Statistics-based method for determination of drag coefficient for nonlinear porous flow in calcareous sand soil

Ye, Jianhong; Zaohui, Zhang,; Shan, Jipeng

doi:10.1007/s10064-018-1330-6

Cited by 23 publications

(3 citation statements)

References 9 publications

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“…Generally, the calcium carbonate content in calcareous sand is greater than 50%, and calcareous sand is widely distributed along continental shelves and coastlines within N30°-S30°latitude (Anggraini et al, 2017;Nurul et al, 2019). Calcareous sand has been discovered on coral reefs in the South China Sea (Shen et al, 2017;Ye et al, 2019;Yu et al, 2020). Recently, a large-scale reclamation of island-reefs has been carried out using calcareous sands as the filling material (Wang et al, 2019a;2019b).…”

Section: Introductionmentioning

confidence: 99%

SWCC of Calcareous Silty Sand Under Different Fines Contents and dry Densities

Shen

Ming-jian

Wang

et al. 2021

Front. Environ. Sci.

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Investigating the soil-water characteristics of calcareous soil has a great significance for preventing geological disasters on island-reefs as well as maintaining the foundation stability of hydraulic-filled island-reefs. In this study, calcareous silty sands with different fines contents and dry densities were studied to reveal their effects on the soil-water characteristics of calcareous soil on hydraulic-filled island-reefs. The soil-water characteristic curve (SWCC) of the calcareous silty sand was measured using a pressure plate apparatus. Taking into account the porous meso-structure, the effects of fines content and dry density on the SWCC of calcareous silty sand were analyzed, and the applicability of existing SWCC models to calcareous silty sand was verified. A SWCC model suitable for assessing soil-water characteristic of calcareous silty sand was proposed. Results of this study provide some reference for quantifying the water-holding capacity of calcareous silty sand.

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Section: Introductionmentioning

confidence: 99%

SWCC of Calcareous Silty Sand Under Different Fines Contents and dry Densities

Shen

Ming-jian

Wang

et al. 2021

Front. Environ. Sci.

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“…Its extensive utilization as a construction filler in island development encompasses a variety of applications, including foundations [4], roadbeds [5], and airport runways [6]. The irregular shapes, dense pore structure, inadequate gradation, and low particle strength collectively contribute to the distinct compression and crushing properties of this material [7][8][9][10][11][12][13][14].…”

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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“…In addition to the Ergun equation, the Forchheimer equation, which adds an inertial term based on the Darcy equation, has also received great attention. Ye et al [12] proposed a statistic-based methodology to determine drag coefficients of calcareous sand soil. Ooi et al [13] presented a model based on the Darcy-Forchheimer law to determine parameters for louvers.…”

Section: Introductionmentioning

confidence: 99%

Determination of the Flow Rate Characteristics of Porous Media Under the Positive Pressure and Vacuum

Wang

et al. 2023

Preprint

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Statistics-based method for determination of drag coefficient for nonlinear porous flow in calcareous sand soil

Cited by 23 publications

References 9 publications

SWCC of Calcareous Silty Sand Under Different Fines Contents and dry Densities

SWCC of Calcareous Silty Sand Under Different Fines Contents and dry Densities

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

Determination of the Flow Rate Characteristics of Porous Media Under the Positive Pressure and Vacuum

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