Small strain stiffness of carbonate Kenya Sand

Fioravante, Vincenzo; Giretti, Daniela; Jamiolkowski, Michele

doi:10.1016/j.enggeo.2013.04.006

Cited by 49 publications

(23 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This response of G max is the opposite of that reported by other researchers (e.g. Fioravante et al 2013 andZeng &Ni 1998) for saturated soils where G max during unloading was higher than during loading at a given stress. For a saturated soil, at a given stress level, G max depends reversely on the void ratio (Hardin 1978;Richart et al 1970;Vucetic and Dobry 1991), therefor, the plastic volume change accumulated during a loading-unloading cycle results in higher values of G max during unloading.…”

Section: Variations Of Effective Dynamic Mass Density During Loading-contrasting

confidence: 91%

Impacts of Drying-Wetting and Loading-Unloading Cycles on Small Strain Shear Modulus of Unsaturated Soils

2019

View full text Add to dashboard Cite

The small strain shear modulus (G max) is an important parameter in geodynamic problems. In order to predict G max of unsaturated soils which are normally subjected to complex drying, wetting processes, effect of hydraulic hysteresis needs to be evaluated. Although several equations have been proposed in recent years, limitations still exist, requiring more research studies in this field. In this study, G max was investigated in a multi-stage test during several drying-wetting cycles and a loading-unloading cycle of net stress. The results revealed four key factors that directly influence the magnitude of G max : the void ratio, the net stress, matric suction and degree of saturation. While variations of the void ratio, net stress, and matric suction cause persistent responses of G max (i.e. if all other factors remain unchanged, G max would then be reversely proportional to the void ratio and directly proportional to the net stress and matric suction) , variations in the degree of saturation result in different responses. A decrease in the degree of saturation may induce a reduction or growth of G max since on the one hand it reduces the effect of matric suction, while on the other hand it increases the total effect of van der Waals attractions and electric double layer repulsions. At the same stress state, a reverse trend, induced by an increase in the degree of saturation, will occur with a growth in the effect of matric suction Void ratio Void ratio function Maximum small strain shear modulus k Material constant Propagation distance

show abstract

Section: Variations Of Effective Dynamic Mass Density During Loading-contrasting

confidence: 91%

Impacts of Drying-Wetting and Loading-Unloading Cycles on Small Strain Shear Modulus of Unsaturated Soils

2019

View full text Add to dashboard Cite

show abstract

“…In light of peculiar aspects of the stress-strain behaviour of the soil investigated on this project, the primary objective of this paper is to provide a comprehensive data set on mechanical properties of a crushable, carbonate sand. Thorough treatment of the mechanical properties of these sands is limited in the technical literature; however, useful background and data have been presented by the following investigators: Fookes (1988), Golightly (1988), Golightly & Hyde (1988), Coop (1990), Coop & Atkinson (1993), Coop & Cuccovillo (1998), Coop et al (2004), Coop & Airey (2003), Fioravante et al (1994aFioravante et al ( , 1994bFioravante et al ( , 1998Fioravante et al ( , 2013, Qadimi & Coop (2007), Al-Douri & Poulos (1991), Hyodo et al (1998), Mao & Fahey (2003), Porcino et al (2008) and Van Impe et al (2015). Publications such as ISO 19901-4 (ISO, 2016) are applicable to siliceous sands and provide warnings to the effect that 'carbonate sands are different and need special expertise'.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of a carbonate sand from a dredged hydraulic fill

Giretti¹,

Fioravante

Been

et al. 2018

Géotechnique

Self Cite

View full text Add to dashboard Cite

This paper focuses on the properties of a crushable, uncemented, carbonate sand, retrieved from an artificial island to be used for petroleum production offshore of the United Arab Emirates. The sand was dredged from an offshore borrow area, placed hydraulically within engineered bunds to create the island and densified by vibroflotation. The results of a comprehensive laboratory testing programme are summarised in this paper, providing a set of mechanical properties for carbonate sand. The laboratory programme included static, cyclic and dynamic tests, the results of which are interpreted in a critical state soil mechanics framework, including stress dilatancy. The results of this testing programme contribute to on-going research on the behaviour of carbonate sands under static and cyclic loading conditions. The results are also compared with selected data for other carbonate and siliceous sands, and highlight the behaviour of crushable, carbonate sands used as hydraulic fills.

show abstract

“…Additionally, Jovicic and Coop (1998) (4)) (Bellotti et al 1996;Fioravante et al 2013;Roesler 1979;Santamarina et al 2001;Yu and Richart 1984). Consequently, in cases where the direction of wave propagation is parallel to the vertical or horizontal major axis, shear wave velocities can be determined in three different directions (V s (VH), V s (HV), and V s (HH)) and measured as a function of consolidation loading and unloading in order to yield insight into the stiffness anisotropy of soils.…”

Section: Stiffness Anisotropymentioning

confidence: 98%