Responses of calcareous sand foundations to variations of groundwater table and applied loads

Cao, Dengqing; Shukla, Sanjay Kumar; Yang, Linqing; Guo, Chengchao; Wu, Jiashou; Wang, Fuming

doi:10.1016/j.jrmge.2021.08.003

Cited by 16 publications

(2 citation statements)

References 37 publications

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“…By conducting triaxial shear tests on calcareous sand under different axial strains, Wang et al [33] concluded that the particle breakage quantity of calcareous sand increased at a gradually decreasing rate with increasing axial strain and continued to increase even after reaching peak deviatoric stress. Moreover, over the past few decades, researchers have explored the mechanical characteristics and particle breakage evolution of coral sand using ring shearing tests [34], alongside triaxial tests [35][36][37] and model experiments [38,39]. However, changes in experimental methods have not resulted in a comprehensive understanding of the calcareous sand breakage mechanism.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Confined Breakage Characteristics of Calcareous Sand in the South China Sea Integrated Using Relative Breakage Ratio and Fractal Dimension

Zhu,

Zheng,

Yang

2024

Sustainability

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Calcareous sand, ubiquitous in the geotechnical makeup of the South China Sea, exhibits both compressibility and vulnerability to fragmentation when subjected to external loading, spanning a spectrum from typical to extreme conditions. This investigation aims to quantitatively assess the compression and particle breakage characteristics of calcareous sand under varied parameters, including relative density, saturation, applied loads, and loading paths, specifically focusing on sustainable geotechnical methodologies. Through a series of confined compression tests, this evaluation employed the relative breakage ratio and fractal dimension as key evaluative metrics. The results indicated that employing this integrated approach offered a more comprehensive understanding of calcareous sand breakdown mechanisms than relying on a singular particle breakage index. Furthermore, an increase in relative density can induce a transition in particle contact behavior, shifting from point-to-point interactions to face-to-face contact, thereby reducing inter-particle stress and minimizing grain breakage, particularly under loads below 200 kPa. Increasing loads exacerbated particle breakage, with finer particles predominantly initiating this process. During reloading, pore ratios across various load levels surpass those observed during initial loading, except at 1600 kPa, where a decline in pore ratio was noted, coinciding with pore water extrusion and the onset of new particle fracturing. The lubricating effect of water reduces inter-particle friction, enhancing stress concentration at particle edges and localized particle breakage, thereby increasing the presence of finer particles without significantly altering the overall structure. Notably, the influence of pore water pressure is evident during the reloading phase. These findings contribute to a refined theoretical framework for predicting coastal erosion risks and devising effective environmental protection strategies for sustainable coastal engineering practices.

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Section: Introductionmentioning

confidence: 99%

Investigation on the Confined Breakage Characteristics of Calcareous Sand in the South China Sea Integrated Using Relative Breakage Ratio and Fractal Dimension

Zhu,

Zheng,

Yang

2024

Sustainability

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“…On the other hand, The sand particles weren't returned same as the initial shape as the increasing of the friction angle (Cao. D et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

The numerical model of the Internal friction angle and Saturation Degree affect the vertical displacement of the ground

Doan¹

2022

Preprint

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The numerical model of the different vertical displacement and the internal friction angle variations were determined carefully by the Viet Nam Standard. The difference between experimental values and simulation of the PLAXIS 3D software, was shown remarkably as the maximum value was shown in 0.01975 m (z = -36.9m) depth with ϕ0 = 290); whereas the minimum value in 0.002844 m (z = 0m) depth with ϕ0 = 20. The mean value at the center of the Clay layer (from 0.0m to 27.0m) depth was obtained at 0.0577m whereas compared with 0.0156 m at the Sand layer (from 27.0 to 39.6m) depths. Moreover, water content (W%) and porosity (P%) were calculated particularly at the maximum value of 94.35% (borehole “HK 2”) with 4.8m depth, whereas the minimum value is 18.22% at 39.3m depth (borehole “HK3”); which compared with porosity (P%) of 71.9% (borehole “HK2”) at 4.8m depth, and 40.4% (borehole “HK3”) at 4.8m depth. On the other hand, Saturation results presented a relatively low mean value of 88.09% and 86.79% at the center of the ground (from 4.3m to 15.3m). The increase of 23% and 75.42% (from 18.3m to 39.3m) as compared with the research of Zapatata, 1999.

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Analysis of the effect of breakable particle corners on uplift pile–soil interaction behaviors in calcareous sand

Peng,

Yin,

Yang

et al. 2024

Acta Geotech.

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Responses of calcareous sand foundations to variations of groundwater table and applied loads

Cited by 16 publications

References 37 publications

Investigation on the Confined Breakage Characteristics of Calcareous Sand in the South China Sea Integrated Using Relative Breakage Ratio and Fractal Dimension

Investigation on the Confined Breakage Characteristics of Calcareous Sand in the South China Sea Integrated Using Relative Breakage Ratio and Fractal Dimension

The numerical model of the Internal friction angle and Saturation Degree affect the vertical displacement of the ground

Analysis of the effect of breakable particle corners on uplift pile–soil interaction behaviors in calcareous sand

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