Details
Original language | English |
---|---|
Article number | 47 |
Number of pages | 16 |
Journal | Granular matter |
Volume | 27 |
Issue number | 3 |
Early online date | 16 Apr 2025 |
Publication status | Published - Jul 2025 |
Abstract
The stress dip, a local minimum in the vertical stress distribution beneath granular piles, has captured the interest of many researchers. Studying stress dips in granite residual soil is of critical importance due to its relevance to engineering projects, soil mechanics, and particle behaviors. The purpose of this study is to confirm the existence of the stress dip in granite residual soil and explore its evolution during accumulation. In this work, granite residual soil conical piles were formed by the localized source piling method in experiments. During the experiment, Teflon film was placed below the piles to hinder the formation of stress dips, while the vertical stress distribution beneath each pile at varying heights was measured to monitor the evolution of stress dips. Besides, DEM simulations were employed to analyze the formation and evolution mechanism of the stress dips. The experimental and simulation results showed that stress dips can be formed in granite residual soil piles, occurring both in the center and locally. Stress dips evolve gradually through accumulation rather than being intrinsic properties of the piles. From a spatial perspective, no clear pattern is observed in the location of the stress dips. Quantitatively, as pile size increases, stress dips become more prevalent throughout the entire scope, although individual dips may dissipate. The normalized analysis of the central stress dip suggests that the normalized stress distribution pattern of the central stress dip is independent of pile size. The formation and evolution of stress dips are influenced by the force chain network, which consists of arch and ring force chains that are promoted by the supporting effect of the base plate and the particle squeezing effect.
Keywords
- DEM, Granite residual soil, Granular piles, Stress dips
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Granular matter, Vol. 27, No. 3, 47, 07.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Study on stress dips in granite residual soil based on experiments and DEM
AU - Chen, Junsheng
AU - Zhang, Bochao
AU - Guo, Lingfeng
AU - Zhang, Heng
AU - Achmus, Martin
AU - Beer, Michael
N1 - Publisher Copyright: © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.
PY - 2025/7
Y1 - 2025/7
N2 - The stress dip, a local minimum in the vertical stress distribution beneath granular piles, has captured the interest of many researchers. Studying stress dips in granite residual soil is of critical importance due to its relevance to engineering projects, soil mechanics, and particle behaviors. The purpose of this study is to confirm the existence of the stress dip in granite residual soil and explore its evolution during accumulation. In this work, granite residual soil conical piles were formed by the localized source piling method in experiments. During the experiment, Teflon film was placed below the piles to hinder the formation of stress dips, while the vertical stress distribution beneath each pile at varying heights was measured to monitor the evolution of stress dips. Besides, DEM simulations were employed to analyze the formation and evolution mechanism of the stress dips. The experimental and simulation results showed that stress dips can be formed in granite residual soil piles, occurring both in the center and locally. Stress dips evolve gradually through accumulation rather than being intrinsic properties of the piles. From a spatial perspective, no clear pattern is observed in the location of the stress dips. Quantitatively, as pile size increases, stress dips become more prevalent throughout the entire scope, although individual dips may dissipate. The normalized analysis of the central stress dip suggests that the normalized stress distribution pattern of the central stress dip is independent of pile size. The formation and evolution of stress dips are influenced by the force chain network, which consists of arch and ring force chains that are promoted by the supporting effect of the base plate and the particle squeezing effect.
AB - The stress dip, a local minimum in the vertical stress distribution beneath granular piles, has captured the interest of many researchers. Studying stress dips in granite residual soil is of critical importance due to its relevance to engineering projects, soil mechanics, and particle behaviors. The purpose of this study is to confirm the existence of the stress dip in granite residual soil and explore its evolution during accumulation. In this work, granite residual soil conical piles were formed by the localized source piling method in experiments. During the experiment, Teflon film was placed below the piles to hinder the formation of stress dips, while the vertical stress distribution beneath each pile at varying heights was measured to monitor the evolution of stress dips. Besides, DEM simulations were employed to analyze the formation and evolution mechanism of the stress dips. The experimental and simulation results showed that stress dips can be formed in granite residual soil piles, occurring both in the center and locally. Stress dips evolve gradually through accumulation rather than being intrinsic properties of the piles. From a spatial perspective, no clear pattern is observed in the location of the stress dips. Quantitatively, as pile size increases, stress dips become more prevalent throughout the entire scope, although individual dips may dissipate. The normalized analysis of the central stress dip suggests that the normalized stress distribution pattern of the central stress dip is independent of pile size. The formation and evolution of stress dips are influenced by the force chain network, which consists of arch and ring force chains that are promoted by the supporting effect of the base plate and the particle squeezing effect.
KW - DEM
KW - Granite residual soil
KW - Granular piles
KW - Stress dips
UR - http://www.scopus.com/inward/record.url?scp=105002925854&partnerID=8YFLogxK
U2 - 10.1007/s10035-025-01523-w
DO - 10.1007/s10035-025-01523-w
M3 - Article
AN - SCOPUS:105002925854
VL - 27
JO - Granular matter
JF - Granular matter
SN - 1434-5021
IS - 3
M1 - 47
ER -