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| Instability analysis of soil particle stress chain on slope based on persistent homology |
| Received:October 08, 2019 Revised:November 10, 2019 |
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| DOI：10.7511/jslx20191008002 |
| KeyWord:inner dump slope instability failure force chain discrete element persistent homology |
| Author | Institution |
| 陈龙飞 |
湘潭大学 土木工程与力学学院, 湘潭 |
| 游世辉 |
枣庄学院 机电工程学院, 枣庄 |
| 谢纯凯 |
湘潭大学 土木工程与力学学院, 湘潭 |
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| Abstract: |
| In this paper,the stability of inner dump slope at different heights is studied by the method of particle discrete element and the theory of persistent homology.In order to facilitate the study,a horizontal metal plate is used to apply downward pressure instead of gravity load to soil layers with different thickness to simulate the instability failure process of the slope under the vertical load.The macroscopic responses such as the total velocity vector of the two-dimensional slope deposit,the angle of the slip cracking surface when the slope is unstable,and the average velocity in the y-direction of the slope were studied.Then,the normal force chain undirected network model of the natural accumulation of slope stacking particles was constructed.Finally,the topological characteristics of the particle contact force chain network of the slope top were analyzed by the persistent homology method to obtain the barcode.Finally,the relationship between the instability evolution and the characteristics of persistent homology is established.This research provides a new method for the study of slope instability topology identification.Thus,the instability of slope destruction can be predicted effectively. |
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