investigation in Lanzhou, China

Liu,

Bai,

Sun

et al. 2024

Atmosphere

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To reveal the mechanism of rainfall- and irrigation-induced landslides in loess slopes within cold regions, a series of tests on loess samples subjected to different permeability durations were conducted, and the effects of rainfall on several performance indicators, including the permeability coefficient, composition, microstructure, soil–water characteristic curve, and the shear strength of the loess, were investigated. The results show that the permeability coefficient of the loess decreased by 68% after permeability testing. With increased permeability duration, there is a marked decrease in total dissolved solids, sand particles, and clay particles, contrasted with an increase in silt particles. This dynamic alters the original soil structure and impacts the soil–water characteristic curve of the loess. Additionally, rainwater infiltration heightens the effective saturation of the loess, in turn diminishing the shear strength of the loess as effective saturation increases. This reduction in shear strength is further intensified with extended infiltration time (or rainfall duration). A landslide is triggered once the shear strength diminishes to the level of the geostatic stress of the loess slope, and the influence of the rainfall-induced loss of soil shear strength should be taken into account during slope stability analysis. This study enhances the understanding of the initiation mechanisms of rainfall-induced landslides in loess slopes.

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Section: Introductionmentioning

confidence: 99%

Rainfall- and Irrigation-Induced Landslide Mechanisms in Loess Slopes: An Experimental Investigation in Lanzhou, China

Liu,

Bai,

Sun

et al. 2024

Atmosphere

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“…However, following numerous field observations that sands with some amount of silt and/or clay and silt can also liquefy when subjected to seismic loading, many researchers have extended their interest in elucidating the role of fines in the response of sandy soils. These studies concluded that the type and plasticity of fines and fine content were important factors influencing the liquefaction behavior of sand-silt or sand-clay mixtures [12]- [17]. The analysis of case histories and experimental studies provided conclusive evidence that loose deposits of sandy soils suffer larger volumetric compaction during cyclic loading, generating higher excess pore pressures.…”

Section: Introductionmentioning

confidence: 99%

Gerilme Kontrollü Dinamik Üç Eksenli Deneyler ile Temiz Kumun Sıvılaşma Davranışının Belirlenmesi

Zeybek

2022

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

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Gevşek halde bulunan kohezyonsuz zeminler, sismik yükler altında ön veya tam sıvılaşmaya maruz kalarak önemli yapısal hasara neden olabilmektedir. Geoteknik deprem mühendisliğinde, kumlu zeminlerin sıvılaşma davranışı, genellikle drenajsız koşullarda gerçekleştirilen gerilme kontrollü döngülü laboratuvar deneyleri ile belirlenmektedir. Bu çalışmada, yeniden oluşturulmuş doymuş temiz kum numuneleri üzerinde bir dizi gerilme kontrollü dinamik üç eksenli testler gerçekleştirilmiştir. Farklı rölatif sıkılıkta (%38 - 90) hazırlanmış numuneler 0.1 Hz veya 1 Hz yükleme frekansına ve farklı tekrarlı gerilme genliği oranına (CSR) sahip gerilmelere maruz bırakılmıştır. Benzer rölatif sıkılık ve tekrarlı gerilme genliği oranı ile farklı yükleme frekansında (0.1 Hz ve 1 Hz) gerçekleştirilen deneylerde, sıvılaşmaya neden olan çevrim sayısının 1 Hz yükleme frekans değerinde daha faza olduğu görülmüştür. Bu sonuç, kum numunelerinin yüksek yükleme frekanslarında daha yüksek sıvılaşma mukavemetine sahip olduğunu göstermektedir. Ayrıca, döngüsel yükleme frekansından bağımsız olarak, artan relatif sıkılığın kum numunelerinin sıvılaşma direncini önemli derecede artırdığı tespit edilmiştir.

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“…Many scholars investigated the phenomenon and significant results were achieved (e.g. Liu 3 , Chen et al 4 , Karakan et al 5 and Yang and Sze 6 , among many others). For many years, the phenomenon of liquefaction was thought to be only limited to sands.…”

Section: Introductionmentioning

confidence: 99%

The correction factor of Monterey No. 0/30 sample with fines content liquefaction resistance between cyclic triaxial and cyclic hollow cylinder tests

Liu

Chen

2022

Sci Rep

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Soil liquefaction is one of the most detrimental forms of earthquake-induced ground failure that can result in catastrophic damage to engineering structures. For the seismic safety evaluation of foundations and high-rise structures, it is the most critical way to assess liquefaction resistance. In this paper, an array number of isotropically consolidated undrained cyclic triaxial tests (CTT) and cyclic hollow cylinder tests (CHCT) have been performed to evaluate soil liquefaction resistance. Thirty-seven isotopically consolidated undrained cyclic triaxial tests and thirty-seven cyclic hollow cylinder tests were run on the uniform medium Monterey No. 0/30 sand and it is with four different percentages of fine content. By using cyclic triaxial and cyclic hollow cylinder tests for evaluating liquefaction resistance, it helps us better understand the relationship between two types of tests on uniform clean Monterey No. 0/30 sand and soil sample with five different percentages of fines content. Four different relative densities of 30%, 45%, 50%, and 60%, two confining pressure of 103 kpa and 207 kpa, and five cyclic stress ratios (0.15, 0.2, 0.25, 0.3, and 0.4) have been used for a series of cyclic triaxial tests and cyclic hollow cylinder tests. At the same relative densities of 30% and 60%, the correction factor between CTT and CHCT evaluated ranged from 0.46 to 0.63 on the uniform clean Monterey No. 0/30 sand. Statistical analyses were performed to formulate functional relationships for predicting the correction factor of soil liquefaction resistance between CTT and CHCT tests.

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Cyclic undrained behavior and post liquefaction settlement of a nonplastic silt

Cited by 39 publications

References 38 publications

Rainfall- and Irrigation-Induced Landslide Mechanisms in Loess Slopes: An Experimental Investigation in Lanzhou, China

Rainfall- and Irrigation-Induced Landslide Mechanisms in Loess Slopes: An Experimental Investigation in Lanzhou, China

Gerilme Kontrollü Dinamik Üç Eksenli Deneyler ile Temiz Kumun Sıvılaşma Davranışının Belirlenmesi

The correction factor of Monterey No. 0/30 sample with fines content liquefaction resistance between cyclic triaxial and cyclic hollow cylinder tests

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