Analysis of microcosmic mechanism of soil arching in frictional geotechnical material by particle flow simulating

HAN Gao-xiao; GONG Quan-mei; ZHOU Shun-hua

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Analysis of microcosmic mechanism of soil arching in frictional geotechnical material by particle flow simulating

更新时间：2026-06-25

- Analysis of microcosmic mechanism of soil arching in frictional geotechnical material by particle flow simulating
- Vol. 34, Issue 6, (2013)
- 作者机构：
  
  同济大学道路与交通工程教育部重点实验室,上海,201804
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU473
- Online First：14 June 2013，
  
  Published：2013
- 稿件说明：
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HAN Gao-xiao, GONG Quan-mei, ZHOU Shun-hua. Analysis of microcosmic mechanism of soil arching in frictional geotechnical material by particle flow simulating[J]. 2013, 34(6).
DOI：

HAN Gao-xiao, GONG Quan-mei, ZHOU Shun-hua. Analysis of microcosmic mechanism of soil arching in frictional geotechnical material by particle flow simulating[J]. 2013, 34(6). DOI：

摘要

利用离散单元计算软件模拟太沙基活动门试验，从散粒体和微观角度研究在摩擦型岩土材料中产生土拱效应时颗粒位移、荷载传递的特点，并进一步研究了颗粒粒径、土体孔隙率、颗粒摩擦系数、活动门宽度以及活动门位移对土拱效应的影响。结果表明：由于土拱的作用，从拱脚往上一定范围内会将拱顶上方的竖向荷载转化成水平荷载并向两侧传递，同时伴随着两侧土体的侧向挤出。伴随活动门的下移，土拱效应在不断调整，增大颗粒粒径、减小孔隙率、增大颗粒摩擦系数、减小活动门宽度，不但可加强土拱效应，而且还能减小土拱效应的影响范围。

Abstract

By simulating the “trapdoor” test of Terzaghi using discrete element program

the characteristics of displacement of particles and load transfer are studied from granular and microcosmic viewpoint when soil arching existing in frictional geotechnical material; moreover

the influences of particle diameter

porosity

particle frictional coefficient

width of trapdoor and trapdoor displacement on soil arching are also studied. The results indicate that due to the effect of soil arching

the vertical loading above soil arching is transformed to horizontal loading within a certain range above the arch foot; then the horizontal loading will transfer to both sides of soil

which leads to horizontal displacement of soil. When the trapdoor moves downward

the effect of soil arching evolves continuously; and enlarging the particle diameter and frictional coefficient

decreasing porosity and trapdoor width will not only enhance the effect of soil arching but also narrow the influence range of soil arching.

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