Influence of cyclic deviator stress and consolidation degree on permanent strain of “under-consolidated” marine sediment

Zhu, Weihao; Wang, Jun; Zhuang, Heng

doi:10.1080/1064119x.2022.2098888

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…Geotechnical in situ tests have become an effective method for determining geotechnical design parameters [14,15]. Nevertheless, due to the limited permeability of soft marine clay, the foundation treatment only results in the formation of a solid soil layer on top, while the underlying layer of soft marine clay remains incompletely consolidated, referred to as an underconsolidated condition [1,[6][7][8][9][10][11][12][13]. During the consolidation of a compressible foundation layer under consolidation, residual excess pore water pressures are present, which result from previous loads or self-weight.…”

Section: Introductionmentioning

confidence: 99%

Influence of Penetration Rate on Full-Flow Penetrometer Resistance in Underconsolidated Clay

Qiao,

Liu,

Zhou

et al. 2024

JMSE

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In the past few years, offshore site investigations have extensively utilized full-flow penetrometers like the Ball and T-bar penetrometers to assess penetration resistance and subsequently analyze the strength characteristics of marine clay. The relationship between penetration rate and the measured resistance to penetration and shear strength in clays has been extensively documented through full-flow penetration tests. Although previous studies have shown empirical correlations between undrained shear strength and penetration resistance, the resistance factor utilized in these correlations is typically suggested for cohesive soils that are overconsolidated or normally consolidated, rather than underconsolidated soils. The effects of penetration rate undrained penetration resistances in underconsolidated marine clay are investigated in this study by considering the outcomes of variable rate penetration testing and twitch penetration testing using full-flow penetrometers in laboratory model tests. The discussion focuses on penetration resistances depending on the normalized velocity of the full-flow penetrometers (Ball and T-bar).

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