Experimental study on base pressure distribution of accumulations of granular materials

被引：0

作者：

Wang, Ziyuan ^{[1
]}

Mo, Pinqiang ^{[1
,2
]}

Hu, Jing ^{[2
]}

Zhao, Zilu ^{[1
]}

Xiao, Qiong ^{[3
]}

机构：

[1] School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou

[2] State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou

[3] Anhui University of Science and Technology, College of Architecture, Chuzhou

来源：

Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2024年 / 46卷

关键词：

accumulation; base pressure; point deposition method; stress depression ratio;

D O I：

10.11779/CJGE2024S10020

中图分类号：

学科分类号：

摘要：

Addressing the issue of pressure reduction in accumulations of granular materials, the impact of varying funnel heights, particle sizes and particle shapes on the distribution of base pressure is investigated utilizing the point deposition method. The results show that the phenomenon of base pressure reduction is intricately linked to the formation of internal stress arches and influenced by the factors such as the height of the funnel, granulometry of the particles, and morphological characteristics of the granules. With the increase of the accumulations, there is an enhancement in the stability of the stress arches, leading to a convergence towards a steady state of the stress depression ratio. The base pressure measured increases with the increase of the vertical distance from the funnel to the apex of the accumulations, resulting in a decrease of the stress depression. The stress depression ratio within the accumulations exhibits a trend of the initial increase followed by a decrease as the particle size escalates, with a notable occurrence of stress concentration in the accumulations comprised of particles ranging from 0.6 to 1.18 mm in diameter. With the increase in the mass of the accumulations, the stress depression ratio for the standard sand samples initially increases and then decreases, whereas for the loose coal particles, a consistent decline is observed. © 2024 Chinese Society of Civil Engineering. All rights reserved.

引用

页码：158 / 163

页数：5

共 5 条

[1]

NORMAN D, COLIN K., 125 question: what don't we konw?, Science, 309, 5731, (2005)

[2]

LU Kunquan, LIU Jixing, Particulate Matter Traffic Flow and Particle Flow, (2004)

[3]

ROTTER J, AI J, OOI J, Et al., Progressive pressure measurements beneath a granular pile with and without base deflection, Structures and Granular Solids, pp. 87-92, (2008)

[4]

QIONG X., The Loading Path Dependence of Sand Constitutive Behaviour and Its Relationship with Pressure Dip in Sand Piles, (2017)

[5]

VANEL L, HOWELL D, CLARK D, Et al., Memories in sand: experimental tests of construction history on stress distributions under sandpiles, Physical Review E, 60, 5, pp. 5040-5043, (1999)

← 1 →