Analysis of particle flow for impacts of granular parameters and porosity on silt’s properties under biaxial compression

XU Guo-jian; SHEN Yang; LIU Han-long

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Analysis of particle flow for impacts of granular parameters and porosity on silt’s properties under biaxial compression

更新时间：2026-06-25

- Analysis of particle flow for impacts of granular parameters and porosity on silt’s properties under biaxial compression
- Vol. 34, Issue 11, (2013)
- 作者机构：
  
  1. 河海大学岩土力学与堤坝工程教育部重点实验室,南京,210098
  2. 上海市政工程设计研究总院（集团）有限公司,上海,200092
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU43
- Online First：11 November 2013，
  
  Published：2013
- 稿件说明：
移动端阅览
XU Guo-jian, SHEN Yang, LIU Han-long. Analysis of particle flow for impacts of granular parameters and porosity on silt’s properties under biaxial compression[J]. 2013, 34(11).
DOI：

XU Guo-jian, SHEN Yang, LIU Han-long. Analysis of particle flow for impacts of granular parameters and porosity on silt’s properties under biaxial compression[J]. 2013, 34(11). DOI：

摘要

针对颗粒流法中颗粒几何参数等对土体宏观力学性质的影响进行了数值模拟，并将数值模拟结果与室内模型试验验证进行了对比。对二维、三维下土体级配及孔隙率进行了理论分析，并提出二维数值试样颗粒数目及孔隙率转换公式。采用PFC2D软件进行了6组参数验证及24组交叉对比（含4组级配、3组孔隙率及2类接触模型）双轴压缩试验。结果表明：孔隙率对土体力学性质的影响大于级配；随着孔隙率增加，土体强度峰值逐渐降低，对应轴向应变增大，体应变则由剪胀性逐渐向剪缩性过渡。当孔隙率较低时，采用线性及Hertz-Mindlin (H-M)接触模型得到的模拟结果均较接近；而当孔隙率升高时，建议采用H-M接触模型，以更好地反映土体到达强度峰值后产生的后续剪胀效应。

Abstract

To analyze the impact of geometrical particle parameters on macromechanical properties of the soil in particle flow method

the conversion formula of the granule number and modified porosity of numerical sample group in the 2D condition was proposed; and the numerical simulation and the laboratory model tests were carried out. It conducted 6 groups of parameter validation tests and 24 groups of variables cross-comparison biaxial compression tests

and included 4 types of gradations

3 types of porosities and 2 kinds of contact models. The results show that the effect of porosity is larger than that of gradation on soil mechanical properties. With the increase of porosity

the peak value of soil strength gradually decreases; and the axial strains of corresponding points increase accordingly. Compared with the results of the Hertz-Mindlin (H-M) contact model which is focused on the nonlinear relation between the contact force and relative displacement; the results of the linear contact model are more reliable. Meanwhile the behavior of volumetric strain transited from dilatancy to negative dilatancy. And it is suggested when the porosity increases the H-M contact model reflected the subsequent dilatancy effect of soil after peak strength better.

关键词

Keywords

references

Views

1889

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

A 2-D polygon discrete element method and program for simulating rockfill materials

Prediction method for gradation-related mechanical behaviors of rockfill materials

Experimental study on drainage performance of reinforced improved soft rock residual soil under rainfall conditions

Study of reasonable support parameters for open-cut tunnel floor with shallow burial depth and abundant groundwater on seaside

PFC3D numerical experiments of self-boring in-situ shear pressuremeter model test under different consolidation pressures

Related Author

LUO Tao

OOI E T

CHAN A H C

FU Shao-jun

MA Shuang-xing

SHEN Chao-min

LIU Si-hong

WANG Xing

Related Institution

School of Civil Engineering, Wuhan University

School of Engineering & IT, Federation University Australia, Ballarat

School of Engineering and ICT, University of Tasmania

College of Water Conservancy and Hydropower Engineering, Hohai University

China Safety Energy Group Second Engineering Bureau Co., Ltd.

AI问答

⁰