Effect and mechanism of fines content on the shear strength of calcareous sand

Shen, Jing; Wang, Xing; Yao, Ting; Wei, Houzhen; Zhu, Changqi

doi:10.1007/s10064-021-02398-w

Cited by 31 publications

(5 citation statements)

References 70 publications

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“…Therefore, the amount of fiber incorporated should be considered in an actual project to achieve the best reinforcement effect. The effective confining pressure is another important factor affecting the shear strength of sand [61]. As shown in Figure 8, when the fiber content and length were the same, the peak stress of the basalt fiber-reinforced sea sand increased with an increase in the effective confining pressure.…”

Section: Test Programmentioning

confidence: 99%

Analysis of basalt fiber reinforcement on static shear properties of Beibu Gulf sea sand

Wang,

He,

Tang

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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Basalt fibers are a reinforcing material with excellent mechanical properties and durability. In contrast, although Beibu Gulf sea sand is widely in engineering, it exhibits low strength and poor stability, which can be improved by adding basalt fibers. In this study, the effects of fiber content, fiber length, and effective confining pressure on the static shear strength of fiber-reinforced sea sand were investigated using a triaxial shear test. The maximum improvement on the static shear characteristics and deformation resistance of sea sand were achieved for a fiber content and length of 0.8% and 12 mm, respectively. The cohesion and internal friction angle of sea sand were improved and the secant modulus and strain before and after basalt fiber reinforcement showed a nonlinear attenuation tendency. The reinforcement effect coefficient R and the basalt fiber content under different dosages were in accordance with the law of the Gaussian function. The value of R conformed to a linear growth and exponential function law under different fiber lengths and effective confining pressures, respectively. This study provides a solid theoretical basis for the sustainable utilization of sea sand resources and fiber reinforcement for road and coastal protection engineering in the Beibu Gulf region.

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Section: Test Programmentioning

confidence: 99%

Analysis of basalt fiber reinforcement on static shear properties of Beibu Gulf sea sand

Wang,

He,

Tang

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…Fine particles are defined as particles with grain diameters smaller than 0.075 mm, and the specimens are prepared by blending coarse particles with grain diameters larger than 0.075 mm at different ratios. Based on the results of the field sampling and screening experiments, the content of fine particles with a grain diameter of less than 0.075 mm does not exceed 40% in most of the dredge-fill foundations [16]. Therefore, two fine particle contents (20% and 40%) were selected in the present study.…”

Section: Materials Propertiesmentioning

confidence: 99%

Stress stress-strain behavior of hydraulic filled coral sand subjected to internal erosion

Ding,

Wang,

Wen

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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Coral sand foundations lose fine particles under the action of groundwater infiltration. As the soil skeleton structure deteriorates, the foundation becomes uneven and may even collapse. In this study, a triaxial drainage shear test of coral sand is used as a quantitative control method for the loss of fine particulate soil, and the effect of internal erosion on the mechanical behavior of coral sand is evaluated. An experiment is used to demonstrate that erosion leads to a decrease in the peak shear strength and residual strength of coral sand. Erosion has different effects on coral sand with different fine particle contents, and the effects on the friction angles of coral and terrestrial sand are also different. The secant modulus E50 and peak secant modulus Ep gradually decrease as the loss of fine particles increases. The effect of fine particle loss on the peak secant modulus Ep is significant at fine-particle losses exceeding 10% for a fine-particle content of 20%. The loss of fine particles creates new pore spaces in the coral sand, which, in turn, affects the stability of the original soil skeleton. Erosion has been shown to have an effect on the gradational features of coral sand, leading to the phenomenon that the dilatancy effect increases as a function of the amount of erosion that takes place. To prevent uneven foundation settlement caused by subsurface erosion in engineering designs, it is important to consider the gradation characteristics and fine particulate content of coral sand, which affect the stability of coral reef foundations.

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“…The shear characteristics of calcareous sand have been extensively studied; it has been observed that particle gradation (Hassanlourad et al, 2014;Rezvani et al, 2021), confining pressure (Fahey, 2021), and particle breakage (Jingping et al, 1997;Zhang and Luo, 2020) have an impact on the shear strength of calcareous sand. For particle gradation, significant attention has been paid to the influence of particle size (Bagherzadeh-Khalkhali and Mirghasemi, 2009;Kuang et al, 2021), uniformity coefficient , average particle size (Giang et al, 2017;Wang et al, 2017b), fine particle content (Shen et al, 2021), and particle group content (Ata et al, 2018;Shen et al, 2018;Fan et al, 2021) on the shear strength of calcareous sand. carried out triaxial shear tests to study the effect of gradation on the particle breakage and mechanical properties of coral sand.…”

Section: Open Access Edited Bymentioning

confidence: 99%

Coal and rock dynamic disasters: Advances of physical and numerical simulation in monitoring, early warning, and prevention

2024

Frontiers Research Topics

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Frontiers is more than just an open access publisher of scholarly articles: it is a pioneering approach to the world of academia, radically improving the way scholarly research is managed. The grand vision of Frontiers is a world where all people have an equal opportunity to seek, share and generate knowledge. Frontiers provides immediate and permanent online open access to all its publications, but this alone is not enough to realize our grand goals. Frontiers journal seriesThe Frontiers journal series is a multi-tier and interdisciplinary set of openaccess, online journals, promising a paradigm shift from the current review, selection and dissemination processes in academic publishing. All Frontiers journals are driven by researchers for researchers; therefore, they constitute a service to the scholarly community. At the same time, the Frontiers journal series operates on a revolutionary invention, the tiered publishing system, initially addressing specific communities of scholars, and gradually climbing up to broader public understanding, thus serving the interests of the lay society, too. Dedication to qualityEach Frontiers article is a landmark of the highest quality, thanks to genuinely collaborative interactions between authors and review editors, who include some of the world's best academicians. Research must be certified by peers before entering a stream of knowledge that may eventually reach the public -and shape society; therefore, Frontiers only applies the most rigorous and unbiased reviews. Frontiers revolutionizes research publishing by freely delivering the most outstanding research, evaluated with no bias from both the academic and social point of view. By applying the most advanced information technologies, Frontiers is catapulting scholarly publishing into a new generation. What are Frontiers Research Topics?Frontiers Research Topics are very popular trademarks of the Frontiers journals series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area.

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Effect and mechanism of fines content on the shear strength of calcareous sand

Cited by 31 publications

References 70 publications

Analysis of basalt fiber reinforcement on static shear properties of Beibu Gulf sea sand

Analysis of basalt fiber reinforcement on static shear properties of Beibu Gulf sea sand

Stress stress-strain behavior of hydraulic filled coral sand subjected to internal erosion

Coal and rock dynamic disasters: Advances of physical and numerical simulation in monitoring, early warning, and prevention

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