Post-cyclic volumetric strain of calcareous sand using hollow cylindrical torsional shear tests

Shahnazari, Habib; Rezvani, Reza; Tutunchian, Mohammad Amin

doi:10.1016/j.soildyn.2019.05.030

Cited by 33 publications

(4 citation statements)

References 26 publications

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“…Coral sand is formed by the deposition of marine biological debris, and its main component is calcium carbonate. The mechanical properties of coral sand are totally different from that of terrigenous quartz sand [4][5][6][7]. For example, its particles are irregular in shape and easy to break under external load.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Estimation Studies of Resilient Modulus of Marine Coral Sand under Cyclic Loading

Zhang

Ding

et al. 2020

JMSE

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Coral sand is an important filler resource that can solve the shortage of terrestrial fillers in coastal areas. Recently, the foundations of many infrastructures in the South China Sea have been built with coral sand as fillers, which have been subjected to wave and traffic cyclic loads. Resilient modulus (Mr) is an important design parameter in marine engineering, but there are few studies on the resilient modulus response of coral sand under cyclic loading. A series of drained cyclic triaxial tests were carried out to investigate the effects of the initial mean effective stress (p0) and cyclic stress ratio (ζ) on the resilient modulus response of the coral sand from the South China Sea. The change of fractal dimension (αc) can reflect the rule of particle breakage evolution. The αc of coral sand shows a tendency of almost maintaining stable and then increasing rapidly with the increase of mean effective stress p0 under each cyclic stress ratio ζ. There is a threshold of p0, when the p0 exceeds this threshold, αc will increase significantly with the increase of p0. The increase of p0 has a beneficial effect on the improvement of the Mr, while the increase of ζ has both beneficial and detrimental effects on the improvement of the Mr. A new prediction model of the Mr considering particle breakage was established, which can better predict the Mr of coral sand in the whole stress interval. The research results can provide guidance for the design of marine transportation infrastructures, which can promote the development of marine transportation industry and energy utilization.

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Section: Introductionmentioning

confidence: 99%

Experimental and Estimation Studies of Resilient Modulus of Marine Coral Sand under Cyclic Loading

Zhang

Ding

et al. 2020

JMSE

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“…is is likely due to the calcareous sand involving many edges and irregularly shaped particles, which leads to a higher bite friction between the sand grains than that between the grains of the siliceous sand; this is the same as the literature [13][14][15][16][17][18][19][20]26]. is effect is more prominent in a loose state.…”

Section: Comparison Of the Cyclic Strengths Of Calcareous Andmentioning

confidence: 60%

“…In addition, research on the volume deformation of calcareous sand has also been discussed. Shahnazari et al [26] pointed out that the relative density, effective confining pressure, dynamic stress ratio, pore pressure ratio, and maximum shear strain were related to the postcyclic volumetric strain of calcareous sand, and the maximum shear strain was the most important factor. Rezvani et al [27] studied how physical properties of soil particles play a key role in the mechanical behavior of deposits and provided an estimation method of volume settlement after sand circulation in Hormuz Island.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Liquefaction Properties and Post‐Liquefaction Volumetric Strain of Calcareous Sand in Dredger Fill Site

Zhao

Jiang

et al. 2020

Advances in Civil Engineering

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In this study, dynamic triaxial cyclic tests were conducted to examine the liquefaction properties and post-liquefaction volumetric strain of calcareous sand from a dredger fill site in the midst of the islands and reefs of the South China Sea. The test results indicated that there were some differences in micromorphology and composition between the calcareous sand obtained via dredging and natural calcareous sand. Axial cyclic stress attenuation can lead to higher cyclic vibration than actual liquefaction vibration, and the modified method can eliminate the effect of axial cyclic stress attenuation. Saturated calcareous sand liquefies under undrained and cyclic loading conditions, and the liquefaction resistance of the calcareous sand decreases with an increase of the effective confining pressure in the dense state. Calcareous sand obtained via dredging exhibited a higher liquefaction resistance compared with other types of calcareous sand. Furthermore, the proposed pore pressure development modified model better describes the pore pressure growth of the calcareous sand from the filling site. The fitting parameters of this model exhibited a high correlation with the relative density. Moreover, the post-liquefaction volumetric strain of the calcareous sand is larger than that of quartz sand, exhibiting a linear relationship with relative density.

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“…Seismic damages in Guam (1993), Hawaii (2006), and Haiti (2010 have demonstrated the significance of studying these deposits. The cyclic behavior of calcareous deposits has been studied by Hyodd et al (1998), Nanda et al (2018), Shahnazari et al (2019), He et al (2020), andRezvani et al (2020), among others. Moreover, many researchers, including Yasufuku and Hyde (1995), Kuwajima et al (2009), andWu et al (2013), have investigated the influence of these soils on the bearing capacity of piles.…”

Section: Introductionmentioning

confidence: 99%

Crushability and compressibility of carbonate and siliceous sands in the one-dimensional oedometer test

2021

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Carbonate sediments are originated from the skeletal remains of marine organisms, which are abundantly situated at the tropical and petrochemical reservoir in Australia, India, the North Sea coasts, and the Persian Gulf. The different behavior of carbonate remains in comparison to siliceous soils has attracted attention among researchers. Crushability is a significant feature of carbonate sands which leads to changes in particle size distribution at high pressures and causes enormous damage to structures. This study aims to evaluate the compressibility of Hormuz Island carbonate sand and compare it to the Chamkhaleh Beach siliceous sand through one-dimensional compression tests in a pneumatic oedometer apparatus. Experiments were subjected to overburden pressures up to 2 MPa, and grain crushing was measured after each experiment. Results illustrated that particle crushing in the Hormuz Island sand impacted its compressibility and led to an abrupt increase in strain and settlement.

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Post-cyclic volumetric strain of calcareous sand using hollow cylindrical torsional shear tests

Cited by 33 publications

References 26 publications

Experimental and Estimation Studies of Resilient Modulus of Marine Coral Sand under Cyclic Loading

Experimental and Estimation Studies of Resilient Modulus of Marine Coral Sand under Cyclic Loading

Experimental Investigation of the Liquefaction Properties and Post‐Liquefaction Volumetric Strain of Calcareous Sand in Dredger Fill Site

Crushability and compressibility of carbonate and siliceous sands in the one-dimensional oedometer test

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